JPH07145643A - External heat insulation method in wooden residence - Google Patents

Abstract

PURPOSE:To promote execution efficiency by making weak heat conductive members lie between a column and an exterior wall material, and forming spray foam heat insulating materials on the rear of the exterior wall material from an indoor side directly before the execution of an interior wall material. CONSTITUTION:An exterior wall material 7 is insulated from a column 3 and studs 4 through columnar grounds 9 formed of weak heat conductive members such as polyethylene, etc., and is mounted. Foamable liquid 13 is sprayed to the exterior wall material 7 in a laminar-shape from a spray gun 12, it is foamed in a site, and a heat insulation air-tight layer 14 is formed of the grounds 9 and spray foam heat insulating materials 8. In addition, an interior wall material 10 is mounted to the column 3, and an air layer 11 is formed between the column 3 and spray foam heat insulating materials 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulation technique for a wooden house, and more particularly to an external heat insulation method for a wooden house.

[0002]

2. Description of the Related Art As a heat insulating structure in a wooden house, there are an inner heat insulating method and an outer heat insulating method. As an external heat insulation method, it is generally known that the following heat insulation layer is attached to the back surface side of the outer wall material. A heat insulation layer in which a styrene foam or urethane foam heat insulating plate is laminated on the back surface of the outer wall material. A heat insulating layer formed by combining glass wool and poly film.

[0003]

Problems to be Solved by the Invention The above-described conventional heat insulation technique has the following problems.

<B> In the heat insulation layer in which styrene foam or urethane foam heat insulating plates are laminated, it takes a lot of time and labor for the site worker, and the construction period and construction cost increase. In addition to this, styrene foam has a large shrinkage ratio,
It has been pointed out that a gap is likely to occur in the heat insulating layer after the construction.

<B> In the case of a heat insulating layer formed by a combination of glass wool and poly film, in order to fix the heat insulating layer by driving in the brain nail from the inner wall material side, shrinkage of the wood,
A gap is likely to occur due to the movement of the building. Further, the brain nail penetrates the glass wool and the poly film and moisture enters into the glass wool, so that the heat insulating property, the airtightness, and the durability decrease with the passage of time.

<C> As a problem common to both,
Wooden houses usually have a structure in which reinforcing members such as studs are interposed between the outer wall material and the inner wall material, and since the heat insulating layer is arranged avoiding the installation positions of these reinforcing members, continuity is maintained. do not have. Therefore, heat is easily transmitted through the reinforcing member.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an external heat insulating method for a wooden house, which has excellent workability and can improve the heat insulating effect. It is in.

[0008]

SUMMARY OF THE INVENTION The present invention provides a method for external heat insulation of a wooden house in which a heat insulating material is laminated on the back surface side of an outer wall material to form an air layer between the heat insulating material and the inner wall material. A weak heat conductive member is interposed between the outer wall materials, and immediately before construction of the inner wall material, a spray foam insulation material is formed on the back surface of the outer wall material from the indoor side, and the weak heat conductive material is formed on the back surface of the outer wall material. An external heat insulating method in a wooden house, characterized in that a continuous heat insulating airtight layer is formed by a member and a spray foam heat insulating material.

[0009]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.

<B> Framework of wooden house Fig. 1 shows an example of the heat insulating structure of the wall of the wooden house.
2 and 3 show sectional views of the wall portion of the wooden house. The frame of a wooden house will be briefly described with reference to FIGS. 2 and 3. A wooden base 2 is horizontally mounted on a foundation 1 made of concrete or the like, and a pillar 3 or a stud 4 is predetermined on the base 2. Are erected at intervals. Between the upper portions of the pillars 3 and the studs 4, a body difference 5 is horizontally installed to support a roof 6. The above is a known structure.

<B> Wall Heat Insulation Structure The outer wall material 7 is attached while being insulated from the columns 3 and the studs 4 via the columnar base material 9. The base material 9 is composed of a weakly heat-conductive member in consideration of heat conduction.
For example, it is possible to use a hard resin heat insulating material such as polystyrene or polyurethane, or a material obtained by integrating these hard resin heat insulating materials and base wood with an adhesive or the like. Such a base material 9 is attached to each of the columns 3, the studs 4, and the outer wall member 7 by a known means such as bonding or nailing. Further, the inner wall material 10 is attached to the inside of the pillar 3 or the stud 4 at a certain distance from the spray foam heat insulating material 8, and the spray foam heat insulating material 8
An air layer 11 is formed between the inner wall member 10 and the inner wall member 10.

[0012]

[Operation] Next, a method for constructing the spray foam insulation will be described. <A> Construction timing of the spray foam insulation material As described above, the outer wall material 7 to which the heat insulation material has been previously attached is attached as the outer insulation method of the wall portion until now. In this embodiment, the base 2, the pillar 3, the stud 4, the roof 6,
The spray foam heat insulating material 8 is applied at the stage where the attachment of the outer wall material 7 and fittings for the window opening is completed and only the attachment of the inner wall material 10 is left.

<B> Method for Forming Spray Foam Insulation Material As shown in FIG. 1, the spray foam insulation material 8 is formed by in-situ foaming by spraying the foaming liquid 13 in layers from the spray gun 12 toward the outer wall material 7. When constructing the spray foam insulation 8, it is essential to form a weakly heat-conductive base 9 on the outside of the pillar 37 or the stud 4 (on the side of the outer wall material 7) and a continuous heat-insulating airtight layer 14 of the spray foam insulation 8. Is. In actual construction, multiple layers of 25 cm or less should be sprayed. By performing multiple spraying, a resinized skin layer is formed on the surface of each layer, and in combination with urethane foam which is closed cells, a highly airtight spray foam insulation 8 is obtained. When forming the spray foam insulation 8,
It is necessary to cure the foam 2, so that the foaming liquid 13 does not adhere to the entire surface of the wood such as the base 2, the pillars 3, the studs 4, and the body difference 5. This is to dissipate water from the wood. As a measure against this,
For example, a method of coating the surface of the wood with a sheet member before spraying the foaming liquid 13 is suitable. Further, as the foaming liquid 13, foamed plastic foam such as polyurethane foam, polyisocyanurate foam, and phenol foam is preferable from the viewpoint of heat insulation performance and workability. Furthermore, although the spray foam insulation 8 is required to have heat insulation and airtightness, the strength performance such as compression and tension is not particularly required. Be able to follow.

<C> Reason for spraying from the indoor side The spray foam insulating material 8 may be constructed from the outside of the building. However, the blowing work from the outside requires time and effort for assembling and disassembling the work scaffold, and the foaming is easily affected by weather, temperature and humidity, etc., and stable construction is difficult. Such inconvenience can be solved at once by spraying from inside the building.

<D> Adiabatic Performance Next, the adiabatic performance will be considered. In FIG. 3, a continuous heat insulating airtight layer 14 is formed inside the outer wall material 7, and an air layer 11 is further formed between the heat insulating airtight layer 14 and the inner wall material 10. In addition, a base 9 having weak heat conductivity is interposed between the pillars or studs 4 and the outer wall member 7 to provide heat conductive insulation. Therefore, it exhibits high heat insulation performance.

[0016]

[Embodiment 2] In the above-mentioned embodiment, the case where the foaming liquid is directly sprayed onto the outer wall material 7 has been described. The heat insulating material 8 may be formed.
According to the present embodiment, since the heat insulating airtight layer 14 and the outer wall material 7 are separated, the replacement work of the outer wall material 7 can be easily performed, and the heat insulation rework after the replacement is unnecessary.

[0017]

Since the present invention is as described above, the following effects can be obtained. <a> The process can be omitted, labor can be saved, and the construction period can be shortened. <B> High heat insulation performance is achieved by interposing a weakly heat-conductive member between the pillar and the outer wall material to block heat conduction, and by forming a continuous heat-insulating airtight layer on the back surface of the outer wall material by spray foaming. can get. <C> Since the foaming liquid is sprayed from the inside of the building, stable construction is possible throughout the year without being affected by the weather outside. <D> Since the heat insulation work is done by a carpenter and the work is done by a specialist, a uniform heat-insulating layer can be obtained regardless of the skill of the carpenter.

[Brief description of drawings]

1] Perspective view of a wooden house with a part omitted

[Figure 2] Side view

FIG. 3 is a sectional view taken along line III-III in FIG.

Claims (1)

[Claims] 1. A method for external heat insulation of a wooden house in which a heat insulating material is laminated on the back surface side of the outer wall material to form an air layer between the heat insulating material and the inner wall material, wherein a low thermal conductivity is provided between the column and the outer wall material. Immediately before the construction of the inner wall material, a spray foam insulation material is formed from the inside of the room to the back surface of the outer wall material, and the weak heat conductive member and the spray foam insulation material are connected to the back surface of the outer wall material. An external heat insulating method for a wooden house, which is characterized in that a heat insulating airtight layer is formed.