JP2000136613A - Wall material seam structure and building - Google Patents

Abstract

(57) [Summary] [Problem] To provide a wall material seam structure that does not cause cracks by facilitating the construction of a seam even if the width of a groove such as a grooved outer wall is narrow, and a building. is there. SOLUTION: Adjacent wall materials 1, 1 are attached with a gap S provided along a seam thereof, and a seam treatment material 3 having elasticity is sandwiched in the gap S of the seam, and a surface of the seam treatment material 3 is provided. Joint-reinforcement coating film 4 covering both ends of the wall material 1 is formed so as to cover the joint material.
Is a joint structure of the wall material 1 whose surface is covered with the exterior coating layer 5, and the joint treatment material 3 and the joint reinforcing coating film 4
It is characterized by being non-adhesive to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between adjacent wall materials such as a building and a building provided with the joint structure.

[0002]

2. Description of the Related Art A method of constructing a wall surface of a building by continuously connecting a plurality of wall materials such as a plurality of wall panels has been widely practiced. In this method, a joint gap is provided at the seam of the wall material and the joint is attached to the structure of the building, and the surface of the wall material is also painted and jointly finished including the joint gap. However, the distance between joints changes due to the expansion and contraction of wall materials due to the passage of time, cracks occur in the coating of this part, and in severe cases, the coating film falls off, etc., and the durability and aesthetics of the building Is a problem.

[0003] As a method for solving the above-mentioned problem, for example, a seamless coating method on a wall surface described in JP-A-4-254652 is known. The ones described in the above-mentioned publications cover elastic joints with a single-sided release tape to cover the joints,
An elastic joint reinforcing film is coated thereon, and the surface of the wall material including the joint reinforcing film is overcoated. Due to the releasability of the elastic tape on one side, it is possible to slide between the elastic tape and the joint reinforcing coating, and even if the wall joint expands and contracts due to expansion and contraction of the wall material, the elastic tape is wider than the width of the joint. It is sufficient that the joint reinforcing film in the range expands and contracts only by the expansion and contraction dimension of the joint, and no crack is generated in the seam coating film and joint reinforcing film.

[0004]

However, the wall material seam structure according to the seamless coating method described in the above-mentioned publication has a problem that the grooved outer wall having a groove formed on the outer wall surface of the seam portion has an elasticity when the width of the groove is small. Since the width of the tape and the joint reinforcing coating film is also reduced, there is a problem that it is difficult to perform seamless coating.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to facilitate the construction of a seam even when a wall material having a narrow groove, such as a grooved outer wall, is used. There is no wall material seam structure and building to provide.

[0006]

According to a first aspect of the present invention, an adjoining wall material is attached with a gap provided along a seam thereof, and an elastic seam treatment material is inserted into the gap of the seam. In rare cases, a joint-reinforcement coating film that covers the surface of the seam treatment material is formed across both edges of the wall material, and the joint-reinforcement coating film and the wall material are covered with an exterior coating layer. The joint structure is characterized in that the joint treatment material and the joint reinforcing coating film are non-adhesive to each other.

According to a second aspect of the present invention, the adjacent wall material is attached with a gap provided along the seam, the seam treatment material is formed in a substantially T shape, and the T-shaped vertical piece is formed by the seam gap. And a T-shaped plate is attached across the two edges of the wall material adjacent to the seam, and a joint reinforcing coating covering the surface of the plate is straddled between the two edges of the wall material. The joint material has a joint structure in which the surface of the joint reinforcement coating film and the wall material is covered with an exterior coating film layer, and the joint treatment material and the joint reinforcement film are non-adhesive to each other. It is characterized by:

According to a third aspect of the present invention, a plate-like seam treatment material having a plurality of needle-like protrusions attached to adjacent wall materials with a gap provided along the seam thereof, A joint-reinforcement coating that is attached across both edge portions of the adjacent wall material and that covers the surface of the seam treatment material is formed across the two edge portions of the wall material. The wall material has a seam structure in which the surface of the material is covered with an exterior coating film layer, and the seam treatment material and the joint reinforcement coating film are non-adhesive to each other.

According to a fourth aspect of the present invention, an adjacent wall material is attached with a gap provided along a seam thereof, and the hardening is progressing in the gap of the seam and the hardening is completed after filling. A seam treatment material made of an elastic sealing agent is filled, and a joint reinforcement coating covering the surface of the seam treatment material is formed straddling between both edge portions of the wall material. A wall material seam structure covered with an exterior coating layer, wherein the seam treatment material and the joint reinforcing coating film are non-adhesive to each other.

According to a fifth aspect of the present invention, in the joint structure for a wall material according to any one of the first to fourth aspects, at least the surface of the joint treatment material is formed of a silicone resin or silicone rubber, and the joint is reinforced. The coating film and the exterior coating film layer are formed of an elastic acrylic paint.

According to a sixth aspect of the present invention, there is provided a building having the wall material joint structure according to any one of the first to fifth aspects.

(Function) According to the first aspect of the present invention, a joint reinforcing material is sandwiched between gaps of a seam, and a joint-reinforcement coating film covering the surface of the seam processing material is provided between both edge portions of the wall material. Since it is only formed by straddling, the seam can be easily constructed even if the width of the groove is narrow, such as the grooved outer wall. Further, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the elastic seam treatment material, and no crack is generated at the seam.

According to the second aspect of the present invention, when the vertical piece of the seam treatment material is inserted into the gap of the seam, the plate piece is attached across the both edges of the wall material adjacent to the seam, so that the groove is provided. Even if it is a wall material with a narrow groove such as a carved outer wall,
Seam construction is easy. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to a third aspect of the present invention, a plate-shaped joint processing material having a large number of needle-like projections on an attachment surface is attached across the both edges of a wall material adjacent to the joint, and the joint processing is performed. Since the joint reinforcement coating that covers the surface of the wall material is formed only across the both edges of the wall material, even if the wall material has a narrow groove such as a grooved outer wall, the seam of the seam Construction is easy. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to a fourth aspect of the present invention, a seam treatment material made of a string-like elastic sealing agent is filled in the gap of the seam, which is in the process of hardening and hardening is completed after filling, and the surface of the seam treatment material is filled. Since the joint reinforcement reinforcing film to be covered is formed only over the both edges of the wall material, the seam can be easily constructed even if the width of the groove such as the outer wall of the groove is small. is there. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to the fifth aspect of the present invention, since at least the surface of the joint treatment material is formed of a silicone resin or silicone rubber, the joint treatment material has good sliding with the joint reinforcing coating film, and stress relaxation is further improved. Since the joint reinforcing coating film and the exterior coating film layer are formed of an elastic acrylic paint, cracks do not occur at the joints.

According to a sixth aspect of the present invention, there is provided a building having the wall material joint structure according to any one of the first to fifth aspects.
No cracks occur at the seam of the wall material.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment of the present invention and is a sectional view of a wall material joint structure. In FIG.
Reference numeral 1 denotes a wall material, and the wall material 1 is used as an outer wall material of a building, and a corner at an edge is cut off. A plurality of the wall materials 1 are arranged in parallel along the outer periphery of a building (not shown). As shown in FIG. Pier 2
Attached to.

The joint structure of the wall materials 1 and 1 of this embodiment is as follows.
It is formed by seamless painting and has the following configuration. In the gap S of the seam, a seam treatment material 3 having elasticity is sandwiched along the edge of the wall material 1. The joint processing material 3 is a long body having a rectangular cross section and is a molded product formed of a silicone resin, but may be formed of silicone rubber, polypropylene, or the like. Since the joint processing material 3 is a molded product formed of a silicone resin, it is non-adhesive to a joint reinforcing coating film 4 formed of an acrylic paint described later. The width a of the joint processing material 3 is 4 to 8 mm, and the height h is 8 to 12 mm.

The joint reinforcing material 4 is formed so as to cover the surface of the seam treatment material 3 and to extend between both edge portions of the wall materials 1 and 1. This joint reinforcing coating film 4 is formed of an elastic acrylic paint, and its coating amount is 500 to 10
00 g / m ² . Then, the surfaces of the joint reinforcing coating film 4 and the wall materials 1 and 1 are covered with an exterior coating film layer 5 formed of an elastic acrylic paint. The exterior coating layer 5 has a coating amount of 400 to 700 g / m ² and is a flat spray. On the flat spray, stucco coating, lysine coating, ball blowing coating, multi-color coating, etc. can be selected depending on the pattern.

In the construction method of the seam structure of the wall materials 1 and 1 having the above-described structure, the wall materials 1 and 1 are attached to the wooden bar 2 with a gap S provided in the first step. Insert 3. Then, after forming the joint reinforcement coating film 4 by painting, the exterior coating film layer 5 is flat-blown coated thereon,
Depending on the design, stucco coating, lysine coating, etc. can be used for seamless painting.

(Operation of the Embodiment) The wall materials 1 and 1 of this embodiment
In the joint structure of (1), the joint processing material 3 having elasticity is sandwiched in the gap S of the joint, and the joint reinforcing film 4 covering the surface of the joint processing material 3 is straddled between both end edges of the wall materials 1 and 1. Therefore, the seam can be easily formed even with the wall materials 1 and 1 having a narrow width of the groove such as the grooved outer wall.
Further, since the seam treatment material 3 and the joint reinforcing coating film 4 are non-adhesive to each other, stress generated by expansion and contraction of the wall material 1 is reduced at the width a of the seam treatment material 3 having elasticity, and cracks are formed in the seam. Does not occur.

FIG. 2 shows another embodiment of the present invention.
(A) is a cross-sectional view of a wall material joint structure, and (B) is a perspective view of a joint treatment material. In this embodiment, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.
The different components will be described with different reference numerals.

In FIG. 2, reference numeral 1A denotes a wall material, and this wall material 1A is used as an outer wall material of a building, and is formed with a stepped notched groove at an edge. The wall material 1A is a building (the whole is not shown) as in the above embodiment.
Are arranged side by side along the outer periphery of the wall, and as shown in FIG.
Is attached to the wooden bar 2.

The joint structure of the wall materials 1A, 1A of the present embodiment is formed by seamless painting, and has the following structure. The joint processing material 3A is shown in FIG.
(B) As shown in the figure, a long plate piece 3 having a width a of 4 to 8 mm
1A and a vertical piece 32A provided along the center line in the longitudinal direction on the back side of the plate piece 31A. That is, it is a long object having a “T” -shaped cross section in a plane perpendicular to the longitudinal direction. The seam treatment material 3A is coated with a silicone paint and is non-adhesive to a joint reinforcing coating film 4 formed of an acrylic paint described later.

The vertical piece 32A of the joint processing material 3A is:
The plate piece 3 is inserted into the gap S between the joints of the wall materials 1A and 1A.
1A is attached so as to straddle between both end edges of the wall materials 1A and 1A adjacent to the joint. The joint reinforcing film 4 is formed so as to cover the surface of the plate piece 31A so as to straddle between both edge portions of the wall materials 1A and 1A. It is covered with the coating layer 5. The joint reinforcing coating film 4 is formed of an elastic acrylic paint, and its applied amount is 500 to 1000 g / m ² . Further, the exterior coating layer 5 is sprayed with an elastic acrylic paint in a flat manner, and its coating amount is 400 to 700 g / m ² . On the flat spray, stucco coating, lysine coating, ball blowing coating, multi-color coating, etc. can be selected depending on the pattern.

The method of constructing the seam structure of the wall materials 1A, 1A having the above structure is as follows.
A is attached to the wooden bar 2 with a gap S provided therein, and the vertical piece 32A of the joint processing material 3A is inserted into the gap S. Next, after the joint reinforcing coating film 4 is formed by coating, the exterior coating film layer 5 is flat-blown coated thereon, and stucco coating is performed according to the pattern.
Make a seamless paint finish with a paint such as ricin paint.

(Operation of the Embodiment) The wall material 1A of this embodiment
The seam structure of 1A is a vertical piece 32A of seam treatment material 3A.
Is inserted into the gap S of the seam, the plate 31A is attached across both edges of the wall material 1A adjacent to the seam, so that the wall material 1A having a narrow groove such as a grooved outer wall is formed. Even so, seam construction is easy. Further, since the joint processing material 3A and the joint reinforcing coating film 4 are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material 1A is reduced at the width a of the joint processing material 3A, and no crack is generated at the joint.

FIG. 3 shows another embodiment of the present invention.
(A) is a cross-sectional view of the wall material seam structure, and (B) is a perspective view showing an attached state of the seam processing material. In the present embodiment, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof will be omitted, and different components will be described with different reference numerals.

In FIG. 3, reference numeral 1B denotes a wall material. The wall material 1B is used as an outer wall material of a building, and has a stepped notched groove at an edge. The wall material 1B is a building (the whole is not shown) as in the above embodiment.
A plurality of sheets are arranged in parallel along the outer periphery of the adjacent wall material 1B,
1B is attached to the wooden bar 2 with a gap along the seam.

The joint structure of the wall materials 1B, 1B of the present embodiment is formed by seamless painting, and has the following structure. The joint processing material 3B is shown in FIG.
(B) As shown in FIG.
B is a long plate-shaped metal fitting which is punched with B, and a nail 6 spans between both end edges of the wall materials 1B and 1B adjacent to the joint.
Installed with. The pitch of the nail 6 is about 100mm
It has been made. The seam treatment material 3B is pressed by the nail 6, and the wall material 1B is fixed to the wooden bar 2 while preventing the wall material 1B from being displaced by the needle-like projections 31B.

Then, the joint reinforcing material 4B made of an elastic acrylic paint is coated so as to cover the surface of the joint treatment material 3B.
However, it is formed so as to straddle between both edge portions of the wall materials 1B and 1B. The coating amount is 500 to 1000 g / m ² . Further, the surfaces of the joint reinforcing coating film 4 and the wall material 1B are covered with an exterior coating film layer 5 which is sprayed flat with an elastic acrylic paint. The coating amount is 400 to 700 g / m ² . Depending on the pattern, stucco painting, ricin painting,
Ball-blowing coating, colorful coating, etc. can be selected.

Non-adhesive silicone or the like is applied to the surface of the joint processing material 3B, and the joint processing material 3B and the joint reinforcing coating film 4 are made non-adhesive to each other.

The method of constructing the seam structure of the wall materials 1B, 1B having the above-described structure is as follows.
B is attached to the wooden bar 2 with a gap provided, and the seam treatment material 3B is attached to the step at the edge by nailing. Next, after the joint reinforcing coating film 4 is formed by coating, the exterior coating film layer 5 is flat-blown coated thereon, and a seamless coating finish such as stucco coating or lysine coating is applied depending on the pattern.

(Operation of the Embodiment) The wall material 1B of this embodiment
The joint structure of 1B has a large number of needle-like projections 31B on the mounting surface.
Is attached across the both edges of the wall materials 1B and 1B adjacent to the seam, and the joint reinforcing film 4 covering the surface of the seam treatment material 3B is attached to the wall material 1B. 1B, it is only formed so as to straddle between both edge portions, so that even when the wall material 1B having a narrow groove such as a grooved outer wall is narrow, the seam can be easily constructed. Further, since the joint treatment material 3B and the joint reinforcing coating film 4 are mutually non-adhesive,
Stress generated by expansion and contraction of the wall material 1B is reduced by the width of the joint processing material 3B, and no crack is generated at the joint. Furthermore, in fixing the wall material 1B to the wooden crosspiece 2, a fixing means different from the seam treatment material 3B can be omitted.

FIG. 4 shows another embodiment of the present invention, and is a sectional view of a wall material joint structure. In the present embodiment, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof will be omitted, and different components will be described with different reference numerals.

In FIG. 4, reference numeral 1C denotes a wall material, and this wall material 1C is used as an outer wall material of a building, and is formed with a stepped notched groove at an edge. The wall material 1C is a building (the whole is not shown) as in the above embodiment.
As shown in FIG. 4, a plurality of adjacent wall materials 1C and 1C are attached to the wooden bar 2 with a gap provided along the seam as shown in FIG.

The joint structure of the wall materials 1C and 1C of the present embodiment is formed by seamless painting, and has the following structure. The seam treatment material 3C has a curing process in progress before filling and is incomplete, and after filling, is moisture-cured with the passage of time due to moisture in the air and the like, and the string-like silicone resin-based elastic sealing agent (curing) is completed. For example,
Shin-Etsu Polymer Co., Ltd. product name "Polymer Ace"). This string-shaped silicone resin-based elastic sealing agent
In a state where the curing is not completed, it is non-adhesive and has no stickiness, so that a masking tape or the like is not required at the time of construction. The seam treatment material 3C may be a fluororesin type, an acrylic silicone type, or the like in addition to the silicone resin type.

The seam treatment material 3C is made of the wall material 1C, 1
C is filled in the gap of the seam. Then, the joint reinforcing film 4 covering the surface of the seam treatment material 3C is formed by the wall material 1C,
It is formed so as to straddle between both end portions of 1C. The coating amount is 500 to 1000 g / m ² . Further, the surfaces of the joint reinforcing coating film 4 and the wall material 1B are covered with an exterior coating film layer 5 which is sprayed flat with an elastic acrylic paint. The coating amount is 400 to 700 g / m ² . On the flat spray, stucco coating, lysine coating, ball blowing coating, multi-color coating, etc. can be selected depending on the pattern.

Since the seam treatment material 3C has non-adhesion, the seam treatment material 3C and the joint reinforcing coating film 4 are mutually non-adhesive.

The construction method of the seam structure of the wall materials 1C, 1C having the above-described structure is as follows.
C is attached to the wooden bar 2 with a gap provided, and the seam treatment material 3C is inserted into the gap. At this time, a masking tape or the like is unnecessary. Next, after the joint reinforcing coating film 4 is formed by coating, the exterior coating film layer 5 is flat-blown coated thereon, and a seamless coating finish such as stucco coating or lysine coating is applied depending on the pattern.

(Operation of Embodiment) The wall material 1C of this embodiment
The joint structure of 1C is filled with a seam treatment material 3C made of a string-shaped elastic sealing agent which is cured in the gap of the seam in the course of hardening and hardened after filling, and covers the surface of the seam treatment material 3C. Since the membrane 4 is only formed so as to straddle between both edge portions of the wall material 1C, even when the wall material 1C having a narrow groove such as a grooved outer wall is narrow, the seam can be easily formed. . Further, since the joint processing material 3C and the joint reinforcing coating film 4 are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material 1C is reduced by the width of the joint processing material 3C, and no crack is generated at the joint. Furthermore, seam treatment material 3C
Filling is not required with a masking tape or the like, so that the construction is further facilitated.

[0043]

According to the first aspect of the present invention, an elastic seam treatment material is sandwiched in a gap between seams, and a joint reinforcement coating film covering the surface of the seam treatment material is straddled between both edge portions of the wall material. Since it is only formed by bending, the seam can be easily formed even if the width of the groove, such as the grooved outer wall, is small. Further, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the elastic seam treatment material, and no crack is generated at the seam.

According to the second aspect of the present invention, when the vertical piece of the seam treatment material is inserted into the gap of the seam, the plate piece is attached across the both edges of the wall material adjacent to the seam. Even if it is a wall material with a narrow groove such as a carved outer wall,
Seam construction is easy. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to a third aspect of the present invention, a plate-like joint processing material having a large number of needle-like projections is attached to a mounting surface so as to extend between both end portions of a wall member adjacent to the joint. Since the joint reinforcement coating that covers the surface of the wall material is formed only across the both edges of the wall material, even if the wall material has a narrow groove such as a grooved outer wall, the seam of the seam Construction is easy. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to a fourth aspect of the present invention, a seam treatment material made of a string-shaped elastic sealing agent is filled into the gap of the seam, which is in the course of hardening and hardening is completed after filling, and the surface of the seam treatment material is filled. Since the joint reinforcement reinforcing film to be covered is formed only over the both edges of the wall material, the seam can be easily constructed even if the width of the groove such as the outer wall of the groove is small. is there. In addition, since the seam treatment material and the joint reinforcing coating film are non-adhesive to each other, the stress caused by the expansion and contraction of the wall material is reduced by the width of the seam treatment material, and no crack is generated at the seam.

According to a fifth aspect of the present invention, at least the surface of the joint treatment material is formed of a silicone resin or silicone rubber, so that the joint treatment material has good slippage with the joint reinforcing coating film, and stress relaxation is further improved. Since the joint reinforcing coating film and the exterior coating film layer are formed of an elastic acrylic paint, cracks do not occur at the joints.

According to the sixth aspect of the present invention, the building has the wall material joint structure according to any one of the first to fifth aspects.
No cracks occur at the seam of the wall material.

[Brief description of the drawings]

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

FIGS. 2A and 2B show another embodiment of the present invention, wherein FIG. 2A is a cross-sectional view of a wall material joint structure, and FIG.

FIGS. 3A and 3B show another embodiment of the present invention, wherein FIG. 3A is a cross-sectional view of a wall material joint structure, and FIG. 3B is a perspective view showing an attached state of a joint material.

FIG. 4 is a cross-sectional view of a wall material joint structure according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C Wall material 2 Wooden bar 3, 3A, 3B, 3C Seam treatment material 31A Plate piece 32A Vertical piece 4 Joint reinforcement coating film 5 Exterior coating film layer S Gap

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2E001 DH39 FA04 FA52 FA53 FA67 GA56 GA59 GA62 GA63 HD11 KA05 LA09 LA12 PA03 2E110 AA41 AA48 AB04 AB22 BA12 BB05 BD16 BD23 BD26 CA07 CC02 CC20 DA03 DA09 DA10 DC03 DC15 DD03 DD08 GA14Z GA22Z GA33Z GA33Y GA33Z GA44Z GB43Z GB44Z GB46Z GB53Z GB55Z GB62Y

Claims (6)

[Claims] 1. A joint reinforcing film for covering an adjoining wall material with a gap provided along a seam thereof, wherein an elastic seam treatment material is sandwiched in the gap of the seam, and covers a surface of the seam treatment material. Is formed straddling both edges of the wall material, and the joint material has a joint reinforcement coating and a wall material joint structure in which the surface of the wall material is covered with an exterior coating layer. A seam structure for a wall material, wherein the film and the membrane are non-adhesive to each other. 2. An adjacent wall material is attached with a gap along the seam, a seam treatment material is formed in a substantially T shape, and a vertical portion of the T is inserted into the gap between the seams.
A piece of a letter is attached across both edges of the wall material adjacent to the seam, and a joint reinforcing coating covering the surface of the plate is formed across both edges of the wall material, The joint material has a joint structure in which the surface of the joint reinforcing film and the surface of the wall material are covered with an exterior coat layer, and the joint treatment material and the joint reinforcing film are non-adhesive to each other. Wall material seam structure. 3. An adjoining wall material is attached with a gap along its joint, and a plate-like joint treatment material having a large number of needle-like protrusions on an attachment surface is provided at both ends of the wall material adjacent to the joint. A joint reinforcement coating that covers the surface of the seam treatment material is installed straddling both ends of the wall material, and the joint reinforcement coating and the surface of the wall material are exterior coatings. A wall material seam structure covered with a layer, wherein the seam treatment material and the joint reinforcement coating film are non-adhesive to each other. 4. A seam made of a string-like elastic sealing agent, wherein adjacent wall materials are attached with a gap along the seam and curing is in progress in the gap of the seam and hardening is completed after filling. Filled with the treatment material, a joint reinforcement coating covering the surface of the joint treatment material is formed across the both edges of the wall material, and the joint reinforcement coating and the surface of the wall material are covered with an exterior coating layer A wall material seam structure, wherein the seam treatment material and the joint reinforcement coating film are non-adhesive to each other. 5. At least the surface of the seam treatment material,
The wall material joint structure according to any one of claims 1 to 4, wherein the joint material reinforcing coating film and the exterior coating film layer are formed of a silicone resin or a silicone rubber, and the joint coating film layer is formed of an elastic acrylic paint. 6. A building comprising the wall material joint structure according to claim 1. Description: