Waterproofing of buildings

Abstract

To provide a waterproof structure of a building and a construction method of a waterproof structure capable of facilitating a construction work.SOLUTION: A building comprises an outer wall face portion 25, and a lean-to roof portion 18 downwardly obliquely extending to a side separated from the outer wall face portion 25. In a boundary portion between the outer wall face portion 25 and the lean-to roof portion 18, an opening area 27 between both 18 and 25 extends along the boundary portion. On the lean-to roof portion 18, a verge water drip material 39 extending along a verge 19 is provided, and an end of the verge water drip material 39 enters an end at a side end face 29 side of the opening area 27. A waterproof structure comprises a short-sized short accessory 60 covering a gap between an upper face of the verge water drip material 39 and a lower end face 28 of the outer wall face portion 25 in the opening area 27. The short accessory 60 includes a protruding portion 65 protruding from the verge water drip material 39 toward an opposite side to the side end face 29 side. A flashing material 50 is provided so as to overlap with the protruding portion 65 in a state where an end in a longer direction is in contact with a side face of the verge water drip material 39.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a waterproof structure for a building. To make This is related to. [Background technology]

[0002] Buildings such as houses may have a shed as a roof. The shed is installed, for example, at a downward angle from the exterior wall of the building. In such buildings, a flashing material is usually installed along the boundary between the shed and the exterior wall (see, for example, Patent Document 1). The flashing material is a long material that extends along the boundary, and is installed so as to cover an opening that occurs between the shed and the exterior wall. This prevents rainwater from entering through the boundary between the shed and the exterior wall. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-94369 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned building, a gable flashing material may be installed on top of the eaves, extending along the gable. In that case, it is assumed that the end of the gable flashing material is located at the opening between the eaves and the exterior wall, more specifically, at the end of the opening. In such a case, the fit between the end of the gable flashing material and the end of the flashing material becomes an issue.

[0005] As a countermeasure to the above problem, it is conceivable to process (e.g., cut) the ends of the gable flashing and the flashing on-site to match them. However, because both the gable flashing and the flashing have complex cross-sectional shapes, it is expected that processing on-site will be difficult and construction errors will likely occur.

[0006] Therefore, it is possible to process the ends of the flashing material in advance at the factory to match the shape of the ends of the gable flashing material. For example, it is possible to process the ends of the flashing material in a shape that allows them to be placed in the upper area of ​​the gable flashing material at the opening. In this way, it is not necessary to process the ends of the flashing material on site.

[0007] However, when installing the flashing material with the processed end at the opening between the exterior wall and the eaves on-site, it is necessary to first insert the processed end into the upper area of ​​the gable flashing material at the opening and then place the flashing material in the inserted state. Therefore, it is considered that the installation work of the flashing material is difficult. In particular, since the flashing material is a long material, it is difficult to handle, and the installation work is considered to be very difficult.

[0008] The present invention has been made in consideration of the above circumstances, and provides a waterproofing structure for a building that can facilitate construction work. Construction The main purpose of this document is to provide [Means for solving the problem]

[0009] In order to solve the above problems, a waterproof structure for a building according to a first invention comprises an exterior wall surface portion formed by arranging a plurality of exterior wall surface materials side by side, and a shed portion extending at a downward incline away from the exterior wall surface portion, and at the boundary portion between the exterior wall surface portion and the shed portion, an opening area between them has a predetermined vertical width and extends along the boundary portion, and the exterior wall surface portion is formed with a first end face that defines an upper end of the opening area, and a second end face that is perpendicular to the first end face and defines a side end of the opening area, and a gable drip-proof material is provided on the shed portion and extends along the gable of the shed portion, and the gable drip-proof material is provided on the gable portion. This waterproof structure for a building is applied to a building in which the end of a flashing material extends into the end of the second end face side of the opening area, is long and extends along the boundary, and is provided with a rain guttering material covering the opening area, and is characterized in that it has a short, short-length accessory that covers the area between the top surface of the gable flashing material and the first end face in the opening area, the short-length accessory having an extension portion that extends beyond the gable flashing material toward the side opposite the second end face, and the rain guttering material is arranged overlapping the extension portion with its longitudinal end abutted against the side of the gable flashing material.

[0010] According to the first invention, the end of the gable flashing material is inserted into the end of the second end face side of the exterior wall surface part in the opening area between the exterior wall surface part and the eaves part. In this configuration, the area between the upper surface of the gable flashing material in the opening area and the first end face of the exterior wall surface part is covered with a short accessory. In this case, since the short accessory is short, it is easy to handle and can be easily installed. In addition, the short accessory extends beyond the gable flashing material toward the opposite side to the second end face side of the exterior wall surface part. The flashing material is provided overlapping the extending part of the short accessory with its longitudinal end abutting against the side of the gable flashing material. This allows the side opposite the second end face side of the gable flashing material in the opening area to be covered by the flashing material. In addition, in this case, when installing the flashing material, it is sufficient to install the end of the flashing material by abutting against the side of the gable flashing material, so that the installation work is easy and there is no need to process the end of the flashing material. Therefore, construction work can be simplified.

[0011] The waterproof structure for a building of the second invention is characterized in that, in the first invention, the rain guttering material is overlapped on the extending portion of the short accessory from the outdoor side.

[0012] According to the second aspect of the present invention, when installing the flashing, the short accessories are attached first, and then the flashing can be installed while pressing the extension of the short accessories from the outdoor side. This makes the installation work even easier.

[0013] The waterproof structure for a building of the third invention is characterized in that, in the first or second invention, the short-length accessory is formed in a rectangular plate shape and has a first side portion arranged along the first end face, a second side portion arranged along the second end face, and a third side portion arranged along the upper surface of the gable flashing material, and the second side portion of the short-length accessory is recessed toward the indoor side to form a first concave portion which, together with the second end face, forms a groove-shaped sealing filling portion into which sealing material is filled.

[0014] According to the third invention, the second side of the short feature arranged along the second end face of the outer wall surface is recessed toward the indoor side, so that the second side is a first recessed portion that forms a groove-shaped seal filling portion together with the second end face. This allows the gap between the second end face and the short feature to be sealed by filling the seal filling portion with a sealant. In this case, the seal processing portion is clearly defined, so that reliable waterproofing can be performed.

[0015] The waterproof structure for a building of the fourth invention is characterized in that, in the third invention, the first side of the short component is a second concave portion that is concave toward the indoor side and forms a groove-shaped sealing filling portion together with the first end face into which sealing material is filled, and the second concave portion is formed continuously with the first concave portion.

[0016] According to the fourth invention, the first side of the short accessory arranged along the first end face of the outer wall surface is recessed toward the indoor side, so that the first side forms a second recessed portion that forms a groove-shaped seal filling portion together with the first end face. This allows the first end face and the short accessory to be sealed by filling the seal filling portion with a sealant. In addition, since the second recessed portion is formed continuously with the first recessed portion, the seal filling portions formed by the respective recessed portions can be made continuous with each other. Therefore, the seal filling portions can be filled continuously with the sealant, and more reliable waterproofing can be achieved.

[0017] The waterproof structure for a building of the fifth invention is characterized in that, in the fourth invention, the third edge side of the short component is recessed toward the inside of the room, thereby forming a third recessed portion which, together with the upper surface of the gable drip-proof material, forms a groove-shaped sealing filling portion into which sealing material is filled, and the third recessed portion is formed continuously with the first recessed portion.

[0018] According to the fifth invention, the third edge of the short accessory arranged along the upper surface of the gable flashing material is recessed toward the indoor side, so that the third edge is a third recessed portion that forms a groove-shaped seal filling portion together with the upper surface of the gable flashing material. This allows the gable flashing material and the short accessory to be sealed by filling the seal filling portion with a sealant. In addition, since the third recessed portion is formed continuously with the first recessed portion, in this case, the first recessed portion, the second recessed portion, and the third recessed portion are each formed continuously. This allows the seal filling portions formed by each recessed portion to be continuous with each other, so that the seal filling portions can be filled with the sealant continuously. This allows for more reliable waterproofing.

[0019] The waterproof structure construction method of the sixth invention is a waterproof structure construction method applied when constructing the waterproof structure of a building of the second invention, and is characterized in that it comprises a short-length accessory installation process for installing the short-length accessory so as to cover the area between the upper surface of the gable flashing material and the first end surface in the opening area, with the gable flashing material previously installed on the eaves portion, and a rain gutter installation process for installing the rain gutter material by overlapping it on the extended portion of the short-length accessory from the outdoor side, with the longitudinal end of the rain gutter material abutting against the side of the gable flashing material.

[0020] According to the sixth aspect of the invention, the short accessories are installed first, and then the flashing is installed. When installing the flashing, the end of the flashing can be placed against the side of the gable flashing, making the installation easy and eliminating the need to process the end of the flashing. This makes the construction work easier. Also, the flashing can be installed while being placed against the extension of the short accessories from the outdoor side, which also makes the construction work easier. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view showing an overview of a modular building. [Diagram 2] An oblique view showing the boundary area between the roof panel that constitutes the lower section and the exterior wall surface. [Diagram 3] An oblique view showing the waterproof structure around the boundary between the eaves and the exterior wall surface. [Figure 4] FIG. [Diagram 5] A front view showing an enlarged view of the short-length props and their surroundings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the waterproof structure of the present invention is applied to a modular building in which a plurality of building units are combined with each other. Figure 1 is a perspective view showing an overview of the modular building.

[0023] As shown in FIG. 1, a building 10 comprises a building main body 13 having a first floor portion 11 and a second floor portion 12. The building main body 13 is constructed by combining a plurality of building units 15 with each other. The building unit 15 has a frame body formed into a rectangular parallelepiped shape having pillars and beams, and is constructed by attaching wall materials (such as an exterior wall panel 22 described below), floor materials, ceiling materials, etc. to the frame body. The building units 15 are manufactured in advance in a manufacturing factory and are transported to the construction site by truck or the like. Although not shown in the figure, a roof portion is provided above the building main body 13.

[0024] The first floor section 11 of the building main body 13 has a first floor projection 16 that projects beyond one side surface of the second floor section 12. A lower eaves section 18 is provided above the first floor projection 16. The lower eaves section 18 is provided to project from an exterior wall section 21 that forms the one side surface of the second floor section 12. The lower eaves section 18 has a sloped roof that slopes downward on the side away from the exterior wall section 21.

[0025] The exterior wall section 21 comprises a plurality of exterior wall panels 22 arranged side by side. The exterior wall panel 22 has an exterior wall surface material 23 facing the outdoors, and a base frame 24 provided on the back side of the exterior wall surface material 23 (see FIG. 2). The exterior wall surface material 23 is made of, for example, a ceramic siding board. The base frame 24 has a plurality of frame members 26 made of steel, and is constructed by connecting these plurality of frame members 26 into a rectangular frame shape. The exterior wall surface material 23 is fixed to this base frame 24 with screws or the like.

[0026] In the exterior wall section 21, an exterior wall surface section 25 is formed by a plurality of exterior wall surface materials 23 arranged side by side. At the boundary between the exterior wall surface section 25 and the shed section 18, an opening area 27 is formed between the two 18, 25 and extends horizontally along the boundary. The opening area 27 is an area between the lower end face of the exterior wall surface section 25 and the upper end of the shed section 18, and has a predetermined vertical height. As described below, the opening area 27 is covered with a rain flashing material 50 or the like to prevent rainwater from entering.

[0027] The outer wall surface portion 25 has a lower end surface 28 that defines the upper end of the opening region 27, and a side end surface 29 that defines the side end of the opening region 27. The lower end surface 28 is a horizontal surface facing downward, and the side end surface 29 is a vertical surface facing laterally. The lower end surface 28 and the side end surface 29 form a right angle with each other. In detail, the outer wall surface portion 25 has a first wall surface portion 25a provided above the lower roof portion 18 (the upper end portion), and a second wall surface portion 25b that is continuous with the first wall surface portion 25a in the wall width direction and extends downward beyond the upper end portion of the lower roof portion 18. The lower end surface 28 is formed by the first wall surface portion 25a, and the side end surface 29 is formed by the second wall surface portion 25b. The lower end surface 28 corresponds to the first end surface, and the side end surface 29 corresponds to the second end surface.

[0028] Next, the configuration of the eaves section 18 will be described with reference to Figures 2 and 3. Figure 2 is a perspective view showing the vicinity of the boundary between the roof panel 30 constituting the eaves section 18 and the exterior wall surface section 25. Figure 3 is a perspective view showing the waterproof structure around the boundary between the eaves section 18 and the exterior wall surface section 25. Note that both Figures 2 and 3 show the gable 19 side of the eaves section 18.

[0029] As shown in Fig. 2, the lower eaves portion 18 has a roof panel 30 which constitutes the lower eaves portion 18. The roof panel 30 has a sheathing board 31 and a roof frame 32 provided on the underside of the sheathing board 31. The roof frame 32 is formed by assembling steel frame materials into a rectangular frame shape, and the sheathing board 31 is placed on and fixed to the roof frame 32. The roof panel 30 is installed on the building units 15 which constitute the first floor overhang 16. The roof panel 30 is manufactured in advance in a manufacturing factory and is installed on the building units 15 at the construction site.

[0030] As shown in Fig. 3, an underlayment 35 is laid on the sheathing board 31 of the roof panel 30. The underlayment 35 is formed of, for example, asphalt roofing. A roofing material 36 is laid on the underlayment 35. The roofing material 36 is formed of, for example, slate tiles. The roof surface of the lower roof portion 18 is formed by the roofing material 36.

[0031] A climbing tree 38 is provided on the roof panel 30, extending along the gable 19. The climbing tree 38 is made of a wooden block and placed on the underlayment 35. The climbing tree 38 is fixed to the sheathing board 31 via the underlayment 35.

[0032] A gable water-repellent material 39 that extends along the gable 19 is attached to the climbing beam 38. The gable water-repellent material 39 is formed from a metal plate material so as to cover the climbing beam 38. The gable water-repellent material 39 has an upper plate portion 41 that covers the upper surface of the climbing beam 38, and a pair of side plate portions 42, 43 that extend downward from both ends of the upper plate portion 41 in the width direction and cover both side surfaces of the climbing beam 38.

[0033] Of the side panels 42, 43, the outer side panel 42 serves as a drip edge that is placed on the side of the roof panel 30. The lower portion of the inner side panel 43 is recessed toward the climbing beam 38 relative to the upper portion. The gable drip edge material 39 further has an extension panel 44 that extends from the lower end of the side panel 43 (lower portion) to the side opposite the climbing beam 38. The extension panel 44 is placed on the underlayment 35, and the end of the roof material 36 is placed on this extension panel 44.

[0034] One longitudinal end (upper end) of the girder flashing material 39 enters the end on the side end face 29 side of the exterior wall surface portion 25 in the opening region 27. The one end of the girder flashing material 39 abuts against the side end face 29 of the exterior wall surface portion 25. In more detail, the girder flashing material 39 has a part of the outer side in the width direction cut out at the one end, thereby forming a protruding portion on the inner side in the width direction. The protruding portion enters the opening region 27 and abuts against the side end face 29. In other words, the girder flashing material 39 is arranged with the two faces forming the cutout portion abutting against the outdoor side face and the side end face 29 of the exterior wall surface portion 25, respectively.

[0035] Next, the waterproof structure at the boundary between the eaves portion 18 and the exterior wall surface portion 25 will be described.

[0036] As described above, the underlayment material 35 is laid on the sheathing board 31 of the roof panel 30, and its end on the exterior wall portion 21 side is raised upward. The raised raised portion 35a is fixed to the base frame 24. The base frame 24 has, as the frame material 26, a lower end frame material 26a that extends along the lower end face 28 of the exterior wall surface portion 25 (see FIG. 2). A part of the lower end frame material 26a protrudes downward from the lower end face 28, and an upper part of the raised portion 35a is fixed to the protruding portion.

[0037] More specifically, on the opposite side of the lower-end frame material 26a (more specifically, the protruding portion) across the upper portion of the rising portion 35a, a base material 46 made of a long wooden board extending in the same direction as the lower-end frame material 26a is provided. The base material 46 is fixed to the lower-end frame material 26a via the rising portion 35a with screws or the like. As a result, the rising portion 35a is fixed in a state where it is sandwiched between the lower-end frame material 26a and the base material 46.

[0038] An upper portion of a waterproof sheet 48 is sandwiched and fixed between the exterior wall surface portion 25 and the lower end frame material 26a. The waterproof sheet 48 is formed in an elongated shape extending along the lower end surface 28 of the exterior wall surface portion 25, with its lower portion hanging down below the lower end surface 28. The waterproof sheet 48 is sandwiched and fixed between the exterior wall surface material 23 (exterior wall surface portion 25) and the lower end frame material 26a in advance at the manufacturing factory.

[0039] A flashing material 50 is provided on the outdoor side of the rising portion 35a of the underlayment material 35. The flashing material 50 is formed in an elongated shape extending along the boundary between the eaves portion 18 and the exterior wall surface portion 25. The flashing material 50 is provided so as to straddle the exterior wall surface portion 25 and the eaves portion 18, and covers the opening area 27. This prevents rainwater from entering the indoor side through the opening area 27.

[0040] The flashing material 50 is formed of a metal plate material, and its cross-sectional shape is the same throughout the entire length. The flashing material 50 has a rising portion 51 extending vertically in the opening area 27, and a base portion 52 extending from the lower end of the rising portion 51 onto the eaves portion 18. The rising portion 51 is fixed to the outdoor side of the base material 46 with screws or the like. In addition, the lower portion of the waterproof sheet 48 hangs down from the outdoor side of the rising portion 51. As a result, water flowing down from the exterior wall surface portion 25 is guided to the outdoor side of the flashing material 50 along the waterproof sheet 48. Although not shown in the figure, a water drainage material is further provided on the outdoor side of the waterproof sheet 48, and the waterproof sheet 48 is covered and hidden from the outdoor side by the water drainage material.

[0041] A capping board 55 is provided below the base portion 52. The capping board 55 is placed on the underlayment material 35 and extends along the base portion 52. The base portion 52 is fixed to the capping board 55 with screws or the like. In addition, the portion of the base portion 52 that extends beyond the capping board 55 toward the outdoors is bent downward and placed on the roof material 36.

[0042] Here, in this embodiment, as described above, since the end of the gable flashing material 39 enters the end of the side end surface 29 side in the opening area 27, it is considered that the fitting between the end of the gable flashing material 39 and the end of the flashing material 50 becomes a problem. Therefore, in this embodiment, a characteristic configuration is provided to solve such a fitting problem. The characteristic configuration will be described below with reference to FIG. 3, as well as FIG. 4 and FIG. 5. FIG. 4 is a perspective view showing the short-length feature 60 and the flashing material 50. In FIG. 4, the flashing material 50 is shown by a virtual line (two-dot chain line) for convenience of explanation. Also, FIG. 5 is a front view showing an enlarged view of the periphery of the short-length feature 60. In FIG. 5, the waterproof sheet 48 is omitted for convenience. In addition, in FIG. 3 and FIG. 4, the sealing material 75 (details will be described later) filled in the peripheral portion of the short-length feature 60 is omitted for convenience.

[0043] As shown in Figures 3 to 5, a short accessory 60 is provided at the end of the opening area 27 on the side end surface 29 side. The short accessory 60 is formed in a rectangular shape from a metal plate material, more specifically, in a substantially square shape. The short accessory 60 is disposed so as to cover the area between the upper surface of the gable water-repelling material 39 in the opening area 27 and the lower end surface 28 of the outer wall surface portion 25.

[0044] The short-length accessory 60 has a vertical dimension that is approximately the same as the distance between the upper surface and the lower end surface 28 of the gable water cutter 39, and more specifically, is slightly smaller than the above distance. The short-length accessory 60 is disposed between the upper surface and the lower end surface 28 of the gable water cutter 39 in the opening area 27. In this arrangement, the upper edge portion 61 of the short-length accessory 60 is along the lower end surface 28, the side edge portion 62 (more specifically, the side edge portion 62 on the side end surface 29 side) is along the side end surface 29, and the lower edge portion 63 is along the upper surface of the gable water cutter 39. More specifically, the upper edge portion 61 of the short-length accessory 60 abuts against the lower end surface 28, and the side edge portion 62 abuts against the side end surface 29. Therefore, the short-length accessory 60 is disposed in a state where the corner between the upper edge portion 61 and the side edge portion 62 is aligned with the corner between the lower end surface 28 and the side end surface 29. In addition, in this arrangement, the short feature 60 is fixed to the outdoor side surface of the base material 46 with screws or the like. The upper edge 61 corresponds to the first edge, the side edge 62 corresponds to the second edge, and the lower edge 63 corresponds to the third edge.

[0045] In the above-mentioned arrangement, the short accessory 60 extends beyond the gable flashing 39 toward the opposite side from the side end surface 29. The flashing 50 is arranged on the outdoor side of this extended portion 65. The flashing 50 is arranged with its rising portion 51 overlapping the outdoor side of the extended portion 65. Although not shown, a sealing material is interposed between the extended portion 65 and the flashing 50, thereby preventing rainwater from entering between the extended portion 65 and the flashing 50. The flashing 50 is arranged with its longitudinal end abutting the inner surface of the gable flashing 39 (specifically, the outer surface of the side plate portion 43).

[0046] The short-length accessory 60 has recessed portions 66-68 on the upper side 61, the side 62, and the lower side 63, which are recessed toward the indoor side. Each of these recessed portions 66-68 is formed in an L-shape by bending each side 61-63 of the short-length accessory 60 in a step toward the indoor side. Of the recessed portions 66-68, the recessed portion 66 on the upper side 61 extends along the upper side 61, the recessed portion 67 on the side 62 extends along the side 62, and the recessed portion 68 on the lower side 63 extends along the lower side 63. The recessed portions 66-68 are continuous with each other and extend to form a U-shape as a whole. The recessed portion 66 corresponds to the second recessed portion, the recessed portion 67 corresponds to the first recessed portion, and the recessed portion 68 corresponds to the third recessed portion.

[0047] The recessed portion 66 on the upper side 61 side forms a groove-shaped seal filling portion 71 together with the lower end surface 28 of the outer wall surface portion 25. The recessed portion 67 on the side side 62 side forms a groove-shaped seal filling portion 72 together with the side end surface 29 of the outer wall surface portion 25. The recessed portion 68 on the lower side 63 side forms a groove-shaped seal filling portion 73 together with the upper surface of the gable flashing material 39. Each of these seal filling portions 71 to 73 can be filled with sealing material 75.

[0048] The seal filling parts 71-73 are continuous with each other and extend in a U-shape. A sealant 75 is filled in each seal filling part 71-73. The sealant 75 is an indefinite sealant, for example, a silicone sealant. The sealant 75 is continuously filled in each seal filling part 71-73. The sealant 75 is filled in the range of the seal filling parts 71-73 formed between the flashing 50 and the side end surface 29 of the outer wall surface part 25, in other words, in the range not covered by the flashing 50 from the outdoor side. In other words, the sealant 75 is filled over the entire area of ​​each seal filling part 72, 73, and is filled only in the range between the flashing 50 and the side end surface 29 of the seal filling part 71. This creates a seal between the flashing material 50 and the side end face 29, between the short-length accessory 60 and the exterior wall surface portion 25, and also between the short-length accessory 60 and the gable drip-proof material 39.

[0049] In the overlapping portion of the extension portion 65 of the short feature 60 where the flashing material 50 overlaps, a waterproofing material 77 made of a sponge material is provided in the recessed portion 68. The waterproofing material 77 is provided so as to close the recessed portion 68. The waterproofing material 77 is provided in the recessed portion 68 so as to be continuous with the sealing material 75 filled in the recessed portion 68. This reliably prevents rainwater from entering through the recessed portion 68.

[0050] In addition, the rising portion 51 of the flashing material 50 has an upper end recess 51a recessed toward the indoor side. The upper end recess 51a has a recessed shape corresponding to the recessed portion 66 of the short feature 60, and is disposed in a state overlapping the recessed portion 66. This reliably prevents rainwater from entering through the recessed portion 66.

[0051] Next, the work procedure for constructing a waterproof structure at the boundary between the eaves portion 18 and the exterior wall surface portion 25 will be described.

[0052] First, each building unit 15 is manufactured in a manufacturing factory, and the roof panel 30 is also manufactured. Then, each manufactured building unit 15 and roof panel 30 are transported to the construction site by truck or the like. At the construction site, first, each building unit 15 is installed at a predetermined installation position and connected to each other to construct the building main body 13. Then, the roof panel 30 is installed on the building units 15 that constitute the first floor overhang 16. As a result, an exterior wall surface portion 25 is formed, and an opening area 27 is formed between the exterior wall surface portion 25 and the roof panel 30.

[0053] Next, a shed formation process is performed in which various roof components are provided on the roof panel 30 to form the shed section 18. In this process, first, underlayment material 35 is laid on the sheathing boards 31 of the roof panel 30. Then, climbing beams 38 are installed on the underlayment material 35 along the gable 19, and gable drip-proofing material 39 is attached to the installed climbing beams 38. Then, roof material 36 is installed on top of the underlayment material 35.

[0054] Next, a short-length accessory installation process is performed to install the short-length accessory 60. In this process, the short-length accessory 60 is installed so as to cover the area between the upper surface of the gable water-repelling material 39 in the opening area 27 and the lower end surface 28 of the outer wall surface portion 25. In detail, in this process, the short-length accessory 60 is arranged with the upper edge portion 61 and the side edge portion 62 of the short-length accessory 60 abutting against the lower end surface 28 and the side end surface 29 of the outer wall surface portion 25, respectively, and the short-length accessory 60 is fixed to the base material 46 in this arranged state.

[0055] Next, a flashing installation process is performed to install the flashing material 50. Note that, prior to this process, the coping 55 is installed on the underlayment material 35 in advance. In the flashing installation process, the flashing material 50 is installed with its longitudinal end abutting against the inner surface of the gable drip-proofing material 39. During this installation, the flashing material 50 is installed in a state where it is overlapped on the extension portion 65 of the short-length accessory 60 from the outdoor side. Then, the flashing material 50 is fixed to the coping 55 and the base material 46, respectively. Also, a waterproof material 77 is disposed in the recessed portion 68 of the extension portion 65 of the short-length accessory 60.

[0056] Next, a sealing process is performed in which the sealant 75 is filled into the seal filling parts 71-73 of the short accessory 60. In this process, the sealant 75 is filled into the areas of the seal filling parts 71-73 that are not covered from the outdoor side by the flashing material 50. This completes a series of waterproofing processes at the boundary between the eaves part 18 and the exterior wall surface part 25.

[0057] According to the configuration of this embodiment described in detail above, the following excellent effects can be obtained.

[0058] In the configuration in which the end of the gable water-repelling material 39 is inserted into the end on the side end face 29 side in the opening region 27 between the exterior wall surface portion 25 and the eaves portion 18, a short-length accessory 60 is provided to cover the area between the upper surface of the gable water-repelling material 39 in the opening region 27 and the lower end face 28 of the exterior wall surface portion 25. In this case, since the short-length accessory 60 is short, it is easy to handle and can be easily installed. In addition, the short-length accessory 60 extends beyond the gable water-repelling material 39 toward the opposite side to the side end face 29 side of the exterior wall surface portion 25. The rain flashing material 50 is provided overlapping the extending portion 65 of the short-length accessory 60 with its longitudinal end abutting against the side (more specifically, the inner side) of the gable water-repelling material 39. As a result, the rain flashing material 50 can cover the opposite side end face 29 side of the gable water-repelling material 39 in the opening region 27. In addition, in this case, when installing the flashing 50, the end of the flashing 50 can be placed against the side of the gable flashing 39, which makes the installation easy and eliminates the need to process the end of the flashing 50. This makes it possible to simplify the construction work.

[0059] The flashing material 50 is provided overlapping the extension portion 65 of the short accessory 60 from the outdoor side. In this case, when installing the flashing material 50, the short accessory 60 is first attached, and then the flashing material 50 can be installed while being placed against the extension portion 65 of the short accessory 60 from the outdoor side. This makes the construction work even easier.

[0060] In the short feature 60, the side edge portion 62 arranged along the side end surface 29 of the outer wall surface portion 25 is recessed toward the indoor side, so that the side edge portion 62 is made into a recessed portion 67 that forms a groove-shaped seal filling portion 72 together with the side end surface 29. This makes it possible to seal between the side end surface 29 and the short feature 60 by filling the seal filling portion 72 with a sealant 75. In this case, the seal processing portion is clearly defined, so reliable waterproofing can be performed.

[0061] In the short-length accessory 60, the upper edge portion 61 side arranged along the lower end surface 28 of the outer wall surface portion 25 is recessed toward the indoor side, so that the upper edge portion 61 side is a recessed portion 66 that forms a groove-shaped seal filling portion 71 together with the lower end surface 28. This allows the seal filling portion 71 to be filled with a sealant 75 to seal between the lower end surface 28 and the short-length accessory 60. In addition, since the recessed portion 66 is formed continuously with the recessed portion 67, the seal filling portions 71, 72 formed by the respective recessed portions 66, 67 can be made continuous with each other. Therefore, the seal filling portions 71, 72 can be filled with the sealant 75 continuously, and more reliable waterproofing can be performed.

[0062] In the short-length accessory 60, the lower side 63 side arranged along the upper surface of the gable water-repelling material 39 is recessed toward the indoor side, so that the lower side 63 side is a recessed portion 68 that forms a groove-shaped seal filling portion 73 together with the upper surface of the gable water-repelling material 39. This allows the gable water-repelling material 39 and the short-length accessory 60 to be sealed by filling the seal filling portion 73 with a sealant 75. In addition, since the recessed portion 68 is formed continuously with the recessed portion 67, in this case, each of the recessed portions 66 to 68 is formed continuously in a U-shape. This allows the seal filling portions 71 to 73 formed by each of the recessed portions 66 to 68 to be continuous with each other, so that the seal filling portions 71 to 73 can be filled with the sealant 75 continuously. This allows for more reliable waterproofing.

[0063] The present invention is not limited to the above embodiment, and may be implemented, for example, as follows.

[0064] (1) In the above embodiment, the seal filling parts 71-73 are formed across three sides of the short-length special feature 60 by providing the concave parts 66-68 on the upper side 61 side, the side side 62 side, and the lower side 63 side of the short-length special feature 60, respectively. However, for example, only two of the concave parts 66-68 of the short-length special feature 60 may be provided, thereby forming a seal filling part only on two sides of the short-length special feature 60. Also, only one of the concave parts 66-68 of the short-length special feature 60 may be provided, thereby forming a seal filling part only on one side of the short-length special feature 60. When forming a seal filling part only on one side of the short-length special feature 60, it is desirable to provide only the concave part 67 on the side side 62 side, which has the longest seal length.

[0065] It is not necessary to provide concave portions on all three sides of the short part 60. In this case, the short part 60 may be formed in a rectangular flat plate shape.

[0066] (2) In the above embodiment, the flashing material 50 is provided overlapping the outdoor side of the extension part 65 of the short-length accessory 60, but this may be reversed and the flashing material 50 may be provided overlapping the indoor side of the extension part 65 of the short-length accessory 60. In such a configuration, the flashing material 50 is first installed during construction, and then the short-length accessory 60 is installed. Specifically, the flashing material 50 is first installed with its end abutting against the side of the gable flashing material 39. In this installed state, the side end face 29 side of the flashing material 50 in the opening area 27 is opened. In other words, in this case, the space between the upper surface of the gable flashing material 39 in the opening area 27 and the lower end face 28 of the exterior wall surface portion 25 is opened.

[0067] Next, the short accessory 60 is installed so as to cover the opening between the upper surface and the lower end surface 28 of the gable flashing material 39. During this installation, the short accessory 60 is installed so as to overlap the outdoor side of the flashing material 50. This results in the extension portion 65 of the short accessory 60 being overlapped on the outdoor side of the flashing material 50. Even when construction is performed in this order, the installation work of the flashing material 50 and the short accessory 60 can be easily performed, making the construction work easier.

[0068] (3) In the above embodiment, an example of application to a modular building has been described. However, the waterproof structure of the present invention may also be applied to buildings of other structures, such as buildings constructed using a steel frame construction method. [Explanation of symbols]

[0069] 10...building, 18...chamber, 19...gables, 23...exterior wall surface material, 25...exterior wall surface portion, 27...opening area, 28...lower end face as first end face, 29...side end face as second end face, 39...gables dripping material, 50...rain guttering material, 60...short accessory, 61...upper edge portion as first edge portion, 62...side edge portion as second edge portion, 63...lower edge portion as third edge portion, 65...extending portion, 66...concave portion as second concave portion, 67...concave portion as first concave portion, 68...concave portion as third concave portion, 71-73...sealing filling portion, 75...sealing material.

Claims

1. An exterior wall surface portion formed by arranging a plurality of exterior wall surface materials side by side; A shed portion extending downwardly on a side away from the outer wall surface portion, At the boundary between the outer wall surface portion and the eaves portion, an opening area between the two has a predetermined vertical width and extends along the boundary, The outer wall surface portion is formed with a first end surface that defines an upper end portion of the opening region, and a second end surface that is perpendicular to the first end surface and defines a side end portion of the opening region, A gable water drainage material is provided on the top of the eaves, extending along the eaves of the eaves, The end of the gable flashing material is applied to a building in which the end of the gable flashing material enters the end of the second end face side in the opening area, A waterproof structure for a building comprising a rain guttering material that is elongated and extends along the boundary portion and covers the opening area, A short accessory is provided to cover the area between the upper surface of the gable water-repellent material and the first end surface in the opening area, The short accessory has an extension portion extending beyond the gable water cutting material toward the opposite side to the second end surface side, The rain flashing material is provided on the extension portion from the outdoor side with its longitudinal end abutting against the side surface of the gable flashing material, The short accessory is formed in a rectangular plate shape and has a first side portion arranged along the first end face, a second side portion arranged along the second end face, and a third side portion arranged along the upper surface of the gable flashing material, A waterproof structure for a building, wherein the second side of the short feature is recessed toward the indoor side to form a first recessed portion which, together with the second end face, forms a groove-shaped sealing filling portion into which sealing material is filled.

2. The first side of the short feature is recessed toward the indoor side to form a second recessed portion that, together with the first end surface, forms a groove-shaped seal filling portion into which a sealant is filled, The waterproof structure for a building according to claim 1 , wherein the second recessed portion is formed continuously with the first recessed portion.

3. The third side of the short accessory is recessed toward the indoor side to form a third recessed portion that, together with the upper surface of the gable flashing material, forms a groove-shaped seal filling portion into which a sealant is filled, The waterproof structure for a building according to claim 2 , wherein the third recessed portion is formed continuously with the first recessed portion.

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