Waterproof structure of balcony

Abstract

To provide the structure that can prevent water exposure inside a wall body of a balcony while improving its appearance.SOLUTION: A waterproof structure of a balcony comprises a balcony outside wall 41 extending upward from an outside wall 2 of a lower floor and covering an outside surface 34 of a balcony wall body 30, a substrate material 51 provided with a clearance between the balcony outside wall 41 and the outside surface 34 of the balcony wall body 30 and extending along an upper end of the balcony wall body 30, a cover member 60 covering each upper end of the balcony wall body 30, the balcony outside wall 41 and the substrate material 51 collectively, and a waterproof member 71 to prevent water exposure to an inside of the balcony wall body 30. The waterproof member 71 is formed so as to be provided below the cover member 60 and cover each upper surfaces 30A, 51A of the balcony wall body 30 and the substrate material 51, an inside surface 36 of the balcony wall body 30, and an outside surface 51B of the substrate material 51 continuously.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waterproof structure for a balcony. [Background technology]

[0002] Conventionally, balconies have been treated to prevent water from seeping into their walls. For example, the applicant of the present application has developed a structure for preventing water seepage, as disclosed in Patent Document 1, in which waterproofing materials with plate-like portions are placed along each side at the boundary between the balcony wall and the wall surface of the building, and at the connection portions of the end faces of the frame members that make up the balcony wall. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4002518 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, the number of externally insulated buildings with insulation installed on their exterior walls has been increasing for purposes such as improving thermal insulation. Specifically, in externally insulated buildings, insulation is installed along the exterior walls. Here, balconies installed outdoors require less insulation. Therefore, it is possible to omit insulation from balconies. However, if the insulation is omitted and the exterior wall of the balcony is simply shifted toward the building by the amount of insulation, a step will be created at the boundary between the exterior wall of the lower floor and the exterior wall of the balcony, resulting in a poor appearance. In contrast, if the exterior wall of the balcony is simply connected to the exterior wall of the lower floor, there is a risk of water seeping into the interior of the balcony wall through the gap between the exterior wall of the balcony and the main wall separating the balcony.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a waterproof structure for a balcony applied to an externally insulated building, which can prevent water from entering the inside of the balcony wall body while maintaining a good appearance. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a waterproof structure for a balcony located on an upper floor of an externally insulated building whose exterior walls are provided with thermal insulation, comprising: a balcony wall main body erected from the balcony floor; a balcony outer wall extending upward from the outer wall of the floor below and covering the outer surface, which is the outdoor side, of the balcony wall main body; a base material provided in the gap between the balcony outer wall and the outer surface of the balcony wall main body and extending along the upper end of the balcony wall main body; a cover member covering the upper ends of the balcony wall main body, the balcony outer wall, and the base material; and a waterproof member for preventing water from seeping into the balcony wall main body, wherein the waterproof member is provided below the cover member and has a shape that continuously covers the upper surfaces of the balcony wall main body and the base material, the inner surface, which is the indoor side of the balcony wall main body, and the outer surface, which is the outdoor side of the base material.

[0007] In the present invention, a base material is provided in the gap between the balcony exterior wall and the balcony wall main body, extending along the upper end of the balcony wall main body. The cover member collectively covers the upper ends of the balcony wall main body, the balcony exterior wall, and the base material, and the waterproof member provided below the cover member continuously covers not only the upper surface of the balcony wall main body and the inner surface of the balcony wall, but also the upper surface of the base material and the outer surface of the base material.

[0008] Therefore, according to the present invention, the balcony exterior wall is arranged to extend upward from the exterior wall of the lower floor, eliminating these steps, and the gap that occurs between the balcony exterior wall and the balcony wall body due to this arrangement can be covered from above with a waterproofing material, thereby improving the appearance of the building and preventing water from entering the balcony wall body.

[0009] Preferably, the balcony wall main body includes a first balcony wall main body and a second balcony wall main body extending in different directions to form a corner portion, the underlayment material includes a first underlayment material extending along the upper end of the first balcony wall main body and a second underlayment material extending along the upper end of the second balcony wall main body, and the waterproofing member includes a corner waterproofing member that is provided at the corner portion and continuously covers the upper surfaces of the first balcony wall main body, the first underlayment material, the second balcony wall main body and the second underlayment material, the inner surfaces of the first balcony wall main body and the second balcony wall main body, and the outer surfaces of the first underlayment material and the second underlayment material (Claim 2).

[0010] This configuration makes it possible to prevent water from seeping into the interior of the balcony wall body through gaps between the balcony wall body and the balcony outer wall at the corners of the balcony, through joints between the balcony wall bodies, and through joints between the base materials.

[0011] Preferably, the corner waterproofing member includes a corner member attached to the inner surface of each of the first balcony wall body and the second balcony wall body, and an outside corner member attached to the outer surface of each of the first base material and the second base material, and the corner member and the outside corner member are overlapped on the upper surface of each of the first balcony wall body and the second balcony wall body (Claim 3).

[0012] With this configuration, the waterproofing range can be changed by changing the overlapping amount between the corner member and the protruding corner member. Therefore, regardless of the width of the insulation material installed on the floor below, the corner portion can be waterproofed while maintaining continuity between the balcony exterior wall and the exterior wall of the floor below.

[0013] Preferably, the balcony wall main body protrudes outdoors from a balcony attachment wall provided on the building, and the waterproofing member includes a waterproofing member for the attachment portion that is provided at the attachment portion, which is the boundary between the balcony wall main body and the balcony attachment wall, and that continuously covers the upper surface of the balcony wall main body, the inner surface of the balcony wall main body, the outer surface of the base material, and the balcony attachment wall (Claim 4).

[0014] This configuration prevents water from seeping into the interior of the balcony wall body through the gap between the balcony wall body and the balcony outer wall at the joint, and through the boundary between the balcony wall body and base material and the balcony mounting wall.

[0015] Preferably, the waterproofing member for the joint includes a pair of corner members attached to the inner surface of the balcony wall main body and the outer surface of the base material, respectively, and the pair of corner members are overlapped on the upper surface of the balcony wall main body and the surface of the balcony mounting wall (Claim 5).

[0016] With this configuration, the waterproofing range can be changed by changing the overlap amount of the pair of corner members, so the joint between the balcony exterior wall and the exterior wall of the lower floor can be made continuous and waterproof, regardless of the width dimension of the insulation installed on the lower floor.

[0017] Preferably, the balcony exterior wall is fixed to the base material (claim 6).

[0018] With this structure, the base material can be used as a fixing part for the balcony exterior wall. [Effects of the Invention]

[0019] As described above, the waterproof structure for a balcony of the present invention can prevent water from seeping into the interior of the balcony wall while maintaining a good appearance in an externally insulated building. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram of an externally insulated building to which a balcony waterproofing structure according to an embodiment of the present invention is applied. [Figure 2] 2 is an enlarged view of a part of the cross-sectional view taken along line II-II in FIG. 1. FIG. [Figure 3] 3 is an enlarged view of a part of the cross-sectional view taken along line III-III in FIG. 2. FIG. [Figure 4] FIG. 4 is a schematic perspective view showing the structure around the first interface portion. [Figure 5] FIG. 10 is a schematic perspective view showing the structure around the second interface portion. [Figure 6] FIG. 4 is a schematic perspective view showing the structure around a first corner portion. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 10 is a schematic perspective view showing another example of the waterproof member. [Figure 10] 10 is a schematic perspective view showing the structure around a first joint portion to which the waterproofing member shown in FIG. 9 is applied. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] An embodiment of the present invention will be described with reference to the drawings. Here, an externally insulated building to which the balcony waterproofing structure according to the present invention is applied will be described as a two-story house 1 shown in FIG. 1. The house 1 is, for example, a wooden house. The house 1 has a building main body 10 that divides the living space and a balcony 20. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 1. Note that FIG. 2 does not illustrate a drainage sheet 92, which will be described later, and the like. Hereinafter, the direction connecting the indoor side and the outdoor side along a horizontal plane is referred to as the indoor / outdoor direction.

[0022] As described above, the house 1 is an externally insulated building, and the exterior walls of the house 1, more specifically the exterior walls 2 of the building main body 10, are provided with insulation material 3 (FIG. 2). Specifically, the insulation material 3 is disposed between the exterior walls 2 and the columns 11 of the building main body 10 and the wall members 12 extending between the columns 11. Hereinafter, the exterior walls 2 of the building main body 10 will be referred to as the main body exterior walls 2 where appropriate.

[0023] The balcony 20 is provided on the second floor of the house 1. The balcony 20 is provided above a portion of the first floor of the main building 10. In other words, a portion of the first floor of the house 1 protrudes outdoors, and the balcony 20 is formed above this protruding portion. The balcony 20 has a rectangular shape in plan view. Accordingly, the wall 22 of the balcony 20 has a U-shape that protrudes outdoors from the second floor of the main building 10.

[0024] The wall 22 of the balcony 20 has a balcony wall main body 30, a balcony outer wall 41, an upper base material 51, a lower base material 52, and a balcony inner wall 42. Hereinafter, the wall 22 of the balcony 20 including these will be referred to as the balcony wall 22. The upper base material 51 corresponds to the "base material" of this invention.

[0025] The balcony wall main body 30 is a member that mainly divides the space of the balcony 20, and stands upright from the floor 21 of the balcony 20. The balcony wall main body 30 is attached to a balcony mounting wall 13 provided on the building main body 10. The balcony mounting wall 13 is composed of columns 11 of the building main body 10 and wall members 12 surrounding them.

[0026] The balcony wall body 30 has a capping board base material 31 arranged approximately horizontally at its upper end and a balcony beam material 32 arranged approximately horizontally at its lower end. In this embodiment, the capping board base material 31 and the balcony beam material 32 are prismatic. The capping board base material 31 is supported by a column 39 fixed to the balcony beam material 32.

[0027] An outdoor plywood 33 is attached to the outdoor side (i.e., the outer side) of the capping base material 31 and the outdoor side (i.e., the outer side) of the balcony beam 32, extending vertically across them. The surface of the outdoor plywood 33 forms the outer side (outdoor side) 34 of the balcony wall main body 30. Similarly, an indoor plywood 35 is attached to the indoor side (i.e., the inner side) of the capping base material 31 and the indoor side (i.e., the inner side) of the balcony beam 32, extending vertically across them. The surface of the indoor plywood 35 forms the inner side (indoor side) 36 of the balcony wall main body 30. In the indoor-outdoor direction, the outer side 34 of the balcony wall main body 30 is positioned at approximately the same position as the outer side of the wall member 12 of the building main body 10 located on the floor below.

[0028] The balcony exterior wall 41 covers the outer surface 34 of the balcony wall main body 30. The balcony exterior wall 41 extends upward from the main body exterior wall 2 on the floor below, and the two are connected at a nearly flush surface. The main body exterior wall 2 and the balcony exterior wall 41 are made of the same material. For example, the main body exterior wall 2 and the balcony exterior wall 41 are made of siding boards.

[0029] Here, a heat insulating material 3 is disposed between the wall member 12 of the building main body 10 and the main body outer wall 2, and the wall member 12 and the main body outer wall 2 are spaced apart in the indoor / outdoor direction. As a result, as described above, since the balcony outer wall 41 extends upward from the main body outer wall 2 on the first floor, a gap is defined between the balcony outer wall 41 and the balcony wall main body 30.

[0030] The upper and lower base materials 51 and 52 are disposed in the gap between the balcony exterior wall 41 and the balcony wall main body 30. The upper base material 51 extends along the upper end of the balcony wall main body 30. The lower base material 52 extends along the lower end of the balcony wall main body 30. The upper base material 51 is fixed to the outdoor plywood 33 and the coping base material 31 with nails or the like, and the lower base material 52 is fixed to the outdoor plywood 33 and the balcony beam 32 with nails or the like. Note that in this embodiment, no insulation material 3 is disposed on the balcony exterior wall 41. In other words, no insulation material 3 is disposed between the upper base material 51 and the lower base material 52, and the space between them is mainly empty.

[0031] In this embodiment, the upper base material 51 and the lower base material 52 are prismatic. The indoor-outdoor dimension L2 of the upper base material 51 and the lower base material 52 is approximately the same as the indoor-outdoor dimension L1 of the heat insulating material 3. In this embodiment, the vertical and horizontal dimensions of each cross section of the upper base material 51 and the lower base material 52 are set to values ​​smaller than the respective dimensions of the coping base material 31.

[0032] The balcony outer wall 41 is fixed to an upper base material 51 and a lower base material 52. Specifically, furring strips (not shown) are attached to these base materials 51, 52, and the balcony outer wall 41 is fixed to these furring strips.

[0033] The balcony inner wall 42 covers the inner surface 36 of the balcony wall main body 30. The balcony inner wall 42 is fixed to the balcony wall main body 30. Specifically, furring strips (not shown) are attached to the inner surface 36 of the balcony wall main body 30, and the balcony inner wall 42 is fixed to these furring strips. The balcony inner wall 42 is made of the same material as the main body outer wall 2 and the balcony outer wall 41.

[0034] A coping 60 is attached to the upper end of the balcony wall 22. The coping 60 is fixed to the coping base material 31. The coping 60 collectively covers the upper ends of the balcony wall main body 30, the balcony outer wall 41, the upper base material 51, and the balcony inner wall 42. The coping 60 corresponds to the "cover member" of this invention.

[0035] (waterproof structure) Fig. 3 is a schematic cross-sectional view taken along line III-III in Fig. 2. As shown in Fig. 3, a vapor-permeable waterproof sheet 91 and a drip-proof sheet 92 are disposed below the coping 60 as waterproofing members for preventing water from seeping into the balcony wall main body 30. The vapor-permeable waterproof sheet 91 covers the balcony wall main body 30 and the upper base material 51 from above. In this embodiment, the indoor-side vapor-permeable waterproof sheet 91 and the outdoor-side vapor-permeable waterproof sheet 91 cover almost the entire upper surfaces 30A and 51A of the balcony wall main body 30 and the upper base material 51, the inner surface 36 of the balcony wall main body 30, and the outer surface 51B of the upper base material 51. The drip-proof sheet 92 covers the vapor-permeable waterproof sheet 91 from above. The drip-proof sheet 92 covers the upper surfaces 30A, 51A of the balcony wall main body 30 and the upper base material 51, and the upper portions of the inner surface 36 of the balcony wall main body 30 and the outer surface 51B of the upper base material 51. These sheets 91, 92 are attached to the balcony wall main body 30 and the upper base material 51 over almost their entire length (their entire length in the horizontal direction). The breathable waterproof sheet 91 is a sheet that is impermeable to water but permeable to moisture, and is made, for example, of polyethylene nonwoven fabric. The drip-proof sheet 92 is a waterproof sheet, and is made, for example, of polyethylene or polypropylene.

[0036] Furthermore, as shown in FIG. 1 , the balcony 20 is provided below the coping 60 with a first waterproofing member 71, a second waterproofing member 72, a third waterproofing member 73, and a fourth waterproofing member 74 as waterproofing members for preventing water from seeping into the interior of the balcony wall main body 30. The first waterproofing member 71 and the second waterproofing member 72 are provided at the first joint X1 and the second joint X2, respectively. The third waterproofing member 73 and the fourth waterproofing member 74 are provided at the first corner X3 and the second corner X4, respectively. The first waterproofing member 71 and the second waterproofing member 72 each correspond to the "waterproofing member for joint" in the present invention. The third waterproofing member 73 and the fourth waterproofing member 74 each correspond to the "corner waterproofing member" in the present invention.

[0037] Figures 4, 5, and 6 are schematic perspective views showing the structures around the first joint X1, the second joint X2, and the first corner X3, respectively. Note that Figures 4 to 6 show a portion of the balcony wall 22 with the balcony outer wall 41, the balcony inner wall 42, and the coping 60 removed. Also, Figure 4 shows a line corresponding to line III-III in Figure 1.

[0038] Specifically, in this embodiment, the balcony wall main body 30 is composed of a first wall main body 130 and a second wall main body 230 that each protrude from the balcony mounting wall 13 toward the outdoors, and a third wall main body 330 that extends between the outdoors-side end of the first wall main body 130 and the end of the second wall main body 230. The upper base material 51 is composed of a first base material 151, a second base material 251, and a third base material 351 that extend along the upper ends of the first wall main body 130, the second wall main body 230, and the third wall main body 330, respectively. The first joint portion X1 is the boundary between the balcony mounting wall 13 and the first wall main body 130. The second joint portion X2 is the boundary between the balcony mounting wall 13 and the second wall main body 230. The first corner portion X3 is the connection portion between the first wall main body 130 and the third wall main body 330, and is a corner portion formed by these. The second corner portion X4 is a corner portion formed by the connection between the second wall main body 230 and the third wall main body 330. With regard to the first corner portion X3, the first wall main body 130 corresponds to the "first balcony wall main body" of the present invention, and the third wall main body 330 corresponds to the "second balcony wall main body." With regard to the second corner portion X4, the second wall main body 230 corresponds to the "first balcony wall main body" of the present invention, and the third wall main body 330 corresponds to the "second balcony wall main body."

[0039] Here, at the first interface X1, the outer surface of the first base material 151 protrudes from the middle of one side surface 13A of the balcony mounting wall 13. On the other hand, as shown in FIG. 1, the second interface X2 is provided at the corner formed by one side surface 13A and the other side surface 13B of the balcony mounting wall 13. Thus, at the second interface X2, the second base material 251 is disposed so that its outer surface protrudes from one side surface 13A of the balcony mounting wall 13 and extends along the other side surface 13B. Note that at the second interface X2, the balcony outer wall 41 is substantially flush and continuous with both the first-floor main body outer wall 2 and the second-floor main body outer wall 2. Hereinafter, the one side surface 13A of the balcony mounting wall 13 facing the balcony 20 will be referred to as the first surface 13A, and the other side surface 13B forming a corner with the first surface 13A will be referred to as the second surface 13B.

[0040] (First waterproofing member) 4 and other drawings, in this embodiment, a pair of corner members 700 are used as the first waterproofing member 71. FIG.

[0041] The angular member 700 is composed of a first covering portion 710, a second covering portion 720, and a third covering portion 730, each of which has a plate shape. The second covering portion 720 and the third covering portion 730 have a rectangular shape. The second covering portion 720 and the third covering portion 730 form a substantially right angle with each other, and are connected so that one side of each portion forms a common line segment. If the direction along the common side 713 of the second covering portion 720 and the third covering portion 730 is defined as the reference direction, the first covering portion 710 extends from one end 711, 712 of each of the second covering portion 720 and the third covering portion 730 in the reference direction along a plane perpendicular to the reference direction. Furthermore, when viewed along the reference direction, the first covering portion 710 extends toward the side where the angle formed by the second covering portion 720 and the third covering portion 730 is larger (the side forming approximately 270 degrees) relative to one end 711, 712 of the second covering portion 720 and the third covering portion 730 in the reference direction.

[0042] In this embodiment, the second covering portion 720 and the third covering portion 730 are substantially square-shaped. When viewed along the reference direction, the first covering portion 710 is substantially L-shaped, with a region including one corner of the square and defined by lines connecting the centers of two adjacent sides of the square to the center of the square being cut away. That is, as shown in FIG. 7 , if the reference direction is defined as the up-down direction, the direction along the surface of the second covering portion 720 is defined as the front-rear direction, and the direction along the surface of the third covering portion 730 is defined as the left-right direction, the front-rear dimension L21 and the left-right dimension L22 of the first covering portion 710 are set to be substantially the same dimension. The front-rear dimension L23 of the second covering portion 720 is set to be approximately half the front-rear dimension L21 of the first covering portion 710. Furthermore, the left-right dimension L24 of the third covering portion 730 is set to be approximately half the left-right dimension L22 of the first covering portion 710. Furthermore, the up-down dimension L25 of the second covering portion 720 and the third covering portion 730 is set to be approximately the same as the front-to-rear dimension L23 of the second covering portion 720 and the left-to-right dimension L24 of the third covering portion 730. The corner member 700 is mainly formed from a plate or sheet made of a rigid resin such as polyethylene, EVA (ethylene-vinyl acetate copolymer), polyvinyl chloride, or butyl rubber.

[0043] At the first joint portion X1, one corner member 700A (700) is arranged so that its third covering portion 730 is along the upper surface 30A of the first wall main body 130, its second covering portion 720 is along the inner surface 36 of the first wall main body 130, and its first covering portion 710 is along the first surface 13A of the balcony mounting wall 13. Furthermore, the other corner member 700B (700) is arranged so that its second covering portion 720 is along the upper surface 51A of the first base material 151, its third covering portion 730 is along the outer surface 51B of the first base material 151, and its first covering portion 710 is along the first surface 13A of the balcony mounting wall 13.

[0044] At the first joint X1, the two corner members 700A, 700B are overlapped on the upper surface 30A of the first wall main body 130 and the first surface 13A of the balcony mounting wall 13. Specifically, on the upper surface 30A of the first wall main body 130, the second covering portion 720 of the outdoor-side corner member 700B is overlapped on the third covering portion 730 of the indoor-side corner member 700A. Also, on the first surface 13A of the balcony mounting wall 13, the first covering portion 710 of the outdoor-side corner member 700B is overlapped on the first covering portion 710 of the indoor-side corner member 700A.

[0045] Thus, at the first joint X1, the pair of corner members 700, 700, i.e., the first waterproofing member 71, continuously cover the top surfaces 30A, 51A of the first wall main body 130 and the first base material 151, the inner surface 36 of the first wall main body 130, the outer surface 51B of the first base material 151, and the first surface 13A of the balcony mounting wall 13. Here, at the first joint X1, the first waterproofing member 71 is placed on the breathable waterproof sheet 91 and the drip sheet 92, and covers the above-mentioned surfaces from above these sheets 91, 92. The corner members 700 are fixed to each other and to each surface with waterproof tape or the like.

[0046] (Second waterproofing member) As shown in FIG. 5 and other figures, in this embodiment, similar to the first waterproofing member 71, a pair of corner members 700 are used as the second waterproofing member 72.

[0047] At the second joint portion X2, one corner member 700C (700) is arranged so that its third covering portion 730 follows the upper surface 30A of the second wall main body 230, its third covering portion 730 follows the inner surface 36 of the second wall main body 230, and its first covering portion 710 follows the first surface 13A of the balcony mounting wall 13. The other corner member 700D (700) is arranged so that its third covering portion 730 follows the upper surface 51A of the second base material 251, its second covering portion 720 follows the first surface 13A of the balcony mounting wall 13, and its first covering portion 710 follows the outer surface 51B of the second base material 251 and the second surface 13B of the balcony mounting wall 13.

[0048] At the second joint portion X2, the two corner members 700C, 700D are overlapped on the upper surface 30A of the second wall main body 230 and the first surface 13A of the balcony mounting wall 13. Specifically, on the upper surface 30A of the second wall main body 230, the third covering portion 730 of the outdoor-side corner member 700C is overlapped on the second covering portion 720 of the indoor-side corner member 700D. At the first surface 13A of the balcony mounting wall 13, the second covering portion 720 of the outdoor-side corner member 700C is overlapped on the first covering portion 710 of the indoor-side corner member 700D.

[0049] Thus, at the second joint X2, the pair of corner members 700, 700, i.e., the second waterproofing member 72, continuously cover the upper surface 30A of the second wall main body 230, the upper surface 51A of the second base material 251, the inner surface 36 of the second wall main body 230, the outer surface 51B of the second base material 251, the first surface 13A of the balcony mounting wall 13, and the second surface 13B of the balcony mounting wall 13. Here, at the second joint X2, the second waterproofing member 72 is disposed on top of the breathable waterproof sheet 91 and the drip sheet 92, and covers the above-mentioned surfaces from above these sheets 91, 92. Note that at the second joint X2, as with the first joint X1, the corner members 700 are fixed to each other and to each surface with waterproof tape or the like.

[0050] (Third waterproofing member) 6 and other drawings, in this embodiment, a corner member 700 and an external corner member 800 are used as the third waterproofing member 73. FIG.

[0051] The corner member 800 is composed of a first side portion 810, a second side portion 820, and a third side portion 830, each of which has a plate-like shape. The second side portion 820 and the third side portion 830 are rectangular. The second side portion 820 and the third side portion 830 form a substantially right angle with each other, and are connected so that one side of each side portion forms a common line segment. The first side portion 810 is rectangular. If the direction along the common side 813 of the second side portion 820 and the third side portion 830 is defined as the reference direction, the first side portion 810 extends from one end 811, 812 of each of the second side portion 820 and the third side portion 830 in the reference direction along a plane perpendicular to the reference direction. Furthermore, when viewed along the reference direction, the first side portion 810 extends toward the side where the angle formed by the second side portion 820 and the third side portion 830 is smaller (the side forming approximately 90 degrees) with respect to one ends 811, 812 of the second side portion 820 and the third side portion 830 in the reference direction. In this embodiment, the second side portion 820 and the third side portion 830 have a substantially rectangular shape. Furthermore, the first side portion 810 has a substantially square shape with the lengths L31, l32 of its two sides being approximately the same. The projected corner member 800 is formed from a plate or sheet of the same material as the corner member 700.

[0052] In the first corner portion X3, the corner member 700E (700) is arranged so that its third covering portion 730 is along the inner surface 36 of the first wall main body 130, its second covering portion 720 is along the inner surface 36 of the third wall main body 330, and its first covering portion 710 is along the respective upper surfaces 30A of the first wall main body 130 and the second wall main body 230. In addition, the protruding corner member 800 is arranged so that its second side portion 820 is along the outer surface 51B of the first base material 151, its third side portion 830 is along the outer surface 51B of the third base material 351, and its first side portion 810 is along the respective upper surfaces 51A of the first base material 151 and the third base material 351.

[0053] Furthermore, at the first corner portion X3, the corner member 700E and the protruding corner member 800 are overlapped with each other on the upper surface 30A of at least one of the first wall main body 130 and the third wall main body 330. Specifically, on each upper surface 30A of the first wall main body 130 and the third wall main body 330, the first side portion 810 of the protruding corner member 800 is overlapped on the first covering portion 710 of the corner member 700E. Note that in this embodiment, in order to prevent the protruding corner member 800 from protruding from the wall main bodies 130, 330 toward the indoor side, the corner portion of the first side portion 810 of the protruding corner member 800 is cut off to match the dimensions of the wall main bodies 130, 330 and the base materials 151, 351.

[0054] As described above, in the first corner portion X3, the third waterproofing member 73, which is composed of the corner member 700 and the protruding corner member 800, continuously covers the upper surfaces 30A of the first wall main body 130 and the third wall main body 330, the upper surfaces 51A of the first base member 151 and the third base member 351, the inner surfaces 36 of the first wall main body 130 and the third wall main body 330, and the outer surfaces 51B of the first base member 151 and the third base member 351. Here, no drip sheet 92 is provided in the first corner portion X3, and the third waterproofing member 73 is provided on the moisture-permeable waterproof sheet 91. The third waterproofing member 73 covers the above-mentioned surfaces from above the moisture-permeable waterproof sheet 91. The corner member 700 and the protruding corner member 800 are fixed to each other and to their respective surfaces with waterproof tape or the like.

[0055] (Fourth waterproofing component) The structure of the fourth waterproofing member 74 and its mounting structure are similar to those of the third waterproofing member 73, and therefore a description thereof will be omitted. The structure of the fourth waterproofing member 74 is identical to the structure of the third waterproofing member 73 described above, except that the first wall main body 130 is replaced with the second wall main body 230, the first base material 151 is replaced with the second base material 251, the second side portion 820 is replaced with the first side portion 810, and the third side portion 830 is replaced with the second side portion 820.

[0056] Here, the coping base material 31 is typically a rectangular column with a cross-sectional vertical and horizontal dimension of 105 mm, or a rectangular column with both dimensions of 120 mm. Furthermore, the insulation material 3 typically has a width L1 of 30 mm or more and 100 mm or less. Furthermore, the outdoor plywood 33 and the indoor plywood 35 typically have a thickness (dimension in the indoor-outdoor direction) of 8 mm. Therefore, the indoor-outdoor dimension L10 of the combined balcony wall main body 30 and upper base material 51 is generally 153 mm or more and 238 mm or less. Therefore, in order to prevent the pair of corner members 700 from protruding from the upper surface 30A of the balcony wall main body 30 and the upper base material 51, and to overlap them on the upper surface 30A of the balcony wall main body 30, it is preferable that the lengths L23, L24, and L25 of each side of the second covering portion 720 and the third covering portion 730 of the corner member 700 be 119 mm or more and 153 mm or less. Correspondingly, in this embodiment, the second covering portion 720 and the third covering portion 730 of the corner member 700 are square-shaped with sides measuring 150 mm. Furthermore, the first covering portion 710 of the corner member 700 is square-shaped with sides measuring 300 mm.

[0057] (effect, etc.) As described above, in this embodiment, the balcony outer wall 41 provided on the second floor is flush with and connected to the outer wall 2 of the building main body 10 on the first floor. This improves the appearance of the exterior of the house 1.

[0058] Moreover, an upper base material 51 extending along the upper end of the balcony wall main body 30 is placed in the gap between the balcony outer wall 41 and the balcony wall main body 30, which is created by making the balcony outer wall 41 and the outer wall 2 flush as described above. The upper ends of the balcony wall main body 30, the balcony outer wall 41 and the upper base material 51 are collectively covered by the coping board 60, and below the coping board 60, the drip sheet 92 continuously covers the upper surfaces 30A, 51A of the balcony wall main body 30 and the upper base material 51, as well as the upper parts of the inner surface 36 of the balcony wall main body 30 and the outer surface 51B of the upper base material 51. Furthermore, the upper surfaces 30A, 51A of the balcony wall main body 30 and the upper base material 51, and the upper portions of the inner surface 36 of the balcony wall main body 30 and the outer surface 51B of the upper base material 51, are continuously covered by the first waterproofing member 71 at the first joint X1, and are also covered by the second waterproofing member 72 at the second joint X2. Furthermore, the upper surfaces 30A, 51A of the balcony wall main body 30 and the upper portions of the inner surface 36 of the balcony wall main body 30 and the outer surface 51B of the upper base material 51 are continuously covered by the third waterproofing member 73 and the fourth waterproofing member 74, respectively, at the first corner X3 and the second corner X4. This prevents water from entering the interior of the balcony wall main body 30 from above through the gap between the balcony outer wall 41 and the balcony wall main body 30.

[0059] In particular, at the first corner portion X3, the top surfaces 30A and inner surfaces 36 of the first wall main body 130 and the third wall main body 330, and the top surfaces 51A and outer surfaces 51B of the first base material 151 and the third base material 351 are continuously covered by the third waterproofing member 73. This prevents water from seeping into the interior of the balcony wall main body 30 from the boundary between the first wall main body 130 and the third wall main body 330. Similarly, at the second corner portion X4, the fourth waterproofing member 74 prevents water from seeping into the interior of the balcony wall main body 30 from the boundary between the second wall main body 230 and the third wall main body 330.

[0060] Furthermore, at each corner portion X3, X4, the corner member 700 and the projecting corner member 800 are overlapped on the upper surface of the balcony wall main body 30. This improves waterproofing. Furthermore, by changing the amount of overlap, the overall dimensions of the third waterproofing member 73 (fourth waterproofing member 74) can be changed. Therefore, for balconies with different dimensions of the insulation material 3 arranged on the first floor, and therefore different dimensions of the upper base material 51 and the cap base material 31, the first corner portion X3 (second corner portion X4) can be waterproofed using a common third waterproofing member 73 (fourth waterproofing member 74).

[0061] Furthermore, at the first joint X1, the first waterproofing member 71 covers the upper surfaces 30A and 51A of the first wall main body 130 and the first base material 151, the inner surface 36 of the first wall main body 130, the outer surface 51B of the first base material 151, and the balcony mounting wall 13 in a continuous manner. This prevents water from seeping into the interior of the first wall main body 130 from the boundaries between the first wall main body 130 and the first base material 151 and the balcony mounting wall 13. Similarly, at the second joint X2, it is possible to prevent water from seeping into the interior of the second wall main body 230 from the boundaries between the second wall main body 230 and the second base material 251 and the balcony mounting wall 13.

[0062] Furthermore, at each joint X1, X2, the corner members 700 are overlapped on the upper surface of the balcony wall main body 30. This improves waterproofing. Furthermore, by changing the amount of overlap, the overall dimensions of the first waterproofing member 71 (second waterproofing member 72) can be changed. Therefore, for balconies with different dimensions of the insulation material 3 arranged on the first floor, and therefore different dimensions of the upper base material 51 and the capping base material 31, the first joint X1 (second joint X2) can be waterproofed by using a common first waterproofing member 71 (second waterproofing member 72).

[0063] In this embodiment, the balcony outer wall 41 is fixed to the upper base material 51. Therefore, the upper base material 51 can be used as a component for fixing the balcony outer wall 41.

[0064] (Variation) The waterproofing member for preventing water from seeping into the interior of the balcony wall body only needs to have a shape that continuously covers the upper surfaces of the balcony wall body and the upper base material, the inner surface which is the indoor side of the balcony wall body, and the outer surface of the upper base material, and its specific structure is not limited to the structure of the above-mentioned water drainage sheet 92 or each of the waterproofing members 71 to 74.

[0065] For example, in the above embodiment, the waterproofing members provided at the joint portions X1 and X2 are configured with two parts, but the waterproofing members may be configured with one part. Similarly, the waterproofing members provided at the corner portions X3 and X4 may be configured with one part.

[0066] When the waterproofing member provided at the first interface portion X1 is configured from a single component, a waterproofing member 500 as shown in FIG. 9 may be used as the waterproofing member.

[0067] 9 has a U-shaped, plate-like bottom 510 extending in a predetermined direction. Hereinafter, the longitudinal direction of bottom 510 will be simply referred to as the longitudinal direction. The outer peripheral edge of bottom 510, which surrounds the inner space of the U-shape, has a second edge 512 extending along the longitudinal direction, a first edge 511 extending from one end of second edge 512 in the lateral direction of bottom 510, and a third edge 513 extending from the other end of second edge 512 in the lateral direction of bottom 510 parallel to first edge 511. The waterproof member 500 further has a first standing wall portion 520 extending from the first edge 511 in a direction perpendicular to the bottom portion 510, a second standing wall portion 530 extending from the second edge 512 in a direction perpendicular to the bottom portion 510, and a third standing wall portion 540 extending from the third edge 513 in a direction perpendicular to the bottom portion 510. The standing walls 520 and 530 extend in the same direction relative to the bottom portion 510.

[0068] A plurality of folds 550 are formed in the longitudinal center of the bottom 510 and in the second standing wall 530, extending parallel to one another along the longitudinal direction. Each fold 550 is formed so as to be continuous across the bottom 510 and the second standing wall 530. The folds 550 allow the waterproof member 500 to stretch in the longitudinal direction of the bottom 510.

[0069] The waterproofing member 500 configured as described above is attached to the first joint X1, for example, as shown in Fig. 10. Specifically, in the example of Fig. 10, a portion of the fold 550 is folded so that the longitudinal dimension of the second standing wall portion 530 matches the indoor-outdoor dimension of the combined portion of the first base material 151 and the first wall main body 130. Then, with the fold 550 folded, the waterproofing member 500 is disposed at the first joint X1 so that the second standing wall portion 530 is aligned with the upper surfaces 30A and 51A of the first base material 151 and the first wall main body 130, the first standing wall portion 520 is aligned with the inner surface 36 of the first wall main body 130, and the third standing wall portion 540 is aligned with the outer surface 51B of the first base material 151. The bottom portion 510 is also disposed so as to be aligned with the first surface 13A of the balcony mounting wall 13. With this arrangement, the waterproofing member 500 shown in Fig. 9 also continuously covers the upper surfaces 30A and 51A of the first wall main body 130 and the first base material 151, the inner surface 36 of the first wall main body 130, the outer surface 51B of the first base material 151, and the first surface 13A of the balcony mounting wall 13. The waterproofing member 500 shown in Fig. 9 allows the longitudinal dimension of the second standing wall portion 530 to be adjusted, so that, as in the above embodiment, a common waterproofing member 500 can be used to achieve a waterproof structure for balconies with different dimensions of the insulation material 3, and therefore the dimensions of the upper base material 51 and the dimensions of the coping base material 31. The waterproofing members provided at the second joint portion X2 and the corner portions X3 and X4 may also be similarly configured from a single component with folds.

[0070] Another example of a waterproofing member constructed from a single component and installed at the first interface X1 is the waterproofing member 500 shown in FIG. 9 without the fold 550. When the fold is omitted, it is preferable to set the distance between the third standing wall portion 540 and the first standing wall portion 520 equal to or greater than the maximum indoor-outdoor dimension L10 of the combined balcony wall main body 30 and upper base material 51. This allows the waterproofing member to be deformed or divided into two parts at the construction site and then overlapped as in the above embodiment, thereby adapting to balconies 20 with different dimensions. The waterproofing members installed at the second interface X2 and corner portions X3 and X4 may also be constructed from a single component without a fold, and the waterproofing structure may be achieved by deforming or dividing the component.

[0071] Furthermore, the waterproofing members provided at the joint portions X1 and X2 may be composed of three or more parts. For example, a pair of corner members 700 may be arranged spaced apart from each other, with another waterproofing member sealing the gap between them. Similarly, the waterproofing members provided at the corner portions X3 and X4 may also be composed of three or more parts.

[0072] Furthermore, in the above embodiment, the case where the thermal insulation material 3 is not provided on the balcony outer wall 41 has been described, but the thermal insulation material 3 may be provided on the balcony outer wall 41. In other words, the thermal insulation material 3 may be disposed between the upper base material 51 and the lower base material 52.

[0073] Furthermore, the specific dimensions of the corner member 700 are not limited to those described above. Furthermore, the floor on which the balcony 20 is provided may be any floor above the floor on which the heat insulating material is provided on the exterior wall, and is not limited to the second floor. [Explanation of symbols]

[0074] 1. Externally insulated buildings 10 Building body 13 Balcony mounting wall 20 Balcony 30 Balcony wall body 41 Balcony exterior wall 42 Balcony interior wall 51 Upper base material (base material) 60 Cap (cover part) 71 First waterproof member (waterproof member for joint, waterproof member) 72 Second waterproofing member (waterproofing member for joint, waterproofing member) 73 Third waterproofing material (corner waterproofing material, waterproofing material) 74 Fourth waterproofing material (corner waterproofing material, waterproofing material) 92 Water drainage sheet (waterproof material) 700 Corner member 800 Outside corner member X1 First mating part (mating part) X2 Second mating part (mating part) X3 First corner (corner) X4 Second corner (corner)

Claims

1. A waterproof structure for a balcony installed on the upper floor of an externally insulated building with thermal insulation material installed on the exterior wall, A balcony wall body erected from the balcony floor; a balcony exterior wall extending upward from the exterior wall of the lower floor and covering the exterior surface, which is the outdoor side surface of the balcony wall main body; a base material provided in the gap between the balcony outer wall and the outer surface of the balcony wall main body and extending along the upper end of the balcony wall main body; a cover member that collectively covers the upper ends of the balcony wall body, the balcony outer wall, and the base material; A waterproof member is provided to prevent water from entering the balcony wall body, The waterproof structure for a balcony is characterized in that the waterproof member is provided below the cover member and has a shape that continuously covers the upper surfaces of the balcony wall body and the base material, the inner surface which is the indoor side of the balcony wall body, and the outer surface which is the outdoor side of the base material.

2. The waterproof structure for a balcony according to claim 1, the balcony wall body includes a first balcony wall body and a second balcony wall body extending in different directions to form a corner portion, the underlayment material includes a first underlayment material extending along an upper end of the first balcony wall body and a second underlayment material extending along an upper end of the second balcony wall body, a waterproof structure for a balcony, characterized in that the waterproofing members include corner waterproofing members that are provided at the corner portions and continuously cover the upper surfaces of the first balcony wall body, the first base material, the second balcony wall body and the second base material, the inner surfaces of the first balcony wall body and the second balcony wall body, and the outer surfaces of the first base material and the second base material.

3. The waterproof structure for a balcony according to claim 2, the corner waterproofing members include corner members attached to the inner surfaces of the first balcony wall body and the second balcony wall body, and external corner members attached to the outer surfaces of the first base material and the second base material, A waterproof structure for a balcony, characterized in that the corner members and the external corner members are overlapped on the upper surfaces of the first balcony wall body and the second balcony wall body.

4. The waterproof structure for a balcony according to claim 1, the balcony wall body protrudes to the outdoors from a balcony attachment wall provided on the building, The balcony waterproof structure is characterized in that the waterproofing member includes a joint waterproofing member that is provided at the joint that is the boundary between the balcony wall main body and the balcony attachment wall, and that continuously covers the upper surface of the balcony wall main body, the inner surface of the balcony wall main body, the outer surface of the base material, and the balcony attachment wall.

5. The waterproof structure for a balcony according to claim 4, The waterproofing member for the joint includes a pair of corner members attached to the inner surface of the balcony wall body and the outer surface of the base material, respectively; A waterproof structure for a balcony, characterized in that a pair of the corner members are overlapped on the upper surface of the balcony wall body and the surface of the balcony mounting wall.

6. The waterproof structure for a balcony according to any one of claims 1 to 5, A waterproof structure for a balcony, characterized in that the balcony outer wall is fixed to the base material.

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