Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
  • E06B3/6617—Units comprising two or more parallel glass or like panes permanently secured together one of the panes being larger than another
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
  • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
  • E04D13/0305—Supports or connecting means for sky-lights of flat or domed shape
  • E04D13/031—Supports or connecting means for sky-lights of flat or domed shape characterised by a frame for connection to an inclined roof
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
  • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
  • E04D13/035—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts
  • E04D13/0351—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis
  • E04D13/0354—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis the parts being flat

Definitions

• the present disclosure relates to a roof window.
• Building roof windows provides several advantages related to e.g. inflow of sunlight to the interior of the building. Also it may provide ventilation advantages. It is however desired that the roof window provides good heat insulation in order to e.g. reduce energy waste.
• Various roof window solutions have this been developed to obtain this. For example, it is known to provide insulation in the roof window frame in order to increase heat insulation performance. Also, an insulating glass unit comprising one or more insulated gaps may be used in order to increase heat insulation performance.
• VOG vacuum insulated glass
• patent document EP4242396 A1 disclosing an exterior VIG unit and a smaller interior glass sheet.
• Patent document EP1835120 A1 discloses a roof window with an adjustable rabbet and a VIG unit.
• Patent document WO2020147909 A1 discloses a solution where a VIG unit comprises an overlapping part so that an evacuated gap overlaps an elongated, structural bottom member of a sash.
• the present disclosure relates to a roof window for installation in a roof structure of a building.
• the roof window comprises a frame and an insulated glass unit.
• the insulated glass unit is attached to the frame.
• the insulated glass unit comprises a first glass sheet and second glass sheet, and at least one insulating gap is placed between the first glass sheet and the second glass sheet.
• An edge seal encloses the insulating gap.
• the first glass sheet is configured to be an exterior glass sheet comprising an exterior major surface. This exterior major surface is configured to face away from the interior of the building when the roof window is installed in the roof structure.
• the insulated glass unit moreover comprises a lamination interlayer and a further glass sheet. The lamination interlayer bonds to a major surface of the further glass sheet.
• the lamination interlayer moreover bonds to a major surface of the second glass sheet.
• the second glass sheet comprises an extending glass sheet portion which projects beyond an edge of the further glass sheet with a distance.
• An overlapping part of the further glass sheet comprising said edge of the further glass sheet is arranged to overlap a frame profile of the frame.
• the extending glass sheet portion which projects beyond the edge of the further glass sheet may provide several advantages. For example, it may result in providing a space saving or space optimizing solution. It may be advantageous to provide space optimization at windows in order to e.g. obtain a visually desirable design, for example while enabling providing e.g. a window with one or more of improved heat insulation performance, structural advantages, safety related features and/or material savings.
• a solution according to embodiments of the present disclosure may also result in a smaller lamination glass, i.e. the further glass sheet, when compared to e.g. the size of the other glass sheet that the lamination interlayer bonds to. This may e.g.
• lamination interlayer may also be relevant to provide lamination glass sheets having a smaller size than the second glass sheet to which it adheres by means of the lamination interlayer, since the adaption and cutting of the lamination interlayer during manufacturing may be accepted to be less precise, and larger cutting tolerances may hence be accepted during manufacturing. Additionally or alternatively, it may allow for the lamination interlayer to flow to a position beyond the edge of the lamination glass sheet/further glass sheet when the lamination interlayer is heated and softened during the lamination process.
• roof windows are manufactured in a number of predefined sizes that are not customizable. Hence, providing a glass sheet of reduced size may be acceptable and may be cost efficient since only a limited number of sizes of the further glass sheet need to be made.
• the overlapping part of the further glass sheet may help to carry glass sheet fractions if a glass sheet of the insulated glass unit is broken.
• the further glass sheet may be a lamination glass sheet that may e.g. provide mechanical protection.
• the overlapped frame profile(s) is/are preferably a structural frame profile, such as a structural frame profile of a movable frame of the roof window.
• said edge of the further glass sheet which the extending glass sheet portion extends beyond may be a bottom edge of the further glass sheet.
• a larger frame overlap by the glass unit may be provided at the bottom of the roof window when compared to e.g. at sides of the roof window, to e.g. improve visual appearance and/or obtain improved water tightening and/or thermal insulation performance of the roof window.
• a longer extending glass sheet portion may also be allowed at the bottom of the window, thereby e.g. increasing the reduction of CO 2 footprint.
• said edge of the further glass sheet may be an arranged at a side of the roof window and/or at the top of the roof window This may e.g. provide space optimization, provide a utility space for other usage and/or reduce CO 2 footprint.
• the second glass sheet may comprise extending glass sheet portions which projects beyond a plurality of edges extending between different corners of the further glass sheet.
• the second glass sheet comprises extending glass sheet portions which projects beyond the edge of the further glass sheet at two or more of, such as at three or more of:
• an overlapping part of the further glass sheet comprising said edge which the respective extending glass sheet portion projects beyond may be arranged to overlap a frame profile of the frame at the respective top area, bottom area and/or side area of the roof window where said extending glass sheet portions is arranged.
• the second glass sheet may comprise extending glass sheet portions which projects beyond the edge of all four of:
• an overlapping part of the further glass sheet comprising said edge which the respective extending glass sheet portion projects beyond may be arranged to overlap a frame profile of the frame at the respective top area, bottom area and/or side area of the roof window where said extending glass sheet portions is arranged.
• At least one edge of the further glass sheet may be substantially flush and parallel to an edge of another glass sheet of the insulated glass unit.
• that other glass sheet may be the glass sheet that the lamination interlayer is attached to. Thereby, it may be more easy to align and position the further glass sheet relative to the rest of the glass sheets of the insulated glass unit.
• the distance with which the extending glass sheet portions projects beyond said edge of the further glass sheet is different at different sides of the insulated glass unit.
• the distance with which the extending glass sheet portion projects beyond said edge of the further glass sheet may be larger at the bottom area of the roof window than at the side area(s) of the roof window, since the insulated glass unit may overlap a larger portion of the frame construction of the window at the bottom in roof windows. This may e.g. be the case in roof windows of the top hung type and/or center hung type.
• PVB, EVA or TPU may be used for the lamination interlayer. Other materials may however also be used.
• the lamination interlayer may be of the sound dampening type, also called an acoustic lamination interlayer.
• an acoustic lamination interlayer may be obtained by using one or more sheets of acoustic lamination interlayer material.
• Such acoustic lamination interlayers have shown to provide good dampening of noise from rain striking the exterior glass sheet of a roof window, especially noise in the frequency range perceivable to the human ear, for example within the range of 20 Hz to 13000 Hz, such as within the range of 200 Hz to 8000 Hz.
• Also such acoustic lamination interlayers have shown to be advantageous during safety drop tests where a ball or another heavy object is dropped to damage the insulated glass unit. The acoustic lamination interlayer helps to catch such a ball.
• This sheet of lamination interlayer material may be made from multiple sub-sheets, such as e.g. 3 or more sheets, such as four or more sub-sheets.
• the sub-sheets are stacked and may or may not be bonded together prior to the lamination process.
• the sub-sheets have different characteristics.
• one or more of the sub-sheets, such as a middle sheet of the sub-sheets may have a glass transition temperature of lower degrees than sub-sheets arranged at each side of the middle layer.
• the surface area of a major surface of the further glass sheet may be at least 2% less, such as at least 3% less, such as at least 5% less than the surface area of a major surface of the neighboring glass sheet that the lamination interlayer is attached to. This may e.g. provide increased space saving and/or reduction in CO 2 footprint without compromising safety. Additionally or alternatively, it may have a noticeable impact in reducing the CO 2 footprint of a building window, since building windows are often manufactured in larger numbers.
• the surface area of a major surface of the further glass sheet may be between 2% - 15% less, such as between 3% - 10% less, such as between 4%-8% less than the surface area of a major surface of the neighboring glass sheet that the lamination interlayer is attached to.
• the total surface area of a major surface of the exterior glass sheet may be larger than the total surface area of the adjacent glass sheet, such as the second glass sheet.
• the distance with which the extending glass sheet portion projects beyond the edge of the further glass sheet may be at least 10 mm, such as at least 20 mm, such as at least 50 mm. This may e.g. provide space optimization and reduce the CO 2 footprint.
• the first glass sheet comprises a projecting glass sheet portion which projects with a projecting distance beyond an edge of the extending glass sheet portion. In some embodiments, this may be provided at the bottom of the roof window and/or at side and/or top of the roof window. This may further reduce the CO 2 impact of the roof window, while e.g. also providing advantages in relation to obtaining an aesthetically appealing roof window and/or a window having advantages in relation water proofing with regards to rain water.
• a gasket may be arranged between the overlapped frame profile and the overlapping part of the further glass sheet, such as wherein the gasket abuts the further glass sheet and/or the frame.
• one or more of the edge(s) of the insulated glass unit which is/are arranged along the top, bottom and/or side(s) of the roof window may be insulated by means of edge heat insulation that is arranged opposite to the edge region of the insulating glass unit.
• the edge heat insulation may be configured so as to reduce heat transfer at the area of the edge seal enclosing the evacuated gap when compared to a scenario where the edge heat insulation is omitted. If the insulated glass unit is a vacuum insulated glass unit, the edge seal enclosing the evacuated gap may have poor heat insulation performance. The edge heat insulation may help to reduce issues caused by this poor heat insulation performance.
• a utility space may be arranged opposite to, such as next to, the extending glass sheet portion and opposite to, such as next to, said edge of the further glass sheet which the extending glass sheet portion (3p2) projects beyond.
• This may e.g. provide space optimization and/or provide a solution wherein one or more features may be build into a window that is based on a previous design. For example, edge heat insulation provides a window with improved heat insulation performance.
• Using the space for electrically conducting wires may enable a space saving solution and/or a solution that may be aesthetically appealing since the wires are hidden.
• Photovoltaic elements may provide an advantageous power supply as roof windows are often arranged remote and not necessarily near a mains supply.
• Using the space for lamination interlayer excess material may provide advantages with regards to window manufacturing.
• the connection part may provide advantages such as with regards to attachment, space saving, vibration damping and/or the like.
• edge heat insulation material may be arranged in a (such as the) utility space arranged opposite to the narrow edge surface of the edge of the further glass sheet which the extending glass sheet portion (3p2) projects beyond.
• the edge heat insulation may also be arranged opposite to, such as below the, the extending glass sheet portion.
• the insulated glass unit is a vacuum insulated glass unit, This may be advantageous.
• the edge seal of a VIG unit may act as a cold bridge.
• the edge heat insulation material may provide advantages in relation to e.g. reducing cold bridge effects caused by such an edge sealing.
• the edge heat insulation material may be arranged with a distance to said narrow edge surface of the further glass sheet.
• This may e.g. allow for larger tolerances when shaping and/or cutting the lamination interlayer, and/or when softening the lamination interlayer during the lamination process.
• an extending part of the lamination interlayer may project beyond the edge of the overlapping part of the further glass sheet, and wherein the extending glass sheet portion overlaps said extending part of the lamination interlayer.
• the extending part may originate from lamination interlayer residue caused by the lamination interlayer flowing into the utility space during the lamination process and/or due to less precise cutting of the lamination interlayer.
• the frame comprises a movable frame and a fixation frame, wherein the movable frame is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges, wherein the insulated glass unit (3) is attached to the movable frame and is configured to move together with the movable frame.
• the roof window may be a roof window of the center hung type.
• This may e.g. provide enhanced ventilation options since the movable frame can be opened from a closed position to an open position. It may moreover provide emergency escape possibilities.
• the hinges may provide a rotation axis for the movable frame that is arranged between the top and bottom profiles and is substantially parallel to the longitudinal direction of the top and bottom profiles. This may be the case in a centre hug type roof window.
• the rotation axis may be substantially horizontal after roof window installation.
• Roof windows of the centre hung type may e.g. provide the advantage of enabling rotation of the movable frame so that the exterior surface of the glass unit at least partly faces the building interior during window wash and thereby is more easy to clean from the inside of the building.
• the roof window is of the top hung type. In some embodiments hereof, the roof window is of the non-centre hung type. In other embodiments, the roof window may comprise a movable frame that is both top hung and centre hung.
• the movable frame may comprise a first structural bottom profile
• the fixation frame may comprise a further structural bottom profile.
• the exterior glass sheet may partly or fully overlap the full width of the first structural bottom profile. In some embodiments, the exterior glass sheet may partly or fully overlap the full width of the further structural bottom profile.
• the roof window is configured to be installed in a roof structure having a roof pitch above 17°, such as above 30°, relative to horizontal.
• the extending glass sheet portion may extend beyond an edge that faces away from a frame opening of the frame, such as a frame opening provided by a movable frame, and extend to ovedrlap a profile of a fixation frame.
• the insulating gap may partly or fully overlap a frame profile of the frame at one or more of the bottom, top and/or one or both sides of the roof window. This may e.g. provide advantages with regard to one or more of water tightening, the overall heat insulation performance of the roof window (due to reduction of heat transfer caused by a bridge), and/or aesthetics.
• the frame such as the movable frame and/or the fixation frame, may comprise a top frame profile at the top of the roof window, a bottom frame profile at the bottom of the roof window, and side frame profiles extending between the top profile and bottom profile.
• the frame comprises a fixation frame comprising a top frame profile at the top of the roof window, a bottom frame profile at the bottom of the roof window, and side frame profiles extending between the top frame profile and bottom frame profile of the fixation frame, wherein said profiles encloses a frame opening.
• the frame comprises a movable frame comprising a top frame profile at the top of the roof window, a bottom frame profile at the bottom of the roof window, and side frame profiles extending between the top profile and bottom profile of the movable frame, wherein said profiles encloses a frame opening, wherein the insulated glass unit is attached to the movable frame.
• the fixation frame may be larger than the movable frame. In one or more embodiments of the present disclosure, the fixation frame may enclose the outer boundary of the movable frame. In one or more embodiments of the present disclosure, the movable frame may be arranged in the frame opening of the fixation frame.
• the insulating gap partly or fully overlaps said overlapped frame profile of the frame.
• said overlapped frame profile may be a bottom frame profile of a movable frame.
• the insulating gap may or may not project beyond the bottom profile of the movable frame, for example so as to further overlap a bottom profile of the fixation frame.
• the insulating gap may partly or fully overlap at least 30%, such as at least 60% or at least 90% of the width of a structural frame profile, such as said overlapped frame profile, at one or more of the roof window bottom, roof window side(s) and/or roof window top.
• the insulated glass unit may be a Vacuum Insulated Glass (VIG) unit.
• VOG Vacuum Insulated Glass
• at least one of said at least one insulating gap is an evacuated gap, and a plurality of support structures are distributed in the evacuated gap so as to maintain a distance between a first major surface of a glass sheet of the insulated glass unit which faces towards the evacuated gap and a first major surface of another glass sheet of the insulated glass unit which faces towards the evacuated gap.
• a Vacuum Insulated Glass unit differs from a regular insulated glass unit only comprising a gas filled gap due to the atmospheric pressure of 10 tons/m 2 affecting the VIG unit and support structures. Further a VIG hermetic edge seal does not have the flexible toughness of regular IGU seals. These among other factors require different design considerations to make a reliable roof window.
• the lamination layer may provide strength and stiffness to the insulated glass unit, such as a vacuum insulated glass unit.
• a VIG unit may be exposed to the atmospheric pressure of 10 tons/m 2 and undergoes lateral gravity pull since having a component in the direction perpendicular to the exterior major surface of the VIG unit since it is arranged in a roof window. Even more so when it snows and a snow load rests on the glass.
• the atmospheric pressure of 10 tons/m 2 makes the two VIG unit glass panes transfer forces between each other so the lamination layer provides stiffness to both the inner VIG glass pane and to the outer VIG glass pane.
• the lamination layer can reduce the number of falling parts in case of glass unit breakage and/or extend the time (e.g. during fire) before the unit fails.
• the lamination interlayer may have a thickness above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm.
• a thicker lamination layer having a thickness above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm may provide a stronger glass unit than provided by e.g. a 0.38 mm or 0.4 mm lamination interlayer.
• This lamination interlayer thickness may additionally or alternatively be advantageous if it is used for adhering to a thermally tempered glass sheet, due to e.g. surface unevenness, such as so called roller waves, of the thermally tempered glass sheet.
• the lamination interlayer with such a thickness may e.g. also help to reduce rain noise which may be especially relevant in roof windows.
• VIG units have shown signs of being rather loud/ less noise damping within certain frequencies detectable by humans when subjected to rain, such as heavy rain.
• the lamination interlayer thickness may help to reduce such noise.
• the lamination interlayer has a thickness between 0.5 mm and 4 mm, such as between 0.6 mm and 3 mm, such as between 0.7 mm and 2 mm.
• the lamination interlayer thickness may be lower than 0.5 mm.
• the glass sheets arranged at each side of the evacuated gap may be tempered glass sheets, such as thermally tempered glass sheets.
• the insulated glass unit is a vacuum insulated glass unit, it is advantageous to use thermally tempered glass sheets at each side of the evacuated gap. Thermally tempered glass sheets are stronger than non-tempered glass sheets, such as annealed glass sheets, and may allow for a larger distance between the support structures. Lower glass thickness may also be used when using thermally tempered glass sheets.
• the first glass sheet and/or second glass sheet has a thickness of between 2.5 mm and 5 mm, such as between 3 mm and 4.5 mm, such as 3 mm or 4 mm.
• the insulated glass unit comprises at least two insulating gaps which are arranged between the first and second glass sheets, and wherein an intermediate glass sheet is arranged between the first and second glass sheets.
• a first of said insulating gaps may this be arranged between a first major surface of the intermediate glass sheet and a major surface of the first glass sheet which faces the intermediate glass sheet, and a second of said insulating gaps is arranged between a second major surface of the intermediate glass sheet and a major surface of the second glass sheet which faces the intermediate glass sheet.
• the insulated glass unit is an insulated glass unit comprising just two, or two or more gas filled insulating gaps separated by an intermediate glass sheet.
• the insulated glass unit is an insulated glass unit comprising just two, or two or more evacuated, insulating gaps separated by an intermediate glass sheet.
• the insulated glass unit is a hybrid vacuum insulated glass unit comprising both an evacuated, insulating gap and a further gas filled insulating gap, where said gaps are separated by an intermediate glass sheet.
• an adhesive such as a glue and/or a tape
• a glue and/or a tape may be arranged between the overlapping part of the further glass sheet and the overlapped frame profile of the frame, so that said adhesive attach the insulated glass unit directly or indirectly to the overlapped frame profile, such as wherein said adhesive is a structural adhesive. This may provide a strong and/or safe solution and/or enable aesthetic design advantages.
• the roof window comprises a side water channel at one or both sides of the roof window, such as wherein said side water channel is integrated at a member, such as a holding member, which is attached to a frame profile of the frame. This may e.g. provide enhanced handing and guidance of rain water.
• a water tightening is arranged between an the exterior surface of the exterior glass sheet and an overlapping part of said holding member which overlaps a part of the major surface of the exterior glass sheet that faces away from the second glass sheet.
• a water tightening seal such as a rubber gasket and/or a butyl strip, may be arranged to provide water tightening between the overlapping part of said member and said overlapped surface of the glass sheet.
• connection part of a support member such as a metal profile member, may be attached to the extending glass sheet portion of said second glass sheet by means of one or more adhesives such as one or more structural adhesives.
• a connection part of a support member such as a metal profile member, may be attached to the extending glass sheet portion of said second glass sheet by means of one or more adhesives, such as one or more structural adhesives, wherein the a connection part is attached to a major surface of the extending glass sheet portion of the second glass sheet that faces away from the exterior glass sheet by means of the one or more adhesives.
• This may e.g. provide a space saving solution and/or provide an advantageous fixation of the insulated glass unit to the frame, such as a movable frame of the window.
• the one or more adhesives may directly or indirectly adhere to the extending glass sheet portion.
• said support member and/or said one or more adhesives is/are configured to provide support and/or vibration dampening when mechanical forces strikes a part of the exterior glass sheet, such as strikes a part of the exterior glass sheet that is arranged opposite to the extending glass sheet portion, and/or strikes a projecting glass sheet portion of the exterior glass sheet that projects with a projecting distance beyond an end edge of the extending glass sheet portion.
• Tests in a hail simulator have indicated that such as solution may be beneficial if e.g. using a VIG unit as the insulated glass unit, as it may help to provide a window that can e.g. resist large hails.
• the test also indicated that a hail resistant solution may be obtained in embodiments where the exterior glass sheet comprises a stepped portion (projecting glass sheet portion) that extends beyond said extending glass sheet portion of the second glass sheet, and when the hail simulator shot hail substitutes towards the stepped portion.
• connection part and/or said one or more adhesives may thus in some embodiments help to provide a roof window with an insulated glass unit, such as a VIG unit, that is more resistant to exterior forces impacting the a part of the exterior glass sheet that is arranged opposite to the extending glass sheet portion and/or strikes the projecting glass sheet portion that projects with a projecting distance beyond an end edge of the extending glass sheet portion, when compared to a situation where the connection part and/or said one or more adhesives is/are omitted.
• an insulated glass unit such as a VIG unit
• said support member may or may not comprises a cladding member, which cladding member comprises a covering part configured to provide water tightening at the bottom part of the roof window.
• the covering part of the cladding member may cover a bottom part of the roof window.
• the covering part may extend to a position opposite a bottom part of the fixation frame.
• the covering part extends in a direction away from a plane comprising a major surface of a glass sheet of the insulated glass unit, to a position opposite the exterior of the frame, such as the exterior of a fixation frame. This may provide improved water tightening.
• the support member may be attached, to a structural profile of the frame, such as to a structural profile of a movable frame , by means of one or more attachment parts.
• This may e.g. provide a simple and/or cost efficient solution.
• one or more of the one or more attachment parts is/are unitary with the connection part.
• the support member may thus comprise the attachment part and the connection part.
• the support member comprising these parts may or may not be L-shaped.
• one or more of said one or more attachment parts may mechanically engage, such as directly mechanically engage, with the support member, such as said connection part, by means of an engagement member, such as a hook.
• connection part may be pre-attached to the new insulated glass unit, whereas the attachment parts in some embodiments may be reused.
• a holding profile may overlap the exterior major surface of the insulated glass unit and extend to a position opposite the further glass sheet at one or both sides of the roof window, wherein the holding profile is attached to said overlapped frame profile of the frame.
• This provides a safety measure in case the insulated glass unit breaks, as the holding profile acts as mechanical stop that may prevent parts of the insulated glass unit from disconnecting from the window frame.
• said insulated glass unit comprises only a single insulating gap, such as wherein said single insulating gap is either:
• An evacuated gap i.e. the evacuated gap of a VIG unit comprising a plurality of support structures
• An evacuated gap provides superior heat insulation when compared to a gas filled gap.
• one or more low-e coatings may be arranged at a major surface facing towards an insulating gap of the insulated glass unit, and e.g. facing towards the exterior glass sheet.
• Said edge of the further glass sheet, the edge of the extending glass sheet portion and optionally said end edge of the first projecting glass sheet portion may be elongated and substantially parallel.
• the insulating gap such as an evacuated gap, may overlap at least 50%, such as at least 80%, of the maximum width of said overlapped frame profile of the frame.
• This may e.g. enable providing aesthetic advantages and/or improve heat insulation performance of the roof window.
• said overlapped frame profile is may be a side profile of a movable frame.
• the insulated glass unit may be one unitary glazing component, such as wherein the first and second glass sheets are bonded together by means of one or more edge seals so as to constitute said unitary glazing component.
• a top cover of the roof window may overlap the exterior major surface of the exterior glass sheet at the top of the roof window.
• the exterior surface of the vacuum insulated glass unit may be configured to substantially coincide with or be arranged below an exterior plane defined by a flashing of the roof window. Additionally or alternatively, the exterior surface of the vacuum insulated glass unit may be configured to substantially coincide with or be arranged below an exterior plane defined by a roofing when the roof window is installed in a roof structure of the building. This may e.g. provide a more aesthetically desirable solution.
• the exterior major surface of the vacuum insulated glass unit is comprised in a first plane, wherein the first plane is configured to substantially coincide with or be arranged below a second, exterior plane defined by a flashing and/or is defined by a part of the roof structure, when the roof window is installed in a roof structure of the building. This may e.g. provide a more aesthetically desirable solution.
• the first plane and the second plane may be configured to be substantially parallel, such as at least when a movable frame of the roof window is in a closed position.
• the vacuum insulated glass unit comprises a further insulating gap. This provides improved heat insulation.
• the present disclosure moreover relates to building comprising one or more roof windows according to one or more of the embodiments described above, wherein said one or more roof windows is/are installed in a roof structure of the building.
• Fig. 1 illustrates schematically a cross section of a roof window 1 for installation in a roof structure of a building (not illustrated in fig 1 ).
• the roof window comprises a frame 2 and a vacuum insulated glass unit 3.
• the frame 2 comprises a movable frame 2a (also called movable unit in the present document) and a fixation frame 2a.
• the movable frame 2a is configured to move, such as pivot, relative to the fixation frame 2b by means of one or more hinges (not illustrated in fig. 1 ) between an open position and a closed position.
• the window 1 can open and close.
• the vacuum insulated glass unit 3 (may also be referred to as glass unit 3 in the below) is attached to the movable frame 2a and is configured to move together with the movable frame 2a.
• the movable frame 2a comprises a first frame opening FO1 that is enclosed by structural frame profiles 2a_to, 2a_bo, at the top TO and bottom BO of the roof window respectively.
• the movable frame 2a moreover comprises two structural side frame profiles 2a_si (one is visible in fig. 1 ) extending between the top profile 2a_to and bottom profile 2a-bo.
• the frame profiles of the movable frame 2a together encloses the first frame opening FO1, which may be a rectangular frame opening, through which sunlight can pass from the vacuum insulated glass unit.
• the roof window 1 in fig. 1 is a roof window of the centre hung type.
• the movable frame 2a is enclosed by a fixation frame 2b which provides a second frame opening FO2.
• a bottom profile surface 2a_bos1 (See figs 2A-2B ) of the movable frame 2a faces the first frame opening FO1 whereas an oppositely directed surface 2a_bos2 (See figs 2A-2B ) of that bottom profile 2a_bo faces the fixation frame 2b.
• the fixation frame 2b encloses the second frame opening FO2.
• the second frame opening FO is arranged between structural top 2b_to and bottom 2b_bo profiles, as well as between structural side profiles 2b_si (one is visible in fig.
• the fixation frame 2b is configured to be fixed to, such as build into, a building roof structure.
• the roof window 1 comprises water tightening covers comprising a top cover 24 and a cladding member 13.
• the roof window 1 may also comprise side water covers 21a, 21b (not illustrated in fig. 1 ). These covers are described in more details further below.
• the frame profiles 2a_bo, 2a_to, 2a_si of the movable frame 2a and/or the frame profiles 2b_bo, 2b_to, 2b_si of the fixation frame 2b may be substantially solid, e.g. made partly or fully from a wood material or a combination of materials.
• one, more than one, or all, of the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si may comprise an outer shell provided by exterior profile walls providing the outer profile boundary.
• the exterior walls may be structural.
• the exterior walls may in some embodiments comprise or consist of a polymer wall such as comprising a Polyvinyl Chloride (PVC) walls such as Chlorinated Polyvinyl Chloride (CPVC).
• PVC Polyvinyl Chloride
• CPVC Chlorinated Polyvinyl Chloride
• the polymer wall material of the exterior walls may be reinforced by means of reinforcements, such as fibres, such as glass fibres or carbon fibres, intermixed with the polymer wall material.
• the polymer wall material may comprise between 15% and 35% fibre reinforcement by WT profile wall material, such as between 20% and 30% fibre reinforcement by weight profile wall material.
• the exterior profile walls may not comprise fibre reinforcement.
• the fibre reinforcement content by WT profile wall material may be less than 3%, such as less than 1% or less than 0.5% by weight.
• the exterior walls of the frame profiles may enclose a frame profile interior comprising one or more interior chambers. This/these chambers may provide heat insulation.
• one or more of the one or more interior chambers may be filled with an insulation material such as comprising an expanded foam, mineral wool, glass wool, natural fibre based insulation and/or the like.
• one or more reinforcements such as metal reinforcements, such as aluminium, iron or steel reinforcements, may be arranged in or at the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si to increase the structural strength.
• the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si are elongated, and in fig. 1 , a schematic cross section of profiles 2a_bo, 2a_to, 2b_bo, 2b_to is illustrated where the cross section plane is substantially perpendicular to the longitudinal direction of these profiles 2a_bo, 2a_to, 2b_bo, 2b_to.
• the cross section plane is substantially parallel with the longitudinal direction of the side profiles.
• the movable frame 2a may or may not comprise a handle 27 for manually operating the movable frame between a closed and open position/state.
• the handle may be directly or indirectly connected to a locking mechanism (not illustrated) that enables locking the movable frame 2a relative to the fixation frame 2b in at least the closed position of the movable unit.
• the vacuum insulated glass unit 3 comprises a first glass sheet 3a comprising a first major surface 3a1, and a second glass sheet 3b comprising a second major surface 3b1. These major glass sheet surfaces 3a1, 3b1 faces each other and an evacuated gap 4 paced between the major surfaces 3a1, 3b1.
• the glass sheet surfaces 3a1, 3b1 are substantially parallel.
• the glass sheets also comprises oppositely directed, major surface 3a2. 3b2 facing away from the evacuated gap 4.
• a plurality of support structures 5 are arranged between the glass sheet surfaces 3a1, 3b1 with a mutual distance to the neighbouring support structures. These support structures 5 are distributed inside the evacuated gap 4 according to a predetermined pattern, e.g. in rows and columns. The support structures 5 maintains the gap 4 between the major glass sheet surfaces 3a1, 3b1 of the vacuum insulated glass (VIG) unit when the gap 4 has been evacuated and sealed.
• VIP vacuum insulated glass
• the glass sheets 3a, 3b are sealed together at the periphery of the glass sheets 3a, 3b with the plurality of support structures 5 arranged between the major surfaces 3a1, 3b1 in the evacuated gap 4.
• the sealing together of the first and second glass sheets 3a, 3b may comprise use of an edge seal 9 material such as a solder glass edge seal material or a solder metal edge seal material.
• the edge seal 9 material may comprise solder material such as a glass solder material, for example a glass solder frit material, such as a low melting point glass solder frit material.
• the vacuum insulated glass unit 3 may in some embodiments comprise more than 300 support structures 5, such as more than 1000 or more than 2000 support structures 5arranged in the evacuated gap 4.
• the vacuum insulated glass unit 3 may in some embodiments comprise between 500 and 10000 support structures 5 , such as between 1000 and 600 support structures in the evacuated gap 4.
• the low melting point glass solder frit material may have a rated melting temperature Tm below 500 °C, such as below 450 °C, such as below 410 °C. In some embodiments of the present disclosure, the low melting point glass solder frit material may have a rated melting temperature Tm above 300 °C, such as above 340 °C.
• the sealing together of the glass sheet 3a, 3b at the edges by the edge seal 9 may provide a fused, rigid edge seal.
• the edge seal encloses the evacuated gap around the periphery/outer boundary of the evacuated gap 4.
• Both major surfaces 3a1, 3b1 of the first and second glass sheet 3a, 3b which face the evacuated gap 4 may, in embodiments of the present disclosure, extend so as to cover the full, maximum width of the edge seal 9. This may be the case for the full extent of the edge seal 9 around the evacuated gap 4.
• the edge seal 9 may be arranged so as to substantially not extend beyond the glass sheet edges of the first 3a and second 3b glass sheets arranged proximate the edge seal 9.
• one or both glass sheets 3a, 3b may extend beyond the side 9a of the edge seal 9 facing away from the evacuated gap.
• the side 9a of the edge seal 9 facing away from the evacuated gap may be arranged between the major surfaces 3a1, 3b1 of the glass sheets 3a, 3b.
• One or both glass sheets 3a, 3b may have a thickness between 1 mm and 6 mm, such as between 2 mm and 4 mm, for example between 2.5 mm and 3.5 mm including both end points.
• the glass sheets 3a, 3b may be of the same or different thickness.
• one or both glass sheets 3a, 3b has a thickness of between 2.5 mm and 5 mm, such as between 3 mm and 4.5 mm, such as 3 mm or 4 mm.
• the glass sheets 3a 3b may be annealed glass sheets or tempered glass sheets, such as thermally tempered glass sheets.
• Thermally tempered glass sheets 3a, 3b may e.g. allow providing a VIG unit with larger mutual distance between adjacent support structures 5 and/or may allow use of thinner glass sheets 3a, 3b than if using annealed glass sheets.
• the distance between neighbouring support structures 5 in the gap 4 may in embodiments of the present disclosure be between 20 mm and 70 mm, such as between 25 mm and 65 mm, such as between 35 mm and 45 mm.
• the major surfaces 3a1, 3a2, 3b1, 3b2 of these may be uneven due to e.g. a plurality of so-called roller waves, bending and/or due to global edge kink. These characteristics may originate from the manufacturing process of the thermally tempered glass sheets.
• the evacuated gap 4 has been evacuated to a reduced pressure (e.g. provided at an evacuation and sealing station.
• a reduced pressure e.g. provided at an evacuation and sealing station.
• the pressure in the evacuated gap 4 may be below 0.05 mbar, such as below 0.005 mbar, such as 0.003 or 0.001 mbar or below. This may be obtained by means of an evacuation pump before sealing the gap 4.
• a pump may have been connected directly or indirectly to an evacuation hole of the VIG unit assembly, and after the evacuation, the evacuation hole is sealed by a gap sealing, such as at least partly by means of a solder material and/or another sealing solution, such as a permanent sealing solution.
• the evacuation hole sealing solution may comprise a solder material and/or a glass pipe to be sealed by heating when the gap 4 has been finally evacuated to provide a VIG unit.
• the evacuation of the gap 4 may be provided by means of a suction cup (not illustrated) arranged to cover an evacuation hole. In other embodiments, the evacuation may be provided inside an evacuation chamber.
• the support structures 5 maintain a distance between the glass sheet surfaces 3a1, 3b1 across the evacuated gap when the gap 4 has been evacuated and sealed to provide the final VIG unit.
• the distance between the major glass sheet surfaces 3a1, 3b1 facing the gap may in embodiments of the present disclosure be 0.5 mm or below, such as 0.3 mm or below, for example 0.2 mm or below.
• the distance between the major glass sheet surfaces 3a1, 3b1 facing the evacuated gap 4 may in embodiments of the present disclosure be between 0.05 mm and 0.6 mm, such as between 0.1 mm and 0.4 mm, such as between 0.15 and 0.25 mm. It is understood that the support structures 5 may have a height substantially matching such a gap height / distance between the glass sheet surfaces 3a1, 3b1.
• the final VIG unit 3 may e.g. be transparent to at least visible light, i.e. light in the spectrum that is visible to the human eye.
• the vacuum insulated glass unit may also, in embodiments of the present disclosure, comprise a lamination layer 3c, 6.
• a lamination layer 3c for example a multi-layer lamination layer, as illustrated.
• the lamination layer 6, 3 in fig. 1 comprises a lamination interlayer 6.
• the lamination interlayer 6 may in embodiments comprise or consist of one or more of the following: ethylene vinyl acetate (EVA),
• PVB, EVA or TPU may be preferred for the lamination interlayer.
• the lamination interlayer 6 may have a thickness (extending between the adjacent glass sheet surfaces) above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm.
• the lamination interlayer 6 has a thickness between 0.5 mm and 4 mm, such as between 0.6 mm and 3 mm, such as between 0.7 mm and 2 mm or between 1 mm and 3 mm.
• the lamination layer also, in fig. 1 , comprises a further glass sheet 3c attached to said lamination interlayer 6.
• the further glass sheet 3c may be tempered, such as thermally tempered, or annealed.
• the further glass sheet 3c also called a lamination glass sheet 3c in this document, may have the same thickness, a lower thickness or a larger thickness, than the glass sheet thickness of the first and second glass sheets 3a, 3b.
• the lamination layer 3c, 6 provides safety and may e.g. carry broken parts of the glass unit 3 in case of breakage thereof, thereby reducing the number of falling parts.
• the roof window is configured to be installed in a building roof structure so that the first glass sheet 3a of the vacuum insulated glass unit 3 is configured to be placed closer to the exterior EXT of the building than the second glass sheet 3b.
• the vacuum insulated glass unit 3 comprises an exterior glass sheet EGS.
• the exterior glass sheet is the first glass sheet 3a.
• the exterior glass sheet is configured to be the outermost glass sheet arranged proximate the building exterior and which may act as a weather shield when the movable frame is in a closed position as e.g. illustrated in fig. 1 .
• the exterior glass sheet EGS comprises the outer major surface of the glass unit 3 that faces towards the building exterior EXT and may abut the building exterior.
• the exterior glass sheet EGS comprises a first projecting glass sheet portion 3p1.
• This first projecting glass sheet portion 3p1 projects beyond a bottom edge 3b_be of the second glass sheet 3b with a first projecting distance DIS1,
• the bottom edge of the second glass sheet 3b is configured to be the bottom edge of the glass sheet 3b that is arranged at the roof window bottom BO when the roof window is installed in the roof structure.
• the evacuated gap 4 of the glass unit 3 is arranged between the major surface 3a1 of the exterior glass sheet 3a and the major surface 3b1 of the second glass sheet, where the second glass sheet 3b is adjacent to the exterior glass sheet EGS, 3a of the vacuum insulated glass unit 3.
• the first projecting glass sheet portion 3p1 projects with the first projecting distance DIS1 beyond the bottom edge 3b_be of the glass sheet 3b of the vacuum insulated glass unit 3 which is adjacent to the exterior glass sheet 3a, 3d EGS of the vacuum insulated glass unit 3.
• the roof window is configured to be installed so that the window top TO is arranged at a higher vertical level than the window bottom BO.
• the top part of the movable frame 2a is configured to move into the building, see dashed arrow AR1 whereas the bottom part of the movable frame 2a is configured to move towards the exterior of the building, see dashed arrow AR2.
• the rotation point for the movable frame 2a may be arranged between the top and bottom profiles 2a_bo, 2a_to, for example around the centre portion of the side profiles 2a_si.
• Roof windows of the centre hung type may e.g. allow rotation of the movable frame so that the exterior surface 3su1 of the glass unit may at least partly face the building interior INT during window cleaning/wash.
• the roof window 1 may be of the type configured to be installed in a roof structure having a roof pitch above 17°, such as above 30° relative to horizontal.
• the first projecting glass sheet portion 3p1 overlaps one or more structural bottom profiles 2a_bo, 2b_bo of the frame 2, 2a, 2b.
• the first projecting glass sheet portion 3p1 with the first projecting distance DIS1 so as to both overlap the bottom profile 2a_bo of the movable frame and the bottom profile 2b_bo of the fixation frame.
• the second glass sheet 3b and a part of the evacuated gap 4 also overlaps a part of the bottom frame 3a_bo. This may help to move the edge seal further away from the first frame opening FO1, which may be advantageous as the edge seal 9 material may act as a cold bridge.
• the first projecting distance DIS1 may in embodiments of the present disclosure be at least 6 mm such as 10 mm, such as at least 25 mm, such as at least 40 mm.
• the first projecting distance DIS1 may in embodiments of the present disclosure be at least 40 mm, such as at least 50 mm, such as at least 80 mm, such as at least 100 mm.
• the first projecting distance DIS1 may be no more than 30 mm, such as no more than 25 mm.
• the first projecting distance DIS1 may be no more than 100 mm, such as no more than 80 mm, such as no more than 60 mm.
• the first projecting distance DIS1 may be between 10 mm and 120 mm, such as between 25 mm and 80 mm, such as between 40 mm and 60 mm.
• the first projecting distance DIS1 may be larger than the glass unit 3 thickness, such as wherein said glass unit 3 thickness substantially corresponds to the distance between the exterior major surfaces 3su1, 3su2 of glass unit in a direction perpendicular to a major surface of the exterior glass sheet EGS.
• the major exterior surface 3su2 of the glass unit 3 is configured to abut the interior INT of the building.
• the oppositely directed exterior major surface 3su2 is configured to abut the building exterior EXT.
• the exterior glass sheet EGS, 3a overlaps the full width W1 of the structural bottom profile 2a_bo of the movable frame. This is obtained by a part of the exterior glass sheet EGS placed opposite to the evacuated gap 4, and a further part of the glass sheet that is part of the first projecting glass sheet portion 3p1.
• the exterior glass sheet EGS may not overlap the full width W1 of the structural bottom profile 2a_bo of the movable frame, but may instead only partly overlap the full width W1 of the structural bottom profile 2a_bo (see e.g. fig. 34 ).
• the bottom edge of the second glass sheet 3b, and the bottom edge of the lamination layer are terminated at a location above a surface 2a_S3 of the bottom frame profile 2a_bo that faces the glass unit 3.
• the bottom frame profile 2a_bo comprises a profile surface 2a_S1 that faces and abut/borders the first frame opening FO1 and a second surface 2a_S2 that faces away from the first frame opening FO1 and faces towards the bottom profile 2b_b1 of the fixation frame.
• the profile surface 2a_S1 comprises an outer extremity 2a_S1e which faces the first frame opening FO1.
• a gasket such as a resilient gasket 26 is placed between the frame profile 2a surface 2a_S3 and the glass unit 3. This gasket may abut the outer major surface 3su2 of the glass unit 3 that faces towards the interior INT of the building, In the example of fig. 1 , the further glass sheet 3c comprises this glass sheet surface 3su2.
• the frame profile 2a surface 2a_S3 extends between the profile surfaces 2a_S1 and 2a_S2 and may comprise one or more recesses and/or protrusions for receiving e.g. gaskets, for holding members 13, covers, supports 15, 19 and/or the like.
• the first projecting glass sheet portion 3p1 overlaps the width W2 of the further structural bottom profile 2b_bo.
• the first projecting glass sheet portion 3p1 may partly or fully overlap the further structural bottom profile 2b_bo. In other embodiments, the first projecting glass sheet portion 3p1 may stop/be terminated at a location so that it does not overlap the width W2 of the further structural bottom profile 2b_bo.
• At least one insulating gap in fig. 1 the evacuated gap 4, is arranged between a major surface 3a1 of the exterior glass sheet 3a and a major surface 3b1 of a glass sheet 3b of the vacuum insulated glass unit 3 which is adjacent to the exterior glass sheet EGS of the vacuum insulated glass unit 3.
• the major surface 3a1 faces towards the building interior INT.
• the first projecting glass sheet portion 3p1 overlaps the bottom profile 2b_bo of the fixation frame 2b.
• the roof window may comprise a cladding member 13 for water tightening at the roof window bottom.
• the cladding member 13 comprises a covering part 13b which is configured to provide water tightening at the bottom BO part of the roof window 1.
• the covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit to a position opposite the exterior of the fixation frame so as to overlap a part of the fixation frame 2b.
• the cladding member 13 comprises a connection part 13a.
• the covering part 13b and in some embodiments also at least a part of the connection part 13a may in some embodiments be visible from the outside of the window when the movable frame 2a is in a closed position.
• connection part 13a overlaps the first projecting glass sheet portion 3p1.
• connection part 13a may additionally or instead overlap an extension 18 (the extension 18 is not illustrated in fig. 1 , see figures described further below).
• connection part 13a extends in between the fixation frame 2b and the first projecting glass sheet portion 3p1.
• connection part 13a may be attached to the glass unit 3 and/or the movable frame 2a, e.g. by means of an adhesive and/or by means of one or more mechanical fasteners.
• the covering part 13b moves together (see figs. 2A-2B ) with the movable frame 2a when it is opened.
• connection part 13a is unitary with the covering part 13b.
• the cladding member 13, such as the connection part 13a and/or covering part 13b may comprise or consist of a sheet material, such as a metal sheet material, such as comprising aluminium, iron or steel, or a polymer sheet material.
• the sheet material may comprise one or more bends, welds, soldering and/or the like to shape the cladding member.
• the sheet material may be structurally hard so as to not deform if subjected to outer forces such as e.g. wind, rain, snow or the like.
• the sheet material comprising the cladding member 13 may have a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
• the top cover 24 overlaps the movable frame 2a and/or the glass unit. In fig. 1 , the top cover overlap both the movable frame 2a and a top part of the exterior major surface 3su1 of the vacuum insulated glass unit 3.
• the top cover may e.g. comprise a sheet material, such as a metal sheet material, such as comprising aluminium, iron or steel, or a polymer sheet material.
• the sheet material of the top cover may comprise one or more bends, welding and/or solder provided in order to shape the top cover.
• the top cover 24 is attached to the fixation frame 2b by means of an adhesive and/or one or more mechanical fasteners such as comprising screws, clamps, pop rivets, soldering or welding and/or the like.
• the upper part of the movable frame 2a may move away from the top cover 24 (see also fig. 2B ) when the movable frame 2a is moved to an open position.
• the roof window comprises a step support 15 configured to support the first projecting glass sheet portion 3p1.
• the step support 15 is placed between the first projecting glass sheet portion 3p1 and the frame profile 2a.
• the step support 15 is attached to a bottom profile 2a_bo of the movable frame 2a. This attachment of the step support 15 may be obtained by means of one or more adhesives and/or by means of one or more mechanical fasteners such as pop rivets, clamps, hooks, screws and/or the like (not illustrated in fig. 1 ).
• one or more supports 15 is/are placed between the first projecting glass sheet portion 3p1 and a surface 2b_boa, 2a_boa of one or both bottom profiles 2a_bo, 2b_bo facing the first projecting glass sheet portion 3p1.
• the step support 15 is configured to support the first projecting glass sheet portion 3p1 at least when the movable frame 2a is in a closed position.
• the step support 15 may be configured to support the first projecting glass sheet portion 3p1 also when the movable frame 2a is in an open position.
• the step support 15 transfers impacts acting on the first projecting glass sheet portion to the frame and may hence provide a solution that is less likely to break, e.g. in case of hail storms or if other foreign objects strikes the first projecting glass sheet portion 1b.
• the step support 15 or supports may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more an adhesives and/or mechanical fasteners. This attachment may be provided directly between the step support 15 and the glass sheet portion 3p1, or through one or more intermediate members, such as comprising e.g. an extension support (described in more details later on), a connection part 13a of a cladding member 13 and/or the like.
• connection member 13a and the step support 15 may be different parts.
• connection member 13a extends in between the step support 15 and the projecting glass sheet part 3p1. These parts 13a, 15 may be attached to each other.
• the cladding member 13 and the support or supports 15 for supporting the projecting glass sheet portion 3p1 may be integrated in the same part.
• the cladding member 13 and the step support or supports 15 for supporting the projecting glass sheet portion 3p1 may be a unitary part part.
• Fig. 1 also illustrates (see also figs 2A-2B ) that the movable frame 2a comprises a water protection gasket member 14 that may extend from a position between the cladding member 13 and the exterior glass sheet EGS, and to a position at the bottom profile 2a_bo of the movable frame 2a.
• this gasket 14 extends in between the second outer surface 3su2 of the glass unit 3 and the surface 2a_S3 facing the second outer surface 3su2.
• the gasket 26 that is placed between the glass unit and the frame profile 2a_bo is integrated with the gasket member 14 between the first projecting glass sheet portion and the fixation frame 2b profile 2b_bo.
• the gasket 26 may extend over substantially the full width W1 of the movable frame 2a bottom profile 2a_bo and moreover over a part of or the full width W2 of the fixation frame where it provides gasket member 14.
• the gasket 26 and the gasket member 14 may also be separate gaskets in other embodiments of the present disclosure.
• edge 3a_be, 3a_te, 3a_se, 3b_be, 3b_te, 3b_se, 3c_be, 3c_te, 3c_se, 3d_be, 3d_te, 3d_se) surfaces described above and/or below and/or which are illustrated in the various figured described herein may extend between major surfaces 3a1, 3a2, 3b1, 3b2, 3c1, 3c2, 3d1, 3d2 of the respective glass sheet 3a, 3b, 3c, 3d.
• Figs. 2A-2B illustrates schematically a cross section of a bottom part BO of a roof window 1, such as a centre hung roof window type or a top hung roof window type, according to embodiments of the present disclosure.
• covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit 3, to a position opposite the exterior of the fixation frame so as to overlap a part of the fixation frame 2b. This is when the movable frame 2a is in a closed position POS1. This provides water tightening at the window bottom BO.
• the roof window 1 may comprise a water tightening gasket 28 at the bottom BO, and the covering member 13b may comprise this 28 or engage with it 28 in the closed position POS1.
• This gasket solution 28 may e.g. be arranged between the covering part of the movable frame/unit 2a, and a fixed cladding member 29 that is attached to the fixation frame 2b. See also fig. 37 .
• covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit 3.
• a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit 3.
• the covering part 13b of the cladding member 13 does not longer extend to a position opposite the exterior of the fixation frame 2b.
• the exterior surface 3su1 of the vacuum insulated glass unit 3 may in some embodiments be configured to be arranged above an exterior second plane PL2 defined by a flashing 22 of the roof window 1 and/or defined by the roof structure 50, such as a roofing material 51 (see e.g. fig. 3 ), when the roof window 1 is installed in a roof structure 50 of the building and the movable frame/unit 2a is in a closed position POS1.
• the angle between the second plane PL2 and the first plane PL1 may change when the movable frame 3a is opened.
• the gasket member 14 also extends in between the cladding member 13 of the movable frame 2a and the fixed cladding member 29 of the fixation frame 2b.
• the water protection gasket member in figs. 1-2B also comprises the resilient gasket 26.
• the gasket(s) 14 and/or 26 may be resilient gaskets, such as rubber gaskets, e.g. made from natural and/or synthetic rubber, silicone and/or the like.
• Fig. 3 illustrates schematically a roof window according to embodiments of the present disclosure, installed in a building roof structure 50, seen from the outside.
• the building roof structure 50 comprises a roofing 51.
• the roofing 51 may comprise one or more of roof shingles, roof tiles, roofing felt/asphalt roofing, metal plates, fibre plates corrugated plates and/or the like.
• the roofing/ roofing material 51 acts as the primary, exterior weather shield at the building roof and is subjected to rain, snow, sunlight, hails, wind and/or the like.
• the roofing material 51 may e.g. be attached to a structural roof structure such as roof battens or the like, see e.g. fig. 21 .
• the first projecting glass sheet portion 3p1 here overlaps, in this embodiment, both the bottom profile 2a_bo of the movable frame 2a, and the bottom profile 2b_bo of the fixation frame.
• These bottom profiles 2b_bo, 2a_bo are dashed as they may not be visible from the outside, e.g. due to an enamel (various embodiments hereof are described in more details further below) configured to hide frame components/parts, edge sealings of the glass unit 3 and/or the like so that they are not visible through the glass unit 3 from the outside.
• the roof window 1 has a width direction WD extending between roof window sides SI1, SI2, and a height direction HD, where the height direction extends perpendicular to the width direction WD between window top TO and window bottom BO.
• the roof window may comprise water tightening elongated side water covers 21a, 21b which overlap the major exterior glass sheet EGS surface 3su1 of the vacuum insulated glass unit.
• the roof window in fig. 3 is of the centre hung type.
• the side water covers 21a, 21b in this example therefore comprises first side water covers 21b, comprising lower side water covers, attached to the movable frame 2a and/or insulating glass unit 3.
• first side water covers 21b moves together with it.
• the roof window moreover comprises second side water covers 21a, comprising upper side water covers, attached to a fixation frame 2b of the roof window 1.
• the second side water covers 21a may be fixed to and unmovable relative to, the fixation frame 2b when the movable unit 2a is opened.
• the first and second side water covers 21a, 21b may be arranged in continuation of each other.
• the elongated side water covers 21a, 21b are longitudinal and extends in the height direction HD.
• the elongated side water covers 21a, 21b may overlap a side frame profile 2b_s of the fixation frame 2b.
• the elongated side water covers 21a, 21b may also overlap a side frame profile 2a_si of the movable frame 2a.
• the elongated side water covers 21a, 21b may e.g. be made from or comprise a metal plate, a polymer plate and/or the like that acts as a water cover and may also be resistant in order to act as a shield against outer forces.
• the roof window flashing 22 is arranged to guide e.g. rainwater onto the roofing material 51 of the building roof structure 50.
• Fig. 4 illustrates schematically an embodiment of the present disclosure wherein one or more glass sheets 3a, 3b are arranged between the exterior glass sheet EGS and the lamination layer 3c, 6 and comprises a second projecting glass sheet portion 3p2.
• the second projecting glass sheet portion 3p2 projects beyond the lamination layer 3c, 6.
• the second glass sheet 3b comprising the major surface 3b1 facing the evacuated gap and on which support structures 5 support, is the glass sheet comprising the second projecting glass sheet portion 3p2.
• the second projecting glass sheet portion 3p2 projects beyond a bottom edge 6e of the lamination interlayer 6 at the bottom BO of the roof window.
• this may additionally or alternatively be provided at sides and/or at the top TO of the roof window, so that one or more glass sheets 3a, 3b arranged between the exterior glass sheet EGS and the lamination layer 3c, 6 and comprises a projecting glass sheet portion projecting beyond the lamination layer 3c, 6 at sides and or top TO of the window 1.
• the lamination layer interlayer 6 (6a) and/or the lamination glass sheet 3c may though still be configured to at least partly overlap a bottom frame profile 2a of the frame 2 as illustrated.
• the gasket 26 is placed between the frame profile 2a_bo and the lamination layer 6, 3c.
• the edge seal 9 may not be overlapped by the lamination layer 6, 3c.
• the glass unit may comprise a double step solution where the first projecting glass sheet portion 3p1 projects beyond the edge 3b_be of the second glass sheet 3b, and both the exterior glass sheet EGS and the second glass sheet extends beyond the edge 6e, 3c_be of the lamination layer 6, 3c.
• the glass unit 3 comprises a third glass sheet 3d and a further insulating gap 7 (not illustrated in fig. 4 , various embodiments hereof are described further below), the third glass sheet 3d may or may not project beyond the edge 6e, 3c_be of the lamination layer 6, 3c.
• Fig. 5 illustrates schematically an embodiment of the present disclosure, wherein a gripping member 8a of a mechanical fastening part 8 (one or more 8 may be provided) extends in between glass sheets of the vacuum insulated glass unit 3 so as to provide a fixation of the vacuum insulated glass unit 3 to the frame 2, such as to the movable frame 2a.
• the mechanical fastening part 8 may be made from e.g. metal and/or plastic, and the gripping member 8a may clamp the glass unit 3 to the frame 2a.
• the gripping member 8a extends in between the exterior glass sheet EGS and the lamination glass 3c sheet, and holds onto the lamination glass 3c.
• the one or more mechanical fastening parts 8 are arranged to hold at the bottom of the glass unit at the window bottom BO. Additionally or alternatively, a similar solution may be provided at sides and/or top TO of the window 1.
• the roof window 1 may comprise tightening gaskets 31 configured to provide tightening, such as water- and/or air tightening between the movable frame 2a and fixation frame 2b. These 31 may be resilient and be deflected by one or both frames 2a, 2b when the movable frame 2a is closed.
• Fig. 6 illustrates schematically an embodiment of the present disclosure, wherein the vacuum insulated glass unit 3 comprises a protection sealing 11,
• the protection sealing covers the edge seal 9, such as a solder edge seal, such as a glass solder edge seal or metal solder edge seal, enclosing the evacuated gap 4.
• the first glass sheet 3a such as the first projecting glass sheet portion 3p1 overlaps the protection sealing 11.
• the protection sealing 11 may be a resilient, water tightening sealing.
• the sealing may comprise a butyl sealing, a rubber sealing, a polymer sealing and/or the like.
• the sealing may or may not adhere to one or more surfaces, such as the major surface 3a1 of the first glass sheet 3a that also faces the evacuated gap 4, a surface, such as the edge 3b_be surface of the second glass sheet 3b, a surface of the edge sealing 9 and/or the like.
• the protection sealing 11 protects the edge seal 9 from being exposed to water and may in some embodiment provide a substantially hermetic seal to protect the edge seal 9.
• the first overlapping portion 3p1 may help to provide further protection of the edge seal 9.
• an enamel layer 12 may (not illustrated in fig. 6 , see below, see also fig. 20 ) or may not, be placed between the protection sealing 11 and the glass sheet 3a.
• the protection sealing 11 may in some embodiments e.g. comprise a silicone seal, a butyl seal and/or the like.
• Fig. 7 illustrates schematically an embodiment of the present disclosure, where an enamel layer 12 provides a hiding feature.
• the vacuum insulated glass unit 3 comprises an enamel layer 12, such as an enamel layer 12 which is substantially opaque to at least visible light.
• the enamel layer 12 covers, such as is applied to, a surface 3a1, 3p1s of the exterior glass sheet EGS, which in this embodiment is the first projecting glass sheet 3a.
• the enamel layer 12 may cover, such as be applied to, this glass sheet instead.
• the enamel layer 12 covers a major surface of the first projecting glass sheet portion 3p1.
• that covered surface is part of / comprised in the major surface 3a1, 3d1 of the exterior glass sheet EGS configured to face towards the interior INT of the building when the roof window is installed in a building roof structure 50.
• the enamel may provide a masking.
• the enamel layer 12 may be visible through the exterior glass sheet EGS from the outside/exterior EXT of the roof window 1 but may hide further parts of the roof window as it is opaque.
• the enamel 12 may, in combination with the gasket 26, 14 described above, hide the frame and/or other parts of the roof window when looking though the exterior glass sheet from the exterior EXT of the building.
• the enamel 12 may not cover the full width W1 (see fig. 1 ) of the frame profile of the movable frame 2, but the part of the frame profile 2a_bo that is not covered by the movable frame may be covered by the gasket 26, e.g. as illustrated in fig. 7 or fig. 1-2B .
• a part of the gasket 26 may be visible from the exterior EXT through the glass sheet.
• the enamel 12 and the gasket 26 may have the same colour, e.g. a dark colour such as grey or substantially black.
• the edge seal 9 is 9 is in fig. 7 placed between the enamel layer 12 and the second glass sheet 3b. This may in some embodiments provide that the edge seal 9 abuts the enamel layer 12 and may be fixed thereto. This may e.g. be provided during the VIG unit manufacturing where the enamel may be heated together with the edge seal material to a temperature above the melting point of the edge seal material 9, so that the edge seal material attach with a rigid connection to the enamel 12 material.
• the edge seal 9 material may as previously mentioned comprise solder material providing e.g. a glass solder edge seal or a metal solder edge seal.
• the enamel layer 12 covers a major surface 3p1s of the first projecting glass sheet portion 3p1 so as to hide one or more parts 13, 14, 15, 2a, 2b of the roof widow.
• the enamel layer 12 may cover substantially an entire major surface 3p1s of the first projecting glass sheet portion 3p1.
• the enamel layer 12 may in some embodiments, as illustrated, extend into the evacuated gap 4. In fig. 7 , the enamel layer 12 extends in between the first glass sheet 3a and the edge seal 9. In some further embodiments, one or more support structures 5 may support on the enamel layer 12. In other embodiments, no support structures 5 may support on the enamel layer 12. The enamel layer 12 may only partly, and not fully, overlap the profile 2a width W1 (see W1 in fig. 1 ).
• the frame 2a, 2b and/or other parts 13, 15, 19 of the roof window may be hidden by means of a combination of the enamel layer 12 and a sealing gasket 26.
• the enamel layer 12 may in some embodiments comprise or be made from or comprise a glass material and/or a metal oxide layer. This may be applied during manufacturing of the glass sheet.
• a low-e coating may be removed from the glass sheet surface where the enamel layer is to be placed, prior to applying the enamel 12 material.
• This low-e coating may e.g. be removed by means of laser.
• the enamel layer 12 may be attached to the glass sheet surface already during hardening of the glass sheet if the glass sheet is a thermally tempered glass sheet. This enamel layer may be applied to the glass sheet and heated together with the glass sheet to a temperature above 500°C, such as above 600°C, in the hardening process of providing a thermally tempered glass sheet.
• the enamel layer 12 may have a thickness below 0.15 mm, such as below 0.1 mm, such as below 0.04 mm. in some embodiments, the thickness of the enamel layer may be between 0.001 mm and 0.1 mm, such as between 0.02 mm and 0.05 mm.
• Fig. 8 illustrates schematically an embodiment of the present disclosure, wherein the glass unit 3 comprises one or more low-e coatings 16a.
• the one or more low-e coatings 16a is illustrated by a bold line assigned ref. 16a.
• the one or more low-e coatings 16a is/are arranged at a major surface 3b1 of the second glass sheet 3b facing towards the evacuated insulating gap 4.
• the low-e coating(s) 16a may e.g., in some embodiments, comprise one or more silver layers and/or one or more dielectric layers.
• the low-e coating may be applied to the surface 3b1 that faces towards the exterior EXT of the building, faces the evacuated gap, and faces away from the interior INT of the building when the movable frame 2a (if present) is in a closed position.
• the one or more low-e coatings 16a such as a low-e coating stack, may as illustrated be terminated before the edge seal 9 so as to not extend in between the edge seal 9 and the glass sheet 3b.
• the low-e coating 16a extends in between the support structures 5 and the glass surface 3b1.
• the one or more low-e coatings 16a may be terminated before the edge seal 9 so as to not extend in between the edge seal 9 and the glass sheet 3b.
• the low-e coating 16a extends in between the support structures 5 and the surface 3b1.
• the low-e coating may cover at least 90%, such as 95% or at least 98% of the surface 3b1 part facing the gap 4.
• Fig. 9 illustrates schematically a further embodiment of the present disclosure, relating to a step support 15 for supporting the first projecting glass sheet portion 3p1.
• a step support 15 comprises a support body part 15p which extends to, and is placed opposite to, a position opposite a surface 2b_boa of the bottom profile 2b_bo of the fixation frame facing the first projecting glass sheet portion.
• the step support 15 may provide support over a larger area of the projecting portion 3p1.
• the gasket 14 may in some embodiments extend between the glass sheet portion 3p1 and the bottom frame profile 2b_bo, such as between the step support 15 and the bottom frame profile 2b_bo.
• the step support 15 body is attached to the frame profile 2a_bo of the movable frame 2a and extend therefrom to the placed between the first projecting glass sheet portion 3p1 and a surface of the bottom profile of the fixation frame. 2b_bo facing the first projecting glass sheet portion 3p1.
• the step support 15 may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more adhesives 33 and/or mechanical fastener(s) (not illustrated).
• Fig. 10 illustrates schematically an embodiment of the present disclosure where two supports 15a, 15b are provided.
• a first step support 15a is placed between the projecting portion 3p1 and the surface of the profile 2b_bo of the fixation frame 2b facing the projecting portion 3p1.
• Another step support 15b is placed between the movable frame 2a bottom profile 2a_bo and the projecting portion 3p1.
• the support(s) 15, 15a, 15b may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more adhesives 33 and/or mechanical fastener(s) (not illustrated).
• the adhesive(s) 33 may comprise a tape and/or a glue.
• Fig. 11 illustrates an embodiment where a step support 15 is placed between the fixation frame and the projecting glass sheet portion 3p1, and which does not extend to a position opposite a surface of the frame profile 2a_bo facing the glass sheet.
• Fig. 12 illustrates an embodiment of the present disclosure, wherein one or more of the one or more supports 15, 15a, 15b comprises one or more resilient support elevations 17.
• the resilient support elevations 17 may or may not comprise discretely arranged support elevations.
• the support elevation(s) may be provided by means of an adhesive (see e.g. 33a. 33b of fig. 38 ) adhering the glass sheet portion 3p1 to a step support 15 body, such as a polymer body or metal body, such as comprising aluminium, iron and/or steel.
• the support elevation(s) 17 may additionally or alternatively be provided by or comprise one or more resilient gaskets attached to the step support 15 body.
• This/these gaskets may comprise a rubber material, a silicone material, a butyl material and/or the like.
• the support elevation 17(s) may e.g. act as a damper for damping harming effects of sudden strikes from foreign objects acting on the projecting glass sheet portion 3p1.
• Fig. 12 moreover illustrates an embodiment of the present disclosure where the step support comprises an attachment part 35 which is attached to the bottom profile 2a_bo of the movable frame 2a so that the step support 15 is carried by the profile 2a_bo.
• the step support and the cladding member comprising the covering part 13b are integrated, and the cladding member 13 is thereby also carried by the movable frame 2a.
• Figs. 13-17 illustrates schematically various embodiments of the present disclosure, wherein an extension 18 is arranged in continuation of the bottom of the exterior glass sheet 3a EGS and extends with an extension distance DIS2. See moreover e.g. figs. 31 and 34 an extension 18 according to various embodiments of the present disclosure.
• the extension 18 is arranged opposite to the bottom edge 3a_be of the exterior glass sheet 3a, EGS, and is arranged in in continuation of the exterior glass sheet.
• the exterior surface 18a of the extension 18 may help to provide an impression of a continuous, larger exterior surface 3su1 of the exterior glass sheet EGS surface 3su1.
• the exterior surface 18a of the extension may be substantially flush with the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS which is configured to face away from the interior INT of the building.
• the extension surface 18a may be flush with the surface 3su1 over at least 1 cm, such as at least 3 cm or at least 5 cm from the exterior glass sheet bottom edge 3a_be.
• the extension surface 18a may vary with on more than ⁇ 5 mm, such as no more than ⁇ 3 mm, such as no more than ⁇ 1 mm from the plane over at least 1 cm, such as at least 3 cm or at least 5 cm from the exterior glass sheet bottom edge 3a_be surface.
• the exterior, visible surface 18a of the extension 18 may be arranged with a distance of less than 8 mm, such as less than 5 mm, such as less than 2 mm, from the plane PL1 comprising the exterior major surface 3su1 of the exterior glass sheet EGS of the vacuum insulated glass unit 3.
• the exterior, visible surface 18a of the extension 18 may be substantially flush with the exterior surface 3su1 of the exterior glass sheet EGS, 3a, 3d, at least proximate a bottom edge 3a_be, 3d_be of the exterior glass sheet EGS.
• the exterior, visible surface 18a of the extension 18 is arranged below the plane PL1 comprising the exterior major surface 3su1 of the exterior glass sheet EGS of the vacuum insulated glass unit 3, at least proximate a bottom edge 3a_be, 3d_be of the exterior glass sheet EGS, 3a, 3d. This may be provided in order to reduce or avoid water to be captured at the transition between the extension 18 and the exterior glass sheet.
• the surface 18a may be substantially parallel with the plane PL1. In some embodiments, the surface 18a may vary within ⁇ 5°, such as within ⁇ 3°, such as within ⁇ 1°, relative to the plane PL1 comprising the exterior surface 3su1 of the exterior glass sheet EGS.
• the surface of the extension 18a may be substantially plane. Alternatively, it may comprise a slight, intended curvature, such as a convex curvature in the direction away from the bottom edge of the exterior glass sheet.
• the visible surface 18a of the extension 18 that can be seen from the outside of the building when the movable frame 2a is in a closed position may be provided by a glass sheet, a metal sheet and/or a polymer sheet.
• the extension 18 comprises an extension body 20.
• the extension body 20 provides and/or comprises the exterior surface 18a of the extension 18.
• the extension body 20 is supported by, such as carried by, an extension body support 19.
• the extension body 20 is attached to the extension body support 19.
• the extension body 20 may or may not be structural, such as may or may not contribute to the structural integrity of the extension 18.
• an extension body 20 may comprises one or more functional parts.
• the one or more functional parts may comprise one or more electric circuitries and/or electric components.
• the one or more functional parts may be configured to provide an output such as an electric output, such as measurement and/or sensor output, an electric power supply output and/or the like.
• the extension body 20 may comprise or be a photovoltaic module.
• the photovoltaic module may be configured to charge a rechargeable battery of an actuator (not illustrated) such as a chain actuator or a piston actuator configured to open and/or close the movable frame.
• the actuator may comprise an electric motor for driving a window covering such as a blind or shutter and/or the like.
• the rechargeable battery may additionally supply e.g. radio communication circuitry, data processors and/or the like arranged at the roof window, e.g. in relation to control of the actuator by means of radio signals or the like from a hand held remote control device and/or from a central controller.
• radio communication circuitry e.g. radio communication circuitry, data processors and/or the like arranged at the roof window, e.g. in relation to control of the actuator by means of radio signals or the like from a hand held remote control device and/or from a central controller.
• the extension body 20 may comprise one or more sensors such as comprising a rain sensor, a light sensor, a temperature sensor and/or a humidity sensor.
• the extension body support 19 may be an integrated part of a cladding member 13 as e.g. previously described. Additionally or alternatively, the extension body support 19 may be an integrated part of a step support 15 as e.g. previously described.
• the extension 18 comprises the extension body support 19 which provides a structural, mechanical holding part for holding the extension body 20.
• the extension body support 19 may (as e.g. illustrated in various figures which are described in this document) comprise a wall such as a plate.
• the extension body support 19 may comprise a polymer sheet wall/plate or a metal sheet wall, for example comprising one or more of aluminium, iron or steel.
• the extension body support 19 wall may in some embodiments have a thickness between 0.2 mm and 1.5 mm, such as between 0.2 mm and 1.2 mm, such as between 0.3 mm and 0.9 mm.
• an enamel layer which is substantially opaque to at least visible light may cover, such as be applied to, a surface of the extension body 20. This is however not illustrated.
• the enamel may be substantially identical to the enamel layer 12 as previously described.
• the enamel layer 12 may be placed between the extension body 20 and an extension body support 19.
• the extension body 20 is supported by, such as carried by, a cladding member 13 of the roof window 1 which comprises the extension body support.
• the extension body support 19 is an integrated part of a member, such as a profile, comprising the cladding member 13 and also an integrated part of a step support 15. It is however understood that in some embodiments, one or both of the cladding member 13 and/or step support 15 may be separate to the extension body support 19.
• Fig. 13 moreover illustrates a further embodiment of the present disclosure where the extension body support 19 is attached to the bottom profile 2a_bo of the movable frame 2a so that the extension 18 is supported by the movable frame 2a, such as carried by the movable frame 2a.
• This is in fig. 13 provided by means of one or more fasteners 34 such as mechanical fasteners.
• the extension body support 19 comprises an attachment part 35.
• This attachment part 35 such as a plate and/or a bracket/mounting, is attached to the frame profile 2a_bo by means of the one or more mechanical fasteners 34.
• the one or more mechanical fasteners 34 may comprise one or more of screws, nails, clips, clamps and/or pop rivets.
• the fastener(s) 34 may be releasable so that the extension body support 19 may be detached from and attached to the movable frame 2a one or more times. In some embodiments, the mechanical fasteners(s) 34 may be reused in this process.
• One or more holes, recesses and/or protrusions may be provided in, such as integrated in, the attachment part 35 for receiving and/or providing one or more mechanical fasters.
• the extension body support 19 may comprise one or more installation guides 36.
• the installation guides may enable a user to faster and/or easier install the extension body support 19 precisely at the roof window, such as at the roof window profile.
• the installation guide 36 is integrated in the extension body support 19.
• the installation guide 36 comprises a protrusion for supporting on the bottom profile 2a_bo surface and thereby assure that the user attach the fastener(s) 34 at the correct location.
• Guide 36 may additionally or alternatively be provided in cladding member and/or step support.
• the installation guide 36 may in some embodiments also provide support for supporting the glass unit 3a. This is in fig 13 provided as the extension body support 19 also acts as the step support 15 and supports the first projecting glass sheet portion 3p1.
• Fig. 13 moreover illustrates a further embodiment wherein a sealing 37, such as a silicone material, a butyl material and/or the like is arranged between the bottom edge 3a_be surface of the exterior glass sheet EGS and the extension body 20. This may e.g. prevent water from entering in between the glass sheet EGS and the body 20.
• the sealing 37 may or may not comprise an adhesive feature so as to adhere to the glass sheet EGS and/or the body 20.
• the sealing 37 may or may not abut the body 20 and glass sheet EGS. In fig. 13 , the sealing 37 abuts the extension body 20 and the glass sheet EGS
• Fig. 14 illustrates an embodiment of the present disclosure wherein the extension 18 is supported by, such as mainly carried by, the vacuum insulated glass unit 3.
• the extension 18 is supported by, such as mainly carried by, the first projecting glass sheet portion 3p1.
• This may e.g. be provided by means of an adhesive which adheres the extension 18, such as the extension body 20 support 19, to the first projecting glass sheet portion 3p1 at the side of the first projecting glass sheet portion 3p1 facing towards the building interior INT.
• the extension body 20 support 19 may also comprise a cladding member 13, see e.g. 15.
• the extension 18 may comprises a cladding member 13.
• This cladding member 13 is also described in more details above.
• the cladding member 13 comprises a covering part 13b which is configured to provide water tightening at the bottom BO part of the roof window 1.
• the cladding member 13 may comprise the extension, such as the extension body support 20, or vice versa. I.e. the same member of the roof window may provide several features such as one or more of the cladding member 13, the step support 15 and/or a part 18, 19 of the extension 18.
• Fig. 15 illustrates an embodiment of the present disclosure wherein the extension body 20 is omitted and the extension 18 comprises an extension member 18b provided by a plate/sheet, such as a metal sheet/plate, e.g. comprising one or more of aluminium, iron or steel, and/or a polymer sheet/plate.
• the member 18b is arranged in continuation of the external glass sheet EGS bottom 3a_bo and provides the extension surface 18a.
• This surface 18a may or may not be substantially flush with the exterior glass sheet surface 2su1
• This plate/sheet 18b comprises the exterior surface 18a of the extension.
• the exterior surface 18a may be provided by a painting layer, an enamel layer and/or the like applied at the plate/sheet.
• Fig. 16 illustrates an embodiment of the present disclosure wherein the extension is attached to the exterior glass sheet 3b surface 3su2 of the glass unit 3 that away from the building exterior EXT and facing away from the exterior glass sheet EGS.
• This surface 3su2 may e.g. be provided by means of the second glass sheet 3b, a lamination glass sheet 3c (not illustrated in fig. 16 ) or a further glass sheet of the glass unit 3, see e.g. ref. 3d described in more details further below.
• the extension member 18b is supported by, such as carried by, the glass unit 3.
• the attachment of the extension member 18b to the glass unit 3 may e.g. be provided by means of an adhesive connection.
• a solution as illustrated in one or more of figs. 14-16 may be combined with an extension body 20 as previously described, so that the extension body 20 is supported by the glass unit 3 through the extension member 15b, whereby the extension member 18b provides the extension body support 19.
• the extension member 18b may comprise or provide the cladding member 13 comprising a covering part 13b as e.g. previously described
• Fig. 16 moreover illustrates an embodiment of the present disclosure, wherein the extension 18 is substantially unsupported by the exterior glass sheet EGS. Instead another glass sheet of the glass unit 3 supports the extension, in this case glass sheet 3b.
• Fig. 17 illustrates an embodiment of the present disclosure, wherein the extension 18 is substantially unsupported by the glass unit 3.
• the extension 18 comprises an attachment part 35 and the extension member 18b.
• the extension 18 is attached to the movable frame 2a, e.g. as described above in relation to fig 13 by means of the attachment part 35.
• one or more fasteners 34 may attach the attachment part 35, and thereby the extension 18, to the to the movable frame 2a profile 2a_bo.
• Fig. 17 illustrates a further embodiment of the present disclosure, wherein the extension member 18b comprises an installation guide 36.
• the installation guide 36 is configured to extend into an indentation, such as a groove or slit, in the bottom profile 2a_bo.
• This indentation, such as groove or slit, is in fig. 17 provided in the profile 2a_bo surface 2a_bos2 facing away from the first frame opening FO1.
• the indentation may be arranged at another location.
• the installation guide 36 may be configured to engage with one or more barbs (not illustrated) of e.g. the profile 2a_bo.
• the one or more barbs may help to hold the member comprising the guide 36 in place while attaching and/or manipulating the one or more fasteners 34.
• one or more installation guides such as indentation(s), e.g. comprising groves, slits and/or holes, protrusions and/or the like may be arranged at the frame profile 2a and/or at the attachment part 35. This/these is/are configured to assist the user in attaching the extension member 18b as intended to the frame profile and and/or may provide structural strength.
• the extension 18, such as the extension body 20 or extension member 18b overlaps the further structural bottom profile 2b_bo of the fixation frame 2b. This may help to provide water tightening and/or provide aesthetical advantages, e.g. by causing the impression of a larger, exterior surface 3su1 and/or a more aesthetically well integrated extension.
• the exterior surface 18a of the extension 18 may be substantially identical and/or substantially visually identical to the exterior surface 3su1 of the first projecting glass sheet portion 3p1.
• the extension body 20, such as a detachable/replaceable extension body 20, or the extension member 18b comprises the surface 18a.
• the extension body 20 may comprise a glass sheet and/or an exterior glass sheet surface 18a.
• the surface 18a may be a high gloss surface that may be obtained by a glass sheet of the extension body 20, so that the surface 18a reminds of, resembles and/or is substantially similar to, the surface characteristic of the exterior surface 3su1.
• such a high gloss surface 18a may also be obtained by a paint, enamel or the like applied onto the extension member 18b, if the extension body 20 is omitted.
• the surface 18a may not remind of the surface characteristic of the exterior surface 3su1 of the exterior glass sheet EGS.
• the exterior extension surface 18a may still be substantially flush with the surface 3su1 of the exterior glass sheet EGS.
• the exterior extension surface 18a is generally visible from the outside EXT of the window 1.
• first projecting distance DIS1 may be no more than 100 mm, such as no more than 60 mm, such as no more than 30 mm, such as no more than 25 mm.
• the distance DIS 1 may be at least 6 mm such as at least 10 mm, such as at least 45 mm.
• the first projecting distance DIS1 may be no more than 55 mm, such as no more than 45 mm, such as no more than 30 mm.
• the extension distance DIS2 as e.g. illustrated in figs 13-17 may be at least 6 mm, such as at least 10 mm, such as at least 20 mm or at least 50 mm.
• the extension distance DIS2 may be no more than 300 mm, such as no more than 200 mm, such as no more than 80 mm or no more than 40 mm.
• the sum DIS1+DIS2 of the extension distance DIS2 and the first projecting distance DIS1 may be at least 20 mm, such as at least 30 mm, such as at least 60 mm or at least 75 mm.
• the sum DIS1+DIS2 of the extension distance DIS2 and the first projecting distance DIS1 may be between 35 mm and 400 mm, such as between 45 mm and 250 mm, such as between 55 mm and 120 mm.
• the extension distance DIS2 may in some embodiments of the present disclosure be larger than the first projecting distance DIS1. In some further embodiments hereof, the extension distance DIS2 may be at least 20% larger, such as at least 50% larger, such as at least 100% larger than the first projecting distance DIS1. In some embodiments the extension distance DIS2 may be between 20% and 200% larger than the first projecting distance DIS1, such as between 50% and 100% larger than the first projecting distance DIS1.
• the extension distance DIS2 may be smaller than or substantially equal to the first projecting distance DIS1.
• the distance DIS1 and/or DIS2 as described above and/or below may extend substantially in the height direction HD (see e.g. fig. 3 and 33 ) of the roof window 1.
• the distance DIS1 and/or DIS2 as described above may extend substantially parallel to the longitudinal direction (between top and bottom of glass unit) of the side edges 3a_se, 3b_se of the glass sheets of the vacuum insulated glass unit (see e.g. fig. 18 and 33 ) of the roof window 1.
• the extension member 18b illustrated in e.g. figs. 15-17 is provided by a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate.
• the extension member 18b comprises the visible extension surface 18a facing away from the building interior INT and which is subjected to weather such as rain and sunlight when the roof window is installed in the building roof structure 50.
• the extension member 18b is structural so as to provide or support the structural integrity of the extension 18.
• the extension 18 may comprise an elongated, structural profile 19, 18b, such as a metal profile, providing the structural integrity of the extension 18.
• the elongated, structural profile 13, 15, 19, 18b may comprises a metal sheet having a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
• the part 19, 18b, such as the structural part, of the extension comprising the visible surface 18a of the extension that can be seen from the outside of the building when the movable frame 2a is in a closed position may comprise one or more of a glass sheet, a metal sheet and/or a polymer sheet.
• Fig. 18 illustrates an embodiment of the present disclosure wherein the exterior glass sheet EGS, in this case glass sheet 3a, comprises one or more third projecting glass sheet portions 3p3 which projects beyond a side edge 3b_se of the adjacent glass sheet 3b with a second projecting distance DIS3.
• the exterior glass sheet EGS in this case glass sheet 3a, comprises one or more third projecting glass sheet portions 3p3 which projects beyond a side edge 3b_se of the adjacent glass sheet 3b with a second projecting distance DIS3.
• This in fig. 18 the case at both sides SI1, SI2 of the roof window 1.
• the glass unit 3 including a part of the evacuated gap 4, overlaps both side profiles 2a_si of the movable frame 2a placed at opposite sides of the first frame opening FO1.
• the side edge 3b_se is however terminated before the side edge 3a_se of the exterior glass sheet EGS, 3a is terminated, so that the side of the exterior glass sheet projects with the distance DIS3 beyond the second glass sheet edge 3b_se at the roof window 1 sides SI.
• the second projecting distance DIS3 may in embodiments of the present disclosure be at least 5 mm, such as at least 10 mm, such as at least 25 mm, such as at least 40 mm.
• the second projecting distance DIS3 may be no more than 30 mm, such as no more than 25 mm.
• the second projecting distance DIS3 is smaller than the first projecting distance DIS1 at the roof window bottom BO.
• the second projecting distance DIS3 is substantially corresponding to, or larger than, the first projecting distance DIS1 at the roof window bottom BO.
• the exterior glass sheet EGS may in some embodiments be of a width that is smaller than the minimum frame opening FO2 width of the second frame opening FO2 to allow the glass unit 3 to move through the fixation frame 2b in between the side profiles 2b_si of the fixation frame 2b. If the roof window 1 is of the top hung type, and not centre hung, the exterior glass sheet EGS width may in some embodiments be larger than the second frame opening FO2 width. In that case, one or more glass sheets 2a, 2b, such as at least the exterior glass sheet EGS, may overlap the fixation frame side profiles 2b_si.
• only a part of the third projecting glass sheet portions 3p3 may overlap the fixation frame side profile(s) 2b_si, whereas one, more or all of the evacuated gap 4, edge sealing 9 and/or second glass sheet 3b may not overlap the fixation frame 2b side profiles 2b_si.
• Fig. 18 moreover illustrates the embodiments of elongated side water covers 21a, 21b as previously described. These 21a, 21b overlap the exterior glass sheet EGS surface 3su1.
• the side water covers 21a, 21b, in fig. 18 are configured to guide water into a side water channel 38,
• the side water channel 38 is arranged above the projecting portion 3p3 so as to cover a part of that portion 3p3.
• the side water channel 38 may be attached to the glass unit 3, such as to the exterior glass sheet. This attachment may be provided by means of an adhesive and/or mechanical fasteners (not illustrated)
• a first side edge surface 39a of the water covers 21a extends partly towards and/or into (as e.g. illustrated) the side water channel 38 so as to guide water from the cover 21a into the channel 38.
• Side water channels 38 are arranged at each roof window side SI1, SI2.
• the side water covers 21a, 21b also comprises a further side edge surface 39b that guides the water towards the roof structure and away from the glass unit.
• the side water channel(s) 38 may be U-shaped and comprise an elongated recessed portion for guiding water from the side cover(s) 21a, 21b towards the roof window 1 bottom BO.
• the side water channel(s) 38 may e.g. comprise a metal sheet material such as an aluminium or steel sheet material.
• the side water covers 21a, 21b hence overlap the glass unit 3 and the fixation frame side profiles 2b_si in the width direction WD of the roof window 1.
• the projecting portions 3p3 at a side SI of the roof window are present. In other embodiments of the present disclosure, the projecting portions 3p3 may be omitted.
• one or more of the edge(s) of the vacuum insulated glass unit 3 arranged along the top TO, bottom BO and/or side(s) SI1, SI2 of the roof window 1 may be insulated by means of edge heat insulation (not illustrated in fig. 18 , see e.g. figs 44-47 ) that is arranged opposite to, such as abuts, the edge region of the VIG unit.
• the edge heat insulation comprises a heat insulating material having a thermal conductivity below 0.1 W mK , such as below 0.05 W mK , such as below 0.02 W mK . In one or more embodiments of the present disclosure, the edge heat insulation comprises a heat insulating material having a thermal conductivity between 0.009 W mK and 0.1 W mK , such as between 0.01 W mK and 0.05 W mK , such as between 0.015 W mK and 0.04 W mK .
• the edge heat insulation may overlap an edge surface of one or more glass sheets if the VIG unit, wherein said edge surface extends between major surfaces of the respective glass sheet.
• the edge heat insulation extends to overlap one or more major exterior glass sheet surfaces to a position opposite the evacuated gap, so that the evacuated gap overlaps the heat insulation. This may help to further reduce cold bridge issues.
• the edge heat insulation extends to a position between a frame profile of the movable frame and the vacuum insulated glass unit.
• the edge heat insulation is configured to reduce heat transfer at the area of the edge seal enclosing the evacuated gap when compared to a scenario where the heat insulation is omitted.
• the edge heat insulation extends from an edge seal, which encloses the further insulating gap, and to a frame profile of the frame. This may provide improved heat insulation.
• the edge heat insulation may enclose and/or encapsulate the edge of the VIG unit.
• the edge heat insulation may be configured so as to reduce heat transfer at the area of the edge seal 9 enclosing the evacuated gap 4 when compared to a scenario where the edge heat insulation is omitted.
• Fig. 19 illustrates schematically an embodiment of the present disclosure, wherein the exterior glass sheet EGS is smaller than the adjacent glass sheet at the roof window top TO.
• the glass sheet 3b adjacent to the exterior glass sheet 3a EGS comprises a fourth projecting glass sheet portion 3p4.
• This fourth projecting glass sheet portion 3p2 projects beyond the edge 3a_te of the exterior glass sheet 3a, EGS at the top TO of the roof window. This causes a step at the top of the glass sheet.
• a water channel 43 may in some embodiments be arranged at said step and. In other embodiments, such a water channel 43 may be omitted.
• a protection sealing 11 may be arranged to cover the edge seal 9 enclosing the evacuated gap 4, and this 11 may be arranged at the step.
• the exterior glass sheet does not overlap the edge sealing protection sealing 11.
• the edge sealing protection sealing 11 may be arranged between the glass sheets EGS, 3b enclosing the evacuated gap 4 to protect the edge seal 9, see e.g. fig. 20 .
• the top cover 24 of the window 1 may overlap the exterior major surface 3su1 and comprise a covering part comprising a covering surface 24a for guiding water towards the exterior glass sheet surface 3su1.This covering part may extend towards the glass sheet surface 3su1.
• a top gasket 23, such as a resilient top gasket 23, may provide water tightening at the top TO between the top cover 24 and the glass unit 3.
• the top gasket 23, such as a rubber or silicone gasket, may be configured to deflect when the movable frame 2a is moved to the closed position (see e.g. fig. 2A ).
• the movable frame 2a is in the closed position.
• the top gasket 23 comprises lips that abuts the water channel 43 walls.
• it 23 may comprise one or more lips or parts that abut a glass unit 3 surface such as the exterior surface 3su1.
• the gasket 23 may e.g. be attached to/fixated to the top cover 24. See also fig. 25 .
• the top cover 24 may comprise a sheet material, such as a metal or polymer sheet material for providing a hard exterior surface/shell of the roof window 1 for mechanical protection and water protection.
• the top cover 24 may be attached to or integrated in the top frame profile 2b_to of the fixation frame 2b.
• the handle 27 comprises a base part 27a extending between the top profile of the fixation frame 2b_to, and the top profile of the movable frame 2a_to. This 27a may be manipulated by means of the gripping part 27b of the handle 27, such as pivoted (not illustrated), to unlock the movable frame from the fixation frame 2b and/or to open the window.
• Fig. 20 illustrates schematically a roof window 1 according to embodiments of the present disclosure, where the glass unit 3 comprises a protection sealing 11. See also fig. 6 .
• the protection sealing 11 covers the edge seal 9 that hermetically encloses the evacuated gap 4.
• the protection sealing 11 is placed between major surfaces 3a1, 3b1 of the first and second glass sheet 3a, 3b.
• the protection sealing 11 may e.g. be or comprise a resilient, water tightening sealing, e.g. a butyl sealing 11 , a rubber or silicone sealing 11 and/or the like.
• an enamel layer 12 as previously described may be placed between the protection sealing 11 and the glass sheet 3a. This may e.g. be relevant if the outermost glass sheet 3a that provides a part of the enclosing of the evacuated gap 4 is the exterior glass sheet EGS, which is the case in several embodiments described above, see e.g. figs. 1-2B and other figures described above.
• Fig. 21 illustrates schematically an embodiment of the present disclosure, wherein the exterior surface 3su1 of the vacuum insulated glass unit 3 facing the exterior of the building EXT is configured to be arranged below an exterior plane PL2 defined by/comprising a flashing 22 and/or a roof structure when the roof window 1 is installed in a roof structure 50 of the building.
• the second plane PL2 is defined by the defined by the exterior of the roofing material 51 (see e.g. fig. 3 ) and the roof slope. Flashing at the roof window bottom extends over the exterior of the roofing 51 surface 51a so as to guide rain water from the roof window and to the exterior surface 51a of the roofing 51.
• the roofing 51 may be attached to a structural roof structure such as comprising roof battens 52.
• the exterior surface 3su1 may be configured to substantially be arranged in/coincide with the exterior plane PL2.
• a cladding member 13 may extend over a part of the fixation frame 2b through one or both planes PL1, PL2, and may comprise a covering part 13b that covers an outer surface of the fixation frame 2b, so as to guide rain water towards the flashing 22 and/or roofing material 51 (see fig. 3 ).
• the cladding 13 may help to guide rain water from the exterior glass sheet surface 3su1, over the fixation frame 2b and towards the roof structure.
• the cladding member is in fig. 21 attached to the glass sheet surface 3a1 of the exterior glass sheet 3b facing towards the interior INT of the building.
• a seal 46 may be provided to provide water tightness between the cladding member 13 and the glass unit 3.
• the cladding member 13 may be attached in other ways to the movable frame 2a, such as to the glass unit, e.g. to the exterior glass sheet EGS surface 3su1.
• the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS is comprised in a first plane PL1.
• the first plane PL1 is configured to substantially coincide with or be arranged below (as illustrated) a second, exterior plane PL2 defined by a flashing 22 and/or roof structure (51) of the roof window 1 when the roof window is installed in a roof structure (50) of the building.
• the first plane PL1 and the second plane PL2 may be configured to be substantially parallel, such as at least when the movable frame 2a of the roof window is in a closed position.
• the planes may be arranged with a mutual angle of less than 5°, such as less than 3° or less than 1°.
• the first plane PL1 and the second plane PL2 may in some embodiments substantially coincide or be arranged so that the surface 3su1 and the roofing material 51 appears to be substantially flush or aligned.
• the glass unit / vacuum insulated glass unit 3 may comprise just one insulating gap 4 (the evacuated gap) arranged between exterior major surfaces 3su1, 3su2 of the glass unit 3.
• Such a vacuum insulated glass unit 3 may have a U g ( U glazing ) value of below 0.8 W /( m 2 K ) , such as below 0.6 W /( m 2 K ) , such as below 0.5 W /( m 2 K ) .
• the U g ( U glazing ) value of such a unit 3 may be between 0.35-0.7 W /( m 2 K ) , such as between 0.4-0.6 W /( m 2 K ) .
• the U g value may be determined at the centre of the glass unit 3 (excluding projecting glass sheets as described in this document). E.g. the U g value may be determined at a center portion of the evacuated gap arranged where two diagonally extending lines, which extends between diagonally arranged corner portions of the edge seal
• the vacuum insulated glass unit 3 may comprise a third glass sheet 3d, wherein a a further insulating gap 7 is placed between a first major surface 3d1 of the third glass sheet 3d facing the further insulating gap 7 and a major surface 3b2, 3a2 of a glass sheet 3b, 3a of the vacuum insulated glass unit 3, which major surface faces the further insulating gap 7.
• a further heat insulating 7 gap are e.g. illustrated in figs. 22 and 26-32 .
• Fig. 22 illustrates an embodiments of the present disclosure wherein the vacuum insulated glass unit 3 comprises a third glass sheet 3d and a further insulating gap 7.
• the further insulating gap 7 is placed between a first major surface 3d1 of the third glass sheet 3d, where the surface 3d1 faces the further insulating gap 7, and a major surface 3b2 of another glass sheet of the vacuum insulated glass unit 3 which faces the further insulating gap 7.
• the major surface 3b2 of the other glass sheet 3b, 3a of the vacuum insulated glass unit 3 which faces the further insulating gap 7 is a second major surface 3b2 of the second glass sheet 3b which faces away from the evacuated gap 4.
• the evacuated gap 4 provides the outermost heat insulating gap of the glass unit that placed nearest to the exterior EXT of the building.
• the evacuated gap 4 is placed between the exterior glass sheet EGS and the further insulating gap 7.
• the further insulating gap 7 is the innermost gap placed nearest to the interior INT of the building.
• the second glass sheet 3b is placed between the evacuated gap 4 and the further insulating gap 7.
• Major, oppositely directed surfaces of the second glass sheet 3b may thus face and e.g. abut (including low-e coating if present) the further insulating gap 7 and the evacuated gap 4, respectively.
• the edge seal 7a may comprise a primary seal and a secondary seal (not illustrated).
• the primary seal may be placed more proximate the gap 7a than the secondary seal.
• the seal 7a enclosing the further insulating gap 7 may comprise one or more of (not illustrated):
• the edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a below 0.6 W mK such as below 0.4 W mK .
• the edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a below 0.1 W mK such as below 0.05 W mK , such as below 0.02 W mK .
• the edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a between 0 , 009 W mK and 0.6 W mK , such as between 0.05 W mK and 0.4 W mK .
• the further insulating gap 7 is placed between the lamination layer 6, 3c and the evacuated gap 4.
• the further insulating gap 7 may be a gas filled gap 7, such as a gap 7 comprising argon gas.
• the third glass sheet 3d is arranged between the second glass sheet 3b and a lamination layer 6, 3c, such as comprising an interlayer 6, of the lamination layer 6, 3c.
• a lamination layer 6, comprising the lamination interlayer, may be attached to a major surface 3d2 of the third glass sheet 3d.
• one or more low-e coatings 16b is/are arranged at the first major surface 3d1 of the third glass sheet 3d and facing the further gap 7.
• This low-e 16b coating may (as illustrated) or may not, extend to a position between the edge seal 7a and the glass sheet surface 3d on which it is applied.
• this surface may also comprise one or more coatings, such as low-e coatings applied thereon, if present.
• one or more further low-e coatings 16a may additionally or alternatively be arranged in the evacuated gap 4, such as at the surface of the second glass sheet 3b facing the evacuated gap 4.
• the first projecting glass sheet portion 3p1 may project beyond the bottom edge 3d_be of the third glass sheet 3d with the distance DIS1.
• the glass unit 3 in fig. 22 and some of the figures described below, comprising both an evacuated insulating gap 4 and a further gas filled gap 7 may be referred to as a hybrid VIG unit.
• the bottom edges of the glass sheets 3b, 3d, 3c are substantially aligned so that the firs projecting glass sheet portion extends beyond all three bottom edges, In other embodiments, the bottom edges of the glass sheets 3b, 3d, 3c may be displaced relative to each other so that one or more of the glass sheets 3b, 3d, 3c extends/projects beyond the bottom edge of one or more of the other two glass sheets.
• Fig. 23 illustrates an embodiment of the present disclosure, wherein the cladding member 13 comprises a shield 13a, such as comprising a connection part 13a, which overlaps the exterior major surface 3su1 of the first projecting glass sheet portion 3p1 configured to face away from the building interior INT and towards the exterior EXT of the building.
• the shield 13a such as the connection part 13a, may be supported by, such as attached 13c to, the exterior major surface 3su1, 3a2 of the first projecting glass sheet portion 3p1 configured to face away from the building interior INT.
• the connection part 13a may e.g. be attached to the surface 3su1 by means of one or more adhesives 13c.
• one or more mechanical means may attach the cladding 13 so that the shield 13a overlaps and protects a part of the projecting portion 3p1.
• the shield 13a may extend e.g. at least 10 mm, such as at least 20 mm or at least 30 mm over the exterior surface 3su1 of the projecting portion 3p1 from the bottom edge 3a_be of the glass sheet EGS.
• the shield 13a may (not illustrated) or may not (illustrated in fig. 23 ) extend over the full extend of the first projecting distance DIS1. In fig. 23 , the shield 13a extend over about half of the distance DIS1.
• the shield 13a may extend over at least 10%, such as at least 30% or at least 60% of the distance DIS1 from the bottom edge 3a_be.
• connection part 13a may be unitary with the covering part 13b.
• the cladding member 13, such as the shield 13a, may provide mechanical shielding of the first projecting glass sheet portion 3p1. Hence, when hails or the like strikes the projecting glass sheet portion 3p1, it may protect at least a part of the projecting glass sheet portion 3p1.
• Fig. 23a illustrates an embodiment of the present disclosure where not the entire shield 13a is attached to the surface 3su1.
• the shield 13a extends in over the first projecting glass sheet member 3p1, and a sub part of the shield 13a is attached to the surface 3su1 by means of one or more adhesives 13c, in this case at a position distant to the bottom edge 3a_be of the exterior glass sheet EGS.
• a part of the shield 13a extending from the location of the adhesive 13c and to the covering part 13b extends over the surface 3su1 with a distance to the surface 3su1. This part of the shield is unattached to the surface 3su1 and an air gap is present between the shield 13a and the surface 3su1.
• the adhesive and/or a seal 13c may provide water tightening preventing water entering in between the glass sheet EGS and the shield 13a.
• This water tightening may be provided along substantially the entire length of the shield in a direction parallel to the extent of the bottom edge 3a_be of the exterior glass sheet between glass sheet corners.
• Fig. 24 illustrates schematically an embodiment of the present disclosure wherein a mechanical holding member 19a, 19b secures the exterior glass sheet EGS at the bottom BO, according to one or more embodiments of the present disclosure.
• the holding member 19a, 19b is part of an extension body support 19, (see also one or more of figs. 13-17 ).
• One or more mechanical holding members 19a, 19b may be provided. This/these 19a, 19b is/are configured to secure the exterior glass sheet (3a, 3d, EGS) at the bottom thereof.
• the mechanical holding member 19a, 19b comprises a wall 19a placed opposite to the bottom edge 3a_be of the exterior glass sheet EGS - in the illustrated example glass sheet 3a.
• the mechanical holding member may in some further embodiments may comprise a hook part 19b, such as a clamping part, extending from the wall 19a to a position opposite to the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS, 3a at the window bottom BO.
• the hook part 19b and/or wall 19a is configured to secure the exterior glass sheet 3a, EGS at the frame 2, in this case to the movable frame 2a.
• the hook part 19 may e.g. provide securing of the glass unit to the frame.
• the hook part 19b may provide a safer solution in more extreme situations where wind or other forces provides that the vacuum insulated glass unit is pushed or pulled in a direction away from the exterior surface of the vacuum insulated glass unit which faces the exterior of the building, It may provide safety in case of fire and/or the like.
• the holding member 19a, 19b e.g. comprising the hook part, may also be used for clamping the glass unit towards the frame 2a.
• the mechanical holding member 19a, 19b may comprise or be made from metal such as comprising one or more of aluminium, iron or steel. In other embodiments, it may be made from a polymer.
• the wall 19a and(or holding member may in some embodiments have a thickness between 0.2 mm and 1.5 mm, such as between 0.2 mm and 1.2 mm, such as between 0.3 mm and 0.9 mm.
• the bottom edge 3a_be, 3d_be (see e.g. also figs. 28 and 31 , respectively) of the exterior glass sheet 3a, 3d, EGS may be placed at a first side of a holding wall 19a of the mechanical holding member, and the extension 18, such as comprising the extension body 20, may be placed at the opposite side of the holding wall 19a.
• Fig. 24 illustrates a further embodiment of the present disclosure wherein the thickness of the extension body 20 is lower/smaller than the thickness of the exterior glass sheet.
• the extension body support 19 may hence extend from a position opposite to the bottom edge 3a_be of the exterior glass sheet EGS. This may be provided since the structural strength of the extension body support 19 may be of less importance and/or since the another material than the exterior glass sheet EGS may be used for the extension body 20.
• the extension body 20 may be or comprise a sheet, such as a glass sheet, having a thickness that is at least 10%, such as at least 25% or at least 40% lower than the thickness of the exterior glass sheet EGS and the first projecting glass sheet portion p1s thereof.
• the extension body 20 may have a thickness, such that is identical to the thickness of the exterior glass sheet EGS or larger than the thickness of the exterior glass sheet. This may be accommodated by means of the extension body support, e.g. in order to enable providing that the exterior extension surface 18a is substantially flush with the plane PL1 of the exterior glass sheet EGS surface 3su1.
• Fig. 25 illustrates a further embodiment of the present disclosure, wherein the exterior glass sheet EGS comprises a fifth projecting glass sheet portion 3p5 at the top TO of the roof window 1.
• the fifth projecting glass sheet portion 3p5 projects beyond a top edge 3b_te of the adjacent glass sheet 3b, 3a.
• the fifth projecting glass sheet portion 3p5 may project beyond the top edge 3b_te of the adjacent glass sheet, in this case sheet 3b, with a third projecting distance DIS4.
• This projecting distance DIS4 may in some embodiments be less than 60 mm, such as less than 40 mm, such as less than 30 mm.
• the third projecting distance DIS4 may be larger than 10 mm, such as larger than 20 mm, such as less than 30 mm.
• the third projecting distance DIS4 may be between 10 mm and 60 mm, such as between 20 mm and 40 mm, such as between 25 mm and 35 mm.
• the fifth projecting glass sheet portion 3p5 may in some embodiments project beyond the top edge of all other glass sheets of the glass unit 3.
• Fig. 25 illustrates a further embodiment of the present disclosure, wherein a gasket 23 of the roof window comprises one or more parts 23a, 23b, such as one or more gasket lips, which support on the first glass sheet 3a.
• the one or more gasket parts 23a, 23b may support directly or indirectly on the on the fourth projecting glass sheet portion 3p5.
• the one or more gasket parts 23a, 23b abuts the exterior surface 3a2 of the exterior glass sheet EGS at the fourth projecting glass sheet portion 3p5.
• the exterior glass sheet EGS may comprise one, more or all of the first projecting glass sheet portion 3p1, the third projecting glass sheet portion 3p3 (see e.g. fig. 18 ) and/or the fourth projecting glass sheet portion 3p5.
• the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 and the third projecting glass sheet portion 3p3.
• the exterior glass sheet may substantially not extend beyond the top edge of the adjacent glass sheet at the top TO.
• the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 at bottom BO and the fifth projecting glass sheet portion 3p5 at top TO.
• the exterior glass sheet EGS may substantially not extend beyond side edges of the adjacent glass sheet at the roof window sides SI1, SI2.
• the exterior glass sheet EGS may comprise both the first projecting glass sheet portion 3p1 (see e.g. figs 1-2B and/or other figs described above), the third projecting glass sheet portion 3p3 (see fig. 18 ) at sides SI1, SI2 and the fifth projecting glass sheet portion 3p5 at the top, see e.g. fig. 25 .
• the exterior glass sheet projects beyond edges of one or more, such as all, glass sheets, or at least the adjacent glass sheet, of the glass unit 3.
• the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 whereas the projecting portion(s) 3p3 at sides and at top 3p5 may be substantially omitted.
• Fig. 26 illustrates schematically an embodiment of the present disclosure, wherein the evacuated gap 4 overlaps an edge seal 7a which encloses the further insulating gap 7 such as a gas filled/containing gap 7.
• the evacuated gap 4 fully overlaps the width of the edge seal 7a enclosing the further insulating gap 7.
• the evacuated gap 4 may only partly overlap the width of the edge seal 7a enclosing the further insulating gap 7, so that the edge seal 9 enclosing the evacuated gap 4 is arranged opposite to the edge seal 7a enclosing the further insulating gap.
• an enamel 12 is arranged at the surface of the exterior glass sheet EGS that faces towards the interior of the building INT and the evacuated gap 4.
• Fig. 27 illustrates schematically an embodiment of the present disclosure, wherein the further insulating gap 7 overlaps the edge seal 9 enclosing the evacuated gap 4.
• the further insulating gap 7 fully overlaps the edge seal 9 whereas the edge seal 7a enclosing the further insulating gap 7 is arranged opposite to a protection sealing 11, such as a protection sealing 11 as previously described for protecting the edge seal 9.
• the edge seal 9, such as a solder glass or solder metal edge seal, may act as a cold bridge, and providing that the evacuated gap 4 overlaps the edge seal 7a of the further insulating gap 7, and/or providing that the further insulating gap 7 overlaps the edge seal 9 (see e.g. figs. 26 or 27 ) may provide reduced heat transfer at the edge region(s) of the of the glass unit 3 thereby reducing negative effects of the cold bride at the seal 9.
• Fig. 27 illustrates a further embodiment of the present disclosure, wherein an enamel layer 12 (such as an enamel layer 12 described above) covers a part of the evacuated gap 4 and the further insulating gap 7 at the roof window bottom BO.
• an enamel layer 12 such as an enamel layer 12 described above
• Fig. 28 illustrates schematically a further embodiment of the present disclosure, wherein a gripping member 8a extends in between glass sheets of a glass unit comprising both the evacuated gap 4 and a further insulated gap 7 as e.g. previously described. This is provided at the roof window bottom BO.
• the gripping member 8a extends in between the third glass sheet 3d and the second glass sheet 3b. As the third glass sheet in fig. 28 is proximate the building interior INT the gripping member 8a extends to hold on the surface 3d1 of the third glass sheet 3d which face the further insulating gap 7. The part of the edge seal 7a enclosing the further insulating gap 7 is displaced away from the bottom edge 3d_be of the third glass sheet and the bottom edge of the second glass sheet 3b_be so as to provide a space for the gripping member 8a to extend into to grab the glass sheet 3d.
• the lamination layer 6 and the glass sheet 3c may provide further structural strength and provide a stronger holding solution as the lamination layer 6 is attached to the glass sheet which the gripping member 8a engages with.
• an adhesive and/or a resilient part may be paced between the gripping member 8a and the glass sheet with which it 8a engages.
• Fig. 28 illustrates a further embodiment of the present disclosure where the same member comprises both the gripping member 8a and a part of an extension 18 as described according to various embodiments above.
• the member comprising the gripping part 8a may additionally or alternatively comprise the cladding 13 (not illustrated in fig. 28 ) and moreover even the covering part 13b of the cladding 13, according to e.g. embodiments described above.
• the member comprising the gripping part 8a may additionally comprise a mechanical holding member 19a, 19b, such as comprising a holding wall 19a, and/or a hook part 19b, which is configured to secure the exterior glass sheet 3a, 3d, EGS at the bottom thereof.
• a mechanical holding member 19a, 19b such as comprising a holding wall 19a, and/or a hook part 19b, which is configured to secure the exterior glass sheet 3a, 3d, EGS at the bottom thereof.
• Embodiments of such holding member is described above in relation to e.g. fig. 24 .
• Fig. 28 moreover illustrates an embodiment of the present disclosure wherein an extension body 20 (such as a body 20 as previously described) is replaceably arranged at an extension body support 19.
• an extension body 20 such as a body 20 as previously described
• it 20 may be attached to the extension body support 19 by means of one or more fasteners 25a, 25b, such as mechanical fasteners.
• the fastener comprises one or more adjustable parts 25b, such as a screw,.
• This adjustable part 25b may be manipulated in order to e.g. enable removal a the extension body 20 in order to e.g. replace this 20 with a another extension body.
• This replacing of the extension body may e.g. be provided to
• the adjustable part 25b may in some embodiments press the extension body 20 towards a wall 25b (in this embodiment the wall 25b is comprised in the member comprising the extension body support 19), and thereby secure it and/or maintain it in place.
• one or more of the one or more fasteners 25a, 25b may comprise one or more of one or more clips, one or more clamps, one or more pop rivets, one or more spring loaded holding members, one or more screws, one or more fixed walls 25a and/or the like.
• the extension body 20 may additionally or alternatively comprise a holding interface (such as comprising e.g. one or more recesses or protrusions) configured to engage with the one or more fasteners 25a, 25b.
• a holding interface such as comprising e.g. one or more recesses or protrusions
• the one or more fasteners 25a, 25b may in some embodiments be adjustable in order to enable receiving/holding extension bodies 20 of different thicknesses, design and/or the like, and still provide adjustment features enabling that the extension body 20 surface 18a may be adjusted to be substantially flush with the surface 3su1 after installation.
• Fig. 28 illustrates a still further embodiment of the present disclosure, wherein the extension 18 comprises an enamel layer 12.
• This layer 12 may be attached to or integrated in the extension body 20 or may be attached to the extension body support 19.
• the extension body 20 may comprise the enamel layer 12, and the enamel layer may be visible through the surface 18a of the extension body 20 from the exterior EXT.
• the enamel 12 of the extension may be similar to an enamel layer 12 covering a part of the first projecting glass sheet portion 3p1 as e.g. previously described.
• Figs. 29-31 illustrates schematically various embodiments of the present disclosure, wherein the further insulating gap 7, such as a gas filled gap, is the gap of the vacuum insulated glass unit 3 that is configured to be placed proximate the building exterior EXT.
• the third glass sheet 3d is the exterior glass sheet EGS and comprises the first projecting glass sheet portion 3p1.
• the evacuated gap 4 is in figs. 29-31 placed between the further insulating gap 7 and a lamination layer 6, 3c, between glass sheets 3a, 3b.
• the evacuated gap 4 is in figs. 29-31 the insulating gap of the two insulating gaps 4, 7 of the glass unit 3 that is placed proximate the building interior when the movable frame 2a is in a closed position.
• a gripping member 8a as e.g. described above extends in between the exterior glass sheet EGS, 3d, and the first glass sheet 3a, which is placed adjacent to the exterior glass sheet EGS.
• the further insulating gap 7 is placed between the exterior glass sheet and the first glass sheet.
• the first and second glass sheets 3a, 3b enclosing the evacuated gap 4, (and optionally also the lamination layer 6, 3c) may be placed between the gripping member 8a and the bottom profile 2a_bo of the movable frame 2a.
• the gripping member 8a may be a part, such as an integrated part, of a member 8 that is attached to the movable frame 2a by means of e.g. one or more mechanical fasteners 34, for example as described above in relation to e.g. fig. 13 and/or fig. 17 .
• the member 8 and/or the profile 2a_bo may also comprise a guide 36 (not illustrated in fig. 29 ) as e.g. described above, such as in relation to e.g. fig. 13 and/or fig. 17 .
• the guide may be omitted.
• Figs. 28-29 moreover illustrates embodiments of the present disclosure wherein the edge seal 9 which encloses the evacuated gap 4 overlaps an edge seal 7a which encloses the further insulating gap 7.
• the edge seal 9 which encloses the evacuated gap 4 overlaps an edge seal 7a which encloses the further insulating gap 7.
• it 9 partly overlaps the edge seal 7a whereas in fig. 29 , it 9 fully overlaps the edge seal 7a.
• Fig. 30 illustrates schematically an embodiment of the present disclosure, where the roof window 1 comprises a glass unit 3 comprising the evacuated gap 4 and the further insulating gap 7.
• the further gap 7 overlaps the edge seal 9 enclosing the evacuated gap 4.
• the further gap 7 moreover extends beyond the bottom edge 3b_be of the second glass sheet 3b which comprises the surface 3b1 that faces the evacuated gap 4 and provides a part of the enclosing of the evacuated gap 4.
• the second glass sheet 3b is placed closer to the building interior INT than the first glass sheet 3a.
• the first glass sheet 3a is placed between the exterior glass sheet EGS and the second glass sheet 3b.
• the second glass sheet 2a is placed between the lamination layer 6, 3a and the evacuated gap 4.
• the evacuated gap 4 is placed between the first glass sheet 3a and the second glass sheet 3b.
• Exterior glass sheet EGS which in fig. 30 is the third class sheet 3d, comprises the first projecting glass sheet portion 3p1 that projects beyond the bottom edge 3b_be of the second glass sheet 3b.
• the first glass sheet 3a also comprises a projecting glass sheet portion that projects beyond the bottom edge 3b_be of the second glass sheet 3b.
• the first glass sheet 3a may project beyond the bottom edge 3b_be of the second glass sheet 3b with a distance substantially corresponding to the distance DIS1 with which the exterior glass sheet EGS projects beyond the bottom edge 2b_bo of the second glass sheet.
• both the first glass sheet 3a and the exterior glass sheet EGS (third glass sheet) 3d extends beyond the bottom edge 3b_be of the second glass sheet 3b.
• the bottom edge of the second glass sheet 3b may project beyond the lamination layer 6, 3c.
• the further insulated (e.g. gas filled) gap 7 may project at least 10 mm, such as at least 20 mm, such as at least 30 mm or at least 40 mm beyond the bottom edge 3b_be of the second glass sheet.
• the further insulated (e.g. gas filled) gap 7 may project between 10 mm and 200 mm, such as between 20 and 100 mm, such as between 25 mm and 50 mm beyond the bottom edge 3b_be of the second glass sheet.
• the further insulated (e.g. gas filled) gap 7 may project no more than 30 mm, such as no more than 25 mm beyond the bottom edge 3b_be of the second glass sheet.
• the evacuated gap 4 may as illustrated, in some embodiments overlap the movable frame bottom profile.
• the evacuated gap 4 may however in some embodiments not overlap the full width (see W1 in fig. 1 ) of the bottom profile 2a_bo. In other embodiments, the evacuated gap 4 may overlap the full width (see W1 in fig. 1 ) of the bottom profile 2a_bo, see
• the further gap 7 overlaps the full width (see e.g. W1 of fig. 1 ) of the bottom frame profile 2a_bo of the movable frame 2a, and projects beyond the surface side of the profile 2a_bo that faces away from the first frame opening FO1.
• the further insulating gap 7 may extend to a position opposite the fixation frame bottom profile 2b_bo. In other embodiments, the gap 7 may not extend to a position opposite the fixation frame bottom profile 2b_bo.
• the first projecting glass sheet portion 3p1 of the exterior glass sheet EGS which provides a part of the enclosing of the further insulating gap 7, does not project beyond the bottom edge 3a_be of the first glass sheet 3a.
• the first glass sheet provides both a part of the enclosing of both the evacuated gap 4 and the further insulating gap 7, and is placed between the further insulating gap 7 and the evacuated gap 4.
• the first projecting glass sheet portion 3p1 may however project beyond the bottom edge 3a_be of the first glass sheet 3a, see fig. 39 .
• Fig. 30 moreover illustrates an embodiment of the present disclosure, wherein an enamel layer 12 is arranged at the major surface of the exterior glass sheet EGS which faces the further insulating gap 7.
• Fig. 30 moreover illustrates a further embodiment of the present disclosure, wherein a cladding member 13 comprising a covering part 13b is provided.
• the cladding member 13 may in embodiments be provided as e.g. described above, e.g. in relation to varios embodiments of the present disclosure.
• the cladding member 13 comprises a connection part 13a, which overlaps the exterior major surface 3su1 of the exterior glass sheet EGS that is configured to face away from the building interior INT and towards the exterior EXT of the building.
• the connection part 13a may be attached to the glass unit surface 3su1 by means of one or more adhesives 13c, see also description relating to figs. 23-23a .
• Fig. 31 illustrates schematically an embodiment of a roof window, wherein the further insulating gap 7 is placed proximate the building exterior EXT.
• the third glass sheet 3d is the exterior glass sheet EGS and comprises the first projecting glass sheet portion 3p1.
• the evacuated gap 4 is placed between the further insulating gap 7 and a lamination layer 6, 3c.
• the first projecting glass sheet portion 3p1 extends beyond both the bottom edge 3a_be of the first glass sheet 3a and the bottom edge 3b_be of the second glass sheet 3b.
• the first glass sheet 3a is placed between the exterior glass sheet EGS and the second glass sheet 3b.
• the second glass sheet 2a is placed between the lamination layer 6, 3a and the evacuated gap 4.
• the evacuated gap 4 is placed between the first glass sheet 3a and the second glass sheet 3b.
• Fig. 31 illustrates a further embodiment of the present disclosure, wherein an extension 18 provided.
• the extension 18 comprises an extension body 20 and an extension body support 19 e.g. as described according to various embodiments.
• the extension 18 may generally comprise one or more of the features as described above, for example as described in relation to one or more of figs. 13-17 , 24 and/or 28 . Hence, in some embodiments, the extension body 20 may be omitted. See e.g. fig. 15, 16 or 17 . The extension 18 is arranged in continuation of the exterior glass sheet EGS, 3d. The extension body 20 may e.g. be replaceable as for example described above in relation to fig. 28 .
• Fig. 32 illustrates schematically an embodiment of the present disclosure wherein the exterior glass sheet EGS is displaced towards the bottom BO of the roof window to provide the first projecting glass sheet portion 3p1.
• the second glass sheet 3b projects beyond the top edge 3a_te of the exterior glass sheet EGS, e.g. as described in relation to fig. 19 .
• the exterior glass sheet EGS may be longer than the second glass sheet 3b and have a top edge 3a_te that either is substantially flush with the top edge 3b_te of the second glass sheet 3b (indicated in fig. 1 ) or extends beyond the top edge 3b_te of the second glass sheet, e.g. as described in relation to fig. 25 .
• Fig. 33 illustrates schematically a roof window according to embodiments of the present disclosure, installed in a building roof structure 50, seen from the outside. See also description above relating to e.g. fig. 3 .
• the roof window comprises an extension 18 at the roof window 1 bottom BO as e.g. described in relation to various embodiments described above.
• the extension comprises an extension body 20, but in other embodiments, an extension member 18b as e.g. illustrated in figs 15, 16 or 17 may be provided instead.
• the hook part 19b and holding wall 19a are visible in fig. 33 . See e.g. description relating to one or more of figs. 24 , 28 or 31 . Also fasteners 25a for holing the extension body 20 are illustrated.
• the extension body support 19 described above may comprise the hook part 19b and holding wall 19a and/or the fastener 20a.
• two hook parts 19b and fasteners 25a are illustrated as being discretely arranged at the holding wall along the width direction WD of the roof window 1. More or less than two hook parts 19b and/or fasteners 25a may be provided in other embodiments.
• a single elongated hook part 19b and/or fastener 25a may be provided and extend along at least 80%, at least 90% or substantially along the full width of the glass unit 3, in the width direction.
• Dash-dotted line referred to as 2a indicates the surface of the bottom profile 2a_bo of the movable frame that faces and abuts the first frame opening
• dashed line referred to with 3b_be indicates the bottom edge of the second glass sheet 3b beyond which the first projecting glass sheet portion 3p1 projects.
• Fig. 34 illustrates schematically an embodiment of the present disclosure wherein the first projecting glass sheet portion 3p1 does not extend beyond the surface 2a_bos2 of the bottom profile 2a_bo of the movable frame 2a that faces the fixation frame 2b. Instead, an extension 18 as e.g. preciously described, in relation to one or more of figs 13-17 , 24 , 28 and/or 31 provides an overlap of the fixation frame 2b.
• Fig. 34 moreover illustrates an embodiment of the present disclosure wherein the extension body support 19 comprises a recessed portion into which the extension body 20 extends. Also at the bottom of the extension body 20, a wall of the extension body support 19 extends to a position opposite a bottom edge of the body 20, which bottom edge is arranged distant to the bottom edge of the exterior glass sheet EGS. The covering part 13b of the cladding 13 extends from a position opposite or proximate the bottom part of the extension body 20.
• Fig. 35 illustrates a vacuum insulated glass unit 3 according to embodiments of the present disclosure, seen towards the exterior surface 3su1.
• the roof window 1 frame is omitted to improve understanding.
• the first projecting glass sheet portion 3p1 is indicated in fig. 35 .
• the enamel 12 overlaps the edge seal 9 enclosing the evacuated gap 4 (see e.g. fig. 1 ). However, the enamel 12 may as illustrated be terminated before reaching a support structure 5 so that no support structure supports on the enamel 12. In other embodiments, support structures 5 may support on the enamel 12.
• the enamel 12 is indicated by dash-dotted hatch lines in fig. 35 .
• the enamel 12 extends from the bottom edge 3a_be of the exterior glass sheet EGS and covers substantially the entire surface of the projecting glass sheet portion 3p1 from the bottom edge 3a _ be.
• the glass unit / vacuum insulated glass unit 3 may comprise just one insulating gap 4 (the evacuated gap) arranged between exterior major surfaces 3su1, 3su2 of the glass unit 3.
• a singe gap 4 vacuum insulated glass unit 3 may have a U g ( U glazing ) value of below 0.8 W /( m 2 K ) , such as below 0.6 W /( m 2 K ) , such as below 0.5 W /( m 2 K ) .
• the U g ( U glazing ) value of such a singe gap 4 unit 3 may be between 0.35-0.7 W /( m 2 K ) , such as between 0.4-0.6 W /( m 2 K ) .
• the glass unit / vacuum insulated glass unit 3 may comprise the evacuated gap 4 and a further insulating gap such as a gas filled gap 7, such as a gap 7 containing argon.
• a vacuum insulated glass unit 3 comprising the gaps 7, 4 may have a U g ( U glazing ) value of below 0.5 W /( m 2 K ) , such as below 0.4 W /( m 2 K ) , such as below 0.3 W /( m 2 K ) .
• the U g ( U glazing ) value of such a unit 3 may be between 0.2-0.5 W /( m 2 K ) , such as between 0.25-0.4 W /( m 2 K ) .
• the U g value may be determined at the centre portion CEGU of the glass unit 3,
• the centre portion CEGU of the glass unit 3 may be the location of the evacuated gap arranged where two diagonally extending lines 49a, 49b, which extends between diagonally arranged corner portions of the edge seal 9, intersect.
• Fig. 36 illustrates an embodiment of the present disclosure, wherein the step support 15 comprises a mechanical holding member 19a, 19b.
• the mechanical holding member comprises a holding wall 19a, 19b, which is configured to secure the exterior glass sheet 3a, EGS at the bottom thereof.
• the mechanical holding member comprises a wall (19a) placed opposite to, such as next to, the bottom edge 3a_be exterior glass sheet 3a, EGS.
• the mechanical holding member may moreover comprise a hook part 19b extending to a position opposite to the exterior major surface 3a2, 3su1of the exterior glass sheet EGS, 3a. See e.g. also refs. 19a-19b described above in relation to various embodiments of the present disclosure.
• the step support 15 comprises a member that is attached to the movable frame 2a bottom profile, e.g. by means of one or more mechanical fasteners 34 as e.g. described above.
• the step support 15 also comprises the cladding 13 comprising the covering part 13b.
• the step support and the cladding member 13 are in fig. 36 integrated in the same member.
• the glass unit 3, including the first projecting glass sheet portion 3p1 as described above and/or below according to various embodiments of the present disclosure may extend over the entire width W1 (see fig. 1 ) of the bottom profile 2a_bo, and over at least 20%, such as over at least 50%, such as over at least 80% or over at least 90% of the width W2 (see fig. 1 ) of the bottom profile 2b_bo of the fixation frame 2b.
• Fig. 37 illustrates schematically and in perspective a roof window 1 according to embodiments of the present disclosure.
• the roof window is of the centre hung type
• the movable frame 2a is configured to move, such as pivot, relative to the fixation frame 2b by means of one or more hinges 60
• the vacuum insulated glass unit 3 is attached to the movable frame 2a and is configured to move together with the movable frame 2a.
• Fig. 37 moreover illustrates a fixation frame according to embodiments of the present disclosure, comprising a longitudinal, structural top profile 2b_to, a longitudinal, structural bottom profile 2b_bo, and two longitudinal, structural side profiles 2b_si.
• the longitudinal directions of the top and bottom profiles are parallel.
• the longitudinal directions of the side profiles are parallel.
• the longitudinal direction of the side profiles of the fixation frame 2b are substantially perpendicular to the longitudinal directions of the top and bottom profiles of the fixation frame.
• Fig. 37 moreover illustrates a movable frame 2a according to embodiments of the present disclosure, comprising a longitudinal, structural top profile 2a_to, a longitudinal, structural bottom profile 2a_bo, and two longitudinal, structural side profiles 2a_si.
• the longitudinal directions of the top and bottom profiles are parallel.
• the longitudinal directions of the side profiles are parallel.
• the longitudinal direction of the side profiles of the movable frame 2a are substantially perpendicular to the longitudinal directions of the top and bottom profiles of the movable frame 2a.
• Hinges 60 interconnects the side profiles 2a_bo, 2b_bo and provides a rotation axis RAX that may be substantially horizontal.
• the rotation axis RAX is arranged between the top and bottom profiles and is substantially parallel to the longitudinal direction of these profiles.
• the centre hung roof window in fig. 37 may in some embodiments be top hung.
• the hinges 60 may comprise, or be connected, to arms extending to a top hinge (not illustrated) arranged at the roof window top TO.
• the centre hung roof window in fig. 37 may not be top hung.
• Fig. 38 illustrates schematically a bottom BO part of a roof window according to embodiments of the present disclosure.
• a step support 15 as e.g. described above, is provided.
• the step support 15 comprises an attachment part 35 as e.g. described previously.
• This attachment part 35 such as a plate and/or a bracket/mounting, is attached to the frame profile 2a_bo by means of the one or more mechanical fasteners 34.
• This attachment is provided at the surface 2a_bos2 side of the bottom frame profile 2a_bo of the movable frame 2a that faces the fixation frame bottom profile 2b_bo and faces away from the first frame opening FO1.
• Fig. 38 moreover illustrates an embodiment of the present disclosure, wherein the step support in fig. 38 is a plate member 15 that is attached by means of adhesive 33a, 33b to the first projecting glass sheet portion 3p1. This may in some embodiments be provide by means of a first adhesive type 33a and a second adhesive type 33b.
• two adhesives of the second adhesive type 33b is placed between two adhesives of the first adhesive type 34a. It is understood that in other embodiments, more or less than two of the first adhesive type 33a may be used. It is also understood that in some embodiments, more or less than two of the second adhesive type 33b may be used.
• the first adhesive type 33a may be or comprise a glue
• the second adhesive type 33b may be or comprise an adhesive tape.
• the second adhesive type 33b may be or comprise a glue
• the first adhesive type 33b may be or comprise a glue
• both adhesives 33a, 33b may comprise a tape or a glue.
• the adhesive(s) 33a, 33b may or may not provide support elevations 17 as described above.
• combination of a tape and a glue may be provided as the first and second adhesive typers 33a, 33b.
• the glue may be the primary adhesive, and may be used even though it has a longer curing time. While it cures, the tape may provide initial sufficient (and in some cases secondary) attachment.
• no mechanical holding means extend to hold on the exterior glass sheet EGS and/or another glass sheet at the bottom. In other embodiments of the present disclosure, as e.g. illustrated in one or more of figs.
• mechanical holding 8, 8a, 19a, 19b may additionally or alternatively be provided at the bottom part of the glass unit 3 so as to mechanically fixate the glass unit 3a to the movable frame 2a.
• Such mechanical holding means may also be integrated in the member 13a, 15.
• Fig. 38 illustrates a still further embodiment wherein the covering part 13b of the cladding extends through the second plane PL2 that comprises the exterior of the roofing material 51.
• the step support 15 configured to support the first projecting glass sheet portion 3p1 comprises a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate, e.g. an aluminium sheet, at steel sheet or the like.
• the plate/sheet of the step support 15 may in some embodiments have a thickness between 0.2 mm and 1.5 mm, such as between 0.2 mm and 1.2 mm, such as between 0.3 mm and 0.9 mm. This may provide sufficient support of the portion 3p1.
• the member, such as a profile member, comprising the step support 15 may e.g. comprise one or more bends in order to provide a desired cross sectional shape of the member.
• the one or more bends may e.g. shape the plate/sheet provide one or more of
• the member comprising one or more of the above may e.g. be shaped by roller shaping, by extrusion and/or pultrusion and/or the like.
• Fig. 39 illustrates schematically an embodiment of the present disclosure, wherein the glass unit comprises an evacuated gap 4 and a further insulating gap 7, such as a gas filled gap, as e.g. described above.
• the further gap 7 is a gas filled insulating gap, and is placed closer to the exterior EXT than the evacuated gap 4, when the movable frame is in a closed position.
• the exterior glass sheet EGS is hence provided by the third glass sheet 3d that comprises the major surface 3d1 facing the further gap, and comprises the surface that provides the major exterior glass unit 3 surface 3su1 that faces the exterior EXT.
• the glass unit comprises an evacuated gap 4 and a further insulating gap 7, such as a gas filled gap, as e.g. described above.
• the further gap 7 is a gas filled insulating gap, and is placed closer to the exterior EXT than the evacuated gap 4, when the movable frame is in a closed position.
• the exterior glass sheet EGS is hence provided by the third glass sheet 3d that
• the distance DIS1 with which the exterior glass sheet EGS projects beyond the bottom edge 3b_be of the second glass sheet 3b is larger than the distance with which the first glass sheet 3a projects beyond the bottom edge 3b_be of the second glass sheet 3b.
• Both the first projecting glass sheet portion 3p1 of the third (exterior EGS) glass sheets 3d and the first glass sheet 3a extends beyond the bottom edge 3b_be of the second glass sheet 3b.
• the first projecting glass sheet portion 3p1 moreover projects beyond the edge seal 7a enclosing the further insulating gap.
• the first glass sheet 3a providing a part of the enclosing of the evacuated gap 4 may not project beyond the bottom edge 3b_be of the second glass sheet 3b that provides a part of the enclosing of the evacuated gap 4 and is placed at the other side of the evacuated gap 4.
• insulating gap 7 may fully (as illustrated), or partly (not illustrated in fig. 38 ), overlap the edge seal 9a enclosing the evacuated gap 4.
• the cladding member 13 may comprise a connection part 13a which extends in between the first projecting glass sheet portion 3p1 and a bottom frame profile 2b_bo of the fixation frame 2b.
• the connection part 13a may here comprise a part, such as a bracket or plate that is fixated to the glass unit.
• it 13a may be attached to a surface of the first projecting glass sheet portion 3p1 that faces the building interior and/or a profile 2b_bo of the fixation frame, or may be attached to another glass sheet of the glass unit.
• fig. 15 or 16 may be attached to another glass sheet of the glass unit.
• connection part 13a may comprise a part, such as a bracket or plate, that is fixated directly or indirectly to the movable frame 2a (see e.g. fig. 12, 13 or 17 or 34 ), such as to the bottom frame profile 2a_bo, by means of one or more fasteners, such as one or more mechanical fasteners 34.
• An installation guide 36 may or may not be provided.
• step support (s) 15, 15a, 15 and projection 18 are described above according to various embodiments of the present disclosure.
• the same member such as an elongated profile, may comprise one, more than one, or all of:
• the same member comprises both step support 15, extension 18 and cladding.
• the same member comprises extension 18 and cladding 13, but not a step support 15.
• the same member may or may not comprise both the/a cladding member 13 comprising the covering part 13b and one or more or more step support(s) 15, 15a, 15b.
• the cladding member 13 and the step support 15 may or may not be unitary parts of the same member.
• the cladding 13 may be attached to the glass unit 3 at an exterior major surface 3su1 or an interior major surface of a glass sheet 3a, 3d, 3b, 3c, see e.g. fig.
• the support(s) 15, 15a, 15b may be attached to a profile 2a_bo of the movable frame, e.g. by means of an attachment part 35 and an adhesive and/or mechanical fastener(s) 34.
• the same member may comprise none of, or one or both of, the cladding member 13, 13b and one or more or more step support(s) 15, 15a, 15b. If the same member comprises the extension 18 and one or both of the covering part 13b of the cladding and the step support(s), one or both of these 13,, 15, 15a, 15b may or may not be unitary parts of the member.
• one or both of the cladding member 13 and/or step support 15 may be separate to the extension body support 19.
• the frame 2 may comprise a movable frame 2a and a fixation frame 2b.
• the movable frame 2a may be omitted, and hence, the frame may alone comprise a fixation frame being attached to a building roof structure.
• the glass unit 3 may be unmovable when installed in the building roof structure.
• the total surface area of a major surface 3a1, 3a2, 3d1, 3d2 of the exterior glass sheet EGS, 3a, 3d may be larger than the total surface area 3b1, 3b2, 3a1, 3a2, 3d1, 3d2 of one or more other glass sheets 3a, 3b, 3d, such as the adjacent glass sheet 3a, 3b, 3d. This may e.g. be provided due to one or more of the projecting glass sheet portions 3p1, 3p3, 3p5 of the exterior glass sheets as e.g. described above.
• the projection distances DIS1, DIS3, DIS4 described above may represent a projection length of the respective glass sheet relative to an edge of another glass sheet of the glass unit 3.
• the projection distances/lengths described above may be measured/determined in a direction that is parallel to a plane PL1 of a major glass sheet surface, and in a direction that is perpendicular to the longitudinal direction of the edge beyond which the respective projecting glass sheet portion extends.
• the distance/length of the projecting glass sheet portion may be determined as e.g. illustrated in one or more figures described above, see e.g. examples in figs. 1 , 13-18 , 23-25 , 28-31 , 34 , 38-39 .
• the extension distance DIS2 may in a similar way represent an extension 18 length, see e.g. figs 13-17 .
• the projection distances DIS1, DIS3, DIS4 may extend to and terminate at the respective glass sheet edge of the projecting glass sheet portion.
• the projection distance/length DIS1 terminates at the glass sheet bottom 3a edge 3a_be.
• the extension distance/length DIS2 terminates at the edge of the extension body that is distant to the bottom edge of the exterior glass sheet EGS.
• the projection distance/length DIS3 terminates at the side edge 3a_se of the exterior glass sheet EGS.
• the projection distance/length DIS4 terminates at the top edge 3a_te of the exterior glass sheet EGS.
• Fig. 40 illustrates a bottom part of a roof window 1 according to further embodiments of the present disclosure, where the glass sheet 3b of the insulated glass unit 3 that is adjacent to the further glass sheet (also called lamination glass sheet) 3c of the insulated glass unit 3 comprises an extending glass sheet portion 3p2. This extending glass portion 3p2 projects beyond an edge 3c_be of the further glass sheet 3c with a distance DIS5.
• the further glass sheet 3c comprises an overlapping part 3c_op.
• This overlapping part 3c_op of the further glass sheet 3c comprises the edge 3c_be which the extending glass portion 3p2 projects beyond.
• the overlapping part 3c_op of the further glass sheet 3c overlaps a frame profile 2a_bo of the frame 2.
• the overlapped frame profile is a frame profile 2a_bo of the movable frame, and the overlapping part 3c_op extends in over the frame profile from the frame opening to a position opposite the frame profile.
• the overlapping part 3c_op of the further glass sheet 3c may in some embodiments overlap substantially the entire width of the frame profile 2a_bo.
• the overlapping part 3c_op of the further glass sheet 3c may overlap at least 20%, such as at least 50%, such as at least 90% of the maximum width W1 (See W1 in fig 1 ) of the profile 2a_bo. In some embodiments, however, the overlapping part 3c_op of the further glass sheet 3c may overlap less than 95%, such as less than 70% of the profile 2a_bo width.
• the distance DIS5 with which the extending glass sheet portion 3p2 projects beyond the edge 3c_be of the further glass sheet 3c may be at least 10 mm, such as at least 20 mm, such as at least 50 mm. In some embodiments of the present disclosure, the distance DIS5 with which the extending glass sheet portion 3p2 projects beyond the edge 3c_be of the further glass sheet (3c) may be between 10 mm and 200 mm, such as between 20 mm and 150 mm, such as between 5 mm and 150 mm. The distance DIS5 with which the extending glass sheet portion 3p2 projects beyond the edge 3c_be of the further glass sheet 3c may or may not vary at different sides SI1, SI2, BO, TO of the roof window.
• the extending glass sheet portion 3p2 overlaps both the bottom profile 2a_bo of the movable frame 2a, and also overlaps at least a part of a bottom profile 2b_bo of the fixation frame that is arranged opposite the surface 2a_bos2 of the movable frame 2a that faces away from the frame opening FO1 of the movable frame. This may be relevant in roof windows of the top hung type as well as of the centre hung type.
• the exterior glass sheet EGS may partly or fully overlap the full width of the structural bottom profile 2b_bo of the fixation frame. As can be seen, the exterior glass sheet EGS, 3a may overlap a part of the fixation frame 2b profile 2b_bo that is arranged opposite the surface 2a_bos2 of the profile 2a_bo of the movable frame 2a. , In fig. 40 , the exterior glass overlaps the full width of the bottom profile 2b_bo.
• the insulating gap 4 or gaps of the insulated glass unit 3 may partly or fully overlap the full width of the profile 2a_bo of the movable frame. Additionally in further embodiments, the insulating gap or gaps may as illustrated overlap a part of the fixation frame 2b profile 2b_bo that is arranged opposite the surface 2a_bos2 of the profile 2a_bo of the movable frame 2a.
• the insulating gap or gaps of the insulated glass unit 3 may thus in some embodiments overlap the entire width W1 of the profile 2a_bo of the movable frame, and as illustrated in e.g. fig. 4 further project beyond the frame profile 2a_bo of the movable frame 2a.
• the overlapping part 3c_op of the further glass sheet 3c and the lamination interlayer 6 overlaps the profile 2a_bo of the movable frame 2a at the bottom BO (and/or at sides SI1, SI2 and/or at the top TO - not illustrated in fig. 40 ) of the roof window. This provides safety in case that the glass unit 3 breaks.
• an adhesive 83 attaches the overlapping part 3c_op of the further glass sheet 3c directly or indirectly to the movable frame 2a.
• the lamination interlayer 6 which is attached to the overlapping part 3c_op of the further glass sheet 3c helps to hold the glass unit 3 remains at the roof window so that no harmful glass unit pieces falls towards the floor in the building interior.
• the gasket 26 may e.g. provide insulation and/or tightening.
• the gasket 26 may be omitted and the adhesive or adhesives 83 may be visible from the interior of the building. In that case, the adhesive 83 may be arranged at the location of the gasket 26 closer to the frame opening FO1.
• connection part 13a which overlaps the extending glass sheet portion 3p2.
• the connection part 13a is attached to the extending glass sheet portion 3p2 by means of one or more adhesives 33a, 33b, e.g. as previously described, see for example fig. 38 .
• the connection part 13a is attached to the movable frame, e.g. as described above in relation to one or more figures by means of the attachment part 35.
• the attachment part may ( Fig. 40 ) or may not ( fig. 41 - described below) be unitary with the connection part 13a.
• One or more fasteners 34 may attach the attachment part 35, and thereby the connection part 13a, to the to the frame profile 2a_bo of the movable frame 2a.
• connection 13a may in some embodiments, as illustrated in fig. 40 , be part of a cladding member comprising a covering part 13b. In other embodiments, if a cladding member is present, the covering part 13b may be provided by means of another member. In fig. 40 , the covering part 13b and the connection part 13b are unitary. The covering part which is as previously described configured to provide water tightening at the bottom part of the roof window.
• the lamination interlayer 6 may be a lamination interlayer of a type as e.g. previously described.
• the of the lamination interlayer 6 may be of the sound dampening type, also called an acoustic lamination interlayer.
• Such an acoustic lamination interlayer may be obtained by using one or more sheets of acoustic lamination interlayer material.
• the sheet or sheets of lamination interlayer material may be made from multiple sub-sheets, such as e.g. three or more sub-sheets, such as four or more sub-sheets.
• the sub-sheets are stacked and may or may not be bonded together prior to the lamination process to obtain a laminated insulated glass unit.
• the sub-sheets have different characteristics. For example, one or more of the sub-sheets, such as a middle sheet of the sub-sheets, may have a glass transition temperature of lower degrees than sub-sheets arranged at each side of that middle layer.
• Fig. 41 illustrates a bottom part BO of a roof window 1 according to further embodiments of the present disclosure.
• the roof window in fig. 41 has many features in common with the roof window illustrated in fig. 40 .
• the plane PL1 may, when the roof window 1 is installed at a roof structure and the movable frame 4a is in a closed position, be arranged with an angle above e.g. 17°, such as above 25° relative to horizontal, for example as illustrated in fig. 40 .
• the attachment part(s) 35 is/are however (contrary to the attachment part illustrated in fig. 40 ) not unitary with the connection part 13a. Instead, the one or more attachment parts 35 mechanically engages with the connection part 13a by means of an engagement member 82a.
• the engagement member 82a is a part of the attachment part 35 and may as illustrated comprise a hook part that extends into an opening 82b of the connection part 13a and thereby engages with the connection part.
• the attachment part 35 may provide a pulling force onto the insulated glass unit 3 by means of the engagement member 82a so as to pull the insulated glass unit 3 towards the movable frame.
• connection part 13a in some embodiments may comprise the hook instead of the attachment part 35.
• the attachment part (s) 35 may be reused and a new glass unit 3 comprising e.g. the connection member 13a may be provided and attached to the frame 2a.
• the engagement member 82a may e.g. comprise a hook as illustrated, but may in other embodiments comprise e.g. a screw or a clips.
• attachment part 35 may be used in some embodiments of the present disclosure.
• a plurality of attachment parts 35 may be distributed discretely along the longitudinal direction of the profile 2a and each attachment parts 35 may engage with the same connection part 13a, or alternatively engage with different connection parts.
• the insulated glass unit 3 is a vacuum insulated glass unit, this may provide that the edges of the VIG unit is allowed to more freely deflect when the glass sheets at each side of the evacuated gap 4 have different temperatures.
• the attachment parts 35 and the engagement member 82a thereof may thus constitute "discrete fixation points".
• only two attachment parts 35 may be arranged along the length of the respective profile of the movable frame 2a.
• more than two attachment parts 35 may be arranged along the length of the respective profile of the movable frame 2a. In some embodiments, between 2 and 6, such as between 2 and 4 (both end points included) attachment parts 35 may be arranged along the length of the respective profile of the movable frame 2a.
• the exterior glass sheet 3a, EGS comprises in fig. 40 a projecting glass sheet portion 3p1, where said projecting glass sheet portion 3p1 projects with a projecting distance DIS1 beyond an end edge 3b_be of the extending glass sheet portion 3p2.
• Said projecting distance DIS1 may in some embodiments be larger than 8 mm, such as larger than 10 mm, such as larger than 15 mm.
• Said projecting distance DIS1 may in some embodiments be between 5 mm and 20 mm, such as between 8 mm and 16 mm, such as between 10 mm and 14 mm. In other embodiments, the distance DIS1 may be longer.
• the projecting glass sheet portion 3p1 may be omitted.
• the connection part 13 a may (not illustrated in fig. 40 ) or may not be connected to the projecting glass sheet portion 3p1 by means of an adhesive.
• connection part 13a and/or said one or more adhesives 33a, 33b may be configured to provide support and/or vibration dampening when mechanical forces, such as provided by hails, strikes a part of the exterior glass sheet EGS that is arranged opposite to the extending glass sheet portion 3p2 and/or strikes the projecting glass sheet portion 3p1 that projects with a projecting distance DIS1 beyond an end edge 3b_be of the extending glass sheet portion 3p2.
• the projecting glass sheet portion 3p1 may however be omitted in some embodiments.
• connection part 13a and/or said one or more adhesives 33a, 33b may thus help to provide a window 1 with an insulated glass unit, such as a VIG unit, that is more resistant to exterior forces impacting the a part of the exterior glass sheet EGS that is arranged opposite to the extending glass sheet portion 3p2 and/or strikes the projecting glass sheet portion 3p1 that projects with a projecting distance DIS1 beyond an end edge 3b_be of the extending glass sheet portion 3p2, when compared to a situation where the connection part 13a and/or said one or more adhesives 33a, 33b is/are omitted.
• an insulated glass unit such as a VIG unit
• the insulated glass unit 3 is in figs. 40 and 41 a VIG unit comprising just one insulating, evacuated gap 4.
• the insulated glass unit 3 may be a glass unit 3 comprising a gas filled insulating gap 7, such as e.g. an insulating gap filled with argon.
• the insulated glass unit 3 may comprise a plurality of insulating gaps 4, 7 which are separated by means of an intermediate glass sheet.
• One or more, of these insulating gaps may in some embodiments be an evacuated gap as e.g. previously described.
• the insulated glass unit 3 may be an insulated glass unit comprising just two, or two or more gas filled insulating gaps 7 separated by an intermediate glass sheet. In some embodiments hereof, no evacuated gap may be present at the insulted glass unit 3.
• the insulated glass unit 3 may be an insulated glass unit comprising at least two evacuated, insulating gaps 4 separated by an intermediate glass sheet.
• the insulated glass unit may be a hybrid vacuum insulated glass unit comprising both at least one evacuated, insulating gap 4 and at least one gas filled gap 7. See e.g. figs. 26-32 .
• the insulated glass unit 3 as described above and below may be one unitary glazing component.
• the glass sheets 3a, 3b, 3d separated by the insulating gap(s) 4, 7 are here bonded together, such as by means of the one or more edge seals 9, 7a so as to constitute said unitary glazing component.
• Fig. 42 illustrates schematically a cross sectional view of a roof window 1 comprising a vacuum insulating glass unit 3 with projecting glass sheet portions 3p3 at the roof window sides SI1, SI2.
• the insulated glass unit is in fig. 42 hybrid type VIG unit comprising a gas filled gap 7 arranged between the exterior glass sheet 3d, EGS and an intermediate glass sheet 3a, and an evacuated gap 4 arranged between said intermediate glass sheet 3a and the glass sheet 3b that bonds to the lamination interlayer.
• the first glass sheet 3a and the exterior glass sheet EGS, 3d both projects 3p3 beyond the side edge 3b_se of the second glass sheet 3b, and the gas filled gap is larger than the evacuated gap 4.
• the further edge seal 7a is arranged between the projecting glass sheet portions 3p3.
• the edge seal side surface 7a2 of the further edge seal 7a that faces the gas filled insulating gap 7 is located between the projecting portions 3p3 of the glass sheets 3a, 3d, so that a part 7b of the gas filled insulating gap 7 overlaps the full width of the edge seal 9 which encloses the evacuated gap 4.
• the projecting glass sheet portions 3p3 may be omitted and the edge seals 7a may be arranged opposite the edge seal 9, or the evacuated gap may overlap the edge seal 7a.
• the glass unit 3 may comprise the evacuated gap 4 and a further insulating gap 7, such as a gas filled gap 7, such as a gap 7 containing argon.
• a glass unit 3 comprising the gaps 7, 4 may have a U g ( U glazing ) value of below 0.5 W / (m 2 K), such as below 0.4 W /( m 2 K ) , such as below 0.3 W /( m 2 K ) .
• the U g ( U glazing ) value of such a unit 3 may be between 0.2-0.5 W /( m 2 K ) , such as between 0.25-0.4 W /( m 2 K ) .
• the U g value may be determined at the centre portion of the glass unit 3.
• the centre portion of the glass unit 3 may be the location of the evacuated gap 4 arranged where two diagonally extending lines 49a, 49b, which extends between diagonally arranged corner portions of the edge seal 9 or 7a intersect.
• Fig. 42 illustrates a further embodiment of the present disclosure, wherein the glass sheets 3a, 3b comprising major surfaces that abuts an evacuated gap 4 are arranged between the exterior glass sheet EGS and the lamination layer 3c, 6.
• the projecting glass sheet portion 3p2 of the second glass sheet 3b projects beyond edges 6e, 3c_se of the lamination interlayer and the further glass sheet / lamination glass sheet 3c.
• glass sheet 3a and/or 3b may additionally or alternatively project beyond a lamination interlayer 6 edge and lamination glass sheet 3c edge at the top TO of the roof window and/or the bottom BO of the roof window (not illustrated in fig. 5 , see e.g. figs. 40-41 ).
• the lamination interlayer 6 and/or the lamination glass sheet 3c still overlaps a frame profile 2a_si of the frame 2a as illustrated.
• the gasket 26 is placed between the frame profile 2a_bo and the lamination layer 6, 3c.
• an adhesive may additionally or alternatively provided so as to adhere the overlapping part 3c_op of the further glass sheet 3c that overlaps the frame profile 2a_si to the overlapped profile 2a_si.
• neither the first edge seal 9 enclosing the evacuated gap, nor the edge seal 7a enclosing the gas filled gap 7, may be overlapped by the lamination layer 6, 3c.
• both insulating gaps 4, 7 overlaps the frame profile 2a of the movable frame 2a. It is generally understood that one or both insulating gaps 4, 7 may additionally or alternatively overlap a frame profile at roof window bottom BO and/or top TO. See also figures described above and/or below.
• the evacuated gap 4 and/or the gas filled gap 7 may overlap at least 30%, such as at least 60% or at least 90% of a frame profile width W1 (see W1 of fig. 1 ) at one, more than one, or all, of roof window bottom BO, side(s) SI1, SI2 and/or top TO. See also figures described above and/or below.
• Fig. 43 illustrates schematically a cross section of sides SI1, SI2 of a roof window 1 according to embodiments of the present disclosure.
• Fig. 43 illustrates a cross section of the sides SI1, SI2 of the roof window.
• the insulated glass unit 3 comprises a single gas filled insulating gap 7. It is however understood that the insulated glass unit 3 may comprise more than one insulating, gas filled gap 7, such as two gas filled gaps 7, that are separated by an intermediate glass sheets (not illustrated in fig. 43 ).
• the gas filled gap 7 is arranged between major surfaces of the glass sheets 3d, 3b that faces the gas filled gap 7, and the gap 7 abuts these surfaces.
• the glass sheet 3b to which the lamination interlayer bonds comprises the extending glass sheet portion 3p2 which projects beyond an edge 3c_se of the further glass sheet (3c) with the distance DIS5.
• the overlapping part 3c_op of the further glass sheet 3c comprising said edge 3c_se is arranged to overlap the side frame profile 2a_si of the movable frame 2a and may or may not be attached to that profile 2a_si.
• Fig. 44 illustrates schematically a cross section of a side of a roof window 1 according to embodiments of the present disclosure.
• a holding profile 86 such as a metal profile, is arranged to overlap the exterior 3su1 of the glass unit 3 and hold the glass unit 3 at the movable frame 2a.
• the holding profile 86 in fig. 44 (and figs. 45-47 ) comprises a side water channel 38 which is arranged between walls of the holding profile, these walls is in fig. 44 integrated in the profile.
• the side water channel 38 is configured to guide water towards the bottom BO of the roof window 1 when the roof window 1 is installed in a building roof structure.
• a side water cover 21a guides water into the channel 38 when the movable frame 2a is in a closed position. This side water cover overlaps both a part of the movable frame and a part of the fixation frame arranged next to the movable frame 2a.
• the holding profile 86 may not comprise such a side water channel, and the side water channel 38 may instead be separate to the holding profile 86 or may be omitted.
• the cover 21a may however be maintained for improved water tightening.
• the holding profile 86 is attached to the side profile 2a_si of the movable frame 2a. This attachment may be obtained by means of one or more mechanical fastener(s) such as screws, nails, pop rivets, clips system and/or the like, and/or by means of chemical fastening, such as an adhesive.
• the holding profile 86 hence assist in attaching the insulated glass unit 3 to the movable frame 2a.
• the holding profile 86 may provide the primary attachment of the insulated glass unit 3 to the frame profile 2a_si at the roof window side SI1 and/or Si2.
• Fig. 44 moreover illustrates an embodiment of the present disclosure where the holding profile 86 overlap the exterior major surface 3su1 of the insulated glass unit 3 and extends to a position opposite the further glass sheet 3c.
• the holding member 86 may provide mechanical holding of the glass unit 3 remains in case the exterior glass sheet EGS is damaged or destroyed, The lamination interlayer 6 and the further glass sheet 3c will thereby be held/maintained between the frame profile 2a_si and the holding profile 86.
• a gasket 26 may be sufficient and the overlapping part 3c_op of the further glass sheet 3c may not need to adhere to the frame profile 2a_si.
• Fig. 44 illustrates a further embodiment of the present disclosure, wherein edge heat insulation 87a, 87b is arranged at the edge area of the insulated glass unit in a utility space 90.
• the edge heat insulation may e.g. be an edge heat insulation as e.g. described previously.
• the edge heat insulation is arranged opposite to, such as may abut, the edge region of the VIG unit.
• the edge heat insulation 87a, 87b may or may not be attached to the glass unit 3.
• the edge heat insulation 87a, 87b is configured to reduce heat transfer at the area of the edge seal enclosing the insulating gap, such as the evacuated gap 4, of the insulated glass unit 3, when compared to a scenario where the heat insulation is omitted.
• the edge heat insulation comprises a heat insulation material 87a which overlap a part of the major exterior glass sheet surface of the extending glass sheet portion 3p2 that extends beyond the edge of the further glass sheet 3c.
• the further glass sheet 3c does not extend all the way to the edge of the glass sheet 3b that the lamination interlayer 6 bonds to, a space saving solution is obtained.
• This may e.g. in some embodiments provide a utility space 90 where the further glass sheet 3c would have been if the further glass sheet 3c projected all the way to the edge of the other glass sheet that the lamination interlayer bonds to.
• the utility space 90 may be arranged opposite to, such as next to, the extending glass sheet portion 3p2 and opposite to, such as next to, the edge 3c_be, 3c_te, 3c_se of the further glass sheet 3c which the extending glass sheet portion 3p2 projects beyond.
• This utility space 90 may be used for various purposes. In fig.
• this utility space 90 is used for the edge heat insulation 87a at the side of the glass sheet 3b that faces away from the exterior glass sheet 3a,EGS.
• the heat insulation 87a and/or 87b may as illustrated overlap the edge seal 9 which may e.g. be a solder edge seal such as a solder glass or metal solder edge seal as e.g. described above if the insulated glass unit 3 is a VIG unit which is the case in fig. 44 .
• the edge heat insulation material 87a and/or 87b may reduce the magnitude of the heat transfer through the edge seal 9 that would otherwise be present if the edge heat insulation material 87a and/or 87b was omitted.
• edge heat insulation 87a may also be provided in the utility space 90 opposite an edge seal 7a enclosing a gas filled gap, and/or opposite the gas filled gap (see e.g. utility space 90 of fig. 43 ).
• the edge heat insulation 87a, 87b may or may not extend to overlap major exterior glass sheet surfaces to a position opposite the insulating gap 4. In fig. 44 the edge heat insulation 87a, 87b extend to overlap major exterior glass sheet surfaces at a position opposite the insulating gap 4, which may improve heat insulation performance. For example, a longer cold bridge CB between the exterior EXT of the building and the interior INT of the building may be obtained.
• the edge heat insulation 87a is arranged between the frame profile 2a_si of the movable frame 2a and the insulated glass unit 3.
• the other edge heat insulation 87b is arranged between the holding profile 86 and the insulated glass unit 3. In some embodiments, only one of the edge heat insulation 87a, 87b may be present. In other embodiments, both 78a, 87b may be present.
• the edge heat insulation 87a, 87b may extend to a position opposite the side surface 88 of the insulated glass unit 3.
• the edge heat insulation may or may not be attached to the Insulated glass unit 3.
• edge heat insulation 87a and/or 87b may be omitted in other embodiments of the present disclosure.
• a part 89 of the side frame profile 2a_si extends to a position opposite the side surface 88 of the glass unit 3.
• the side surface 88 may comprise a combination of, or be arranged opposite to, edge surfaces of the glass sheets 3a, 3b that extends between major surfaces of the respective glass sheet 3, 3b and a surface part of the edge seal 9.
• This part 89 of the frame profile 2a_si may e.g. provide heat insulation advantages and/or structural advantages.
• the part 89 of the profile may e.g. also be omitted, see e.g. fig. 46 .
• Fig. 45 illustrates schematically further embodiments of the present disclosure wherein the holding profile 86 overlap the exterior surface 3su1 of the insulated glass unit 3 at the side SI1 of the roof window.
• the holding profile 86 does in fig. 45 not extend to overlap the further glass sheet / lamination glass sheet 3c. Hence, a larger part of the exterior surface 3su1 of the glass unit may be exposed. Instead, an adhesive 83 between the overlapping part 3c_op of the further glass sheet 3c and the frame profile 2a_si adheres the glass unit 3 to the movable frame 2a.
• the exterior glass sheet EGS, 3a (and possibly also glass sheet 3b that the lamination interlayer 6 adheres to) breaks, at least the combination of the movable frame 2a, the adhesive 83, the overlapping part 3c_op of the further glass sheet 3c and the lamination interlayer 6 provides safety by ensuring that less or no remains from the insulated glass unit 3 falls towards the floor.
• the adhesive 83 may comprise a single adhesive material/ adhesive composition or a combination of adhesives.
• the adhesive 83 may in some embodiments of the present disclosure comprise or consist of an adhesive tape and/or a glue, such as a silicone adhesive.
• the gasket 26 is arranged next to the adhesive 83 between the adhesive and the frame opening FO1. In other embodiments, the gasket 26 may be replaced by the adhesive 83.
• Fig. 46 illustrates schematically further embodiments of the present disclosure wherein the insulated glass unit 3 and the insulating gap 4 of the insulated glass unit 3 overlaps a major part of the width W1 of the frame profile 2a_si. This provides that the edge seal 9 is located further away from the frame opening FO1, which may e.g. reduce condensation issues at the surface 3su2 and/or may improve heat insulation performance of the roof window.
• the insulated gap(s) 4 of the insulated glass unit may overlap at least 50%, such as at least 80%, such as at least 90% of the maximum width W1 of the profile 2a_si. In some embodiments, however, the insulated gap(s) 4 may overlap less than 95%, such as less than 70% of the profile 2a_si width.
• Fig. 46 moreover illustrates a further embodiment of the present disclosure, where the holding profile 86 overlaps the side surface 88 of the insulated glass unit and extend to a position where an attachment part 35 of the holding profile is attached to the side frame profile 2a_si of the movable frame 2a.
• a part of the holding profile 86 that overlaps the exterior major surface 3su1 of the insulated glass unit 3 may be attached to the surface 3su1, e.g. by means of an adhesive.
• a tightening e.g. integrated in the adhesive, such as said adhesive, may provide water tightening between the exterior surface 3su1 and the overlapping part of the profile that overlaps the surface 3su1.
• the attachment part 35 overlaps a side profile surface 2a_sis2 of the frame profile 2a_si of the movable frame 2a. That overlapped side profile surface 2a_sis2 faces away from the first frame opening FO1 and faces towards the fixation frame profile 2b_si.
• the attachment part 35 may abuts the surface 2a_sis2.
• the attachment part 35 may be attached to the frame profile 2a_si by means of mechanical and/or chemical fastening. E.g. as previously described, for example in relation to fig. 13 .
• the holding profile 86 may (see fig. 46 ) or may not (not illustrated in fig. 46 ) comprise the side water channel 38.
• the side water channel 38 may be arranged next to a part of the holding profile that overlaps and is attached to the exterior major surface 3su1 of the insulated glass unit 3.
• Fig. 46 moreover illustrates a an embodiment of the present disclosure, where it can be seen that an extending part 6x of the lamination interlayer 6 may project beyond the edge of the overlapping part 3c_op of the further glass sheet.
• the extending glass sheet portion 3p2 projects beyond the edge 3c_se of the further glass sheet 3c and overlaps the part 6x of the lamination interlayer 6 and extends beyond the edge 6e of the lamination interlayer.
• the extending part 6x of the lamination interlayer 6 may e.g. be excess material due to that the sheet material of the lamination interlayer 6 was not cut tightly to be flush with the edge 3c_se of the lamination glass sheet 3c during or after the lamination process. Additionally or alternatively, the extending part 6x of the lamination interlayer 6 may originate from that some of the lamination material 6 flowed from a position between the glass sheets 3c, 3b and beyond the edge 3c_se of the lamination glass sheet 3c when the lamination interlayer 6 material was heated and softened during the lamination process. Since the extending glass sheet portion 3p2 projects beyond the edge 3c_se of the further glass sheet 3c, this provides utility space that allows the extending part 6x to be present. Hence, manufacturing advantages may be obtained and/or tolerance demands to the glass unit 6 and/or frame 2a may be lowered.
• the edge heat insulation 87a may as illustrated be arranged with a distance to the edge surface of the edge 3c_se of the further glass sheet 3c, and hence the presence of the extending part 6x of the lamination interlayer may be accepted or the size, such as projection length, of the extending part 6x may be allowed to be larger.
• the extending part 6x of the lamination interlayer 6 may extend between 2 mm and 20 mm, such as between 2 mm and 15 mm, such as between 3 mm and 9 mm beyond the edge 3c_se of the overlapping part 3c_op of the further glass sheet 3c.
• the edge heat insulation material 87a may abut the edge of the lamination interlayer 6e and/or the edge 3c_se of the overlapping part 3c_op of the further glass sheet 3c.
• the utility space 90 that is arranged opposite to, such as next to, the extending glass sheet portion 3p2 and opposite to, such as next to, the edge 3c_se, 3c_be of the further glass sheet 3c which the extending glass sheet portion 3p2 projects beyond, may in some embodiments of the present disclosure be used for different purposes. As described above, it may be used for hosting excess material 6x of the lamination interlayer 6. Additionally or alternatively, it may be used for hosting edge heat insulation 87a. It In additional or alternative embodiments, the utility space 90 may be used for hosting (not illustrated) electric conducting wires (e.g. for supplying power to motors or blinds or switchable coatings).
• the utility space may be used for hosting illumination elements (not illustrated) such as comprising LED's (Light emitting diodes) that may be configured to illuminate glass of the glass unit a lightguide.
• the utility space 90 may be used for hosting photovoltaic elements (not illustrated) configured to generate electricity (e.g. for one or more sensors and/or transmitters, and/or for example for charging a battery for a motor of the window or a screening for the window).
• the utility space 90 may also be used for hosting a connection part 13a, such as a profile member, which is attached to the extending glass sheet portion 3p2 by means of one or more adhesives 33a, 33b, and where the connection part 13a is used for attaching the insulated glass unit 3 to a movable frame 2a of the roof window 1, See e.g. figs 40-41 .
• a connection part 13a such as a profile member
• the connection part 13a is used for attaching the insulated glass unit 3 to a movable frame 2a of the roof window 1, See e.g. figs 40-41 .
• Fig. 47 illustrates schematically an embodiment of the present disclosure, wherein a part of the holding profile 86 that overlaps the exterior glass sheet surface 3su1 extends to a position opposite the overlapping part 3c_op of the further glass sheet 3c. Moreover, an adhesive 83 that adheres the overlapping part 3c_op of the further glass sheet 3c to the overlapped frame profile 2a_si of the frame 2a, as e.g. described above in relation to fig. 45 , is present. This may be a combination of embodiments of fig. 44 and 45 . This may provide a further safety.
• the bold, dashed arrow CB illustrated in figs. 44 , 46 and 47 illustrate envisaged estimated cold bridge path.
• the insulating gap 4 overlaps the frame profile and e.g. also by providing optional edge heat insulation 87a, 87b, the cold bridge may be longer and/or a window 1 with an improved heat insulation performance may be obtained.
• Fig. 48 illustrates schematically a cross sectional view of an embodiments of the present disclosure, where the extending glass sheet portion 3p2 of the glass sheet 3b projects beyond a top edge 3c_to of the further glass sheet 3c at the top TO of the roof window.
• the overlapping part 3c_op of the further glass sheet 3c comprising the top edge 3c_te of the further glass sheet 3c is arranged to overlap the frame profile 2a_bo, 2a_to of the movable frame 2a, e.g. as previously described in relation to one or more of figs. 40-47 .
• Figs. 49A-49D schematically illustrates an insulated glass units 3 according to various embodiments of the present disclosure.
• the glass unit 3 comprises one or more extending glass sheet portions 3p2 and the further glass sheet 3c comprises one or more overlapping parts 3c_op at the area where the extending glass sheet portion(s) 3p2 is/are located.
• the one or more overlapping parts 3c_op will overlap a frame profile as e.g. illustrated in fig. 4 and/or one or more of figs. 40-48 when the glass unit 3 is installed in a roof window frame, such as in a movable frame 4a of a roof window.
• Figs. 49A-49D illustrates a view towards the exterior surface 3su2 of the insulated glass unit 3 that is to face the interior of the building when the roof window is installed in the building roof structure.
• the glass unit 3 illustrated in figs. 48A-48D may be an insulated glass unit as described above according to various embodiments of the present disclosure, and/or be a result of a combination of such embodiments.
• the insulated glass unit 3 illustrated in the various figures 49A-49D comprises a top 3to, a bottom 3bo, and sides 3si. It is generally understood that:
• the top TO op the roof window is configured and designed to be arranged at a higher vertical position than the bottom BO of the roof window when installing the roof window as intended and prescribed, and the roof window provides sufficient weather tightening and water tightening.
• the roof window may be of the type configured to be installed in a roof structure having a roof pitch above 17°, such as above 30° relative to horizontal.
• Fig. 49A illustrates schematically an insulated glass unit 3 according to an embodiment of the present disclosure, where the extending glass sheet portion 3p2 projects beyond a bottom edge 3c_be of the further glass sheet 3c. See e.g. fig. 4 , 40 or 41 . However, the step 3p1 is omitted in fig. 49A . At the sides and top of the glass unit 3 however, the glass sheet that is arranged next to the further glass sheet 3c, and to which the lamination interlayer 6 bonds, does not comprise an extending glass sheet portion 3p2 at the top or sides of the glass unit.
• edges 3c_te, 3c_se of the further glass sheet 3c may here extend to be substantially flush with the edge of the other glass sheet to which the lamination interlayer 6 bonds at the top and sides of the glass unit 3. See e.g. fig. 25 and/or fig. 18 (a step at the side of the glass unit provided by the exterior glass sheet is omitted in fig. 49A ).
• Fig. 49B illustrates schematically an insulated glass unit 3 according to a further embodiment of the present disclosure.
• an extending glass sheet portion 3p2 projects beyond a bottom edge 3c_be of the further glass sheet 3c. See e.g. fig. 4 , 40 or 41 .
• the step 3p1 is omitted in fig. 49A .
• an extending glass sheet portion 3p2 projects beyond the side edges 3c_se of the further glass sheet 3c.
• the glass sheet that is arranged next to the further glass sheet 3c, and to which the lamination interlayer 6 bonds does not comprise an extending glass sheet portion 3p2 at the top of the glass unit.
• the edge 3c_te of the further glass sheet 3c may here extend to be substantially flush with the edge of the other glass sheet to which the lamination interlayer 6 bonds at the top of the glass unit 3.
• the glass unit 3 of fig. 49B may e.g. be used in a roof window comprising a combination of an embodiment as illustrated in one pf figs. 40 or 41 (excluding step portion 3p1) , and an embodiment as illustrated in one of figs. 43-47 .
• Fig. 49C illustrates schematically an insulated glass unit 3 according to a further embodiment of the present disclosure.
• an extending glass sheet portion 3p2 projects beyond a bottom edge 3c_be of the further glass sheet 3c. See e.g. fig. 4 , 40 or 41 .
• the step 3p1 is omitted in fig. 49A .
• an extending glass sheet portion 3p2 projects beyond the top edge 3c_te of the further glass sheet 3c.
• the glass sheet that is arranged next to the further glass sheet 3c, and to which the lamination interlayer 6 also bonds does not comprise an extending glass sheet portion 3p2 at the sides of the glass unit 3.
• the edge 3c_se of the further glass sheet 3c may here extend to be substantially flush with the edge of the other glass sheet to which the lamination interlayer 6 bonds at the sides of the glass unit 3.
• the glass unit 3 of fig. 49C may e.g. be used in a roof window comprising a combination of an embodiment as illustrated in one of figs. 40 or 41 (excluding step portion 3p1) , and an embodiment as illustrated in e.g. fig. 48 .
• Fig. 49D illustrates schematically an insulated glass unit 3 according to a further embodiment of the present disclosure.
• an extending glass sheet portion 3p2 projects beyond the edge at all four sides of the further glass sheets 3c.
• an extending glass sheet portion 3p2 projects beyond the bottom edge 3c_be, side edges 3c_se and top edge 3c_te of the further glass sheet 3c.
• the glass unit 3 of fig. 49D may e.g. be used in a roof window 1, and comprise a combination of:
• Fig. 49E schematically illustrates an insulated glass unit 3 according to a further embodiment of the present disclosure.
• an extending glass sheet portion 3p2 projects beyond the edge at all four sides of the further glass sheets 3c.
• an extending glass sheet portion 3p2 as e.g. previously described projects beyond the bottom edge 3c_be, side edges 3c_se and top edge 3c_te of the further glass sheet 3c.
• the exterior glass sheet comprises a step 3p1 as e.g. described above according to various embodiments of the present disclosure in figs. 1-41 .
• the glass unit 3 of fig. 49E may e.g. be used in a roof window 1, and comprise a combination of:
• the insulated glass unit may comprise a masking 12 (not illustrated in figs. 49A-49E ), such as an enamel layer, as e.g. previously described ( see e.g. one or more of figs. 7 , 20-21 , 26-27 , 30 , 35 , 39 ).
• This masking may cover and hide (when seen towards the exterior major surface 3su1 of the glass unit 3 with the human eye) one or more of:
• the enamel layer may e.g. be arranged at the exterior glass sheet 3a, such as at the major surface thereof which faces away from the exterior surface 3su1.
• the edges 3c_be, 3c_si, 3c_to of the further glass sheet 3c / lamination glass sheet may be substantially straight, and each edge 3c_be, 3c_si, 3c_to extends (in the longitudinal direction of the respective edge) between two corners c3c of the further glass sheet 3c / lamination glass sheet, and is terminated at the respective corner c3c.
• the top edge 3c_te hence meet the respective side edge 3c_se at the respective corner c3c, and the top edge 3c_te and side edges 3c_se are terminated at that respective corner.
• the bottom edge 3c_be meet with a side edges 3c_se at a corner c3c, and the bottom edge 3c_te and side edges 3c_se are terminated at that respective corner c3c.
• one or more edges 3c_se, 3c_te, 3c_be of the further glass sheet 3c may be substantially flush with and parallel to an edge of another glass sheet of the insulated glass unit 3, see e.g. various embodiments of figs. 49A-49C .
• that other glass sheet may be the neighbouring glass sheet that the lamination interlayer is attached to. Thereby, it may be more easy to align and position the further glass sheet 3c relative to the rest of the glass sheets of the insulated glass unit 3 during the lamination process.
• a roof window 1 illustrated in figures described above, such as in relation to figs. 14-17 and 24 , which do not show a lamination interlayer 6 and a further glass sheet/lamination glass 3c, may however still comprise a lamination interlayer 6 and a further glass sheet 3c as described according to various embodiments of the present disclosure.
• the distance DIS5 with which the extending glass sheet portions 3p2 projects beyond the edge 3c_se, 3c_be, 3c_te of the further glass sheet 3c may be different at different sides 3si, 3to, 3bo of the insulated glass unit 3.
• the distance DIS5 may be larger at the bottom that 3bo than at the top 3to and/or side(s) 3si of the glass unit 3, see fig. 49E .
• the surface area of a major surface 3su2 of the further glass sheet 3c may be at least 2% less, such as at least 3% less, such as at least 5% less than the surface area of a major surface of the neighboring glass sheet that the lamination interlayer 6 is attached to.
• the surface area of a major surface of the further glass sheet may be between 2% - 15% less, such as between 3% - 10% less, such as between 4%-8% less than the surface area of a major surface of the neighboring glass sheet that the lamination interlayer 6 is attached to.
• Various embodiments hereof are e.g. illustrated in fig. 4 and figs. 40-49E .
• the lamination interlayer 6 may be of the sound dampening type, also called an acoustic lamination interlayer.
• an acoustic lamination interlayer may be obtained by using one or more sheets of acoustic lamination interlayer material.
• Such acoustic lamination interlayers have shown to provide good dampening of noise from rain striking the exterior glass sheet of a roof window, especially noise in the frequency range perceivable to the human ear, for example within the range of 20 Hz to 13000 Hz, such as within the range of 200 Hz to 8000 Hz.
• Also such acoustic lamination interlayers have shown to be advantageous during safety drop tests where a ball or another heavy object is dropped to damage the insulated glass unit. The acoustic lamination interlayer helps to catch such a ball.

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