JPH09105182A - Ventilation building construction for field spray-injection heat-insulating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase in cost, and to shorten the term of works by sticking a sheet having shape retention on the outside of a column, a stud, etc., to install a siding to the external shape of the sheet and forming a field spray-infection heat-insulating material layer on the inside of the sheet. SOLUTION: A sheet 2 having shape retention such as felt paper is stuck on the exterior wall side of the columns-studs 1, 1, etc., of a wooden house, and a siding 4 is mounted on the outside of the sheet 2 through furring strips 3. A field spray-injection heat-insulating material layer 5 is formed on the inside of the sheet 2 having shape retention. The field spray-injection heat-insulating material layer 5 is selected from spray rock wool, blowing wool, spray cellulose fibers, a spray urethane foam, a spray urea foam, an injected urethane foam, an injection urea foam, etc. Accordingly, a lining paper process is omitted and cost is reduced, and the term of works can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation construction method for in-situ spraying / injecting heat insulating material used for buildings such as general houses and buildings, and to obtain an outer wall excellent in windproof, waterproof, moistureproof and heat insulating properties. It is intended to provide a ventilation construction method for in-situ spraying / injecting heat insulating material that can be achieved.

[0002]

2. Description of the Related Art As a conventional ventilation method used for buildings such as ordinary houses, as shown in FIG. 4, a waterproof, windproof, and moisture permeable sheet 32 is attached to the outer wall side of a pillar or stud 31 of a wooden house. In general, the outermost siding 34 is installed on the outer side of the siding 34 via the vertical furring strip 33.

Further, in order to improve the heat insulating property of a wooden house, it has been customary in recent years to use a mat-like heat insulating material of inorganic fiber such as glass wool or rock wool between the columns and studs 31, but the fiber type heat insulating material. Water absorption, which is a characteristic of the above, has become a problem, and a spraying / injection method of a foamed plastic heat insulating material has recently been used.

[0004]

However, in the above conventional ventilation and heat insulating construction method, in the case of spraying, as shown in FIG. 5, the waterproof, windproof and moisture permeable sheet 32 is wavy due to spraying of the foamed plastic heat insulating material 35. Becomes the ventilation layer 36
However, there was a drawback that it could not be secured.

Similarly, in the case of injection, as shown in FIG.
Windproof / breathable sheet 32 is made of foamed plastic insulation 3
However, there was a drawback in that the ventilation layer 36 could not be secured, because it was pressed against the siding 34 side by the pressure at the time of injection. 37 is a frame plate for injection.

As shown in FIG. 7, these problems are waterproof, windproof, and
The veneer plate, plywood, cardboard or other plate-like base 38 is provided on the inside of the moisture permeable sheet 32, and the surface thereof is sprayed or injected with the foamed plastic heat insulating material 35 to solve the problem. However, the number of work steps for applying the base before the spraying / injecting work is increased, which causes a cost increase in terms of materials and labor, and also has a drawback that the construction period is extended.

The present invention is intended to eliminate the drawbacks of the conventional ventilation and heat insulation construction method. Since the step of attaching the undercoat can be omitted, the cost rise can be prevented, and the on-site spraying / injection heat insulation can be carried out in a short construction period. It is intended to provide a ventilation structure for materials.

[0008]

[Means for Solving the Problems] That is, according to the ventilation construction method for in-situ spraying / injecting heat insulating material of the present invention, a sheet having a shape-retaining property is attached to the outer wall side of a pillar or stud of a wooden house, and the outside thereof Attach siding through the vertical furring,
It is characterized by forming an on-site spraying / injection heat insulating material layer inside the shape-retaining sheet.

Further, the ventilation construction method for in-situ spraying / injecting heat insulating material of the present invention is also characterized in that the shape-retaining sheet is felt paper.

In the above, the felt paper has a moisture permeability resistance of about 5
It is desirable to be around m ² hmmHg / g.

Further, according to the present invention, there is provided a ventilation structure for in-situ spraying / injecting heat insulating material, wherein the in-situ spraying / injecting heat insulating material layer comprises sprayed rock wool, blowing wool, sprayed cellulose fiber, sprayed urethane foam, sprayed urea foam, injected foamed urethane, It is also characterized by being selected from injection urea foam.

In the above, urethane foam has a moisture permeability resistance of about 3
It is preferably 0 m ² hmmHg / g or more.

The ventilation construction method for in-situ spraying / injecting heat insulating material according to the present invention has a thermal conductivity of 0.1 kca as the vertical furring strip.
It is also characterized in that the heat / cold bridge is eliminated by using a highly insulating material of 1 / mh ° C.

Further, according to the ventilation construction method for in-situ spraying / injecting heat insulating material of the present invention, a sheet having a shape-retaining property is pasted on the outer wall side of the pillar, stud, etc. of a wooden house through a heat insulating packing, and the outside thereof is attached to the outside. Is attached to the siding through the vertical furring, and the inside of the sheet with shape retention is sprayed on site.
It is also characterized in that an injection heat insulating material layer is formed.

[0015]

With the above construction of the ventilation construction method for in-situ spraying / injecting heat insulating material according to the present invention, the step of attaching the undercoat can be omitted, so that the cost can be prevented from increasing and the construction period can be shortened. .

Further, the shape-retaining sheet is integrated with the heat insulating material to form a plate-like sheet as the heat insulating material hardens, and its water absorption does not pose a problem, and is excellent in windproofing, waterproofing, moisture proofing, and heat insulating properties. The outer wall can be obtained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the ventilation structure for in-situ spraying / injecting heat insulating material of the present invention will be described in detail below with reference to the drawings.

1 and 2 show the outer wall structure of a wooden house to which the present invention is applied. In FIG. 1, a sheet 2 having a shape-retaining property is attached to the outer wall side of a pillar or stud 1 of the wooden house, The outermost wall siding 4 is provided on the outer side of the siding 4 via a vertical furring strip 3.

Felt paper is a suitable example of the shape-retaining sheet 2. This felt paper is inexpensive and has good compatibility with a heat insulating material such as urethane sprayed on site, which will be described later, and can be suitably used. By the way, in the case of felt paper, it has a relatively low moisture permeability resistance of 16 kg / m ^3.
The most suitable one (about 5 m ² hmmHg / g) is most suitable. If it can withstand spraying / injection, it will be integrated into a plate-like shape as the heat insulating material hardens, so that the problem of water absorption does not occur.

In addition, even if moisture enters the wall from the inside of the room, the moisture permeability resistance value of urethane foam is about 30 m ^2.
About 5m ² hmmH of felt paper against hmmHg / g
Since it is g / g, since it is composed of a ratio of 6: 1 toward the outside, it is easy for moisture to escape to the outside ventilation layer.

Wood is generally used for the vertical furring strips 3, but if a high heat insulating material having a thermal conductivity of 0.1 kcal / mh ° C. or less is used, a cold / heat bridge for indoor / outdoor use can be provided via the pillars / studs 1. Can be prevented. As the highly heat-insulating material, synthetic wood having closed cells, foamed molded articles, and other materials having a thermal conductivity of 0.1 kcal / mh ° C. or less can be preferably used.

On the inner surface side of the shape-retaining sheet 2,
As shown in FIG. 2, a heat insulating material layer 5 made of urethane foam or the like sprayed on site is formed. As the heat insulating material layer 5, sprayed rock wool, blowing wool, sprayed cellulose fiber, sprayed urethane foam, sprayed urea foam,
It can be selected from the group consisting of injection urethane foam, injection urea foam and the like.

Particularly in the case of urethane foam sprayed on site, the thermal conductivity is 0.021 to 0.045 and the moisture vapor transmission resistance is 25 to 4.
About 5 m ² hmmHg / g, especially 30 m ² hmmHg
/ G or more is desirable.

In the operation of spraying the heat insulating material layer 5, the shape-retaining sheet 2 is hardly deformed, and the ventilation layer 6 is reliably held between the shape-retaining sheet 2 and the siding 4. Can be made.

In the above-mentioned embodiment for explaining the in-situ blowing / injecting heat insulating material ventilation construction method of the present invention, the in-situ blowing urethane foam blowing method has been described as an example. However, as shown in FIG. 6, an injecting frame plate is used. By doing so, it goes without saying that an injection method using injection foam urethane or the like can be adopted.

FIG. 3 shows another embodiment of the ventilation structure for in-situ spraying / injecting heat insulating material of the present invention. In this embodiment, a sheet 2 having a shape-retaining property is attached to the outer wall side of the pillars / studs 1 of a wooden house via a heat insulating packing 7. As the heat insulating packing 7, urethane board can be preferably used.

A ventilation layer 6 is provided on the outer side of the shape-retaining sheet 2 by attaching a siding 4 via a vertical furring strip 3, and on the inside of the shape-retaining sheet 2 is a site. A spray / injection heat insulating material layer 5 is formed.

In this way, by attaching the sheet 2 having the shape-retaining property to the outer wall side of the pillars / studs 1 or the like via the heat insulating packing 7, the heat insulating packing 7 and the on-site spraying / injecting heat insulating material layer 5, especially on the site. This is a particularly effective construction method in cold regions, etc., because it can be integrated with sprayed urethane foam and completely eliminate the cold heat bridge.

[0029]

EFFECTS OF THE INVENTION Since the ventilation construction method for in-situ spraying / injecting heat insulating material of the present invention is constructed as described above, it is possible to prevent the cost increase due to the omission of the step of applying the groundwork, and the construction period can be shortened. You can

The shape-retaining sheet is integrated with the heat-insulating material to form a plate-like sheet as the heat-insulating material hardens, and its water absorption does not pose a problem and is excellent in windproof, waterproof, moisture-proof and heat-insulating properties. The outer wall can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view before spraying showing an embodiment of a ventilation construction method for a field spraying / injecting heat insulating material of the present invention.

FIG. 2 is a schematic cross-sectional view showing a completed state.

FIG. 3 is a schematic sectional view showing another embodiment.

FIG. 4 is a schematic cross-sectional view showing a conventional example before spraying and injection.

FIG. 5 is a schematic cross-sectional view showing a spraying state of a conventional example.

FIG. 6 is a schematic sectional view showing an injection state of a conventional example.

FIG. 7 is a schematic cross-sectional view showing another conventional example.

[Explanation of symbols]

 1 Pillar and stud 2 Shape-retaining sheet 3 Vertical furring strip 4 Siding 5 Insulating material layer 6 Ventilation layer 7 Insulation packing 31 Pillar / studs 32 Waterproof, windproof and moisture permeable sheet 33 Vertical furring strip 34 Siding 35 Foamed plastic heat insulation Material 36 Ventilation layer 37 Frame plate for injection 38 Base

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area E04B 2/56 645 E04B 2/56 645B

Claims (4)

[Claims] 1. A shape-retaining sheet is attached to the outer wall side of a pillar or stud of a wooden house, and siding is attached to the outside through a vertical furring strip, and inside the shape-retaining sheet. Is a ventilation construction method for in-situ spraying / injection insulation, which is characterized by forming an on-site spraying / injection insulation layer. 2. The ventilation construction method for in-situ spraying / injecting heat insulating material according to claim 1, wherein the shape-retaining sheet is felt paper. 3. The in-situ spraying / injecting heat insulating material layer is selected from spraying rock wool, blowing wool, spraying cellulose fiber, spraying urethane foam, spraying urea foam, injection foaming urethane, injection urea foam and the like. Ventilation method for on-site spraying / injection heat insulating material according to any one of 4 above. 4. A shape-retaining sheet is attached on the outer wall side of a pillar, stud, etc. of a wooden house via heat-insulating packing, and siding is attached to the outside through a vertical furring strip and the shape-retaining property is maintained. A ventilation construction method for in-situ spraying / injection heat insulating material characterized by forming a layer of in-situ spraying / injection heat insulating material inside the sheet with