Airtight component, building using the same, and construction method thereof

Abstract

To easily secure airtightness between two surfaces facing each other and airtightness along the direction orthogonal to the two surfaces.SOLUTION: Airtight components include a floor backing material 6 having a lower surface 6a, a beam transverse heating material 7a having an upper surface 7a1 and an inner surface 7a2 extending from the upper surface 7a1 in a direction perpendicular thereto, and an airtight sheet 7b having a sandwiched part 7b1 sandwiched between the lower surface 6a and the upper surface 7a1 and an extension part 7b2 extending from the sandwiched part 7b1 beyond the edge part adjacent to the inner surface 7a2 on the upper surface 7a1 and fixed to the beam transverse heating material 7a. The sandwiched part 7b1 is formed of a thermoplastic material that can be melted so as to fill the gap between the lower surface 6a and the upper surface 7a1 by applying heat at a predetermined temperature or higher while being sandwiched between the lower surface 6a and the upper surface 7a1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a building using an airtight component member.

Background Art

[0002] Conventionally, as a building having an airtight component member, for example, the building described in Patent Document 1 is known.

[0003] The building described in Patent Document 1 includes a roof purlin, a gable beam, a first drying surface material provided so as to cover the upper surfaces of the roof purlin and the gable beam, and a superstructure heat insulating material fixed to the upper surface of the first drying surface material. The first drying surface material is composed of a sheet such as polycarbonate.

[0004] Furthermore, the building of the patent document includes a second drying surface material extending in the surface direction (direction along the outer wall surface) outside the gable beam, and a plate-shaped heat insulating material for forming external heat insulation provided outside the second drying surface material. The second drying surface material has the same configuration as the first drying surface material. Also, the second drying surface material is disposed in close contact with one end portion of the superstructure heat insulating material in order to ensure airtightness with the first drying surface material. That is, one end portion of the superstructure heat insulating material is provided so as to abut against the second drying surface material. Furthermore, Patent Document 1 discloses that it is preferable to interpose an airtight tape at the outer joint portion of the second drying surface material.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in order to arrange two members facing each other in close contact as described in Patent Document 1, high-precision dimensional control is required at the construction site. Further, the operation of continuously attaching an airtight tape across two members having surfaces orthogonal to each other and from one end to the other end of the joint portion is a very labor-intensive operation.

[0007] An object of the present invention is to provide an airtight component capable of easily ensuring airtightness between two opposing surfaces and airtightness along a direction orthogonal to the two surfaces, a building using the same, and a construction method thereof.

Means for Solving the Problems

[0008] To solve the above problems, a first invention is an airtight component, comprising: a first member having a first surface; a second member having a second surface and an orthogonal surface extending from the second surface in a direction orthogonal to the second surface; a sandwiched portion sandwiched between the first surface and the second surface; and an extending portion extending from the sandwiched portion beyond an edge portion adjacent to the orthogonal surface on the second surface, and further comprising an airtight sheet fixed to the second member, wherein the sandwiched portion is formed of a thermoplastic material that can be melted to fill a gap between the first surface and the second surface by applying heat of a predetermined temperature or higher while being sandwiched between the first surface and the second surface.

[0009] According to the first invention, the airtight sheet is fixed to the second member. Therefore, when assembling the first member, the second member and the airtight sheet can be handled integrally, and the workability of attachment is improved as compared with the case where the second member and the airtight sheet are separate members.

[0010] Furthermore, the airtight sheet has an extending portion extending from the sandwiched portion beyond an edge portion adjacent to the orthogonal surface on the second surface. Therefore, the extending portion can be arranged along the orthogonal surface of the second member in a state where the sandwiched portion is sandwiched between the first surface and the second surface.

[0011] The clamped part is formed of a thermoplastic material that can be melted to fill the gap between the first surface and the second surface by applying heat equal to or higher than a predetermined temperature. Therefore, by heating the clamped part sandwiched between the first surface and the second surface with, for example, a heat gun, the gap between the first surface and the second surface can be filled.

[0012] Therefore, according to the first invention, it is possible to easily ensure the airtightness between two opposing surfaces and the airtightness along the direction orthogonal to the two surfaces.

[0013] According to a second invention, in the first invention, the extending part includes a covering part having a width dimension capable of covering the entire orthogonal surface in the width direction orthogonal to the second surface and the third surface orthogonal to the orthogonal surface, and an excess part extending from the covering part toward one side in the width direction.

[0014] According to the second invention, there is an excess part extending from a covering part capable of covering the entire orthogonal surface toward one side in the width direction. Therefore, by preparing a plurality of composites of the second member and the airtight sheet and arranging the plurality of composites so that the excess part of one composite is overlapped on the covering part of the other composite, the plurality of composites can be arranged so that the airtight sheet is continuous in the width direction.

[0015] A third invention includes the airtight component member of the first or second invention and a beam. The first member constitutes a floor base material provided on the beam, the second member constitutes a beam cross-insulation material provided on the indoor side of the beam, the clamped part is clamped between the first surface constituting the lower surface of the floor base material and the second surface constituting the upper surface of the beam cross-insulation material, and the extending part extends from the clamped part beyond the edge adjacent to the indoor side on the upper surface of the beam cross-insulation material, and it is a building.

[0016] According to the third invention, since there is a beam cross-insulation material, the heat insulation performance can be improved at the inner position of the beam.

[0017] Furthermore, the clamped portion is clamped between the lower surface of the floor underlay material and the upper surface of the beam cross-insulation material, and the extending portion extends from the clamped portion beyond the edge adjacent to the interior on the upper surface of the beam cross-insulation material. Thereby, by applying heat of a predetermined temperature to the clamped portion, the gap between the lower surface of the floor underlay material and the upper surface of the beam cross-insulation material can be filled, and the extending portion can be arranged along the inner surface of the beam cross-insulation material facing the interior. In particular, since the floor underlay material arranged on the beam is located at a high position, compared with the case of attaching a member to the boundary portion between the floor underlay material and the beam cross-insulation material to form an airtight state, the gap between the two members can be easily filled using a heat gun or the like.

[0018] Therefore, an airtight line can be easily formed between the floor underlay material and the beam cross-insulation material and on the inner surface of the beam cross-insulation material.

[0019] The fourth invention is, in the third invention, the building further includes an under-beam insulation material provided under the beam, and the extending portion has a vertical length capable of covering the entire vertical direction of the inner surface facing the interior side in the beam cross-insulation material and constituting the orthogonal plane, and the entire vertical direction of the inner surface facing the interior side of the under-beam insulation material.

[0020] According to the fourth invention, the entire vertical direction of the inner surface of the beam cross-insulation material and the inner surface of the under-beam insulation material can be covered by the extending portion. Therefore, compared with the case of splicing a plurality of airtight sheets in the vertical direction, an airtight line can be easily formed from the floor underlay material through the beam cross-insulation material to the lower end portion of the under-beam insulation material.

[0021] By forming an airtight line with respect to both insulation materials in this way, it is possible to suppress the entry of high-humidity air in the room into the beam cross-insulation material and the under-beam insulation material, and thus it is possible to suppress the occurrence of condensation inside the insulation materials when these insulation materials are cooled by the outside air.

[0022] A fifth invention, in the third or fourth invention, the building further includes a foundation provided under the beam and having a support portion for supporting the beam, and an in-foundation heat insulator provided along an inner surface facing the indoor side of the support portion, and the extending portion has a vertical length capable of covering the entire vertical direction of the inner surface facing the indoor side of the beam cross heat insulator and at least a part of the inner surface facing the indoor side of the in-foundation heat insulator.

[0023] According to the fifth invention, since there is an in-foundation heat insulator, heat transfer through the support portion of the foundation can be suppressed. Moreover, since the extending portion can cover the entire vertical direction of the inner surface of the beam cross heat insulator and at least a part of the in-foundation heat insulator, an airtight line can be easily formed on the inner surface of the in-foundation heat insulator as compared with the case of splicing a plurality of airtight sheets in the vertical direction.

[0024] A sixth invention, in the fifth invention, the foundation has a horizontal portion that extends in the horizontal direction and has a peripheral portion where the support portion is erected, and the extending portion has a vertical length connectable to the horizontal portion.

[0025] According to the sixth invention, the extending portion has a length connectable to the horizontal portion of the foundation. Therefore, the entire vertical direction of the inner surface of the in-foundation heat insulator can be covered by the extending portion. Therefore, an airtight line can be more easily formed over the entire vertical direction of the in-foundation heat insulator.

[0026] In this way, by forming an airtight line over the entire vertical direction of the inner surface of the in-foundation heat insulator, it is possible to suppress the entry of highly humid air in the room into the in-foundation heat insulator, and thus suppress the occurrence of condensation inside the in-foundation heat insulator when the in-foundation heat insulator is cooled by the outside air.

[0027] Moreover, the present invention (the seventh invention) is a method for constructing a building according to the third invention, which provides a method for constructing a building by applying heat of a predetermined temperature or higher to the clamped portion to fill the gap between the lower surface of the floor base material and the upper surface of the beam cross-insulation material.

[0028] According to the present invention (the seventh invention), the gap between the floor base material and the beam cross-insulation material can be filled by applying heat of a predetermined temperature or higher to the clamped portion. Here, since the floor base material arranged on the beam is located at a high position, compared with the case of attaching a member to the boundary portion between the floor base material and the beam cross-insulation material to form an airtight state, the gap between the two members can be easily filled using a heat gun or the like.

[0029] The eighth invention is, in the seventh invention, to prepare an inner wall base having an internal space, install an under-beam insulation material under the beam, fix the extending portion in a state of covering the inner surface of the beam cross-insulation material and the inner surface of the under-beam insulation material, and then install the inner wall base at the indoor side position of the extending portion.

[0030] According to the eighth invention, the inner surfaces of the beam cross-insulation material and the under-beam insulation material can be covered by the extending portion. Therefore, compared with the case of splicing a plurality of airtight sheets in the vertical direction, an airtight line can be easily formed between the floor base material, through the beam cross-insulation material, to the under-beam insulation material.

[0031] Furthermore, an inner wall base having an internal space can be provided at the indoor side position of the extending portion. Therefore, by performing wiring or the like using the internal space, wiring or the like can be performed without breaking the extending portion, that is, the airtight line.

Effects of the Invention

[0032] According to the present invention, airtightness between two mutually facing surfaces and airtightness along the direction orthogonal to the two surfaces can be easily ensured.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Best Mode for Carrying Out the Invention

[0034] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the following embodiments are examples embodying the present invention and do not have the character of limiting the technical scope of the present invention.

[0035] FIG. 1 is a side cross-sectional view of a building according to a first embodiment of the present invention. Further, FIG. 2 is a side cross-sectional view showing a state in which a building shown in FIG. 1 is cut at a position where support structures of a heat insulating material under a beam, a ceiling base, and an inner wall base appear.

[0036] Referring to FIGS. 1 and 2, a building 1 according to the first embodiment includes a structural frame 2, an outer wall 3 supported by the structural frame 2, an inner wall base 4, an attachment mechanism 5 for attaching the inner wall base 4 inside the outer wall 3, a floor base material 6 constituting the floor of the upper floor (the second floor in this embodiment), and a plurality of airtight members 7 (an example of a first member: refer to FIG. 13) for constituting an airtight layer along the outer wall 3 from the floor base material 6.

[0037] The structural frame 2 has a foundation 2a, an outer peripheral beam (an example of a beam) 2b extending horizontally along the outer periphery of the building 1, a first inner beam 2c (extending parallel to the outer peripheral beam 2b: refer to FIG. 1) and a second inner beam 2d (extending in a direction orthogonal to the outer peripheral beam 2b: refer to FIG. 2) extending from the outer peripheral beam 2b to the inside of the outer peripheral beam 2b.

[0038] The foundation 2a has a horizontal portion 2a1 extending horizontally along the site of the building 1 and a support portion 2a2 rising from the periphery of the horizontal portion 2a1 along the outer periphery of the building 1. The support portion 2a2 is for supporting the outer peripheral beam 2b via a column (not shown).

[0039] The outer peripheral beam 2b is supported on the support portion 2a2 by a column (not shown) provided on the upper surface of the support portion 2a2. Specifically, the outer peripheral beam 2b is composed of an H-shaped steel having a pair of flanges 2b1 and a web 2b2 connecting the central portions of both flanges 2b1. Further, the outer peripheral beam 2b is supported by the column (not shown) with both flanges 2b1 in a horizontal posture. A soft heat insulating material (for example, a heat insulating material composed of glass wool) 2b3 is provided between both flanges 2b1 of the outer peripheral beam 2b.

[0040] Similar to the outer peripheral beam 2b, the first inner beam 2c is composed of an H-shaped steel having a pair of flanges 2c1 and a web 2c2 connecting the central portions of both flanges 2c1. As shown in FIG. 2, similar to the first inner beam 2c, the second inner beam 2d is also composed of an H-shaped steel having a pair of flanges 2d1 (only one is shown in FIG. 2) and a web 2d2 connecting the central portions of the flanges 2d1.

[0041] The outer wall 3 includes an outer wall panel 3a, a beam-bottom heat insulator 3b provided inside the outer wall panel 3a, and a soft heat insulator 3c provided between the outer wall panel 3a and the beam-bottom heat insulator 3b. The outer wall panel 3a is attached to the support portion 2a2 of the foundation 2a and the flange 2b1 of the outer peripheral beam 2b via mounting brackets 3a1 and 3a2. The beam-bottom heat insulator 3b is provided below the outer peripheral beam 2b, specifically, between the outer peripheral beam 2b and the foundation 2a. Specifically, the beam-bottom heat insulator 3b is positioned horizontally with respect to the flange 2b1 by a positioning member 3b1 (see FIG. 2) or the like while being sandwiched between the lower surface of the flange 2b1 of the outer peripheral beam 2b and the support portion 2a2 of the foundation 2a. The positioning member 3b1 is inserted into a recess 3b2 formed on the upper surface of the beam-bottom heat insulator 3b through a hole 2b1a penetrating the flange 2b1 vertically. By this positioning member 3b1, the beam-bottom heat insulator 3b is arranged in the following position. First, the inner surface 3b3 facing the indoor side of the beam-bottom heat insulator 3b is arranged outside the inner surface 2a2b facing the indoor side of the support portion 2a2 so that a contact surface 2a2a remains inside the beam-bottom heat insulator 3b on the upper surface of the support portion 2a2 of the foundation 2a. Also, the inner surface 3b3 of the beam-bottom heat insulator 3b is arranged inside the end surface on the indoor side of the flange 2b1 so that a placement surface 3b4 remains inside the flange 2b1 on the upper surface of the beam-bottom heat insulator 3b. Note that the beam-bottom heat insulator 3b is a rigid heat insulator made of urethane foam or the like. The soft heat insulator 3c is provided between the upper surface of the support portion 2a2 of the foundation 2a and the flange 2b1 of the outer peripheral beam 2b. Also, the soft heat insulator 3c is attached to the outer peripheral beam 2b in a state of being separated from the outer wall panel 3a to form a ventilation passage between the soft heat insulator 3c and the outer wall panel 3a. The soft heat insulator 3c is composed of, for example, glass wool or the like.

[0042] The inner wall base has an internal space for wiring and the like. Specifically, the inner wall base 4 has a plurality of studs 4a (only one is shown in the figure) that extend in the vertical direction and are arranged at intervals in the horizontal direction (the depth direction of the paper surface in FIGS. 1 and 2), and a plurality of inner wall surface members 4b (only one is shown in the figure) that are attached to the inner surfaces of the plurality of studs 4a facing the indoor side and are arranged in the horizontal direction (the same as above). Thus, an internal space is formed between adjacent studs 4a and outside the inner wall surface member 4b.

[0043] The attachment mechanism 5 is for attaching the inner wall base 4 to the inside of the outer wall 3. Specifically, the attachment mechanism 5 has a ceiling base 5a that supports the upper end portion of the inner wall base 4, a floor base 5b that supports the lower end portion of the inner wall base 4, an upper connecting member 5c for connecting the ceiling base 5a and the upper end portion of the inner wall base 4, and a lower connecting member 5d for connecting the floor base 5b and the lower end portion of the inner wall base 4.

[0044] As shown in Fig. 2, the ceiling base 5a includes a plurality of hanging tools 5a1 (only one is shown in Fig. 2) attached to the flange 2d1 of the second inner beam 2d, a plurality of edge supports 5a2 (only one is shown in Fig. 2) suspended from the second inner beam 2d by the hanging tools 5a1, a plurality of edges 5a3 (only one is shown in Fig. 2) attached to the lower surface of the edge support 5a2, and a ceiling surface material 5a4 attached to the lower surface of the edge 5a3. Each edge support 5a2 extends parallel to the second inner beam 2d below the second inner beam 2d. Each edge 5a3 extends in a direction orthogonal to the edge support 5a2 on the horizontal plane. The ceiling surface material 5a4 is fixed to the edge 5a3 by screws or the like (not shown) in a state of being in close contact with the lower surfaces of the plurality of edges 5a3. Further, the edge portion of the ceiling surface material 5a4 adjacent to the outer peripheral beam 2b is in close contact with the region other than the region 5a3a by opening the region 5a3a adjacent to the outer peripheral beam 2b on the lower surface of the edge 5a3. An upper connecting member 5c is attached to the region 5a3a of the edge 5a3. The upper connecting member 5c forms a groove that opens downward and extends along the outer peripheral beam 2b in order to receive the upper end portions of the studs 4a of the inner wall base 4 described above. Specifically, the upper connecting member 5c includes a bottom surface portion 5c1 attached to the region 5a3a of the edge 5a3, an inner side portion 5c2 extending downward from the inner edge of the bottom surface portion 5c1, and an outer side portion 5c3 extending downward from the outer edge of the bottom surface portion 5c1. The upper end portions of the plurality of studs 4a are inserted between the inner side portion 5c2 and the outer side portion 5c3 of the upper connecting member 5c.

[0045] Referring to FIG. 1, the floor substructure 5b includes a plurality of bundles 5b1 (only one is shown in FIG. 1) erected on the horizontal portion 2a1 of the foundation 2a, a plurality of large battens 5b2 (only one is shown in FIG. 1) provided on the bundles 5b1 and extending horizontally, a joist 5b3 provided on the large battens 5b2 and extending in a direction orthogonal to the large battens 5b2, and a floor material 5b4 provided on the joist 5b3. A lower connecting member 5d is attached to a region 5b4a adjacent to the outer peripheral beam 2b on the upper surface of the floor material 5b4. The lower connecting member 5d forms a groove that opens upward and extends along the outer peripheral beam 2b in order to receive the lower end portion of the stud 4a of the inner wall substructure 4 described above. Specifically, the lower connecting member 5d has a bottom surface portion 5d1 attached to the region 5b4a of the floor material 5b4, an inner side portion 5d2 extending upward from the inner edge of the bottom surface portion 5d1, and an outer side portion 5d3 extending upward from the outer edge of the bottom surface portion 5d1. The lower end portions of a plurality of studs 4a are inserted between the inner side portion 5d2 and the outer side portion 5d3 of the lower connecting member 5d.

[0046] In this way, by inserting the upper and lower end portions of the stud 4a into the upper connecting member 5c and the lower connecting member 5d shown in FIGS. 1 and 2, the inner wall substructure 4 is attached inside the outer wall 3.

[0047] The floor substructure material 6 is supported by the outer peripheral beam 2b in a state of being placed on the outer peripheral beam 2b. The floor substructure material 6 includes a floor material placed on the outer peripheral beam 2b and the inner beams 2c, 2d. The floor material in the present embodiment is composed of, for example, lightweight cellular concrete such as ALC.

[0048] The airtight member 7 includes a beam cross-insulation material 7a (an example of a second member) provided on the indoor side of the outer peripheral beam 2b, and an airtight sheet 7b fixed to the beam cross-insulation material 7a.

[0049] FIG. 3 is a plan view showing the airtight member used in the building of FIG. 1. FIG. 4 is a front view of the airtight member shown in FIG. 3. FIG. 5 is a side view of the airtight member shown in FIG. 3.

[0050] Referring to FIGS. 3 to 5, the beam cross-section heat insulating material 7a is a rigid heat insulating material made of foamed urethane or the like. Further, the beam cross-section heat insulating material 7a has an upper surface 7a1 (an example of a second surface) facing the lower surface 6a (an example of a first surface: FIG. 1) of the floor base material 6, an inner surface 7a2 orthogonal to the upper surface 7a1 and facing the indoor side, an outer surface 7a3 facing the opposite side of the inner surface 7a2, and a side surface 7a4 (an example of a third surface) orthogonal to the upper surface 7a1 and the inner surface 7a2.

[0051] The airtight sheet 7b has a sandwiched portion 7b1 sandwiched between the lower surface 6a of the floor base material 6 and the upper surface 7a1 of the beam cross-section heat insulating material 7a, an extending portion 7b2 extending from the sandwiched portion 7b1 beyond the edge adjacent to the indoor side on the upper surface 7a1 of the beam cross-section heat insulating material 7a, and a fixed portion 7b3 extending from the sandwiched portion 7b1 in a direction opposite to the extending portion 7b2 and fixed to the outer surface facing the outdoor side of the beam cross-section heat insulating material 7a. Before application to the building, the airtight sheet 7b is fixed to the beam cross-section heat insulating material 7a only at the fixed portion 7b3, and the sandwiched portion 7b1 and the extending portion 7b2 are released from the beam cross-section heat insulating material 7a so as to be relatively displaceable with respect to the beam cross-section heat insulating material 7a.

[0052] In this embodiment, the airtight sheet 7b having the fixed portion 7bc provided along the outer surface 7a3 of the beam cross-section heat insulating material 7a has been described. However, the airtight sheet 7b only needs to have at least the sandwiched portion 7b1 and the extending portion 7b2. In this case, the airtight sheet 7b only needs to be fixed to the beam cross-section heat insulating material 7a at at least one of the sandwiched portion 7b1 and the extending portion 7b2. Further, in this embodiment, the sandwiched portion 7b1 covering the entire upper surface 7a1 of the beam cross-section heat insulating material 7a has been described. However, the sandwiched portion 7b1 only needs to cover at least a part of the upper surface 7a1 of the beam cross-section heat insulating material 7a.

[0053] The sandwiched portion 7b1 is formed of a heat - fusible thermoplastic material that fills the gap between the lower surface 6a of the floor underlay material 6 and the upper surface 7a1 of the beam cross - heat - insulating material 7a when heat of a predetermined temperature (80° to 550°) or higher is applied while being sandwiched between the lower surface 6a of the floor underlay material 6 and the upper surface 7a1 of the beam cross - heat - insulating material 7a. The predetermined temperature is set within a temperature range that does not adversely affect the floor underlay material 6 and the beam cross - heat - insulating material 7a. Examples of the thermoplastic resin material include polyethylene, polypropylene, polyvinyl chloride, etc. In this embodiment, not only the sandwiched portion 7b1 but also the entire airtight sheet 7b is formed of the thermoplastic resin material. Further, an airtight spray made of a liquid paint or the like having the property of curing in a state where the gap between the floor underlay material 6 and the sandwiched portion 7b1 is filled may be applied between the floor underlay material 6 and the sandwiched portion 7b1.

[0054] The extending portion 7b2 has a covering portion 7b2a that can cover the entire inner surface 7a2 and has a width dimension in the width direction (the left - right direction in FIGS. 3 and 4) orthogonal to the surface (an example of the third surface) orthogonal to the upper surface 7a1 and the side surface 7a4 of the beam cross - heat - insulating material 7a, and an excess portion 7b2b extending from the covering portion 7b2a in one direction (the right - hand side in FIGS. 3 and 4) of the width direction. Therefore, as shown in FIG. 13, by arranging a plurality of airtight members 7 in the width direction so that the excess portion 7b2b of another airtight member 7 is overlapped with the covering portion 7b2a of one airtight member 7 from the indoor side, the inner side surface of the inner wall surface material 4b can be covered by a plurality of airtight sheets 7b over the entire width direction.

[0055] Also, as shown in FIG. 1, the extending portion 7b2 has a vertical length that can cover the entire vertical direction of the inner surface 7a2 of the beam cross - heat - insulating material 7a and the entire vertical direction of the inner surface 3b3 of the beam lower - heat - insulating material 3b. Thereby, in a situation where the indoor temperature is higher than the outdoor temperature in winter or the like, it is possible to suppress the entry of highly humid air in the room into the beam cross - heat - insulating material 7a and the beam lower - heat - insulating material 3b. Therefore, it is possible to prevent dew condensation from occurring in both heat - insulating materials 3b and 7a when the beam cross - heat - insulating material 7a and the beam lower - heat - insulating material 3b are cooled by outside air.

[0056] Furthermore, the extension portion 7b2 also prevents condensation from occurring in the foundation heat insulating material 8 provided on the foundation 2a.

[0057] First, the foundation heat insulating material 8 provided on the foundation 2a will be described. The building 1 further has a foundation heat insulating material 8 provided on the indoor side of the support portion 2a2 of the foundation 2a. The foundation heat insulating material 8 includes a foundation inner heat insulating material 8a provided along the inner surface 2a2b of the support portion 2a2, a lower heat insulating material 8b provided along the horizontal portion 2a1 inside the foundation inner heat insulating material 8a, and an upper heat insulating material 8c provided on the lower heat insulating material 8b inside the foundation inner heat insulating material 8a. The foundation inner heat insulating material 8a is fixed on the horizontal portion 2a1 in a state of being in close contact with the inner surface 2a2b of the support portion 2a2 and the upper surface of the horizontal portion 2a1. Further, it has a contact portion 8a1 that is in close contact with the inner surface 2a2b of the support portion 2a2, and an extension portion 8a2 that extends from the contact portion 8a1 to a position above the contact surface 2a2a (upper surface) of the support portion 2a2. Due to the provision of the extension portion 8a2, a groove RE1 that opens upward and extends in the horizontal direction (the depth direction of the paper surface in FIG. 1) is formed between the support portion 2a2, the beam lower heat insulating material 3b, and the foundation inner heat insulating material 8a. The building 1 has a fitting member 9 that fits into the groove RE1, and the fitting member 9 fits into the groove RE1 such that a part of the extension portion 7b2 is sandwiched between it and the inner surface of the groove RE1. By this fitting, the extension portion 7b2 is held in a state where tension is applied so as to be in close contact with the inner surface 7a2 of the beam cross heat insulating material 7a, the inner surface 3b3 of the beam lower heat insulating material 3b, and the inner surface of the groove RE1. Furthermore, the extension portion 7b2 is arranged along the inner surface of the foundation inner heat insulating material 8a and is attached to the foundation 2a in a state of being connected to the upper surface of the horizontal portion 2a1. Specifically, the extension portion 7b2 has a vertical length that can be connected to the horizontal portion 2a1, and the lower heat insulating material 8b and the upper heat insulating material 8c are fixed to the foundation 2a in a state of sandwiching the portion arranged along the inner surface of the foundation inner heat insulating material 8a in the extension portion 7b2. Thus, since the extension portion 7b2 is connected to the upper surface of the horizontal portion 2a1 of the foundation 2a, it is possible to suppress the entry of high-humidity indoor air into the foundation inner heat insulating material 8a, and thus it is possible to prevent condensation from occurring in the foundation inner heat insulating material 8a when the foundation inner heat insulating material 8a is cooled by the outside air.

[0058] As described above, the floor underlay material 6 (first member), the beam cross-insulation material 7a (second member), and the airtight sheet 7b constitute the airtight component members.

[0059] Hereinafter, a construction method of the building 1 using the airtight component members will be described with reference to FIGS. 6 to 13.

[0060] First, as shown in FIG. 6, the basic structure of the building 1 is prepared. The basic structure has the structural frame 2, the outer wall 3, and the floor underlay material 6, and is the structure before the inner wall base 4, the attachment mechanism 5, the airtight member 7, the foundation insulation material 8, and the fitting member 9 are provided.

[0061] With respect to the basic structure of the building 1, as shown in FIG. 7, the airtight member 7 is attached. Specifically, the beam cross-insulation material 7a is fitted between the lower surface 6a of the floor underlay material 6 and the placement surface 3b4 of the beam bottom insulation material 3b. At this time, while adjusting the orientation of the airtight sheet 7b so that the fixed portion 7b3 of the airtight sheet 7b faces outward and the extending portion 7b2 of the airtight sheet 7b is located inside the beam cross-insulation material 7a, the beam cross-insulation material 7a is fitted between the floor underlay material 6 and the beam bottom insulation material 3b. As a result, the sandwiched portion 7b1 of the airtight sheet 7b is sandwiched between the lower surface 6a of the floor underlay material 6 and the upper surface 7a1 of the beam cross-insulation material 7a.

[0062] Furthermore, as shown in FIG. 13, another airtight member 7 is attached to the basic structure separately from the above. Specifically, another airtight member 7 is attached at a position opposite to the surplus portion 7b2b in the previously attached airtight member 7. Here, the surplus portion 7b2b of the other airtight member 7 covers the airtight sheet 7b of the previously attached airtight member 7 from the indoor side, and the beam cross-insulation material 7a of the other airtight member 7 is in close contact with the side surface in the width direction of the beam cross-insulation material 7a of the previously attached airtight member 7 (the surface facing left in FIG. 13), and the beam cross-insulation material 7a of the other airtight member 7 is fitted between the floor underlay material 6 and the beam bottom insulation material 3b. Then, the two airtight sheets 7b are connected in an airtight state by attaching a tape or the like along the edge of the surplus portion 7b2b in a state spanning the surplus portion 7b2b of the other airtight member 7 and the airtight sheet 7b of the previously attached airtight member 7.

[0063] Then, by applying heat at a predetermined temperature to the clamped portion 7b1 of the airtight sheet 7b of the airtight member 7 attached to the basic structure, the clamped portion 7b1 is melted to fill the gap between the lower surface 6a of the floor base material 6 and the upper surface 7a1 of the beam cross heat insulating material 7a. Note that the melting process of the clamped portion 7b1 may be performed each time an airtight member 7 is attached, or may be performed after all the airtight members 7 are attached. Further, in addition to the melting of the clamped portion 7b1, an airtight spray made of a liquid paint or the like having a property of curing in a state where the gap between the floor base material 6 and the clamped portion 7b1 is filled may be applied between the floor base material 6 and the clamped portion 7b1.

[0064] Next, as shown in FIGS. 2 and 8, a part of the ceiling base 5a is attached to the inner beam 2d. Specifically, a plurality of hanging tools 5a1 are attached to the flange 2d1 of the inner beam 2d, a plurality of edge receivers 5a2 are attached to the hanging tools 5a1, and a plurality of edges 5a3 are attached to the lower surface of the edge receiver 5a2.

[0065] Next, as shown in FIG. 9, a part of the floor base material 6 is attached to the foundation 2a. Specifically, as shown in FIG. 9, a plurality of bundles 5b1 are erected on the horizontal portion 2a1 of the foundation 2a, and a plurality of large pulls 5b2 are installed on the bundles 5b1.

[0066] Next, as shown in FIG. 10, the base heat insulating material 8 is installed so as to avoid the bundle 5b1 on the horizontal portion 2a1. Specifically, the base inner heat insulating material 8a is fixed to the base 2a in a state of being in close contact with the inner surface 2a2b of the support portion 2a2 of the base 2a and the upper surface of the horizontal portion 2a1. As a result, a groove RE1 is formed between the base inner heat insulating material 8a, the heat insulating material 3b under the beam, and the support portion 2a2. Then, the extending portion 7b2 of the airtight sheet 7b is along the inner surface 3b3 of the heat insulating material 3b under the beam, the inner surface of the groove RE1, the upper surface and the inner surface of the base inner heat insulating material 8a, and the lower end portion of the extending portion 7b2 is in contact with the horizontal portion 2a1 of the base 2a, and the lower heat insulating material 8b and the upper heat insulating material 8c are fixed to the base 2a. Here, the lower heat insulating material 8b and the upper heat insulating material 8c are fixed to the base 2a while sandwiching a part of the extending portion 7b2 between them and the base inner heat insulating material 8a. Therefore, by fixing the lower heat insulating material 8b and the upper heat insulating material 8c to the base 2a, the airtight sheet 7b is fixed to the base 2a. In addition, in order to surely connect the extending portion 7b2 to the horizontal portion 2a1, the base inner heat insulating material 8a or the lower heat insulating material 8b may be fixed to the base 2a so that the tip portion of the extending portion 7b2 is sandwiched between the base inner heat insulating material 8a or the lower heat insulating material 8b and the horizontal portion 2a1. When adopting the configuration in which the tip portion of the extending portion 7b2 is sandwiched between the base inner heat insulating material 8a or the lower heat insulating material 8b and the horizontal portion 2a1 in this way, instead of the above airtight member 7, a member having the base inner heat insulating material 8a or the lower heat insulating material 8b and the airtight sheet fixed thereto can also be used as the airtight member.

[0067] Next, as shown in FIG. 11, by fitting the fitted member 9 into the groove RE1, the extending portion 7b2 can be fixed in a state where tension is applied so as to be in close contact with the inner surface 7a2 of the cross beam heat insulating material 7a, the inner surface 3b3 of the heat insulating material 3b under the beam, and the inner surface of the groove RE1. The fitting of the fitted member 9 may be performed before the fixing of the lower heat insulating material 8b and the upper heat insulating material 8c to the base 2a described above. If it is done in that way, the fixing of the extending portion 7b2 up to the groove RE1 can be completed in the state before the fixing of the base inner heat insulating material 8a or the lower heat insulating material 8b.

[0068] Furthermore, as shown in FIG. 11, install the portions other than the bundle 5b1 and the large draw 5b2 of the floor base 5b. Specifically, install a plurality of joists 5b3 on the large draw 5b2 and install a floor material 5b4 on the joists 5b3. Note that reference numeral 10 in FIG. 11 is an interpolated heat insulating material 10 provided in the space between the joist 5b3 and the fitted member 9, and reference numeral 11 is a buffer material 11 for filling the gap between the interpolated heat insulating material 10 and the base heat insulating material 8.

[0069] Next, as shown in FIG. 12, attach the upper connecting member 5c to the region 5a3a of the edge 5a3 adjacent to the outer peripheral beam 2b and attach the lower connecting member 5d to the region 5b4a of the floor material 5b4 adjacent to the outer peripheral beam 2b. Further, fix a plurality of studs 4a at intervals in the horizontal direction with respect to both connecting members 5c and 5d. Specifically, insert the upper end portion of the stud 4a into the groove of the upper connecting member 5c and insert the lower end portion of the stud 4a into the groove of the lower connecting member 5d, and then fix the stud 4a to both connecting members 5c and 5d.

[0070] Then, by fixing a plurality of inner wall materials 4b to the stud 4a, the building 1 shown in FIG. 1 is completed.

[0071] In the above construction method, an example of attaching the airtight member 7 with the beam bottom heat insulating material 3b installed under the outer peripheral beam 2b has been described, but the beam bottom heat insulating material 3b may be installed after attaching the airtight member 7.

[0072] As described above, the airtight sheet 7b is fixed to the beam cross heat insulating material 7a. Therefore, when assembling to the floor base material 6, the beam cross heat insulating material 7a and the airtight sheet 7b can be handled integrally, and the workability of installation is improved as compared with the case where the beam cross heat insulating material 7a and the airtight sheet 7b are separate members.

[0073] Furthermore, the airtight sheet 7b has an extending portion 7b2 that extends from the clamped portion 7b1 beyond the edge adjacent to the inner surface 7a2 on the upper surface 7a1 of the beam cross-insulation material 7a. Therefore, the extending portion 7b2 can be arranged along the inner surface 7a2 of the beam cross-insulation material 7a with the clamped portion 7b1 clamped between the lower surface 6a of the floor base material 6 and the upper surface 7a1 of the beam cross-insulation material 7a.

[0074] And the clamped portion 7b1 is formed of a thermoplastic material that can be melted to fill the gap between the lower surface 6a and the upper surface 7a1 by applying heat above a predetermined temperature. Therefore, by heating the clamped portion 7b1 sandwiched between the lower surface 6a and the upper surface 7a1 with, for example, a heat gun or the like, the gap between the lower surface 6a and the upper surface 7a1 can be filled.

[0075] Therefore, it is possible to easily ensure the airtightness between the opposing lower surface 6a and upper surface 7a1, and the airtightness along the direction orthogonal to the lower surface 6a and the upper surface 7a1.

[0076] According to the first embodiment, the covering portion 7b2a that can cover the entire inner surface 7a2 of the beam cross-insulation material 7a has a surplus portion 7b2b that extends in one direction in the width direction. Therefore, by preparing a plurality of airtight members 7 and arranging the plurality of airtight members 7 such that the surplus portion 7b2b of one airtight member 7 is overlapped on the covering portion 7b2a of the other airtight member 7, the plurality of airtight members 7 can be arranged such that the airtight sheet 7b is continuous in the width direction.

[0077] According to the first embodiment, since the beam cross-insulation material 7a is provided, the heat insulation performance can be improved at the inner position of the outer peripheral beam 2b.

[0078] Furthermore, the clamped portion 7b1 is clamped between the lower surface 6a of the floor base material 6 and the upper surface 7a1 of the beam cross insulation material 7a, and the extending portion 7b2 extends from the clamped portion 7b1 beyond the edge adjacent to the interior on the upper surface 7a1 of the beam cross insulation material 7a. Thereby, by applying heat of a predetermined temperature to the clamped portion 7b1, the gap between the lower surface 6a of the floor base material 6 and the upper surface 7a1 of the beam cross insulation material 7a can be filled, and the extending portion 7b2 can be arranged along the inner surface 7a2 facing the interior of the beam cross insulation material 7a. In particular, since the floor base material 6 arranged on the outer peripheral beam 2b is located at a high position, compared with the case of attaching a member to the boundary portion between the floor base material 6 and the beam cross insulation material 7a to form an airtight state, the gap between the floor base material 6 and the beam cross insulation material 7a can be easily filled using a heat gun or the like.

[0079] Therefore, an airtight line can be easily formed between the floor base material 6 and the beam cross insulation material 7a and on the inner surface 7a2 of the beam cross insulation material 7a.

[0080] According to the first embodiment, the entire vertical direction of the inner surface 7a2 of the beam cross insulation material 7a and the inner surface 3b3 of the under-beam insulation material 3b can be covered by the extending portion 7b2. Therefore, compared with the case of splicing a plurality of airtight sheets in the vertical direction, an airtight line can be easily formed between the floor base material 6, through the beam cross insulation material 7a, to the lower end portion of the under-beam insulation material 3b.

[0081] In this way, by forming an airtight line for both insulation materials 3b and 7a, it is possible to suppress the entry of highly humid air in the room into the beam cross insulation material 7a and the under-beam insulation material 3b. Therefore, when these insulation materials 3b and 7a are cooled by the outside air, it is possible to suppress the occurrence of condensation inside the insulation materials 3b and 7a.

[0082] According to the first embodiment, the extending portion 7b2 has a length that can be connected to the horizontal portion 2a1 of the foundation 2a. Therefore, the entire vertical direction of the inner surface of the in-foundation insulation material 8a can be covered by the extending portion 7b2. Thereby, an airtight line can be formed more easily over the entire vertical direction of the in-foundation insulation material 8a.

[0083] In this way, by forming an airtight line over the entire vertical direction on the inner surface of the foundation internal heat insulating material 8a, it is possible to suppress the entry of high-humidity air in the room into the foundation internal heat insulating material 8a. Therefore, when the foundation internal heat insulating material 8a is cooled by the outside air, it is possible to suppress the occurrence of condensation inside the foundation internal heat insulating material 8a.

[0084] Furthermore, according to the construction method of the building 1 according to the first embodiment, by applying heat of a predetermined temperature or higher to the sandwiched portion 7b1, the gap between the floor base material 6 and the beam transverse heat insulating material 7a can be filled. Here, since the floor base material 6 disposed on the outer peripheral beam 2b is located at a high position, compared with the case of attaching a member to the boundary portion between the floor base material 6 and the beam transverse heat insulating material 7a to form an airtight state, the gap between the floor base material 6 and the beam transverse heat insulating material 7a can be easily filled using a heat gun or the like.

[0085] Also, according to the construction method of the building 1 according to the first embodiment, the inner surfaces of the beam transverse heat insulating material 7a and the beam bottom heat insulating material 3b can be covered by the extending portion 7b2. Therefore, compared with the case of splicing a plurality of airtight sheets in the vertical direction, an airtight line can be easily formed between the floor base material 6, through the beam transverse heat insulating material 7a, to the beam bottom heat insulating material 3b.

[0086] Furthermore, the inner wall base 4 having an internal space can be provided at the indoor side position of the extending portion 7b2. Therefore, by performing wiring or the like using the internal space, wiring or the like can be performed without breaking the extending portion 7b2, that is, without breaking the airtight line.

[0087] In the first embodiment, the configuration in which the extending portion 7b2 is connected to the horizontal portion 2a1 of the base 2a has been described. However, the extending portion 7b2 may cover at least a part of the inner surface of the base internal heat insulating material 8a without being connected to the base 2a. For example, as in the second embodiment shown in FIG. 14, the lower heat insulating material 8b may be arranged so as to extend inward from the inner surface 2a2b of the support portion 2a2, and the base internal heat insulating material 8a and the upper heat insulating material 8c may be arranged on the lower heat insulating material 8b. According to this configuration, since at least a part of the base internal heat insulating material 8a can be covered by the extending portion 7b2, an airtight line can be easily formed on the inner surface of the base internal heat insulating material 8a as compared with the case where a plurality of airtight sheets are joined in the vertical direction. Further, with respect to the portion of the inner surface of the base internal heat insulating material 8a covered by the extending portion 7b2, the entry of air containing moisture from the room can be prevented, so that the occurrence of dew condensation in the base internal heat insulating material 8a can be suppressed.

[0088] Further, unlike the extending portion 7b2 of the first embodiment, the vertical length of the extending portion 7b2 may be set to a length that cannot reach the horizontal portion 2a1, and another airtight sheet may be connected to the lower end portion of the extending portion 7b2 and the airtight sheet may be connected to the horizontal portion 2a1.

[0089] Assuming the above two cases, the extending portion 7b2 may have a vertical length capable of covering at least a part of the inner surface of the base internal heat insulating material.

[0090] Furthermore, in the above embodiment, the airtight member 7 applied to the configuration in which the lower surface (the lower surface of the flange 2b1) of the outer peripheral beam 2b and the lower surface (the lower surface of the flange 2c1) of the inner beam 2c are located on the same horizontal plane has been described. However, the form of the airtight member 7 is not limited to this. For example, the wooden building 1A shown in FIG. 15 has, in addition to the first inner beam 2cA1 having a lower surface located on the same horizontal plane as the lower surface of the outer peripheral beam 2bA, a second inner beam 2cA2 having a lower surface provided at a position higher than the lower surface of the outer peripheral beam 2bA. Therefore, the building 1A has a plurality of airtight members 7A that can be arranged avoiding the second inner beam 2cA2. Note that the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.

[0091] The airtight member 7A includes a beam heat insulation material 7aA provided on the indoor side of the outer peripheral beam 2bA, and an airtight sheet 7bA fixed to the beam heat insulation material 7aA.

[0092] As shown in FIGS. 15 and 16, the beam heat insulation material 7aA has a shape that can sandwich the second inner beam 2cA2 between other beam heat insulation materials 7aA adjacent in the width direction. Specifically, at both ends in the width direction of the upper part of the beam heat insulation material 7aA, a pair of recessed portions 7aA1 are formed that are recessed by a dimension corresponding to half of the width dimension of the second inner beam 2cA2 compared to other portions.

[0093] Also, the extending portion 7b2A of the airtight sheet 7bA has a covering portion 7b2A1 with a width dimension that can cover the entire side surface (the hatched area in FIG. 16) of the beam heat insulation material 7aA in the width direction, and a surplus portion 7b2A2 that extends from the covering portion 7b2A1 in one direction in the width direction (the left side in FIG. 16). The surplus portion 7b2A2 can cover the inner surface of the inner wall surface material 4b over the entire width direction together with another airtight sheet 7bA adjacent in the width direction.

[0094] Furthermore, in the building 1A of the third embodiment, unlike the first embodiment, the fitted member 9 is omitted, and the joist 5b3A extends to the vicinity of the inner surface 3b3 of the beam bottom heat insulation material 3b. Along with this, the extending portion 7b2A of the airtight sheet 7bA extends along the inner surface 3b3 of the beam bottom heat insulation material 3b, passes between the inner surface 3b3 of the beam bottom heat insulation material 3b and the joist 5b3A, bends indoors along the upper surface of the foundation inner heat insulation material 8a, and is sandwiched between the foundation inner heat insulation material 8a and the upper heat insulation material 8c. Although the extending portion 7b2A is not in close contact with the lower end portion of the inner surface 3b3 of the beam bottom heat insulation material 3b in this way, this lower end portion is covered from the inside by a portion that covers the foundation inner heat insulation material 8a from the inside.

[0095] Note that the present invention is not limited to the above embodiments, and for example, the following aspects can also be adopted.

[0096] In the above-described embodiment, the floor base material 6 is exemplified as the first member, and the beam cross-insulation material 7a is exemplified as the second member. However, the first member and the second member are not limited thereto. For example, as described above, when arranging the end portion of the airtight sheet 7b between the in-foundation insulation material 8a or the under-insulation material 8b and the horizontal portion 2a1 of the foundation 2a, the in-foundation insulation material 8a or the under-insulation material 8b can be used as the first member, and the airtight sheet 7b can be fixed to the in-foundation insulation material 8a or the under-insulation material 8b. In this case, after installing the in-foundation insulation material 8a or the under-insulation material 8b on the horizontal portion 2a1, the airtight sheet 7b is unfolded upward.

[0097] In the above-described embodiment, the airtight member 7 has the surplus portion 7b2b, but the surplus portion 7b2b can also be omitted. In this case, an airtight line can be formed by connecting both covering portions 7b2a with an airtight tape or the like in a state where the covering portions 7b2a are arranged side by side in the width direction.

Explanation of Reference Numerals

[0098] 1, 1A Building 2a Foundation 2a1 Horizontal Portion 2a2 Support Portion 2a2b Inner Surface 2b, 2bA Outer Peripheral Beam 3b Beam Under-Insulation Material 4 Inner Wall Base 6 Floor Base Material (An Example of the First Member) 6a Lower Surface (An Example of the First Surface) 7a, 7aA Beam Cross-Insulation Material (An Example of the Second Member) 7a1 Upper Surface (An Example of the Second Surface) 7b, 7bA Airtight Sheet 7b1 Clamped Portion 7b2, 7b2A Extended Portion 7b2a, 7b2A1 Covering Portion 7b2b, 7b2A2 Surplus Portion 8a In-Foundation Insulation Material 9 Fitted Member 10 Interpolation Insulation Material 11 Buffer Material

Claims

1. An airtight component, a first member having a first surface, a second member having a second surface and an orthogonal surface extending in a direction orthogonal to the second surface from the second surface, a sandwiched portion sandwiched between the first surface and the second surface, and an extending portion extending from the sandwiched portion beyond an edge adjacent to the orthogonal surface on the second surface, and an airtight sheet fixed to the second member, The airtight component, wherein the sandwiched portion is formed of a thermoplastic material that can be melted to fill a gap between the first surface and the second surface by applying heat of a predetermined temperature or higher while being sandwiched between the first surface and the second surface.

2. The airtight component according to claim 1, wherein the extending portion has a covering portion having a width dimension capable of covering the entire orthogonal surface in a width direction orthogonal to a third surface orthogonal to the second surface and the orthogonal surface, and an excess portion extending from the covering portion toward one side in the width direction.

3. A building, comprising the airtight component according to claim 1 or 2, and a beam, wherein the first member constitutes a floor base material provided on the beam, the second member constitutes a beam cross-insulation material provided on the indoor side of the beam, the sandwiched portion is sandwiched between the first surface constituting the lower surface of the floor base material and the second surface constituting the upper surface of the beam cross-insulation material, and the extending portion extends from the sandwiched portion beyond an edge adjacent to the indoor side on the upper surface of the beam cross-insulation material.

4. The building further comprises a beam under-insulation material provided under the beam, and the extending portion has a vertical length capable of covering the entire vertical direction of the inner surface facing the indoor side and constituting the orthogonal surface of the beam cross-insulation material, and the entire vertical direction of the inner surface facing the indoor side of the beam under-insulation material, according to claim 3.

5. The building further comprises a foundation provided under the beam and having a support portion for supporting the beam, and an in-foundation insulation material provided along the inner surface facing the indoor side of the support portion, and the extending portion has a vertical length capable of covering the entire vertical direction of the inner surface facing the indoor side and constituting the orthogonal surface of the beam cross-insulation material, and at least a part of the inner surface facing the indoor side of the in-foundation insulation material, according to claim 3.

6. The foundation has a horizontal portion that extends horizontally and has a peripheral portion where the support portion is erected. The building according to claim 5, wherein the extending portion has a vertical length connectable to the horizontal portion.

7. A construction method of a building according to claim 3, wherein a gap between the lower surface of the floor base material and the upper surface of the beam cross-insulation material is filled by applying heat of a predetermined temperature or higher to the clamped portion.

8. Prepare an inner wall base having an internal space, Install a beam bottom insulation material under the beam, After fixing the extending portion in a state of covering the inner surface of the beam cross-insulation material and the inner surface of the beam bottom insulation material, Install an inner wall base at a position on the indoor side of the extending portion. The construction method of a building according to claim 7.

Images