JPS62148743A - External heat insulating construction method for house - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an insulation method for a house, and more specifically, the present invention relates to an insulation method for a house, and more specifically, to an insulation method that has excellent heat insulation properties and does not cause condensation on the outer wall surface that partitions the indoor and outdoor areas. This article relates to insulation construction methods that provide insulation.

Technical Background and Problems Particularly in the winter, in order to provide comfort to the living space and save on heating costs, insulation methods are widely used in which insulation material is installed on the exterior wall that separates the indoor and outdoor areas of a house. ing.

Conventionally known insulation methods for such houses include installing foamed plastics such as foamed urethane, foamed polystyrene, and phenol foam on the outside of the wall that separates the indoors and outdoors; The problem was that it was relatively expensive.

In order to solve these problems, an insulation method has been proposed in which glass wool and foamed plastic are installed in this order on the outdoor side of the wall that separates the indoors and outdoors and is installed between pillars and studs. There is.

However, the above-mentioned insulation method using a laminate of glass wool and foamed plastic as a heat insulation layer has the following problems. In other words, if a wall with a heat insulating layer made of glass wool and foamed plastic is installed between the indoor side, which is hot and humid, and the outdoor side, which is cold and humid,
Even if a moisture-proof layer is installed on the indoor side of the wall, moisture can enter from outlet holes on the wall, and after passing through the glass wool layer, which has a high moisture permeability, it reaches the foamed plastic layer. Since the layer has a low moisture permeability, it is difficult for moisture to pass through the foamed plastic layer, resulting in dew condensation on the surface of the foamed plastic layer. If condensation forms on the surface of foamed plastics, the glass wool layer absorbs this condensation, reducing its insulation performance or making the glass wool layer too heavy to hold its shape. However, there was a serious problem in that the water rings were damaged.

The inventors of the present invention made extensive studies to solve these problems, and found that by using a specific foamed plastic, through-holes of a specific size were formed in the foamed plastic, and the foamed plastic was roughly sized. A seam 1 that prevents air from entering and exiting the outdoor surface of the bath but allows water vapor to pass through.
The present inventors have discovered that by providing a groove, dew condensation on the surface of foamed plastics can be prevented without greatly reducing the insulation performance, and the present invention has been completed.

Purpose of the Invention The present invention is intended to solve the problems associated with the prior art as described above, and it is necessary to use fiber-based insulation materials such as glass wool and foamed plastics such as expanded polystyrene, urethane foam, and phenol foam. In a residential insulation method that uses foamed plastics in combination with foamed plastic as an insulating material, by preventing condensation from forming on the surface of foamed plastics, fiber-based insulation materials such as glass wool are prevented from absorbing water, and the insulation performance is improved. The purpose of the present invention is to provide an insulation method for a house that can prevent the water from decreasing and also prevent the water ring from becoming obstructed.

Summary of the Invention The exterior insulation method for a house according to the present invention is an exterior insulation method in which a fiber-based insulation material and a foamed plastic insulation material are installed in this order from the interior wall surface toward the outdoors on the outside of the exterior wall surface that partitions the indoors and outdoors. In the insulation method, as a foamed plastic insulation material, the density is 20 kg/m3 or more and the pore diameter is 2 mm.
It is characterized by using a sheet with a plurality of through holes as shown below, and providing a sheet on the outdoor surface of this foamed plastic insulation material that can prevent air from flowing in and out while also allowing water vapor to pass through. .

In the exterior insulation method for a house using a fiber-based insulation material and a foamed plastic insulation material according to the present invention, a foamed plastic insulation material having through-holes of a specific size is used, and the foamed plastic insulation material is Since a moisture permeable sheet is provided on the outdoor surface of the plastic heat insulating material but blocks the inflow of air, dew condensation on the surface of the foamed plastic can be prevented without significantly reducing the heat insulating performance. Therefore, it is possible to prevent the fiber-based heat insulating material such as glass wool from absorbing water, and the excellent effect of not hiding water rings can be obtained.

DETAILED DESCRIPTION OF THE INVENTION The method for insulating a house according to the present invention will be specifically described below.

The insulation method for a house according to the present invention is an external insulation method in which fiber-based insulation material and foamed plastic insulation material are installed in this order from the wall surface toward the outdoors on the outdoor side of the outer wall surface that partitions the indoors and outdoors. Regarding improvements, I will first explain the outline of this external insulation method.

As shown in Figure 1, the external insulation method for houses is to install fiber-based insulation material 4 and foamed plastic on the outdoor side of a wall surface 3 that is installed between partitions, pillars, studs 2, etc. that separate indoors and outdoors. The basic requirement is to provide the insulation material 5 in this order, but generally the interior material 7 is provided on the inner side of the wall surface 3 with a moisture-proof layer 6 in between, and the interior material 7 is provided on the outside of the foamed plastic insulation material 5. An exterior material 9 such as siding material is provided through a crosspiece 8 or the like.

This external insulation method for houses can also be applied to solid walls where the columns are exposed when viewed from inside the university.

As the above-mentioned fiber-based heat insulating material 4, glass wool, rock wool, insilsion board, etc. can be used, and as the foamed plastic heat insulating material 5, foamed polystyrene, urethane foam, phenol foam, etc. can be used. . Further, as the moisture-proof layer 6, a polyethylene film or the like having a thickness of about 0.1 to 0.2 nm can be used.

By providing a crosspiece 8 or the like between the foamed plastic insulation material 5 and the exterior material 9, the foamed plastic insulation material 5
A ventilation layer 10 is formed between the foamed plastic heat insulating material 5 and the exterior material 9, so that water vapor that has permeated through the foamed plastic heat insulating material 5 is discharged to the outside.

In the present invention, in the above-mentioned house exterior insulation construction method, the foamed plastic insulation material 5 has a density of 20K.
C]/m3 or more, and with a plurality of through holes 11 having a hole diameter of 2 mm or less, preferably 1.5 mm D or less, and more preferably 1, Q mm or less,
Furthermore, the foamed plastic heat insulating material is characterized by being provided with a sheet 12 on the outdoor surface thereof, which can prevent air from flowing in and out and which can transmit water vapor.

The diameter d of the through hole 11 provided in the foamed plastic heat insulating material 5 is 2 mm or less, preferably -1.5 mm or less, and more preferably 1.0 mm or less. If the pore diameter d exceeds 2 mm, air convection is likely to occur within the pores, resulting in a decrease in heat insulation performance, which is not preferable.

The distance separating adjacent holes 11a and 11b is 2 to 15
mm, preferably about 3 to 1Q mm. If this distance is less than 2 mm, it is not preferable because the mechanical strength of the foamed plastic heat insulating material becomes too small or the heat insulating performance deteriorates. Furthermore, if the distance exceeds 15 mm, the water vapor transmission rate becomes too low, making it difficult to prevent dew condensation on the contact surface of the foamed plastic heat insulating material with the fiber-based heat insulating material, which is not preferable.

FIG. 4 shows a modified example of the hole. The hole 11 shown in this figure has a tapered tip, and in this case, the maximum hole diameter d at the entrance is preferably 2 mm or less, and the distance separating the adjacent holes 11a and 11b. The shortest distance is adopted, and it is desirable that this shortest path @D is 2 to 15 mm, preferably 3 to 7 mm.

The sheet 12 provided on the outdoor surface of the foamed plastic heat insulating material 5 has the property of being able to prevent air from flowing in and out and allowing water vapor to pass through. Therefore, much of the warm air indoors escapes outdoors, and moisture that has passed through the foamed plastic heat insulating material 5 can pass through this sheet 12 and reach the ventilation layer 10. As such a sheet 12, Tyvek (trade name) sold by DuPont, USA is used. This Tyvek is a sheet-like material made of finely spread ultra-III'7iIA fibers such as acrylic fibers. In addition, Boretex sheets sold by Boa Corporation in the United States are also available with sheet 1
It can be used as 2.

Effects of the Invention In the exterior insulation construction method for a house using a fiber-based insulation material and a foamed plastic insulation material according to the present invention, a foamed plastic insulation material provided with through-holes of a specific size is used, and A sheet that has moisture permeability but blocks the inflow of air is provided on the outdoor surface of this foamed plastic insulation material, so that the contact surface of the foamed plastic with the fiber-based insulation material does not significantly reduce the insulation performance. can prevent dew condensation. Therefore, it is possible to prevent the fiber-based heat insulating material such as glass wool from absorbing water, and the excellent effect of not hiding the water ring can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the exterior insulation method for a house, and FIG. 2 is an explanatory diagram of the exterior insulation construction method for a housing according to the present invention.
3 and 4 are cross-sectional views of the foamed plastic insulation material used in the present invention. 1... Column, 2... Stud, 3... Wall surface, 4... Fiber-based insulation material, 5... Foamed plastic insulation material, 6... Moisture barrier layer,
7... Interior material, 8... Crosspiece, 9... Exterior material, 10
... Ventilation layer, 11... Hole, 12... Sheet. Agent Patent Attorney Shunbetsu Meiki Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) In the exterior insulation method for houses, where fiber-based insulation material and foamed plastic insulation material are installed in this order on the outside of the exterior wall that partitions the indoors and outdoors, from the wall toward the outdoors, as the foamed plastics insulation material, Density is 20kg/m^3
By using a material with multiple through-holes with a diameter of 2 mm or less, it is possible to prevent air from entering and exiting the outdoor surface of the foamed plastic insulation material, and to allow water vapor to pass through. A method of insulating the exterior of a house, which is characterized by the installation of a sheet. (2) The method according to claim 1, wherein the fiber-based insulation material is glass wool or rock wool, and the foamed plastic insulation material is expanded polystyrene, urethane foam, or phenol foam.