JP2014218814A - Heat insulation structure and heat insulation method for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation structure and a heat insulation method for a building, capable of suppressing or preventing internal dew condensation on an existing external wall even if an external wall is newly mounted on the outdoor side of the existing external wall.SOLUTION: Vent holes 82 are provided in a cladding 56 in an existing external wall 12, and a plurality of ventilation furring strips 84 are arranged along a height direction of a building 10 on the outdoor side of the cladding 56. A heat insulation material 74 is arranged between the adjacent ventilation furring strips 84, and a cladding 88 in a new external wall 14 is mounted on the ventilation furring strips 84. A vent layer 76 in the external wall 12 and a vent layer 90 in the external wall 14 can be communicated with each other, and air in the vent layer 76 in the external wall 12 can be guided to the vent layer 90 in the external wall 14 through the vent holes 82 provided in the cladding 56, thus allowing moisture in the external wall 12 to escape to an outdoor 52 side via the vent layer 90.

Description

  The present invention relates to a heat insulating structure of a building and a heat insulating method.

  In invention of patent document 1, while providing exterior material (new exterior material) in the outer side of exterior material (existing exterior material) in the exterior wall of the existing building, while repairing work of an exterior wall is made easy, existing exterior material A technique is disclosed in which a heat insulating performance is ensured for a new exterior material by providing a heat insulation material between the exterior and the new exterior material.

JP 2011-52414 A

  However, if a new outer wall is provided on the outdoor side of the existing outer wall, moisture may escape inside the existing outer wall without allowing it to escape outside.

  The present invention has been made in consideration of the above facts, and even if a new outer wall is attached to the outdoor side of the existing outer wall, the heat insulating structure of the building that can suppress or prevent internal condensation on the existing outer wall And it aims at obtaining the heat insulation method.

  In order to achieve the above-mentioned object, a heat insulating structure for a building according to the invention described in claim 1 includes a vent opening penetrating an existing exterior material in an existing outer wall, and a new one provided on the outdoor side of the existing outer wall. An outer wall, a heat insulating material provided in the new outer wall, disposed on the outdoor side of the existing exterior material, and a new ventilation layer that constitutes a part of the new outer wall and communicates with the vent hole And a new exterior material disposed in a state of being provided between the materials.

  In the building heat insulating structure according to the first aspect of the present invention, the existing exterior material on the existing outer wall is provided with a vent hole that penetrates the existing exterior material. In addition, a new outer wall is provided on the outdoor side of the existing outer wall. In this new outer wall, heat insulating material is arranged on the outdoor side of the existing exterior material, and the new exterior material that constitutes a part of the new outer wall is a new ventilation that communicates with the ventilation hole between it and the heat insulating material. It is arranged in a state where a layer is provided.

  In this way, by providing a vent in the existing exterior material on the existing outer wall and communicating the vent layer (existing vent layer) on the existing outer wall and the new vent layer on the new outer wall, Moisture inside the existing outer wall can be released to the outdoors.

  The heat insulation structure for a building according to a second aspect of the present invention is the heat insulation structure for a building according to the first aspect of the present invention, wherein an airflow stop is provided in the existing ventilation layer in the existing outer wall.

  In the heat insulation structure of a building according to the invention according to claim 2, by providing an air flow stop in the existing ventilation layer in the existing outer wall, the flow of air along the height direction of the existing outer wall in the existing ventilation layer Can be prevented or suppressed. And the air in the existing ventilation layer in the existing outer wall can be guided into the new ventilation layer in the new outer wall through the vent provided in the existing exterior material in the existing outer wall.

  A heat insulating structure for a building according to a third aspect of the present invention is the heat insulating structure for a building according to the first or second aspect, wherein a moisture permeable waterproof sheet is laid on the surface of the heat insulating material.

  In the heat insulation structure of a building according to the invention described in claim 3, a moisture permeable waterproof sheet is laid on the surface of the heat insulating material. The moisture-permeable waterproof sheet has a property of allowing moisture to pass but not allowing water to pass. For this reason, moisture in the existing outer wall can be passed to the new outer wall side, while moisture passing through the new ventilation layer in the new outer wall can be prevented from passing to the existing outer wall side. Internal condensation can be suppressed or prevented.

  The heat insulation structure for a building according to the invention of claim 4 is the heat insulation structure for a building according to any one of claims 1 to 3, wherein braces are disposed on the outdoor side of the existing exterior material. Yes.

  In the heat insulation structure for a building according to the invention described in claim 4, the brace is disposed on the outdoor side of the existing exterior material, whereby the seismic strength of the building can be improved with the repair of the outer wall.

  The heat insulation method of the building which concerns on the invention of Claim 5 makes the said 1st process penetrate the said exterior port in the existing exterior material in any one of Claims 1-4, The said, A second step of disposing an airflow stop on the existing ventilation layer in the existing outer wall; a third step of disposing a ventilation trunk edge on the outdoor side of the existing exterior material; and a heat insulating material on the outdoor side of the existing exterior material. And a fifth step of attaching a new exterior material on the new outer wall to the ventilator rim, according to any one of claims 1 to 4.

  In the heat insulation method for a building according to the invention described in claim 5, in the first step, the existing exterior material in the existing outer wall is made to penetrate the vent hole, and in the second step, the air flow is blocked in the vent layer in the existing outer wall. Arrange. This prevents or suppresses the air flow along the height direction of the existing outer wall in the existing outer wall, and the existing ventilation in the existing outer wall through the vent provided in the existing exterior material in the existing outer wall. The air in the layer can be guided into a new ventilation layer in the new outer wall.

  Further, in the third step, the ventilation trunk edge is disposed on the outdoor side of the existing exterior material on the existing outer wall, and in the fourth step, the heat insulating material is disposed on the outdoor side of the existing exterior material. Further, in the fifth step, a new exterior material on a new outer wall is attached to the ventilator edge. In this way, by arranging the ventilation shell edge on the existing exterior material on the existing outer wall and attaching the new exterior material on the new outer wall to the existing exterior material via the ventilation trunk edge, A ventilation layer can be provided.

  A heat insulating method for a building according to a sixth aspect of the invention is a heat insulating method for a building according to the fifth aspect of the invention, comprising a laying step of laying a moisture permeable waterproof sheet on the surface of the heat insulating material. .

  In the heat insulation method for a building according to the invention described in claim 6, in order to lay the moisture permeable waterproof sheet on the surface of the heat insulating material, the moisture in the existing outer wall is passed to the new outer wall side, while the new ventilation in the new outer wall. Since moisture passing through the layer does not pass to the existing outer wall side, internal dew condensation can be suppressed or prevented in the existing outer wall.

  The building heat insulation method according to claim 7 is the building heat insulation method according to claim 5 or 6, wherein a brace is disposed on the outdoor side of the existing exterior material, and the brace One end of the brace is fixed to the ceiling beam, and the other end of the brace is fixed to the floor beam.

  In the building heat insulation method according to the seventh aspect of the present invention, the seismic strength of the building can be improved along with the repair of the outer wall by disposing the brace on the outdoor side of the existing exterior material.

  As described above, the heat insulating structure for a building according to the first aspect of the present invention can suppress or prevent internal condensation on the existing outer wall even if a new outer wall is attached to the outdoor side of the existing outer wall. It has the excellent effect of being able to.

  The heat insulation structure for a building according to the present invention according to claim 2 has an excellent effect that internal dew condensation can be suppressed or prevented in the existing outer wall.

  The heat insulation structure for a building according to the present invention according to claim 3 has an excellent effect that moisture can be prevented from entering the existing outer wall through the vent.

  The heat insulation structure of a building according to the present invention according to claim 4 has an excellent effect that the seismic strength of the building can be improved in accordance with the repair of the outer wall.

  In the heat insulation method for a building according to the present invention as set forth in claim 5, by providing a new outer wall on the outdoor side of the existing outer wall, it is possible to save the labor of peeling off the existing outer wall and to greatly reduce the work man-hours associated with the renovation of the outer wall. It has an excellent effect of being able to.

  The heat insulation method for buildings according to the present invention described in claim 6 has an excellent effect that moisture can be prevented from entering the existing outer wall through the vent.

  The heat insulation method for a building according to the present invention as set forth in claim 7 has an excellent effect that the seismic strength can be improved when the outer wall of the building is repaired.

In the heat insulation structure of the building which concerns on this Embodiment, it is a longitudinal cross-sectional view which shows the existing outer wall before repair. FIG. 2 is a horizontal sectional view showing an existing outer wall in the heat insulating structure of the building in FIG. 1. In the heat insulation structure of the building which concerns on this Embodiment, it is a longitudinal cross-sectional view which shows the new outer wall after repair. FIG. 4 is a horizontal sectional view showing an existing outer wall and a new outer wall in the heat insulating structure of the building in FIG. 3. It is a disassembled perspective view which shows the state which attaches a new outer wall to the existing outer wall in the heat insulation structure of the building which concerns on this Embodiment. (A) which shows an example of the modification of the heat insulation structure of the building which respectively concerns on this Embodiment is a top view, (B) is a front view, (C) is a side view. It is a front view which shows the ventilation trunk edge which comprises a part of heat insulation structure of the building which concerns on this Embodiment corresponding to FIG. 6 (B).

Hereinafter, the heat insulation structure of the building concerning one embodiment of the present invention is explained with reference to drawings.
<Configuration of heat insulation structure of building>

  FIG. 1 is a longitudinal sectional view showing an existing outer wall 12 before renovation in a building 10, and FIG. 2 is a horizontal sectional view of FIG. 3 is a longitudinal sectional view showing a new outer wall 14 after renovation in the building 10, and FIG. 4 is a horizontal sectional view of FIG.

(State before renovation)
As shown in FIG. 1, a fabric foundation 16 that supports the building 10 is provided at the lower part of the building 10. A substantially rectangular floor frame 18 is not shown above the fabric foundation 16, for example. It is fixed via an anchor bolt. The floor frame 18 includes grooved steel floor beams 20, and a plurality of steel floor beams 22 are provided at predetermined intervals between the floor beams 20 arranged opposite to each other.

  Between the lower flange portion 20 </ b> A of the floor girder 20 and the upper end surface 16 </ b> A of the fabric foundation 16, a gap 26 is provided for communicating the underfloor space 24 and the outside air. A floor joist 28 is provided on the upper flange portion 20B of the large floor beam 20 and the small floor beam 22 so as to oppose them. A floor base material 32 formed of particle board or the like is provided on the floor joist 28, and a floor finishing material 34 such as flooring is laid on the floor base material 32.

  Further, on the floor base material 32, an interior material 36 constituting a part of the outer wall 12 is erected along the height direction of the building 10. A baseboard 38 is provided at the lower end portion of the interior material 36, and the floorboard 34 and the interior material 36 are parted by the baseboard 38.

  A substantially rectangular ceiling frame 40 is fixed above the floor frame 18 via a pillar (not shown) between the floor frame 18. The ceiling frame 40 includes grooved steel ceiling beams 42, and a plurality of steel ceiling beams 43 are provided at predetermined intervals between the ceiling beams 42 arranged to face each other.

  A field edge 44 is fixed to the lower surface of the ceiling beam 42. A ceiling base material 46 made of gypsum board or the like is fixed to the lower surface of the field edge 44, and a ceiling finishing material 48 such as a cloth is attached to the lower surface of the ceiling base material 46. Further, a surrounding edge 50 is provided at the upper end portion of the interior material 36, and the ceiling edge material 48 and the interior material 36 are parted by the surrounding edge 50.

  As shown in FIG. 2 and FIG. 5, a plurality of square steel pipes 54 are erected along the height direction of the building 10 on the outdoor 52 side of the interior material 36. Frames 58 and 59 for attaching an exterior material 56 as an existing exterior material constituting a part of the outer wall 12 are respectively attached to the square steel pipes 54A and 54B arranged adjacent to each other.

  The frame 58 includes a frame 58A having a crank shape and a frame 58B having an L shape and integrated with the frame 58A. The side wall 54A1 of the square steel pipe 54A is fixed to the frame 58A, and one end portion of the exterior material 56A in the width direction (horizontal direction) is fixed to the frame 58B.

  The frame 59 includes a frame 59A having a crank shape and a frame 59B having an L shape and integrated with the frame 59A. The side wall 54B1 of the square steel pipe 54B is fixed to the frame 59A, and one end portion in the width direction (horizontal direction) of the exterior member 56B is fixed to the frame 59B.

  That is, the exterior material 56A is fixed to the square steel pipe 54A via the frame 58, and the exterior material 56B is fixed to the square steel pipe 54B via the frame 59. For example, ceramic siding is used for the outer wall materials 56A and 56B, and the vertical joint 57 between the exterior material 56A and the exterior material 56B is filled with a sealing agent (not shown).

  In addition, on the back surface of the interior material 36 in the outer wall 12, the prismatic wooden bricks 62 and 63 are adjacent to each other in a state where a gap is provided between the rectangular steel tube 54 </ b> A and 54 </ b> B outside the rectangular steel tubes 54 </ b> A and 54 </ b> B. It is arranged substantially parallel to the steel pipe 54A. In addition, the prismatic wooden bricks 64 and 65 are disposed substantially parallel to the square steel pipe 54B in a state where the square steel pipes 64B and 65 are adjacent to each other in a state where a gap is provided between the square steel pipe 54B. A prismatic outer wall base material 66 is disposed on the outdoor 52 side of the wooden bricks 62 and 63, and a prismatic outer wall base material 68 is disposed on the outdoor 52 side of the wooden bricks 64 and 65. Yes.

  A grooved frame 60 is disposed on the outdoor 52 side of the outer wall base material 66. With the outer wall base material 66 in between, the wooden brick 62 constitutes a grooved frame portion 60A and an inner flange portion 60A1 located on the indoor 70 side is fixed, and the wooden brick 63 constitutes a grooved frame portion 60B. An inner flange portion 60B1 located on the indoor 70 side is fixed. The web 60A2 of the groove-type frame portion 60A and the web 60B2 of the groove-type frame portion 60B are in surface contact.

  In the grooved frame portion 60A, one end portion in the width direction of the exterior member 56C is fixed to the outer flange portion 60A3 that faces the inner flange portion 60A1 and is located on the outdoor 52 side. Further, in the groove-type frame portion 60B, the other end portion in the width direction of the exterior member 56A is fixed to the outer flange portion 60B3 that faces the inner flange portion 60B1 and is located on the outdoor 52 side.

  On the other hand, a grooved frame 61 is disposed on the outdoor 52 side of the outer wall base material 68. With the outer wall base material 68 in between, the wooden brick 64 has a grooved frame portion 61A and an inner flange portion 61A1 located on the indoor 70 side is fixed, and the wooden brick 65 has a grooved frame portion 61B. An inner flange portion 61B1 located on the indoor 70 side is fixed. The web 61A2 of the grooved frame portion 61A and the web 61B2 of the grooved frame portion 61B are in surface contact.

  In the grooved frame portion 61A, the other end portion in the width direction of the exterior member 56B is fixed to the outer flange portion 61A3 that faces the inner flange portion 61A1 and is located on the outdoor 52 side. In the grooved frame portion 61B, one end portion in the width direction of the exterior member 56D is fixed to the outer flange portion 61B3 that faces the inner flange portion 61B1 and is located on the outdoor 52 side. Although not shown, the groove type frame extends in the horizontal direction substantially orthogonal to the groove type frames 60 and 61.

  Further, a heat insulating material 74 is disposed between the groove-type frame 60 and the square steel pipe 54A, between the square steel pipe 54A and the square steel pipe 54B, and between the square steel pipe 54B and the groove-type frame 61, respectively. As the heat insulating material 74, for example, a fiber heat insulating material such as glass wool or rock wool is used, and the heat insulating material 74 is accommodated in the bag body 75.

  As shown in FIG. 1, a ventilation layer 76 as an existing ventilation layer is formed between the heat insulating material 74 and the exterior material 56. The ventilation layer 76 communicates with the outside air, so that air (indicated by an arrow) can flow through the ventilation layer 76.

  In addition, in the assembly between each member, the member to be used will not be specifically limited if reliable assembly is possible. That is, it can select according to the material of each member, the shape of an assembly part, etc. Specifically, nails, screws, scissors, rivets, building material staplers, clips, adhesives, and the like can be used as appropriate. The same applies to the following description.

(State after renovation)
As shown in FIG. 3, the exterior material 56 in the existing outer wall 12 is provided with a plurality of vent holes 82 penetrating in the thickness direction of the exterior material 56 within a range that does not affect the strength of the exterior material 56. Yes. Further, airflow stoppers 78 and 80 are disposed on the upper and lower portions of the ventilation layer 76 in the existing outer wall 12, respectively.

  As shown in FIG. 4, on the outdoor 52 side of the exterior material 56, the ventilation trunk edge 84 is located at the height of the building 10 so as to face the grooved frames 60 and 61 with the exterior material 56 interposed therebetween. They are arranged along the vertical direction. A heat insulating material 74 is disposed between the adjacent ventilation trunk edges 84. A moisture permeable waterproof sheet 86 is laid on the surface of the heat insulating material 74. The moisture permeable waterproof sheet 86 is a waterproof sheet having a property of allowing moisture to pass but not allowing water to pass.

  In addition, an exterior material 88 as a new exterior material in the new outer wall 14 is attached to the ventilator rim 84 on the outdoor 52 side. As shown in FIG. 3, a ventilation layer 90 is formed between the exterior material 88 and the heat insulating material 74. The ventilation layer 90 communicates with outside air, and air (indicated by an arrow) can flow through the ventilation layer 90.

  For example, ceramic siding or the like is used for the outer wall material 88, and the vertical joint 89 between the adjacent exterior materials 88 is filled with a sealing material (not shown). That is, the surface of the existing exterior material 56 is covered with the new exterior material 88.

<Insulation method of building>
As shown in FIG. 5, in the first step, a vent 82 is provided in the exterior material 56 in the existing outer wall 12. As shown in FIG. 3, in the second step, the upper portion of the ventilation layer 76 in the outer wall 12 and Airflow stoppers 78 and 80 are disposed in the lower part, respectively.

  Next, as shown in FIGS. 4 and 5, in the third step, the ventilator edge 84 is disposed at a position facing the grooved frames 60, 61 on the outdoor 52 side of the exterior material 56. Further, in the fourth step, the heat insulating material 74 is disposed between the adjacent ventilation trunk edges 84, and in the laying step, the moisture permeable waterproof sheet 86 is laid on the surface of the heat insulating material 74. Further, in the fifth step, the exterior material 88 on the new outer wall 14 is attached to the ventilator edge 84. In the first to fifth steps, the order of the steps is not limited.

<Operation and effect of heat insulation structure of building>
As shown in FIG. 3, in this embodiment, when a new outer wall 14 is provided on the outdoor 52 side of the existing outer wall 12, an airflow stopper 78, respectively, is provided on the upper and lower portions of the ventilation layer 76 on the existing outer wall 12. 80 is arranged. For this reason, in the existing outer wall 12, the flow of the air along the height direction of the existing outer wall 12 is prevented or suppressed.

  Further, since the exterior material 56 in the existing outer wall 12 is provided with a vent 82, the air in the vent layer 76 of the existing outer wall 12 is transferred to the vent layer 90 of the new outer wall 14 through the vent 82. Can be guided in. Since the ventilation layer 90 communicates with the outside air, moisture in the outer wall 12 can be released to the outdoor 52 side via the ventilation layer 90. Thereby, even if the outer wall 14 is newly attached to the outdoor 52 side of the existing outer wall 12, internal dew condensation can be suppressed or prevented in the outer wall 12.

  In the present embodiment, as shown in FIG. 4, a plurality of ventilation trunk edges 84 are arranged on the outdoor 52 side of the exterior member 56, and a heat insulating material 74 is provided between the ventilation trunk edges 84 adjacent to each other. It is arranged. In addition, an exterior material 88 as a new exterior material is attached on the outdoor 52 side of the ventilation trunk edge 84, and a ventilation layer 90 is set between the exterior material 88 and the heat insulating material 74. Yes.

  Furthermore, in the present embodiment, the ventilation shell edge 84 is disposed on the exterior material 56 in the existing outer wall 12, and the exterior material 88 in the new outer wall 14 is attached to the exterior material 56 via the ventilation drum edge 84. Thus, it is possible to save the labor of peeling off the existing outer wall 12 and to greatly reduce the number of work steps involved in the repair of the outer wall 12. Further, at the time of renovation, the material, color, design, etc. of the exterior material 88 of the new outer wall 14 can be changed from the material, color, design, etc. of the exterior material 56 of the existing outer wall 12.

  In the present embodiment, a moisture-permeable waterproof sheet 86 is laid on the surface of the heat insulating material 74. The moisture permeable waterproof sheet 86 is a waterproof sheet having a property of allowing moisture to pass but not allowing water to pass. For this reason, while moisture in the existing outer wall 12 is released to the new outer wall 14 side, moisture passing through the ventilation layer 90 in the new outer wall 14 can be prevented from passing to the existing outer wall 12 side. Internal condensation can be suppressed or prevented in the existing outer wall 12. That is, it is possible to prevent moisture from entering the existing outer wall 12 through the vent 82. In addition, the bag body 75 itself in which the heat insulating material 74 is accommodated may be formed of a moisture permeable waterproof sheet.

(Other embodiments)
When the new outer wall 14 is attached to the existing outer wall 12 shown in FIG. 5, braces 92 that cross each other are disposed on the exterior 52 side of the exterior material 56 of the outer wall 12 as shown in FIG. 6B. May be.

  In this case, as shown in FIG. 6C, through holes 93 are respectively formed in the exterior material 56 and the ceiling beam 42, the exterior material 56 and the floor beam 20, and the one-side bolt 94 is inserted into the through hole 93. Then, the upper end portion of the brace 92 is fixed to the ceiling beam 42 via the one-side bolt 94, and the lower end portion of the brace 92 is fixed to the floor beam 20 (brace arranging step).

  As a result, the existing outer wall 12 is reinforced by the brace 92 as shown in FIG. As a result, the seismic strength of the building 10 can be improved as the outer wall 12 is repaired. Moreover, since the brace 92 for improving the seismic strength of the building 10 does not appear in the appearance, the aesthetic appearance is not impaired.

  When the brace 92 is disposed on the outdoor 52 side of the exterior material 56 of the outer wall 12 shown in FIG. 5, the ventilation trunk edge 96 disposed on the exterior material 88 interferes with the brace 92 as shown in FIG. The portion to be cut is arranged in a cut state.

  In the present embodiment, as shown in FIG. 6B, braces 92 are arranged along the diagonal lines on the outer wall 12 of the building 10, but the entrances (not shown) provided in the building 10 It can be appropriately changed depending on the position of the window.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

10 Building 12 Exterior wall (existing exterior wall)
14 Outer wall (new outer wall)
20 Floor girder 42 Ceiling girder 52 Outdoor 56 Exterior material (existing exterior material)
74 Heat insulation material 76 Ventilation layer (existing ventilation layer)
78 Airflow stop 80 Airflow stop 82 Vent hole 84 Vent trunk edge 86 Moisture permeable waterproof sheet 88 Exterior material (new exterior material)
90 Ventilation layer (new ventilation layer)
92 Brace 96 Venting trunk edge

Claims (7)

A vent through the existing exterior material in the existing outer wall;
A new outer wall provided on the outdoor side of the existing outer wall;
A heat insulating material provided in the new outer wall and disposed on the outdoor side of the existing exterior material;
A new exterior material that is part of the new outer wall and is disposed in a state in which a new ventilation layer communicating with the ventilation hole is provided between the heat insulation material;
Building insulation structure.   The heat insulating structure for a building according to claim 1, wherein an airflow stopper is provided in an existing ventilation layer in the existing outer wall.   The heat insulating structure for a building according to claim 1 or 2, wherein a moisture permeable waterproof sheet is laid on the surface of the heat insulating material.   The heat insulation structure of the building of any one of Claims 1-3 by which the brace is arrange | positioned by the outdoor side in the said existing exterior material. A first step of causing the existing exterior material in the existing outer wall according to any one of claims 1 to 4 to penetrate the vent;
A second step of disposing an airflow stop on the existing vent layer in the existing outer wall;
A third step of disposing a ventilation trunk edge on the outdoor side of the existing exterior material;
A fourth step of disposing a heat insulating material on the outdoor side of the existing exterior material;
A fifth step of attaching a new exterior material in the new outer wall according to any one of claims 1 to 4 to the ventilator rim,
Insulating method of building having.   The building heat insulation method according to claim 5, further comprising a laying step of laying a moisture permeable waterproof sheet on a surface of the heat insulating material.   The brace arrangement | positioning process which arrange | positions a brace in the outdoor side in the said existing exterior material, fixes the one end part of the said brace to a ceiling girder, and fixes the other end part of the said brace to a floor girder. 6. A heat insulating method for a building according to 6.

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