JP2020197011A - External heat insulation structure - Google Patents

Abstract

To provide a dry external heat insulation structure having higher heat insulation performance by suppressing thermal bridge of a window frame.SOLUTION: An external heat insulation structure 1 comprises a structural face material 12 arranged on the outdoor side of a skeleton 11 of a building, a heat insulation material 13 arranged on the outdoor side of the structural face material 12, and an exterior material 14 arranged on the outdoor side of the heat insulation material 13, in which a window frame 17 is provided in an opening 14a of the exterior material 14. The heat insulating material 13 covers at least a part of an aspect face on the outdoor side of the window frame 17.SELECTED DRAWING: Figure 2

Description

The present invention relates to an external heat insulating structure.

In the housing market these days, "energy saving" has become one trend, and the use of ZEH (Zero Energy House) and HEMS (Home Energy Management System) is expanding. In order to improve the energy-saving performance of a house, it is effective to make it difficult for heat inside the building to escape and reduce the energy used for heating and cooling.

Conventionally, a filling insulation method and an outer insulation method have been used as a method for insulating the outer wall of a building such as a steel frame structure or a wooden structure (see, for example, Patent Document 1). In the filling insulation method, a heat insulating material is placed between the skeletons of a building or on the indoor side, and a heat insulating material such as glass wool is often filled between the skeletons. In this filling insulation method, the cost of the heat insulating material can be reduced because the price of the heat insulating material is low, but there is a problem that the building frame becomes a thermal bridge and the heat insulating performance is not so high.

On the other hand, in the outer insulation method, a heat insulating material is arranged on the outdoor side of the structural skeleton, and a plastic-based heat insulating plate material such as foamed plastic is stretched on the outdoor side of the skeleton. In the external insulation method, the entire building is covered with heat insulating material, so there is no thermal bridge and the heat insulating performance is high. Therefore, in recent years, an external insulation method having higher heat insulation performance has also been used.

There are two types of external insulation methods: a dry method that finishes the outer wall surface using exterior materials such as panels and ceramic siding, and a wet external insulation method that installs wet exterior materials such as mortar and paint on the outdoor side of the heat insulating material. Exists. FIG. 1 shows a plan view of an example of a conventional dry type external heat insulating structure. The external heat insulating structure 100 shown in FIG. 1 includes a structural face material 112 arranged on the outdoor side of the building frame 111, a heat insulating material 113 arranged on the outdoor side of the structural face material 112, and the heat insulating material. It includes an exterior material 114 arranged on the outdoor side of the material 113.

A furring strip 115 made of wood or the like is arranged between the exterior material 114 and the heat insulating material 113, and a ventilation layer 116 is provided between the exterior material 114 and the heat insulating material 113. Further, a window frame 117, which is composed of an upper frame, a lower frame, and a vertical frame 118 and is made of aluminum or the like, is attached to the opening 114a of the exterior material 114. A frame 119 into which the glass plate 120 is fitted is attached to the window frame 117 as a shoji screen.

The gap between the exterior material 114 and the window frame 117 is filled with a sealing material 121 such as urethane, and a backup material 122 for preventing three-sided adhesion by the sealing material 121 is incorporated.

Japanese Unexamined Patent Publication No. 2003-166379

By the way, when examining the heat that escapes from the building by part, the heat that escapes from the window is often the largest. This is because the window frame 117 made of aluminum or the like serves as a thermal bridge. Therefore, in order to improve the heat insulating performance of the building, it is necessary to suppress the thermal bridge around the window frame 117 attached to the opening 114a of the exterior material 114.

Therefore, an object of the present invention is to propose a dry-type external heat insulating structure that suppresses a thermal bridge of a window frame and has higher heat insulating performance.

The present invention that solves the above problems is as follows.
[1] A structural surface material arranged on the outdoor side of the building frame, a heat insulating material arranged on the outdoor side of the structural surface material, and an exterior material arranged on the outdoor side of the heat insulating material are provided. , An external heat insulating structure in which a window frame is provided at the opening of the exterior material.
An external heat insulating structure, characterized in that the heat insulating material covers at least a part of a finding surface on the outdoor side of the window frame.

[2] The external heat insulating structure according to the above [1], wherein the outdoor surface of the structural surface material and the outdoor side finding surface of the window frame are arranged substantially flush with each other.

[3] The exterior material that is closest to the window frame and covers the prospective surface of the heat insulating material has a shape that can be fixed from the outdoor side to the skeleton or the furring strip arranged on the outdoor side of the heat insulating material. The external heat insulating structure according to the above [1] or [2].

[4] The external heat insulating structure according to any one of [1] to [3] above, wherein the exterior material is made of lightweight cellular concrete.

[5] The external heat insulating structure according to any one of [1] to [4], wherein a moisture permeable waterproof sheet is arranged between the structural face material and the heat insulating material.

[6] The external heat insulating structure according to any one of [1] to [5] above, wherein a moisture permeable waterproof sheet is arranged on a prospective surface of the heat insulating material.

[7] In any one of the above [1] to [6], a waterproof tape is attached so as to straddle the outdoor side finding surface of the window frame and the outdoor side surface of the structural surface material. Described external insulation structure.

[8] The outer covering according to any one of [1] to [7] above, wherein a waterproof tape is attached so as to straddle the finding surface on the outdoor side of the window frame and the prospective surface of the heat insulating material. Insulation structure.

According to the present invention, it is possible to realize a dry external heat insulating structure having higher heat insulating performance by suppressing a thermal bridge of a window frame.

It is a top view of an example of the conventional dry type external insulation structure. It is a top view of the preferable example of the external insulation structure by this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a plan view of a suitable example of the external insulation structure according to the present invention. The external heat insulating structure 1 shown in FIG. 2 includes a structural face material 12 arranged on the outdoor side of the building frame 11, a heat insulating material 13 arranged on the outdoor side of the structural face material 12, and the heat insulating material. An exterior material 14 arranged on the outdoor side of the material 13 is provided.

A furring strip 15 made of wood or the like is arranged between the exterior material 14 and the heat insulating material 13, and the exterior material 14 is attached to the skeleton 11 (pillar or stud) via the furring strip 15 by using a screw B. It is fixed, and a ventilation layer 16 is provided between the exterior material 14 and the heat insulating material 13. Further, a window frame 17 including an upper frame, a lower frame, and a vertical frame 18 is attached to the opening 14a of the exterior material 14. A frame 19 in which the glass plate 20 is fitted is attached to the window frame 17 as an inward-opening shoji.

Further, the sealing material 21 is filled in the gap between the exterior material 14 and the window frame 17 and between the two exterior materials 14, and the backup material 22 for preventing the three-sided adhesion by the sealing material 21 is installed inside. Has been done.

In the external heat insulating structure 1 according to the present invention, the heat insulating material 13 arranged on the outdoor side of the structural surface material 12 covers at least a part of the outdoor side finding surface 18a of the vertical frame 18 (window frame 17). It is important that they are arranged. As a result, the thermal bridge of the window frame 17 can be reduced and the heat insulating performance of the external heat insulating structure 1 can be improved.

As described above, the external heat insulating structure 1 according to the present invention is characterized in that the heat insulating material 13 is configured to cover at least a part of the finding surface 18a on the outdoor side of the window frame 17. The configuration of is not particularly limited and can be set appropriately. Hereinafter, each configuration will be described.

-Structural face material-
The structural facing material 12 includes wooden boards such as structural plywood, structural panels, particle board, and sheathing board, hard wood piece cement board, pulp cement board, flexible board, calcium silicate board, and volcanic vitreous multi-layer. A board, gypsum board, etc. can be used. The thickness of the structural face material 12 can be appropriately set according to the material, but is about 9 mm to 25 mm.

It is preferable that the outdoor surface 12a of the structural surface material 12 and the outdoor finding surface 18a of the vertical frame 18 (window frame 17) are arranged substantially flush with each other. That is, there may be a step between the outdoor surface 12a of the structural surface material 12 and the outdoor finding surface 18a of the vertical frame 18 (window frame 17), but in this case, the vicinity of the end surface of the heat insulating material 13. It is necessary to process the portion of the window frame 17 (vertical frame 18) on the heat insulating material side so as to cancel the step. In this regard, if the outdoor surface 12a of the structural surface material 12 and the outdoor finding surface 18a of the vertical frame 18 (window frame 17) are arranged substantially flush with each other, the above processing is performed. The heat insulating material 13 can be used as it is.

As will be described later, when the moisture permeable waterproof sheet 23 is arranged between the structural surface material 12 and the heat insulating material 13, or when the outdoor side finding surface 18a and the structural surface of the vertical frame 18 (window frame 17) are arranged. When the waterproof tape 24 is attached so as to straddle the outdoor surface 12a of the material 12 (see FIG. 2), the moisture-permeable waterproof sheet 23 and the waterproof tape 24 are extremely thin. Therefore, if the outdoor surface 12a of the structural surface material 12 and the outdoor side finding surface 18a of the vertical frame 18 (window frame 17) are arranged substantially flush with each other, the outdoor side of the structural surface material 12 The step between the surface 12a and the outdoor finding surface 18a of the vertical frame 18 (window frame 17) is small. Therefore, although it is not always necessary to perform the above-mentioned processing, the outdoor surface of the moisture-permeable waterproof sheet 23 and the outdoor finding surface 18a of the vertical frame 18 (window frame 17) are arranged substantially flush with each other. It is more preferable to have.

-Insulation material-
The heat insulating material 13 can be made of known materials such as phenolic resin foam (PF), beaded expanded polystyrene (EPS), extruded expanded polystyrene (XPS), and rock wool (RW). Above all, it is preferable to use phenol resin foam as the material of the heat insulating material 13 from the viewpoint of excellent heat insulating properties.

As the heat insulating material 13, for example, a heat insulating panel formed by foaming a resin in a factory or the like can be used. Alternatively, a material formed by spraying a heat insulating material at a construction site or the like can also be used. A heat insulating panel made of only foam or a heat insulating panel in which a face material is laminated and integrated on at least one surface of the foam may be used. As the face material when phenol resin foam or the like is used as the heat insulating material 13, known face materials such as non-woven fabric, woven fabric, paper, and metal foil can be used.

The thickness of the heat insulating material 13 is about 5 mm to 100 mm, and by setting the thickness of the heat insulating material 13 to 5 mm or more, sufficient heat insulating performance can be obtained. Further, by setting the thickness of the heat insulating material 13 to 100 mm or less, high heat insulating performance can be obtained without unnecessarily increasing the thickness of the exterior material 14.

-Exterior material-
The exterior material 14 can be made of lightweight cellular concrete (ALC), precast concrete (PCa), extruded cement board, or the like. Of these, ALC has a lower thermal conductivity, and therefore has a higher heat insulating effect than other exterior material materials. Therefore, it is preferable that the exterior material 14 is made of ALC so that the exterior material 14 can be used as an additional heat insulating material.

As the sealing material 21 that fills the gap between the exterior material 14 and the window frame 17 and the gap between the joints between the exterior materials 14, urethane-based, epoxy-based, or modified silicon-based ones can be used. Further, the backup material 22 can be made of a material that can be elastically deformed.

Further, as shown in FIG. 2, the exterior material 14b closest to the window frame 17 covers the prospective surface (end surface) 13a of the heat insulating material 13 and is arranged from the outdoor side to the outdoor side of the skeleton 11 or the heat insulating material 13. It is preferable to have a shape that can be fixed to the furring strip 15. That is, when arranging the exterior material 14 in the vicinity of the opening 14a, it is conceivable to dispose the exterior material 14 separately on the outdoor surface of the heat insulating material 13 and the prospective surface 13a. In this case, a pedestal for fixing the exterior material 14 is required between the exterior material 14 and the end face of the heat insulating material 13.

In this regard, the heat insulating material 13 is expected to cover the prospective surface 13a of the heat insulating material 13 and have a shape that can be fixed to the skeleton 11 or the furring strip 15 arranged on the outdoor side of the heat insulating material 13 from the outdoor side. There is no need for a fixing pedestal on the surface 13a side. As a result, the heat insulating material 13 can be arranged closer to the opening 14a, the thermal bridge of the window frame 17 can be further reduced, and the heat insulating performance of the external heat insulating structure 1 can be further improved.

As such an exterior material 14b, a material having a substantially L-shaped cross section or an arch-shaped material as shown in FIG. 2 can be used. As the arch-shaped exterior material 14b, one having at least one of the outer (outdoor) surface and the inner (indoor side) surface can be used. Above all, as the exterior material 14b, it is preferable to use a material having a substantially L-shaped cross section.

Further, as the exterior material 14b closest to the upper frame of the window frame 17, the prospective surface 13a of the heat insulating material 13 such as the one having a substantially L-shaped cross section shown in FIG. 2 is covered and only from the prospective direction. When a material having a fixable shape is used, it is preferable to provide a drain hole for draining water in order to prevent water that has entered from above from accumulating on the horizontal plane of the exterior material 14b.

-Moisture permeable waterproof sheet-
As shown in FIG. 2, it is preferable that the moisture permeable waterproof sheet 23 is arranged between the structural face material 12 and the heat insulating material 13. As the moisture permeable waterproof sheet 23, those specified in JIS-A-6111 can be used. As a result, when the seal by the sealing material 21 is broken and water infiltrates, it is possible to suppress the infiltration of water into the structural face material 12.

-Waterproof tape-
When the moisture-permeable waterproof sheet 23 is arranged between the structural surface material 12 and the heat insulating material 13 as described above, the outdoor side finding surface 18a of the vertical frame 18 (window frame 17) and the structural surface material 12 It is preferable that the waterproof tape 24 is attached so as to straddle the outdoor surface 12a of the above. As a result, when the seal by the sealing material 21 is broken and moisture infiltrates, it is possible to further suppress the infiltration of moisture into the indoor side.

As the waterproof tape 24, a synthetic resin tape such as a butyl tape or an acrylic tape can be used. It can be configured to have adhesiveness on at least one of its surfaces. The waterproof tape 24 can have adhesiveness on one side or both sides, but it is preferable that the waterproof tape 24 has adhesiveness on both sides.

The waterproof tape 24 is coated with an appropriate adhesive material such as butyl or rubber across the outdoor side finding surface 18a of the vertical frame 18 (window frame 17) and the outdoor side surface 12a of the structural surface material 12. Then, a dried product may be used.

Further, as shown in FIG. 2, it is preferable that the moisture permeable waterproof sheet 25 similar to the moisture permeable waterproof sheet 23 described above is arranged on the prospective surface (end surface) 13a of the heat insulating material 13. As a result, when the seal by the sealing material 21 is broken and moisture infiltrates, it is possible to prevent the moisture from penetrating into the heat insulating material 13 and deteriorating the heat insulating performance.

When the moisture-permeable waterproof sheet 25 is arranged on the prospective surface (end surface) 13a of the heat insulating material 13 as described above, the outdoor side finding surface 18a of the vertical frame 18 (window frame 17) and the prospective surface of the heat insulating material 13 ( It is preferable that the same waterproof tape 26 as the waterproof tape 24 described above is attached so as to straddle the end face) 13a. As a result, when the seal by the sealing material 21 is broken and moisture infiltrates, it is possible to further prevent the moisture from penetrating into the heat insulating material 13 and deteriorating the heat insulating performance.

The window structure provided in the opening 14a of the exterior material 14 configured as described above is not particularly limited, and includes a semi-externally-opened one and an internally-internally opened one as shown in FIG. Appropriate ones can be used. Above all, by using an internal window, it is possible to suppress the inflow and outflow of heat and further improve the heat insulating performance.

Further, in the external heat insulating structure 1 according to the present invention, as shown in FIG. 2, it is preferable to provide a drainer 27 near the lower frame of the window frame 17 attached to the opening 14a. As a result, the rain closing process can be performed satisfactorily. Further, the end portion of the drainer 27 is preferably located on the pillar side of the prospective surface of the exterior material 14b. As a result, the rain closing process can be performed better.

According to the present invention, it is possible to realize a dry external heat insulating structure having higher heat insulating performance by suppressing a thermal bridge of a window frame.

1,100 External insulation structure 11,111 Frame 12,112 Structural surface material 13,113 Insulation material 13a Expected surface 14,114 Exterior material 14a Opening 14b Exterior material 15,115 Furring edge 16,116 Ventilation layer 17,117 Window frame 18,118 Vertical frame 18a Finding surface 19,119 Frame 20,120 Glass plate 21,121 Sealing material 22,122 Backup material 23,25 Moisture permeable waterproof sheet 24,26 Waterproof tape 27 Drainer B screw

Claims (8)

The exterior is provided with a structural face material arranged on the outdoor side of the building frame, a heat insulating material arranged on the outdoor side of the structural face material, and an exterior material arranged on the outdoor side of the heat insulating material. It is an external insulation structure with a window frame provided at the opening of the material.
An external heat insulating structure, characterized in that the heat insulating material covers at least a part of a finding surface on the outdoor side of the window frame. The external heat insulating structure according to claim 1, wherein the outdoor surface of the structural surface material and the outdoor side finding surface of the window frame are arranged substantially flush with each other. 1. The exterior material that is closest to the window frame and covers the prospective surface of the heat insulating material has a shape that can be fixed from the outdoor side to the skeleton or the furring strip arranged on the outdoor side of the heat insulating material. Or the external insulation structure according to 2. The external heat insulating structure according to any one of claims 1 to 3, wherein the exterior material is made of lightweight cellular concrete. The external heat insulating structure according to any one of claims 1 to 4, wherein a moisture permeable waterproof sheet is arranged between the structural surface material and the heat insulating material. The external heat insulating structure according to any one of claims 1 to 5, wherein a moisture permeable waterproof sheet is arranged on a prospective surface of the heat insulating material. The external heat insulating structure according to any one of claims 1 to 6, wherein a waterproof tape is attached so as to straddle the finding surface on the outdoor side of the window frame and the outdoor surface of the structural surface material. .. The external heat insulating structure according to any one of claims 1 to 7, wherein a waterproof tape is attached so as to straddle the finding surface on the outdoor side of the window frame and the prospective surface of the heat insulating material.

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