WO2025211971A1

WO2025211971A1 - Method for construction of building units

Info

Publication number: WO2025211971A1
Application number: PCT/PH2025/050004
Authority: WO
Inventors: Ricardo Jr. R. RODRIGUEZ; Shiela Marie S. DONADO; Meneleo Jr. J. CARLOS
Original assignee: Ri Chemical Corp
Current assignee: Ri Chemical Corp
Priority date: 2024-04-01
Filing date: 2025-03-27
Publication date: 2025-10-09
Anticipated expiration: 2026-10-01

Abstract

The present invention relates to a method for construction of a building unit characterized by the use of fiber cement-plywood composite boards and laminated veneer lumber as parts, and the use of construction adhesive to form and fasten the said parts. The invention also relates to the building units, such as a house, built according to the said method. With the use of only adhesive for fastening the parts of the house, the construction becomes simple and cost- effective. The load-bearing capacity of the structure is superior considering that it is made out of light materials. The 16ft x 16ft layout is based on the structural integrity of the material, the economy of space, decency, security, and comfort at a very affordable price.

Description

SPECIFICATION METHOD FOR CONSTRUCTION OF BUILDING UNITS TECHNICAL FIELD The invention relates to a method of constructing building units using composite materials and adhesives, for varied purposes and functions, including low-cost housing. BACKGROUND OF THE INVENTION A house is one of the essential needs of the people. Conventional houses are usually made of wood, cement, iron bars, and GI sheets, among other construction materials. These materials are often expensive and the construction of a house with the said materials is complex and takes a long time and requires many workers. All these cause difficulty in the construction of decent dwellings for Filipino families. The ideal for any building unit is that it will be there to stand the test of time and exposure to the elements so as to serve its purpose and need for a long, long time. A number of basic steps may be identified in constructing a building unit in the conventional way. Firstly, the ground at the site of the building unit should be cleared and levelled before the next step of pouring the foundation. Foundations often consist of poured concrete with steel rods. Since concrete isn’t waterproof, this should be sprayed with a waterproofing substance. Subsequent steps become more and more complex and labor/material-intensive, such as, framing, setting up plumbing, electrical, ventilation system, adding insulation and drywall, interior and exterior finishes, and installing fixtures and flooring. Simplified and low-cost houses, as well as the method of constructing the same, already form part of the prior art. CN206090841, titled “Fast Installation Room Structure”, published on 12 April 2015, relates to a quick-assembly house structure comprising a steel modular frame and a plurality of modular cement boards wherein said steel modular frame comprises a top beam, a vertical column, a bottom frame, and a foot column; the steel modular frame adopts a channel steel welding structure, the lower end of the stand column is vertically fixed on the bottom frame, and the upper end of the stand column is connected with the top beam; the foot column is located below the bottom frame and is vertically fixed to the bottom frame. Said modular cement board comprises a channel steel frame and a fiber cement board wherein the channel steel frame is of a rectangular frame structure and the fiber cement board is fixed in the channel steel frame. Said cement board comprises aerated concrete fiber board, a thermal insulation board, and a high-pressure cement fiber board which are sequentially attached to each other. CN206267295U, titled “Big Board House”, published on 20 June 2017, relates to a large board room with walls, doors, windows, and roof panels wherein said room has no pillars, steel frame, mold beam or purlins. Provided therein is a matrix for the foam cement board with shaped channel package edge and use of more than three steel wire to tighten the reinforcement, or in the board covered with steel mesh reinforcement, and in the whole piece of foam cement board surface but also overall use of high-strength mortar pastes on the grid cloth. The foamed cement board has a strong increase in strength after having a steel channel, steel wire, a mesh cloth, and a high strength mortar, and steel wire. A Youtube video titled “New process for producing wooden composite material by using waste and used plywood cement templates (China)”, with link shows a method of installing cement to a leveling and fitting the fiber cement board onto the frame, putting adhesive on the frame, attaching fiber cement board onto the said frame with adhesive, and locking the fiber cement board with screws. JP 2000129720 discloses a low-cost house building method that includes constructing a foundation that an individual concrete footing at the periphery in which a foundation for a plurality of framework columns are erected and mat foundations for an external wall foundation connecting the individual footings and within an earthen floor surrounded by the external walls are integrally fixed, a field welding process for a heavy square steel pipe column and a beam in which a framework is erected on the individual footing, and a process using a light weight cellular concrete board for an exterior wall and a reinforcing steel frame for an opening. CN 200710034832.5 discloses to a method for rapidly assembling a low cost energy-saving house with precast columns, beams and slabs comprises the steps of preparing house columns, beam molds and built-in reinforcing steel bars or profiled steel bars, pouring concrete grout into the molds, high-speed rotating in a centrifuge, curing, and demolding to obtain precast reinforced concrete columns and beam components; and inserting the precast columns on a cup foundation element, passing the precast beams through the preformed pores on the precast column, lapping precast floor slabs on the precast beams, and embedding wall slabs inside the embedding grooves of the precast beams, so as to form the major structure of the rapidly assembled low-cost energy-saving house. JP 2011154728 relates to a simple building construction that comprises: quadrilateral annular frame units each of which consists of four wooden frame bars connected to each other at respective end parts thereof by joint metal fittings in an orthogonal state; structural plywood plates which are fixed on the top surfaces of a plurality of annular frame units and the exterior surfaces of both side faces opposing to each other to connect and integrate between the wooden frame bars, in the state that the plurality of annular frame units are arrayed in parallel at predetermined intervals in the thickness direction; and floor boards which are fixed on the floor surfaces of the plurality of annular frame units. The object of the present invention is to provide an easy and cost-effective method for constructing buailding units for varied purposes and functions, in particular, a simplified and low-cost house unit. SUMMARY OF THE INVENTION The present invention relates to a method for construction of a building unit characterized by the use of fiber cement-plywood composite boards and laminated veneer lumber as parts, and the use of construction adhesive to form and fasten the said parts. The invention also relates to the building units, such as a house, built through the said method. With the use of only adhesive for fastening the parts of the house, the construction becomes simple and cost-effective. The said fiber cement-plywood composite board is used as the main construction material for the low-cost house. The fiber-cement part of the panel faces the outside of the house due to its weather, fire, and termite-resistant properties while the plywood component provides good insulation and may provide a wooden interior finish. As the structure is predominantly made of wood and fiber cement, the house is perfect for the weather in the tropics as it provides cooler ambient room temperature and better ventilation. The load-bearing capacity of the structure is superior considering that it is made out of light materials. The 16ft x 16ft layout is based on the structural integrity of the material, the economy of space, decency, security, and comfort at a very affordable price. The house uses laminated veneer lumber (LVL) to combine the best features of cement and wood resulting in benefits of strength, weatherability, fire and termite resistance. The laminated veneer lumber serves as the framework where the plywood-fiber cement panels are glued at the joints. The use of laminated veneer lumber is because it is better quality than lumber from sawmills. It does not warp and weathers better than lumber. Glue or adhesive is stronger than nails because it binds a much larger area than individual nails. It also does not corrode, unlike nails. When gluing the plywood-fiber cement composite board, it can integrate the said composite board into the structure thus enhancing the structural strength and rigidity of the entire structure. A nailed house usually shakes which gradually loosens the nails until the structure fails, while a glued house is rigid all the time and will only break when it reaches a much higher yield point than the nailed structure. The house is built on pedestals which are cost-effective because they require less space and material and are easy to erect compared to the slab or foundation type of the traditional low-cost houses that require more materials and are labor intensive. With the use of plywood-fiber cement boards as flooring, joist spacing is relaxed. Traditional low-cost houses that would use fiber cement boards as flooring demand stringent joist spacing which is more expensive. Other components like laminated veneer lumber (LVL) are cheaper per unit compared to traditional lumber. The house is cooler inside because the plywood-fiber cement composite boards serve as good insulation, minimizing the effect of heat. It likewise makes the house more fire-resistant than the bamboo or bare plywood of traditional low-cost houses. BRIEF DESCRIPTION OF THE FIGURES IN THE DRAWINGS The embodiments of the invention, which relates to the method of building a house and the house built through the said method, are illustrated in the following drawings: Figure 1 shows a schematic diagram of the method of constructing a house unit. Figure 2 shows the formation of the base of the house. Figure 3 shows the fixing of the floor frame to the base. Figure 4 shows the fixing of the floor board to the floor frame. Figure 5 shows the attachment of the bottom plates to the floor board. Figure 6 shows the attachment of the studs to the bottom plates. Figure 7 shows the attachment of the wall panels to the bottom plates and the studs. Figure 8 shows the fixing of the roof frame onto the studs. Figure 9 shows the fixing of the roof board onto the roof frame. Figure 10 shows the house provided with stairs. Figure 11 shows the composite board used as panels. Figure 12 shows the preferred floor plan of the house. DETAILED DESCRIPTION The detailed description of embodiments provided herein, as well as the drawings it refers to, is intended for illustration purposes and is not intended to limit the protection of the invention. As shown in Figures 1 to 12, the invention relates to a method for construction of a building unit, with illustrations of the preferred embodiment of building a house unit 1. Preferably, the house is for human dwelling but it may also be used as office space, storage of stocks and commodities, and other similar uses. A basic embodiment of the invention is that of amethod for construction of a building unit comprising the steps of: a) providing at least four floor frame segments (31) and a plurality of floor joists (33) to form a floor frame (3); b) operatively joining the frame segments (31) and the floor joists (33) together by applying an adhesive (4) on the surfaces being joined together to form the said floor frame (3) with four floor frame corners (32); c) providing a floor board (5) which includes at least one floor panel (51), at least four floor edges (52) that define the shape of the floor board, and four floor corners (53) where the respective floor edges connect; d) operatively fixing the said floor board (5) to the floor frame (3) by applying the adhesive (4) on the surfaces being joined together; e) providing a plurality of bottom plates (6); f) joining the respective ends of the bottom plates (6) by applying the adhesive (4) on the surfaces being joined together to form at least four bottom plate corners (61) to correspond to the four floor corners (53) of the floor board (5); g) fixing the bottom plates (6) to the floorboard (5), along the floor edges (52), by applying the adhesive (4) on the surfaces being joined together; h) providing a plurality of studs (7); i) attaching the said studs (7) to the bottom plate corners (61) and the bottom plates (6) by applying the adhesive (4) on the surfaces being joined together; j) providing a plurality of wall panels (9); k) operatively fixing the said wall panels (9) to the corresponding bottom plates (6) and studs (7) by applying the adhesive (4) ) on the surfaces being joined together; l) providing at least four outer rafters (121) and a plurality of inner rafters (123) to form a roof frame (12); m) operatively joining the outer rafters (121) and the inner rafters (123) together by applying the adhesive (4) on the surfaces being joined together to form the said roof frame (12) with at least four roof frame corners (122); n) operatively fixing the said roof frame (12) to the studs (7) and wall panels (9) by applying the said adhesive (4) on the surfaces being joined together; o) providing a roof board (13) which includes at least one roof panel (131); and p) operatively fixing the said roof board (13) onto the roof frame (12) by applying the adhesive (4) on the surfaces being joined together. Figure 2 shows the formation of a preferred base 2 of the house. As shown, the base is comprised of a plurality of pedestals 21, 22, 23, preferably with a portion buried into the ground and a portion extending two feet from the ground, and a plurality of anchor plates 24, 25, 26, preferably made of metal, operatively fixed on top of the pedestals. Preferably, the base includes at least four corner pedestals 21 operatively arranged to indicate a polygonal shape, preferably sixteen feet by sixteen feet square; at least one middle pedestal 22 positioned between each adjacent pair of corner pedestals; at least one center pedestal 23 positioned substantially at equal distance from the corner pedestals. Likewise preferred, the base includes a corner anchor plate 24, preferably angled, fixed on top of each of the corner pedestals; a middle anchor plate 25, preferably flat, fixed on top of each of the middle pedestals; and a center anchor plate 26, preferably in cross form, fixed on top of the center pedestal. Figure 3 shows the formation of a preferred floor frame 3 and the fixing of the floor frame on the base 2. The floor frame is comprised of at least four floor frame segments 31, sixteen feet in length, and made of laminated veneer lumber but any other materials known in the art may be used. The ends of the floor frame segments 31 are operatively joined together through an adhesive 4 to form four floor frame corners 32. The floor frame corners are then respectively fixed to the corner anchor plates 24 through the adhesive 4, capscrew or any other means known in the art. The floor frame segments 31 are also respectively fixed to the middle anchor plates 25 through the adhesive 4, capscrew or any other means known in the art. As further shown in the figure, the floor frame 3 also includes a plurality of floor joists 33 with their respective ends operatively attached to the floor frame segments 31 through the adhesive 4. The floor joists 33 may have substantially the same length as those of the floor frame segments 31 or may be of shorter lengths but joined together to fit in the floor frame 3. Preferably, four floor joists 33 are operatively attached to the corresponding floor frame segment 31 through the adhesive 4 and the center anchor plate 26 through the adhesive 4, capscrew or any other means known in the art. Alternatively, the co-linear floor joists 33 may be joined through the adhesive 4 while their respective free ends 34 are operatively attached to the corresponding floor frame segment 31 through the adhesive 4. The joined ends 35 of the co-linear floor joists 33 are preferably attached to the center anchor plate 26 through the adhesive 4, capscrew or any other means known in the art. Moreover, one end of the other floor joists 33 may be operatively attached to the corresponding floor frame segments 31 through the adhesive 4, and the other end may be operatively attached to the corresponding floor joists 33, also through the adhesive 4. The said floor joists are preferred to be made of laminated veneer lumber but other suitable materials known in the art may be used. Figure 4 shows the attachment of a floor board 5 to the floor frame 3. As shown, the floor board 5 conforms with the shape of the floor frame 3 and includes at least one floor panel 51, preferably eight floor panels, fastened to the said floor frame 3 through the said adhesive 4. The floor board 5, likewise, includes at least four floor edges 52 that define the shape of the floor board, and four floor corners 53 where the respective floor edges connect. Figure 5 shows the attachment of a plurality of bottom plates 6 to the floor board 5. As shown, the bottom plates 6 are operatively attached to and have the same length as the floor edges 52 of the floorboard 5. Each bottom plate 6 may just be one segment or a plurality of short segments joined into one longer segment. The ends of the bottom plates 6 are preferably connected to form at least four bottom plate corners 61 to correspond to the at least four floor corners 53 of the floorboard. The bottom plates 6 are fastened to the floorboard 5, along the floor edges 52, through the adhesive 4. A bottom plate portion 62 may be removed to allow the unhindered pass-through. The bottom plates are preferred to be made of laminated veneer lumber but other suitable materials known in the art may be used. Figure 6 shows the attachment of a plurality of studs 7, preferably eight feet in length, to the bottom plates 6. As shown, the studs 7 are operatively attached and fastened at the bottom plate corners 61 and between the said bottom plate corners through the adhesive 4. As likewise shown in the figure, a house door frame 8 is formed comprising at least one horizontal house door frame segment 81 with one end preferably attached to one stud 7 and the other end preferably attached to another stud 7 through the adhesive 4; and at least one vertical house door frame segment 82 with one end preferably attached to one bottom plate 6 and the other end preferably attached to the horizontal door frame segment 81 through the adhesive 4. The house door frame is preferred to be formed between two studs 7 near one bottom plate corner 61. The corner studs 7 and the house door frame 8 are preferred to be made of laminated veneer lumber, but other suitable materials known in the art may be used. Figure 7 shows the attachment of a plurality of wall panels 9 to the bottom plates 6 and the studs 7. As shown, a plurality of wall panels 9 are respectively fastened to the bottom plates 6 and the studs 7 through the adhesive 4. As likewise shown in the figure, at least one awning window 10 is formed on any one of wall panels 9 supported by an awning window frame 101; and at least one exhaust window 102 is formed on one wall panel 9 supported by an exhaust window frame 103. A house doorway 11 is also formed on the wall panels 9. The house is preferred to have seven awning windows 10. Figure 8 shows the fixing of a roof frame 12 to the studs 7 and wall panels 9. As shown, the roof frame 12 includes at least four outer rafters 121 operatively fixed to the studs 7, with the respective ends of two outer rafters 121 joined through the adhesive 4 to form a roof frame corner 122. As likewise shown, a plurality of inner rafters 123 are fitted between and attached to the outer rafters 121 through the adhesive 4. The inner roof frame segments 123 may be in parallel or joined together in a cross formation. The outer rafters and the inner rafters may just be one piece or a plurality of shorter pieces joined together to form a longer piece. The roof frame 12 is preferably made of laminated veneer lumber but other suitable materials known in the art may be used. The roof frame 12 is operatively fastened to the studs 7 and the wall panels 9 through the adhesive 4. Figure 9 shows the fixing of a roof board 13 onto the roof frame 12. As shown, the roof board 13 includes at least one roof panel 131, preferably eight roof panels, fastened to the roof frame 12 (see Figure 8) through the adhesive 4. As also shown, the roof panels connect to the wall panels 9. Figure 10 shows the preferred configuration of the house 1 provided with at least one awning window panel 14, preferably seven awning window panels; a house door panel 15; and a stair assembly 16. As shown, the awning window panel 14 is operatively attached to the corresponding wall panel 9 to close the awning windows 10. The house door panel 15 is operatively fitted in and attached to the house door frame 8. As likewise shown, the stair assembly is formed in front of the house doorway 11 and is comprised of a stair platform 161 connected to the house doorway 11, a plurality of stair columns 162 adapted to elevate the stair platform 161, a stair handrail 163 formed on the stair platform 161, at least one stair step 164 positioned lower than the stair platform, and at least two stair slopes 165 adapted to support the stair step 164. The stair assembly 16 is fastened together through the adhesive 4. The plurality of stair columns 162, the stair handrail 163, and stair slopes 165 are preferably made of laminated veneer lumber but other suitable materials known in the art may be used. Figure 11 shows a representation of a composite board 100 that is used as panels for the house 1. As shown, it is comprised of a fiber cement board 20, a plywood board 30, preferably marine plywood, and a sufficient amount of adhesive 4 adapted to fasten the fiber cement and the plywood together. The adhesive 4 may be a heat-curing system or a cold-curing system, and may or may not use a curing catalyst. The composite board 100, termed “PLYCON”, is used for the floor panels, wall panels, roof panels, awning window panels, house door panel, stair platform, and stair steps described above. Figure 12 shows the preferred floor plan 200 of the house 1. As shown, the house 1 includes a master bedroom 201 and a second bedroom 202, both operatively enclosed by a plurality of bedroom dividers 206, and two bedroom doors 207. Moreover, the house includes a toilet-bathroom 203 operatively enclosed by a toilet-bathroom divider 208 and a toilet-bathroom door 209; a kitchen area 204, and a living-dining area 205. The bedroom dividers 206, the bedroom doors 207, the toilet-bathroom divider 208, and the toilet-bathroom door 209 are preferred to be made of a combination of laminated veneer lumber and the composite board 100, and joined together by the adhesive 4. Basically, the construction of the house that embodies the invention is comprised of the following steps: a) providing at least four floor frame segments 31 and a plurality of floor joists 33 to form a floor frame 3; b) operatively joining the frame segments 31 and the floor joists 33 together through an adhesive 4 to form the said floor frame 3 with four floor frame corners 32; c) providing a floor board 5 which includes at least one floor panel 51, at least four floor edges 52 that define the shape of the floor board, and four floor corners 53 where the respective floor edges connect; d) operatively fixing the said floor board 5 to the floor frame 3 through the adhesive 4; e) providing a plurality of bottom plates 6; f) joining the respective ends of the bottom plates 6 through the adhesive 4 to form at least four bottom plate corners 61 to correspond to the four floor corners 53 of the floor board 5; g) fixing the bottom plates 6 to the floorboard 5, along the floor edges 52, through the adhesive 4; h) providing a plurality of studs 7; i) attaching the said studs 7 to the bottom plate corners 61 and the bottom plates 6 through the adhesive 4; j) providing a plurality of wall panels 9; k) operatively fixing the said wall panels 9 to the corresponding bottom plates 6 and studs 7 through the adhesive 4; l) providing at least four outer rafters 121 and a plurality of inner rafters 123 to form a roof frame 12; m) operatively joining the outer rafters 121 and the inner rafters 123 together through the adhesive 4 to form the said roof frame 12 with at least four roof frame corners 122; n) operatively fixing the said roof frame 12 to the studs 7 and wall panels 9 through the said adhesive 4; o) providing a roof board 13 which includes at least one roof panel 131; and p) operatively fixing the said roof board onto the roof frame 12 through the adhesive 4. For the preferred configuration of the house, the construction comprises the following steps: a) providing at least four corner pedestals 21, at least one middle pedestal 22, at least one center pedestal 23, at least four corner anchor plates 24, at least one middle anchor plate 25, and a center anchor plate 26 to form a base 2; b) arranging the four corner pedestals 21 to indicate a polygonal shape, with a portion buried into the ground and a portion extending two feet from the ground; c) positioning the middle pedestals 22 between each adjacent pair of corner pedestals 21, with a portion buried into the ground and a portion extending two feet from the ground; d) positioning the center pedestal 23 at a substantially equal distance from the corner pedestals 21, with a portion buried into the ground and a portion extending two feet from the ground; e) operatively fixing the corner anchor plates 24 on the corner pedestals 21, the middle anchor plates 25 on the middle pedestals 22, and the center anchor plate 26 on the center pedestal 23; f) providing at least four floor frame segments 31 and a plurality of floor joists 33 to form a floor frame 3; g) operatively joining the frame segments 31 and the floor joists 33 together through an adhesive 4 to form the said floor frame 3 with four floor frame corners 32 that correspond to the four corner pedestals 21; h) operatively fixing the floor frame 3 on the base 2; i) providing a floor board 5 which includes at least one floor panel 51, at least four floor edges 52 that define the shape of the floor board, and at least four floor corners 53 where the respective floor edges connect; j) operatively fixing the said floor board 5 to the floor frame 3 through the adhesive 4; k) providing a plurality of bottom plates 6; l) joining the respective ends of the bottom plates 6 through the adhesive 4 to form at least four bottom plate corners 61 to correspond to the four floor corners 53 of the floor board 5; m) fixing the bottom plates 6 to the floorboard 5, along the floor edges 52, through the adhesive 4; n) providing a plurality of studs 7; o) operatively attaching the said studs 7 to the bottom plate corners 61 and the bottom plates 6 through the adhesive 4; p) providing at least one horizontal house door frame segment 81 and at least one vertical house door frame segment 82 to form at least one house door frame 8; q) operatively attaching one end of the horizontal house door frame segment 81 to one stud 7 and the other end to another stud 7 through the adhesive 4; r) operatively attaching one end of the vertical house door frame segment 82 to one bottom plate 6 and the other end to the horizontal door frame segment 81 through the adhesive 4; s) providing a plurality of wall panels 9; t) operatively fixing the said wall panels 9 to the corresponding bottom plates 6 and studs 7 through the adhesive 4; u) forming at least one awning window 10 on at least one wall panel 9; v) providing an awning window frame 101 to support the awning window 10; w) operatively fixing the awning window frame 101 to the corresponding wall panel 9; x) forming at least one exhaust window 102 on at least one wall panel 9; y) providing an exhaust window frame 103 to support the exhaust window 102; z) operatively fixing the exhaust window frame 103 to the corresponding wall panel 9; aa) forming at least one house doorway 11 on the corresponding wall panel 9 that conforms to the house door frame 8; bb) providing at least four outer rafters 121 and a plurality of inner rafters 123 to form a roof frame 12; cc) operatively joining the outer rafters 121 and the inner rafters 123 together through the adhesive 4 to form the said roof frame 12 with at least four roof frame corners 122; dd) operatively fixing the said roof frame 12 to the studs 7 and wall panels 9 through the said adhesive 4; ee) providing a roof board 13 which includes at least one roof panel 131; ff) operatively fixing the said roof board 13 onto the roof frame 12 through the adhesive 4; gg) providing at least one awning window panel 14 and at least one house door panel 15; and hh) operatively attaching the awning window panel 14 to the corresponding wall panel 9 as a cover for the awning window 10, and operatively attaching the house door panel 15 to the house door frame 8. In another preferred configuration of the house 1, the construction further comprises the following steps: ii) providing a stair platform 161, a plurality of stair columns 162 adapted to elevate the stair platform 161, a stair handrail 163 formed on the stair platform 161, at least one stair step 164 positioned lower than the stair platform 161, and at least two stair slopes 165 adapted to support the stair step 164; jj) operatively joining together, through the adhesive 4, the stair platform 161, the stair columns 162, the stair handrail 163, the stair step 164, and the stair slopes 165 to form a stair assembly 16; and kk) operatively attaching the stair assembly 16 to the house doorway 11 through the adhesive 4. In yet another preferred configuration of the house 1, the construction further comprises the following steps: ll) providing a plurality of bedroom dividers 206, and at least two bedroom doors 207 to form a master bedroom 201 and a second bedroom 202; and mm) providing a toilet-bathroom divider 208 and a toilet-bathroom door 209 to form a toilet-bathroom 203. Example Cost Estimate of Construction of a House Unit in the Philippines As shown in the above cost estimate Table, construction of a house unit in the Philippines following the present invention as defined above may be considered to provide low-cost housing, such as, in the amount of Php 154,754. Based on current reports from government agencies with mandates involving the housing industry, the need and categories of housing types in the Philippines are as follows: Total New Need Average: 345,941 housing units per year

Claims

CLAIMS What is claimed is: 1. A method for construction of building unit comprising the steps of: a) providing at least four floor frame segments (31) and a plurality of floor joists (33) to form a floor frame (3); b) operatively joining the frame segments (31) and the floor joists (33) together by applying an adhesive (4) on the surfaces being joined together to form the said floor frame (3) with four floor frame corners (32); c) providing a floor board (5) which includes at least one floor panel (51), at least four floor edges (52) that define the shape of the floor board, and four floor corners (53) where the respective floor edges connect; d) operatively fixing the said floor board (5) to the floor frame (3) by applying the adhesive (4) on the surfaces being joined together; e) providing a plurality of bottom plates (6); f) joining the respective ends of the bottom plates (6) by applying the adhesive (4) on the surfaces being joined together to form at least four bottom plate corners (61) to correspond to the four floor corners (53) of the floor board (5); g) fixing the bottom plates (6) to the floorboard (5), along the floor edges (52), by applying the adhesive (4) on the surfaces being joined together; h) providing a plurality of studs (7); i) attaching the said studs (7) to the bottom plate corners (61) and the bottom plates (6) by applying the adhesive (4) on the surfaces being joined together; j) providing a plurality of wall panels (9); k) operatively fixing the said wall panels (9) to the corresponding bottom plates (6) and studs (7) by applying the adhesive (4) on the surfaces being joined together; l) providing at least four outer rafters (121) and a plurality of inner rafters (123) to form a roof frame (12); m) operatively joining the outer rafters (121) and the inner rafters (123) together by applying the adhesive (4) on the surfaces being joined together to form the said roof frame (12) with at least four roof frame corners (122); n) operatively fixing the said roof frame (12) to the studs (7) and wall panels (9) by applying the said adhesive (4) on the surfaces being joined together; o) providing a roof board (13) which includes at least one roof panel (131); and p) operatively fixing the said roof board (13) onto the roof frame (12) by applying the adhesive (4) on the surfaces being joined together.

2. The method according to claim 1, wherein the floor panels (51), the wall panels (9), and the roof panels (131) are made of a composite board (100) comprising a fiber cement board (20) and a plywood board (30) joined together by the adhesive (4).

3. The method according to claim 2, wherein the floor frame (3), the bottom plates (6), the studs (7), and the roof frame (12) are made of laminated veneer lumber.

4. The method according to claim 1 for constructing a house unit wherein the steps further comprises: a) providing at least four corner pedestals (21), at least one middle pedestal (22), at least one center pedestal (23), at least four corner anchor plates (24), at least one middle anchor plate (25), and at least one center anchor plate (26) to form a base (2); b) arranging the four corner pedestals (21) to indicate a polygonal shape, with a portion buried into the ground and a portion extending up from the ground; c) positioning the middle pedestals (22) between each adjacent pair of corner pedestals (21), with a portion buried into the ground and a portion extending up from the ground; d) positioning the center pedestal (23) at a substantially equal distance from the corner pedestals (21), with a portion buried into the ground and a portion extending up from the ground; e) operatively fixing the corner anchor plates (24) on the corner pedestals (21), the middle anchor plates (25) on the middle pedestals (22), and the center anchor plate (26) on the center pedestal (23); f) providing at least four floor frame segments (31) and a plurality of floor joists (33) to form a floor frame (3); g) operatively joining the frame segments (31) and the floor joists (33) together through an adhesive (4) to form the said floor frame (3) with four floor frame corners (32) that correspond to the four corner pedestals (21); h) operatively fixing the floor frame (3) on the base (2); i) providing a floor board (5) which includes at least one floor panel (51), at least four floor edges (52) that define the shape of the floor board, and at least four floor corners (53) where the respective floor edges connect; j) operatively fixing the said floor board (5) to the floor frame (3) through the adhesive (4); k) providing a plurality of bottom plates (6); l) joining the respective ends of the bottom plates (6) through the adhesive (4) to form at least four bottom plate corners (61) to correspond to the four floor corners (53) of the floor board (5); m) fixing the bottom plates (6) to the floorboard (5), along the floor edges (52), through the adhesive (4); n) providing a plurality of studs (7); o) operatively attaching the said studs (7) to the bottom plate corners (61) and the bottom plates (6) through the adhesive (4); p) providing at least one horizontal house door frame segment (81) and at least one vertical house door frame segment (82) to form at least one house door frame (8); q) operatively attaching one end of the horizontal house door frame segment (81) to one stud (7) and the other end to another stud (7) through the adhesive (4); r) operatively attaching one end of the vertical house door frame segment (82) to one bottom plate (6) and the other end to the horizontal door frame segment (81) through the adhesive (4); s) providing a plurality of wall panels (9); t) operatively fixing the said wall panels (9) to the corresponding bottom plates (6) and studs (7) through the adhesive (4); u) forming at least one awning window (10) on at least one wall panel (9); v) providing an awning window frame (101) to support the awning window (10); w) operatively fixing the awning window frame (101) to the corresponding wall panel (9); x) forming at least one exhaust window (102) on at least one wall panel (9); y) providing at least one exhaust window frame (103) to support the exhaust window (102); z) operatively fixing the exhaust window frame (103) to the corresponding wall panel (9); aa) forming at least one house doorway (11) on the corresponding panel wall (9) that conforms to the house door frame (8); bb) providing at least four outer rafters (121) and a plurality of inner rafters (123) to form a roof frame (12); cc) operatively joining the outer rafters (121) and the inner rafters (123) together through the adhesive (4) to form the said roof frame (12) with at least four roof frame corners (122); dd) operatively fixing the said roof frame (12) to the studs (7) and wall panels (9) through the said adhesive (4); ee) providing a roof board (13) which includes at least one roof panel (131); ff) operatively fixing the said roof board (13) onto the roof frame (12) through the adhesive (4); gg) providing at least one awning window panel (14) and at least one house door panel (15); and hh) operatively attaching the awning window panel (14) to the corresponding wall panel (9) as a cover for the awning window (10), and operatively attaching the house door panel (15) to the house door frame (8).

5. The method according to claim 4, wherein the floor panels (51), the wall panels (9), the roof panels (131), the awning window panel (14), and the house door panel (15) are made of a composite board (100) comprising a fiber cement board (20) and a plywood board (30) joined together by the adhesive (4).

6. The method according to claim 5, wherein the floor frame (3), the bottom plates (6), the studs (7), the roof frame (12), the house door frame (8), the awning window frame (101), and the exhaust window frame (103) are made of laminated veneer lumber.

7. The method according to claim 6, further comprising the steps of: ii) providing a stair platform (161), a plurality of stair columns (162) adapted to elevate the stair platform (161), a stair handrail (163) formed on the stair platform (161), at least one stair step (164) positioned lower than the stair platform (161), and at least two stair slopes (165) adapted to support the stair step (164); jj) operatively joining together, through the adhesive (4), the stair platform (161), the stair columns (162), the stair handrail (163), the stair step (164), and the stair slopes (165) to form a stair assembly (16); and kk) operatively attaching the stair assembly (16) to the house doorway (11) through the adhesive (4).

8. The method according to claim 7, wherein the stair platform (161) and the stair step (164) are made of the composite board (101); and the stair columns (162), the stair handrail (163), and the stair slopes (165) are made of laminated veneer lumber.

9. The method according to claim 8, further comprising the steps of: ll) providing a plurality of bedroom dividers (206), and at least two bedroom doors (207) to form a master bedroom (201) and a second bedroom (202); and mm) providing a toilet-bathroom divider (208) and a toilet-bathroom door

10. The method according to claim 9, wherein the bedroom dividers (206), the bedroom doors (207), the toilet-bathroom divider (208), and the toilet- bathroom door (209) are made of a combination of laminated veneer lumber and the composite board (100) and joined together by the adhesive (4).

11. A house unit constructed according to the method in claim 1, comprising: a floor frame (3) which includes at least four floor frame segments (31) and a plurality of floor joists (33) operatively joined together through an adhesive (4) to form the said floor frame (3) with four floor frame corners (32); a floor board (5) which includes at least one floor panel (51), at least four floor edges (52) that define the shape of the floor board, and four floor corners (53) where the respective floor edges connect, the said floor board (3) being operatively fixed to the floor frame through the adhesive (4); a plurality of bottom plates (6) with their respective ends joined together through the adhesive (4) to form at least four bottom plate corners (61) to correspond to the four floor corners (53) of the floor board (5), the said bottom plates (6) being operatively fixed to the floorboard (5), along the floor edges (52), through the adhesive (4); a plurality of studs (7) operatively attached to the bottom plate corners (61) and the bottom plates (6) through the adhesive (4); a plurality of wall panels (9) operatively fixed to the corresponding bottom plates (6) and studs (7) through the adhesive (4); a roof frame (12) which includes at least four outer rafters (121) and a plurality of inner rafters (123), the said outer rafters (121) and the inner rafters (123) being joined together through the adhesive (4) to form the said roof frame (12) with at least four roof frame corners (122), and the said roof frame (12) being operatively fixed to the studs (7) and wall panels (9) through the said adhesive (4); and a roof board (13) which includes at least one roof panel (131), the said roof board (13) being operatively fixed onto the roof frame (12) through the adhesive (4).

12. The house unit according to claim 11, wherein the floor panels (51), the wall panels (9), and the roof panels (131) are made of a composite board (100) comprising a fiber cement board (20) and a plywood board (30) joined together by the adhesive (4).

13. The house unit according to claim 12, wherein the floor frame (3), the bottom plates (6), the studs (7), and the roof frame (12) are made of laminated veneer lumber.

14. A house unit constructed according to the method in claim 4, comprising: a base (2) which includes at least four corner pedestals (21) arranged to indicate a polygonal shape, with a portion buried into the ground and a portion extending up from the ground; at least one middle pedestal (22) positioned between each adjacent pair of corner pedestals (21), with a portion buried into the ground and a portion extending up from the ground; at least one center pedestal (23) positioned at a substantially equal distance from the corner pedestals (21), with a portion buried into the ground and a portion extending up from the ground; at least four corner anchor plates (24) operatively fixed on the corner pedestals (21); at least one middle anchor plate (25) operatively fixed on the middle pedestals (22); and a center anchor plate (26) operatively fixed on the center pedestal (23); a floor frame (3) which includes at least four floor frame segments (31) and a plurality of floor joists (33) operatively joined together through an adhesive (4) to form the said floor frame (3) with four floor frame corners (32) that correspond to the four corner pedestals (21), the said floor frame (3) being operatively fixed on the base (2); a floor board (5) which includes at least one floor panel (51), at least four floor edges (52) that define the shape of the floor board, and four floor corners (53) where the respective floor edges connect, the said floor board (3) being operatively fixed to the floor frame through the adhesive (4); a plurality of bottom plates (6) with their respective ends joined together through the adhesive (4) to form at least four bottom plate corners (61) to correspond to the four floor corners (53) of the floor board (5), the said bottom plates (6) being operatively fixed to the floorboard (5), along the floor edges (52), through the adhesive (4); a plurality of studs (7) operatively attached to the bottom plate corners (61) and the bottom plates (6) through the adhesive (4); at least one house door frame (8) which includes at least one horizontal house door frame segment (81) and at least one vertical house door frame segment (82), one end of the horizontal house door frame segment (81) being operatively attached to one stud (7) and the other end to another stud (7) through the adhesive (4), and one end of the vertical house door frame segment (82) being operatively attached to one bottom plate (6) and the other end to the horizontal door frame segment (81) through the adhesive (4); a plurality of wall panels (9) operatively fixed to the corresponding bottom plates (6) and studs (7) through the adhesive (4); at least one awning window (10) formed on at least one wall panel (9), and at least one awning window frame (101) operatively fixed to the corresponding wall panel (9) to support the awning window (10); at least one exhaust window (102) formed on at least one wall panel (9), and at least one exhaust window frame (103) operatively fixed to the corresponding wall panel (9) to support the exhaust window (102); at least one house doorway (11) formed on the corresponding wall panel (9) and conforms to the house door frame (8); a roof frame (12) which includes at least four outer rafters (121) and a plurality of inner rafters (123), the said outer rafters (121) and the inner rafters (123) being joined together through the adhesive (4) to form the said roof frame (12) with at least four roof frame corners (122), and the said roof frame (12) being operatively fixed to the studs (7) and wall panels (9) through the said adhesive (4); a roof board (13) which includes at least one roof panel (131), the said roof board (13) being operatively fixed onto the roof frame (12) through the adhesive (4); at least one awning window panel (14) operatively attached to the corresponding wall panel (9) as a cover for the awning window (10); and at least one house door panel (15) operatively attached to the house door frame (8).

15. The house unit according to claim 14, wherein the floor panels (51), the wall panels (9), the roof panels (131), the awning window panel (14), and the house door panel (15) are made of a composite board (100) comprising a fiber cement board (20) and a plywood board (30) joined together by the adhesive (4).

16. The house unit according to claim 15, wherein the floor frame (3), the bottom plates (6), the studs (7), the roof frame (12), the house door frame (8), the awning window frame (101), and the exhaust window frame (103) are made of laminated veneer lumber.

17. The house unit according to claim 16, further comprising: a stair assembly (16) which includes a stair platform (161), a plurality of stair columns (162) adapted to elevate the stair platform (161), a stair handrail (163) formed on the stair platform (161), at least one stair step (164) positioned lower than the stair platform (161), and at least two stair slopes (165) adapted to support the stair step (164), the stair platform (161), the stair columns (162), the stair handrail (163), the stair step (164), and the stair slopes (165) being formed and joined together through the adhesive (4), and the said stair assembly (16) being operatively attached to the house doorway (11) through the adhesive (4).

18. The house unit according to claim 17, wherein the stair platform (161) and the stair step (164) are made of the composite board (101); and the stair columns (162), the stair handrail (163), and the stair slopes (165) are made of laminated veneer lumber.

19. The house unit according to claim 18, further comprising: a plurality of bedroom dividers (206) and at least two bedroom doors (207) operatively attached to the floor board (5) and the corresponding studs (7) to form a master bedroom (201) and a second bedroom (202); and a toilet-bathroom divider (208) and a toilet-bathroom door (209) operatively attached to the floor board (5) and the corresponding studs (7) to form a toilet-bathroom (203).

20. The house unit according to claim 19, wherein the bedroom dividers (206), the bedroom doors (207), the toilet-bathroom divider (208), and the toilet-bathroom door (209) are made of a combination of laminated veneer lumber and the composite board (100) and joined together by the adhesive (4).