JPH11152871A - Joint structure for outer wall material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the poor appearance of a coating joint, including coating cuts, level differences and recesses, in a joint structure for an outer wall material. SOLUTION: A joint structure has an insertion recess 3 with a preset width at least on the surface side of each outer wall material 1 formed between the joint ends of two outer wall materials 1, 1 and an elastic body 6 provided in the insertion recess 3 to be spaced from the side face of the insertion recess 3. Elastic putty material 9 is filled in a gap between the side face of the insertion recess 3 and the elastic body 6 and on the surface side of the outer wall material 1 for the elastic body 6 in such a manner that the surface on the surface side of the outer wall material 1 is flat with the surfaces of both outer wall materials 1, 1, and coating is applied to the surfaces of both outer wall materials 1, 1 and the putty material 9 to form a coating 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of an outer wall material, and more particularly to a technical field of preventing appearance failure at a joint portion of a coating applied to a surface of an outer wall material.

[0002]

2. Description of the Related Art In general, as a joint structure of an outer wall material, for example, as shown in FIG. 3, a joint portion 32 having a predetermined width formed between joining ends of two outer wall materials 31, 31 is used.
A hat joiner 33 is provided on the back surface side of the outer wall material 31 inside, and a caulking material 34 (or a putty material) such as a silicon-based or urethane-based material is provided on the outer wall material 31 surface side of the joiner 33 in the joint portion 32. Filling so that the surface on the front side is flush with the surfaces of both outer wall materials 31, 31;
It is known that the surfaces of both outer wall materials 31, 31 or the caulking material 34 are coated. Incidentally, in FIG.
Numeral 35 is a coating film formed by painting, and numeral 36 is a rim material as an outer wall base to which each outer wall material 31 is fixed by nails.

[0003] Further, as shown in FIG.
1, 31 are fixed to the body material 36 in a state where their joint ends are abutted with each other, and the joint portions 32 are coated on the surfaces of both outer wall materials 31, 31 without using a caulking material or the like. 35 may be formed.

[0004]

However, in the latter conventional joint structure (FIG. 4), the surface accuracy of the outer wall members 31 and 31 depends on the thickness accuracy of each outer wall member 31 and unevenness of the rim member 36. May not be flush, and a step may occur in the coating film 35 along the joint portion 32. Further, stress concentrates on the coating film 35 on the joint portion 32 due to the movement of each outer wall material 31 and the body edge material 36,
There is a problem that the stretch of the coating film 35 cannot follow the opening of the joint portion 32 and the coating film breaks at the joint portion 32.

On the other hand, in the former joint structure (FIG. 3),
Since the caulking material 34 has elasticity and can follow the movement of each of the outer wall materials 31 and the rim material 36, the coating film is less likely to be cut at the joint portions 32. However, since the so-called thinning phenomenon occurs due to the volatilization of the solvent or the like before the surface of the outer wall material 31 side of the caulking material 34 is hardened after application, the coating film 35 is dented along the joint portion 32. There's a problem. Although the volume change of the caulking material 34 is about 5%, the portion of the caulking material 34 that is in contact with the joining end portions of the outer wall materials 31 and the joiner 33 is harder to move than the outer wall material 31 surface side. In addition, the joints 32 in the width direction central portion on the outer wall material 31 surface side surface are intensively thinned, so that the dents of the coating film 35 become conspicuous.

The present invention has been made in view of the above points, and an object of the present invention is to improve the joint structure of the outer wall material to improve the structure of the outer wall material so that the coating film breaks at the joint of the coating and the step is reduced. In order to prevent appearance defects such as dents and the like from occurring.

[0007]

In order to achieve the above object, according to the present invention, there is provided an insertion recess formed between joining ends of two outer wall materials, and the insertion recess is provided in the insertion recess. An elastic body inserted in a state in which a gap is formed between the elastic body and the side surface of the elastic body, and a gap between the elastic body and the side surface of the insertion recess or the outer wall material surface side of the elastic body, the outer wall material surface side surface Were filled with an elastic putty material so as to be flush with the surfaces of both outer wall materials, and the surfaces of both outer wall materials or the putty material were coated.

More specifically, in the invention of claim 1, the joint structure of the outer wall material is formed between the joining ends of the two outer wall materials, and has a predetermined width at least on the surface side of the outer wall material. An insertion recess, an elastic body inserted into the insertion recess with a gap formed between the insertion recess and a side surface of the insertion recess, and a gap between the side surface of the insertion recess and the elastic body or an outer wall of the elastic body. A putty material which is filled on the material surface side so that the surface on the outer wall material surface side is flush with the surfaces of the two outer wall materials, and the elastic body is bonded to the joining end portions of the both outer wall materials, respectively. It is assumed that the surface of the material or putty has been painted.

Thus, since the elastic body is bonded to the side surface of the insertion recess (the joint end of both outer wall materials) via the elastic putty material, the elastic body expands and contracts following the movement of the outer wall material and the outer wall base. In addition, it is possible to prevent the coating film from breaking at the joint. Also, since the surface of the putty material is flush with the surfaces of both outer wall materials,
No step is formed in the coating film. Further, since the volume of the elastic body does not decrease with the lapse of time, the elastic body is not thinned like a caulking material. On the other hand, the putty material becomes thin, but its thickness can be made considerably smaller than that of the elastic body, so that even if the putty material becomes thin, the dents in the coating film can be made less noticeable. Therefore, it is possible to prevent appearance defects from occurring at joints of the coating.

According to a second aspect of the present invention, in the first aspect, the insertion concave portion and the elastic body are formed to have a substantially rectangular cross section.
It is assumed that an adhesive is provided between the bottom surface of the insertion recess and the back surface of the elastic body.

According to the present invention, the elastic body can be temporarily fixed to the bottom surface of the insertion concave portion before filling the putty material during construction, so that the workability can be improved.
In particular, since it can be temporarily fixed at the center of the insertion recess in the width direction, gaps can be reliably formed on both sides of the elastic body, and the gaps can be filled with the putty material. It can be assured. Further, since the putty material can be prevented from wrapping around the back surface side of the elastic body by the adhesive, the three-sided bonding in which the back surface of the elastic body is bonded to the bottom surface of the insertion recess by the putty material can be prevented. . For this reason, the elastic body is bonded only to both outer wall materials (2
Thus, it is possible to prevent the elongation from being restricted, and it is possible to reliably prevent the coating film from breaking at the joint. Moreover, even if the pressure-sensitive adhesive loses its tackiness due to aging, it does not adhere and fix the elastic body to the bottom surface of the insertion recess by curing. Therefore, it is possible to more reliably prevent the appearance failure of the coating while maintaining good workability.

According to a third aspect of the present invention, in the first or second aspect, the insertion concave portion is provided only on the outer wall material surface side,
The back side of the insertion recess is in a state where the joining end portions of both outer wall materials abut against each other.

By doing so, even if the coating film, elastic body and putty material which are organic at the time of a fire are burned, the outer wall material is made of an inorganic material so that the penetration of the flame into the inside of the wall can be achieved by the abutting portion. Can be prevented. Therefore, the fire protection inside the wall can be improved.

According to the fourth aspect of the present invention, the first, second or third aspect of the present invention is provided.
In the invention of the above, the outer wall material is obtained by integrally laminating a front and back layer composed of mineral fibers, an inorganic powder and a binder, and an intermediate layer composed of an inorganic foam and a binder, and has a specific gravity of the whole. Is 0.6 to 0.9.

[0015] Thus, the specific gravity of the entire outer wall material is reduced to 0.
By setting it to 9 or less, both the front and back layers and the intermediate layer have many voids inside, so that the putty material can penetrate into the voids and improve the adhesion with the elastic body by the anchor effect. In addition, the occurrence of coating film breakage can be effectively suppressed. In addition, nailing is easy, and cracks can be prevented from occurring in the nailed portion. On the other hand, by setting the specific gravity of the entire outer wall material to 0.6 or more, it is possible to appropriately maintain nail holding force such as nail head penetration resistance and nail side surface resistance. Furthermore, since the front and back layers are made of mineral fibers, the nail head can be easily driven until it is flush with the surface of the outer wall material, and cracks are unlikely to occur during the driving, so that the nail head is not noticeable by painting. can do. Therefore,
An outer wall material optimal for the joint structure according to the first, second, or third aspect of the invention can be easily obtained.

[0016]

(Embodiment 1) FIG. 1 shows a joint structure of an outer wall material according to a first embodiment of the present invention. Each is fixed to the member 12 by a nail. A joint 2 is formed between the joining ends of the outer wall materials 1, 1. The joint 2 has a substantially rectangular cross section having a substantially constant width over the entire front and back direction of each outer wall material 1. Are provided. That is, the bottom surface of the insertion concave portion 3 is formed by the fixing surface of the outer wall material 1 of the body edge member 12, and both side surfaces of the insertion concave portion 3 are formed by the joint end surfaces of both outer wall materials 1, 1.

The elastic body 6 is inserted into the insertion recess 3 of the joint 2 with a gap formed between both side surfaces of the insertion recess 3 (joining end surfaces of the outer wall materials 1 and 1). Have been. The elastic body 6 also has a substantially rectangular cross section, and the gap between both sides of the insertion recess 3 and the elastic body 6 is set to about 1 mm. The thickness of the elastic body 6 is set to be about 1 mm smaller than the depth of the insertion recess 3 (the same as the thickness of the outer wall material 1). The elastic body 6 preferably has an elongation of 50% or more. For example, a molded urethane foam having an elongation of 150% is suitable. In addition, a synthetic resin foam such as foamed polyethylene or EPDM (ethylene propylene dimonomer) foam may be used. Further, it may be of the same quality as the putty material 9 described later, but in this case, it is necessary to use a material that has been cured until there is no change in volume.

The gap between the elastic member 6 and both sides of the insertion recess 3 or the surface of the outer wall 1 of the elastic body 6
The putty material 9 having elasticity is filled so that the surface on the front side is flush with the surface of the outer wall materials 1, 1, and the elastic body 6 is attached to the joining end of the outer wall materials 1, 1 by the putty material 9. Each is glued. This putty material 9, like the elastic body 6,
It is desirable that the elongation is 50% or more, and that the adhesive strength (tensile strength) is 2 kgf / cm ² or more.
For example, a urethane-based putty having an elongation of 100% is suitable. In addition, an epoxy resin putty, a synthetic resin emulsion-based putty, and a general caulking material may be used.

An adhesive 7 is provided on the back surface of the elastic body 6. Before the adhesive 7 is bonded to the joint end of each outer wall material 1 by the putty material 9, the elastic material 6 is inserted into the outer wall material of the body edge material 12 which constitutes the bottom surface of the concave portion 3 beforehand. 1 for temporarily fixing to the fixed surface,
For example, a double-sided butyl tape or a double-sided acrylic tape is used.

A coating is applied to the surfaces of the outer wall materials 1, 1 and the putty material 9 to form a coating film 11 having a substantially constant thickness. Examples of the coating paint include soft lysine (manufactured by SK Chemical Co., Ltd.).

Each of the outer wall materials 1 is an inorganic material in which front and back layers 1a, 1a made of mineral fiber, inorganic powder and binder, and an intermediate layer 1b made of inorganic foam and binder are integrated. The specific gravity of the whole is set to 0.6 to 0.9. Specifically, for example, a slurry containing 20 to 80% by weight of mineral fibers, 3 to 15% by weight of organic fibers, 10 to 65% by weight of inorganic powder, and 5 to 30% by weight of a binder Is formed between the front and back layers 1a, 1a made of a wet mat obtained by wet papermaking, 40 to 80% by weight of an inorganic foam, 5 to 30% by weight of an organic fiber, 5 to 30% by weight of a binder and The intermediate layer 1b is formed from a mixture of 40% by weight of an inorganic powder, and the front and back layers 1a, 1a and the intermediate layer 1b are formed.
After heating and pressurizing, and dried with a drier (volcanic glassy composite plate).

Here, an example of a specific method of manufacturing a volcanic glassy composite plate as each of the outer wall materials 1 will be described. First, 50% by weight of rock wool (mineral fiber)
5% by weight of pulp (organic fiber), 30% by weight of aluminum hydroxide (inorganic powder), 10% by weight of powdered phenol (binder) and 5% by weight of starch (binder) Was poured into clear water and stirred to form an aqueous slurry having a concentration of 2%.
The wet mat to be the front and back layers 1a, 1a is prepared.

On the other hand, 65% by weight of shirasu foam (inorganic foam), 5% by weight of pulp (organic fiber) and 5% by weight
Heat-fused fibers (organic fibers), 10% by weight of acrylic resin (binder), 5% by weight of starch (binder),
0% by weight of aluminum hydroxide (inorganic powder) is mixed under a spray of water having a solid content of 30 to 100 to prepare a mixture for the intermediate layer 1b.

The mixture for the intermediate layer 1b is evenly spread and deposited on the wet mat (back layer 1a) so as to have a thickness of 33 mm, and the wet mat to be the surface layer 1a is disposed thereon. Then, a laminate having an overall thickness of 47 mm is produced. Next, this laminate was heated at a temperature of 200 ° C. and a pressure of 10 k.
gf / cm ² to form a plate having a thickness of 12 mm, and then drying the plate in a drier having a temperature of 200 ° C. for 30 minutes to obtain a front and back layer having a specific gravity of about 0.95. By laminating and laminating 1a, 1a and the intermediate layer 1b having a specific gravity of about 0.5, a three-layer volcanic glassy composite plate having an overall specific gravity of about 0.7 is obtained.

The procedure for obtaining the joint structure is as follows. First, one outer wall member 1 is fixed to the rim member 12 by nailing, and then about 1 mm to the joint end face of the fixed outer wall member 1. The elastic body 6 is temporarily fixed to the rim member 12 via the adhesive 7 so as to leave a gap. That is, the elastic body 6 is temporarily fixed before the insertion recess 3 is formed. Next, the other outer wall material 1 is nailed and fixed to the body edge material 12 so that a gap of about 1 mm is formed between the joint end surface and the elastic body 6. After the outer wall materials 1 and 1 are fixed to the frame member 12 such that the distance between the joining end surfaces thereof is about 2 mm larger than the width of the elastic body 6, the insertion recess 3 is formed. Alternatively, the elastic body 6 may be temporarily fixed.

Subsequently, both sides of the insertion recess 3 and the elastic body 6
An elastic putty material 9 is filled into the gap between the elastic members 6 or the surface of the outer wall material 1 so that the surface on the surface side of the outer wall material 1 is flush with the surfaces of the outer wall materials 1 and 1. The surface of the materials 1, 1 to the putty material 9 is coated to form a coating film 11.

Therefore, in the first embodiment, the joint portion 2 formed between the joining ends of the two outer wall materials 1 and 1 is provided.
The elastic body 6 is adhered to the joining end portion of the outer wall materials 1 and 1 via the elastic putty material 9 in the insertion concave portion 3. Since the film 11 expands and contracts following the movement, the coating film 11 does not break at the joint portion 2. Further, since the surface of the putty material 9 is flush with the surfaces of the outer wall materials 1 and 1, no step is formed on the coating film 11. Further, since the volume of the elastic body 6 does not decrease due to a change with the passage of time, the elastic body 6 does not become thin like a caulking material. On the other hand, the putty material 9 becomes thin, but the thickness of the putty material 9 is about 1 mm.
Dents can be made less noticeable. Therefore, it is possible to prevent the appearance defect from occurring at the joint 2 of the coating with a simple configuration.

Further, since the adhesive 7 is provided on the back surface of the elastic body 6, before filling the putty material 9 at the time of construction, the elastic body 6 is moved to the joint portion 2 width on the fixing surface of the outer wall material 1 of the body edge material 12. Can be temporarily fixed at the center in the direction, and the workability can be improved, and a gap can be secured on both sides of the elastic body 6 to reliably fill the gap with the putty material 9. The body 6 can be securely bonded to the joining end portions of the outer wall materials 1 and 1. Since the putty material 9 can be suppressed from going around the back surface of the elastic body 6 by the adhesive 7, it is possible to prevent the elastic body 6 from being bonded to the body edge material 12, thereby preventing three-sided adhesion. . For this reason, the two-sided adhesion that the elastic body 6 is adhered only to both the outer wall materials 1 and 1 can be secured, so that the extension of the elastic body 6 is not limited by the three-sided adhesion, and 11 is the joint 2
Can be reliably prevented from being cut. Moreover, even if the pressure-sensitive adhesive 7 loses its tackiness due to aging, the elastic body 6 is not bonded and fixed to the body member 12 by curing. Therefore, it is possible to more effectively prevent the occurrence of poor appearance of the coating while maintaining good workability.

Further, each outer wall material 1 is obtained by laminating and integrating front and back layers 1a, 1a made of mineral fiber, inorganic powder and binder, and an intermediate layer 1b made of inorganic foam and binder. Since the overall specific gravity is 0.6 to 0.9, the front and back layers 1a, 1a and the intermediate layer 1 have a low specific gravity.
b both have many voids inside, and the putty material 9 can penetrate into the voids to improve the adhesion to the elastic body 6 by the anchor effect, effectively preventing the occurrence of coating film breakage. Can be prevented. In addition, nailing is easy, and cracks can be prevented from occurring at the nailed portion. On the other hand, nail holding forces such as nail head penetration resistance and nail side resistance can be favorably maintained by setting the specific gravity to 0.6 or more. Further, since the front and back layers 1a, 1a are made of mineral fibers, the nail head can be easily driven until it is flush with the surface of each outer wall material 1, and cracks hardly occur during the driving. For this reason, the nail head can be made inconspicuous by coating each outer wall material 1. Therefore, each of the outer wall materials 1 can be optimized for the joint structure of the present invention.

In the first embodiment, a hat joiner is not used unlike the conventional joint structure (see FIG. 3). However, a hat joiner is provided on the back side of the outer wall material 1 in the insertion recess 3 of the joint 2. Alternatively, the bottom surface of the insertion recess 3 may be configured by the surface of the joiner on the outer wall material 1 surface side.

(Embodiment 2) FIG. 2 shows Embodiment 2 of the present invention.
(Note that, in the following embodiments, the same portions as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted.)
This embodiment is different from the first embodiment in that the insertion recess 3 of the joint 2 formed between the joining ends of the outer wall materials 1 and 1 is different from that of the first embodiment.

That is, in this embodiment, the insertion concave portion 3 having a substantially rectangular cross section is provided only on the surface side of the outer wall material 1 of the joint portion 2, and the rear surface side of the insertion concave portion 3 is a joint end of the outer wall materials 1 and 1. The parts are in a state of being butted against each other. For this reason, the bottom surface and both side surfaces of the insertion concave portion 3 are both outer wall materials 1, 1
The elastic body 6 is made of an outer wall material 1, 1 by an adhesive 7 provided between the bottom surface of the insertion recess 3 and the back surface of the elastic body 6.
Is temporarily fixed to the side surface of the outer wall material 1 at the abutting portion.

The portion near the surface of the outer wall material 1 of the insertion recess 3 is:
The inclined surfaces 4 and 4 are gently inclined toward the front side toward the opposite side of the center of the insertion concave portion 3 in the width direction. A putty material 9 is provided on each of the inclined surfaces 4 so that the surface of the putty material 9 is flush with the surface of each outer wall material 1.
The gap between both sides of the insertion recess 3 and the elastic body 6 is set to about 1 mm, respectively, as in the first embodiment, and the thickness of the elastic body 6 is about 1 m more than the depth of the insertion recess 3.
m is set smaller.

An elastic waterproof packing 13 made of EPDM foam or the like is interposed between the outer wall materials 1 and 1 and the body edge material 12 to maintain the watertightness of the inside of the wall.

Therefore, in the second embodiment, the back side of the insertion recess 3 is in a state where the joining end portions of the two outer wall materials 1 and 1 made of an inorganic material abut against each other. Even if a certain coating film 11, elastic body 6 and putty material 9 burn, the butting portion of both outer wall materials 1 and 1 can prevent the flame from penetrating inside the wall. Therefore, the fire protection inside the wall can be improved with a simple configuration.

For example, when the width of the elastic body 6 is 6 mm and the thickness is 3 mm, when the nail SFN50 is driven at a pitch of 150 mm at a position 12 mm from the end face of each outer wall material 1, the joint 2 moves. Can be reduced, and the breakage of the coating film can be more reliably prevented.

In the second embodiment, the inclined surfaces 4, 4 are provided in the vicinity of the surface of the outer wall material 1 of the insertion concave portion 3, but both side surfaces of the insertion concave portion 3 are not provided without the inclined surfaces 4, 4. You may make it extend straight to the surface of the material 1. Instead of providing each inclined surface 4, a small chamfer may be provided at a corner between each side surface of the insertion recess 3 and the surface of each outer wall material 1.

In each of the above embodiments, the insertion recess 3 and the elastic body 6 of the joint 2 are formed to have a substantially rectangular cross section, but the width of the insertion recess 3 and the elastic body 6 is increased toward the surface of the outer wall material 1. It may be formed in a triangular cross section (V joint) so as to increase the size. Further, also in this case, the insertion recess 3 may be provided over the entire front and back direction of the outer wall material 1 or may be provided only on the surface side of the outer wall material 1.

[0039]

As described above, according to the first aspect of the present invention, the joint structure of the outer wall material is formed between the joining ends of the two outer wall materials, and is provided at least on the surface side of the outer wall material. And a resilient member inserted in the insertion recess with a gap formed between the insertion recess and the side surface of the insertion recess, and a gap between the side surface of the insertion recess and the elastic body. Alternatively, an elastic putty material is filled on the outer wall material surface side of the elastic body such that the surface on the outer wall material surface side is flush with the surfaces of both outer wall materials, and the surfaces of both outer wall materials or the putty material are coated. By doing so, it is possible to prevent the appearance defect from occurring at the joints of the coating.

According to the second aspect of the present invention, the insertion recess and the elastic body are formed to have a substantially rectangular cross section, and the adhesive is provided between the bottom surface of the insertion recess and the back surface of the elastic body, thereby improving workability. It is possible to more reliably prevent the appearance failure of the coating while maintaining the good condition.

According to the third aspect of the present invention, the insertion recess is provided only on the surface of the outer wall material, and the back surface of the insertion recess is in a state where the joining ends of the two outer wall materials abut against each other. It is possible to improve fire protection.

According to the fourth aspect of the present invention, the outer wall is formed by laminating and integrating the front and back layers composed of mineral fibers, inorganic powder and binder, and the intermediate layer composed of inorganic foam and binder. By setting the specific gravity of the whole to 0.6 to 0.9, it is possible to optimize the outer wall material with respect to the joint structure of the first, second or third aspect of the present invention.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joint showing a joint structure of an outer wall material according to a first embodiment of the present invention.

FIG. 2 is a diagram corresponding to FIG. 1 showing a second embodiment.

FIG. 3 is a sectional view of a joint portion showing an example of a joint structure of a conventional outer wall material.

FIG. 4 is a diagram corresponding to FIG. 3, showing another example of a joint structure of a conventional outer wall material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer wall material 2 Joint part 3 Insertion concave part 6 Elastic body 7 Adhesive 9 Putty material 11 Paint film

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuyuki Komatsubara, Inventor 2-3-18 Nakanoshima, Kita-ku, Osaka, Osaka Inside Daiken Kogyo Co., Ltd. (72) Inventor Kiyoshi Mimura 2-3-3, Nakanoshima, Kita-ku, Osaka, Osaka No. 18 Daiken Kogyo Co., Ltd. (72) Hitoshi Nishino 2-318 Nakanoshima, Kita-ku, Osaka City, Osaka Pref. Daiken Kogyo Co., Ltd. (72) Inventor Akihisa Higashi 2 Nakanoshima, Kita-ku, Osaka City, Osaka 3-18 Chome Daiken Kogyo Co., Ltd.

Claims (4)

[Claims] 1. An insertion recess formed between joining ends of two outer wall materials and having a predetermined width at least on a surface side of the outer wall material, and a side surface of the insertion recess inside the insertion recess. An elastic body inserted with a gap formed therebetween, and a side surface of the insertion recess and a gap between the elastic bodies or an outer wall material surface side of the elastic body, the outer wall material surface side being a surface of both outer wall materials. And a putty material having elasticity for adhering the elastic body to the joining ends of the outer wall materials, respectively, wherein the surfaces of the outer wall materials or the putty material are coated. Joint structure of exterior wall material characterized by the following. 2. The insertion recess according to claim 1, wherein the insertion recess and the elastic body are formed in a substantially rectangular cross section, and an adhesive is provided between a bottom surface of the insertion recess and the back surface of the elastic body. Joint structure of exterior wall material. 3. The insertion recess is provided only on the surface side of the outer wall material, and the back side of the insertion recess is in a state where the joining ends of both outer wall materials abut against each other.
Or the joint structure of the outer wall material according to 2. 4. The outer wall material is obtained by integrally laminating a front and back layer composed of a mineral fiber, an inorganic powder and a binder, and an intermediate layer composed of an inorganic foam and a binder. A specific gravity of 0.6 to 0.9, wherein the specific gravity is 0.6 to 0.9.
The joint structure of the outer wall material according to 2 or 3.