Heat insulation layer formation method

Abstract

To improve the efficiency improvement of a gypsum board installation work and to prevent the construction failure of a heat insulation layer upon constructing a building having a prescribed fire protection structure or fire resistant structure.SOLUTION: To a planned installation location 70 as a contact part between a roof side heat insulation layer 10 and a wall side heat insulation layer 20 where a gypsum board 30 composing an inner wall is planned to be installed, the attachment and removal of a mold material 60 with an almost equal thickness as that of the gypsum board 30 are executed, and the planned installation location 70 is provided with an insertion part 80 for installing the gypsum board 30.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for forming a heat insulating layer on the wall side and roof side, which can be applied when constructing a building having a specified fireproof or fire-resistant structure. [Background technology]

[0002] 2. Description of the Related Art The method described in Patent Document 1 is known as a method for forming a heat insulating layer by spraying a heat insulating material made of urethane foamed in place (hereinafter, simply referred to as "heat insulating material") onto the walls and roof of a building.

[0003] For example, the structure described in the following non-patent document 1 is known as a structure with fire resistance equivalent to the semi-fireproof structure specified in the Building Standards Act (Ministry Ordinance Semi-fireproof structure) and as a housing specification that complies with the standards set by the Japan Housing Finance Agency. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4919449 [Non-patent literature]

[0005] [Non-Patent Document 1] "Outline of Specifications for Semi-Fireproof Structures (Detached Wooden Frame Construction)" April 2019, Japan Housing Finance Agency (https: / / www.flat35.com / files / 300187905.pdf) Summary of the Invention [Problem to be solved by the invention]

[0006] In order to adopt an insulation method using on-site foamed urethane as shown in Patent Document 1 while also creating a building with a quasi-fireproof structure as specified in the Ministerial Ordinance as shown in Non-Patent Document 1, for example, gypsum board must be installed on the indoor side of the wall-side insulation layer. In this case, if all the plasterboards are installed in advance, it will not be possible to spray insulation into the space behind the plasterboards. Therefore, in the past, as shown in Figure 5, it was necessary to install a part of the roof side of the gypsum board in advance (hereinafter referred to as "pre-installation"), and then perform the work of forming the wall side insulation layer and the roof side insulation layer, and then install the remaining gypsum board by adding it to the pre-installed gypsum board, in a two-step process.

[0007] The above-mentioned conventional two-step process has the following problems. (1) It is inefficient because gypsum board installers must visit the site to perform installation work before and after the formation of the insulation layer. (2) It is difficult to visually determine whether or not a sufficient amount of insulation has been sprayed into the back of the space between the pre-applied gypsum board and the exterior wall material, which can result in poor installation of the insulation layer.

[0008] Therefore, the present invention aims to provide a means for improving the efficiency of gypsum board installation work and preventing poor construction of the insulation layer caused by gypsum board when constructing a building having a specified fireproof or fire-resistant structure. [Means for solving the problem]

[0009] The present invention, which has been made to solve the above-mentioned problems, is a method of forming insulation layers on the wall and roof sides of a building, which is characterized by attaching and removing a form material of approximately the same thickness as the gypsum board to the intended installation location, which is the contact point between the wall-side insulation layer and the roof-side insulation layer and where the gypsum board that constitutes the inner wall is planned to be installed, and providing an insertion portion for the gypsum board at the intended installation location. In addition, in the present invention, the mounting of the formwork can be carried out before the contact points between the wall-side insulation layer and the roof-side insulation layer are bonded and connected. In addition, in the present invention, the attachment of the mold material can also be carried out after the formation of the wall-side insulation layer and before the formation of the roof-side insulation layer. Effect of the Invention

[0010] According to the present invention, at least one of the following effects can be obtained. (1) After the insulation layers on the wall and roof sides are formed, the gypsum board installation work can be carried out all at once. (2) Since there is no need to pre-attach a portion of the gypsum board prior to the formation of the insulation layer, poor construction of the insulation layer due to pre-attaching can be prevented. [Brief description of the drawings]

[0011] [Figure 1] Schematic diagram of the structure after carrying out the method according to the invention. [Diagram 2] An image showing the structure of the mold material. [Diagram 3] FIG. 1 is an image diagram showing step (1) of the method according to the present invention. [Figure 4] FIG. 2 is an image diagram showing step (2) of the method according to the present invention. [Diagram 5] An image showing the pre-installed state of gypsum board. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. EXAMPLES

[0013] <1> Overall configuration (Fig. 1) FIG. 1 is a schematic diagram showing a building in a state where gypsum boards are attached as members constituting the inner wall on the flat side near the roof of the building after the method according to the present invention is carried out. The building shown in Figure 1 is intended to be a house with a structure that has fire resistance equivalent to the semi-fireproof structure specified in the Building Standards Act (Ministry Ordinance semi-fireproof structure). The details of each part will be explained below.

[0014] <2> Wall-side insulation layer (Fig. 1) The wall-side insulation layer 10 is an insulation layer provided on the wall side of a building. In this embodiment, the wall-side insulating layer 10 is formed by spraying on-site foamed urethane between the columns or studs that make up the wall-side framework. Further, from the wall-side insulation layer 10 to the outdoor side, a moisture-permeable waterproof sheet 41, vertical furring strips 42, and exterior wall material 43 are installed in this order.

[0015] <3> Roof side insulation layer (Figure 1) The roof-side insulation layer 20 is an insulation layer provided on the roof side of a building. In this embodiment, an air layer is provided between the rafters 51 that make up the roof framework, and on-site foamed urethane is sprayed onto the indoor side of this air layer to form the roof-side insulation layer 20. This air layer ensures an air layer between the sheathing board 54 and the roof-side insulation layer 20. The components subsequent to the sheathing board 53 installed on the outdoor side of the rafters 51 will vary depending on the type of roofing.

[0016] <4> Gypsum board (Figure 1) The gypsum board 30 is a member that constitutes part of the interior wall on the indoor side of a building. The gypsum board 30 is a member having excellent fire resistance, and is a member that is frequently used in construction having a quasi-fireproof structure in accordance with the ministerial ordinance. In the present invention, the type of the gypsum board 30 is not particularly limited. For example, in accordance with the specifications of the Ministerial Ordinance for Semi-Fireproof Construction, the thickness of the gypsum board 30 to be installed on the wall side is generally 12.5 mm, or two layers of 9.5 mm.

[0017] <5> Mold material (Fig. 2) The mold material 60 is a member for securing a space (insertion portion 80) for inserting the gypsum board 30 therein. In the present invention, the thickness, shape, material, structure, etc. of the mold material 60 are not particularly limited, but an example of the mold material will be described below.

[0018] (1) Thickness of the mold material It is preferable that the thickness (T) of the mold material 60 is approximately equal to or equal to the thickness of the gypsum board 30 . If the thickness of the molding material 60 is made too thick compared to the thickness of the gypsum board 30, gaps are likely to occur between the gypsum board 30 and the wall-side insulation layer 10, which is undesirable as it can be a factor in reducing the insulation performance. Furthermore, if the thickness of the mold 60 is made too thin compared to the thickness of the gypsum board 30, it becomes difficult to insert the gypsum board 30 into the insertion portion 80, and when the gypsum board 30 is inserted, the surrounding insulating layer may be drawn in and deformed, which is undesirable.

[0019] (2) Shape of the mold The shape of the mold material 60 may be appropriately determined depending on the application. In addition, since the upper part of the mold material 60 will have the same shape as the upper part of the gypsum board 30 to be installed later, the shape of the mold material 60 to be used can be grasped in advance from design drawings or the like. For example, if the building has a gable roof, the upper part of the profile 60 used on the gable side will have a sloped surface that matches the slope (θ) of the roof, like the profile 60 shown in Figure 2(a), and the width (B) can be configured to be, for example, the angular separation width between the pillars or partition walls. Moreover, the upper part of the mold member 60 used on the flat side has a horizontal surface parallel to the longitudinal direction of the eaves beam 52, like the mold member 60 shown in FIG. 2(b).

[0020] For example, by using the profile 60 in FIG. 2(a) upside down or by rotating it 90 degrees with the height H being equal to the angular separation width B of the column or between columns, it is possible to use one profile 60 for both the gable side and the flat side.

[0021] In addition, as shown in the mold 60 in FIG. 2(b), by configuring a rod 61 or the like to be freely attached and detached to the mold 60, a worker can grasp the rod 61 and use it to push the mold 60 upward, which enables efficient work in high places.

[0022] (3) Material of the mold The material of the mold member 60 is not particularly limited in the present invention, but it is preferable to use a material that has good releasability from the urethane foamed in situ, such as a plastic with a smooth surface. Furthermore, even if the material of the mold 60 itself does not have good releasability, the surface of the mold 60 may be treated with a coating material or a sheet material that has good releasability.

[0023] <6> Installation procedure (Fig. 3) Next, the procedure of the method according to the present invention will be described with reference to FIGS.

[0024] <6.1> Procedure example 1 (Figure 3) In this example, after the wall-side insulation layer 10 and the roof-side insulation layer 20 are installed, and before the contact points between the roof-side insulation layer 20 and the wall-side insulation layer 10 are bonded and connected, a molding material 60 is inserted into the intended installation location 70 of the gypsum board 30, and the molding material 60 is removed at an appropriate time to form an insertion portion 80.

[0025] <6.2> Procedure Example 2 (Figure 4) In this example, after the wall-side insulation layer 10 is formed but before the roof-side insulation layer 20 is formed, a molding material 60 is attached to the intended installation location 70 of the gypsum board 30, and after the roof-side insulation layer 20 is formed, the molding material 60 is removed at an appropriate time to form the insertion portion 80.

[0026] <7> summary As described above, the method of the present invention can improve the efficiency of gypsum board installation work when constructing a building with a specified fireproof or fire-resistant structure, and can also prevent poor installation of the insulation layer caused by the gypsum board. EXAMPLES

[0027] In addition, the method according to the present invention can also be applied to a structure in which a load-bearing wall made of diagonal braces or paneling is added to the structure shown in Example 1 (Figure 1), a structure in which horizontal furring strips or ventilation fittings are provided instead of vertical furring strips, a structure in which the ventilation layer is omitted, and the like. Furthermore, the method according to the present invention is applicable not only to buildings intended to be provided with the ministerial ordinance quasi-fireproof structure shown in Example 1 (FIG. 1), but also to buildings intended to be provided with fireproof structure, quasi-fireproof structure, or fireproof structure as defined by the Building Standards Act. [Explanation of symbols]

[0028] 10: Wall-side insulation layer 20: Roof side insulation layer 30: Gypsum board 41: Breathable waterproof sheet 42: Vertical furring strip 43: Exterior wall material 51: Rafter 52: Eave girder 53: Field board 60: Shape material 61: Bar material 70: Planned installation location 80: Insertion part

Claims

1. A method for forming a thermal insulation layer on the wall side and roof side of a building, comprising the steps of: The insulation layer on the wall side and the insulation layer on the roof side are connected to each other at a planned location where the gypsum board constituting the inner wall is to be installed, and a mold material having a thickness approximately equal to that of the gypsum board is attached and removed to provide an insertion portion for the gypsum board at the planned installation location. A method for forming an insulating layer.

2. The installation of the mold material is performed before the contact points between the wall-side insulation layer and the roof-side insulation layer are bonded and connected. A method for forming a heat insulating layer according to claim 1.

3. The installation of the mold material is performed after the formation of the wall-side insulation layer and before the formation of the roof-side insulation layer. A method for forming a heat insulating layer according to claim 1.

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