Construction method of roof structure

Abstract

To provide a construction method of a roof structure which can surely prevent flooding while capable of adjusting the length in an eaves ridge direction of a tile body part.SOLUTION: A construction method of a roof structure having a plurality of tile materials 10 provided on a roof substrate 4 in a state of being aligned in an eaves ridge direction D1 includes: cutting one of the plurality of tile materials 10 into an eaves side part 12A including an eaves side end 14b and a ridge side part 12B including a ridge side end 14c; bonding the two parts 12A and 12B in the superposed manner and forming a shortened tile material 12; arranging the tile materials on the roof substrate 4, in a state in which the eaves side end 14b of the ridge side tile material arranged on the ridge side is superposed from above on a ridge side end 14c of the eaves side tile material arranged on the eaves side among second tile materials as another one among the shortened tile material 12 and the plurality of tile materials 10; and forming a pair of adhesive parts 12Q bonded so as to close a gap in the overlapped part of the eaves side part 12A and the ridge side part 12B, when the shortened tile material 12 is formed, in such a manner to be separated from each other in the eaves ridge direction D1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for constructing a roof structure. [Background technology]

[0002] A roof structure has been known that includes a roof underlayment and a plurality of roof tiles arranged on the roof underlayment in a line along the eaves-ridge direction connecting the eaves and the ridge. In this roof structure, each roof tile has a tile body, an eave-side end portion located on the eaves side of the tile body, and a ridge-side end portion located on the ridge side of the tile body. Furthermore, of two roof tiles adjacent to each other in the eaves-ridge direction, the eave-side end portion of the ridge-side roof tile located on the ridge side is arranged so as to overlap from above with the ridge-side end portion of the eave-side roof tile located on the eaves side of the two roof tiles.

[0003] In the above roof structure, the eaves and ridge ends of each tile are required to be common to all tile members, as they function to be aligned with other tile members. On the other hand, the tile body of each tile member may be required to have a different length in the eaves-ridge direction (working length) depending on the specifications of the roof structure.

[0004] Therefore, as described in Patent Document 1, for example, a roof construction method is known that allows adjustment of the working dimension (length dimension in the eaves-ridge direction) of existing metal tiles.

[0005] Specifically, in the construction method described in Patent Document 1, the tile body of an existing metal tile is divided into an eave end portion and a ridge end portion, and the divided end portion on the eave end portion and the divided end portion on the ridge end portion are overlapped with each other and then glued together. This makes it possible to create a metal tile with a working dimension that is shorter than the working dimension of existing metal tiles. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-2617 Summary of the Invention [Problem to be solved by the invention]

[0007] Patent Document 1 does not specifically describe how to bond the divided end portion on the eaves side to the divided end portion on the ridge side. Therefore, depending on the bonding method, there is a risk that water may penetrate into the roof underlayment through the gap between the divided end portion on the eaves side and the divided end portion on the ridge side.

[0008] An object of the present invention is to provide a method for constructing a roof structure that can reliably prevent water intrusion while allowing adjustment of the length of the tile body in the eaves-ridge direction. [Means for solving the problem]

[0009] In order to solve the above problems, a first invention is a construction method for a roof structure having a roof underlayment and a plurality of roof tile materials arranged on the roof underlayment in an eaves-ridge direction connecting the eaves and the ridge, each of the plurality of roof tile materials having a tile main body portion, an eave side end portion located on the eave side of the tile main body portion, and a ridge side end portion located on the ridge side of the tile main body portion, the method comprising: preparing a first roof tile material that is one of the plurality of roof tile materials; cutting the tile main body portion of the first roof tile material so as to separate it into an eave side portion including the eave side end portion and a ridge side portion including the ridge side end portion; a second tile material that is one of the plurality of tile materials, and arranges the shortened tile material and the second tile material on the roof substrate so that the ridge-side end of the eaves-side tile material that is located on the ridge side of the shortened tile material and the second tile material overlaps from above with the ridge-side end of the eaves-side tile material that is located on the ridge side of the shortened tile material and the second tile material, and when forming the shortened tile material, a pair of adhesive parts that are spaced apart from each other in the eaves-ridge direction are formed to bond the eaves-side part and the ridge-side part together so as to close the gap between the eaves-side part and the ridge-side part at the overlapping part where the eaves-side part and the ridge-side part overlap each other.

[0010] According to the roof structure construction method of the first invention, a pair of adhesive joints are formed spaced apart from each other in the eaves-ridge direction, so even if tiny holes that allow water to penetrate are formed in the first adhesive joint located on the ridge side of the pair of adhesive joints, the pressure is reduced in the space located on the eaves side of the first adhesive joint, preventing further water penetration into the second adhesive joint.

[0011] In the second invention, when forming the shortened tile material in the first invention, it is preferable to form the pair of adhesive portions on the underside of the eaves side portion while overlapping the eaves side portion with the ridge side portion positioned on top and the ridge side portion positioned below.

[0012] According to the second aspect of the invention, the eaves-side portion is positioned above and the ridge-side portion is positioned below, and the boundary (gap) between the ridge-side portion and the eaves-side portion is open toward the ridge. Therefore, unlike when the boundary is open toward the eaves, it is possible to prevent the upward force of wind from acting to cause water to seep into the gap between the ridge-side portion and the eaves-side portion through the boundary.

[0013] In addition, the pair of adhesive joints can be covered by the eaves side portion, further improving the waterproofing performance.

[0014] The third invention is the second invention, wherein the ridge side end of each tile material has a base portion extending from the tile main body portion along the tile main body portion toward the ridge side, a rising portion rising upward from the base, and a covering portion extending from the upper end of the rising portion toward the eaves side so as to cover the base from above, and when forming the shortened tile material, it is preferable to join the eaves side portion and the ridge side portion so that the end of the eaves side portion facing the ridge is positioned between the base and the covering portion.

[0015] According to the third aspect of the present invention, the end of the eaves side portion facing the ridge is disposed between the base and the covering portion, so that the end of the eaves side portion facing the ridge, i.e., the boundary between the ridge side portion and the eaves side portion, can be covered with the covering portion, thereby more effectively preventing the infiltration of rainwater and the like through the boundary.

[0016] The fourth invention is any one of the first to third inventions, wherein when cutting the tile main body portion, the tile main body portion is cut so that the eaves side portion is longer in the eaves-ridge direction than the ridge side portion, and when forming the shortened tile material, it is preferable to join the eaves side portion and the ridge side portion in a state in which the eaves side portion is positioned at the ridge side portion by abutting the ridge side end of the eaves side portion against the rising portion of the ridge side portion.

[0017] According to the fourth aspect of the present invention, the eaves-side portion can be positioned on the ridge-side portion by abutting the ridge-side end of the eaves-side portion against the rising portion of the ridge-side portion, which results in higher work efficiency than when joining the eaves-side portion and the ridge-side portion while adjusting the overlapping range between them so that the total length of the shortened roofing tile is the target length.

[0018] The fifth invention is that in the third or fourth invention, when forming the shortened tile material, it is preferable that, as the pair of adhesive portions, an adhesive layer is provided between the underside of the terminal facing the ridge of the eaves side portion and the upper surface of the base of the ridge side portion, and adhesive tape is provided from the underside of the terminal facing the eaves of the ridge side portion to the underside of the eaves side portion.

[0019] According to the fifth invention, by providing an adhesive layer between the end facing the ridge of the eaves side portion, which is the entrance for rainwater, etc., and the base, it is possible to efficiently prevent water from entering between the eaves side portion and the ridge side portion.

[0020] In addition, the gap between the end of the ridge side portion facing the eaves and the underside of the eaves side portion, which serves as an exit for water when water seeps in between the eaves side portion and the ridge side portion, can be sealed with adhesive tape.

[0021] A sixth invention is any one of the first to fifth inventions, wherein each of the tile materials has a first engagement portion extending from one end of the tile main body portion in a horizontal direction perpendicular to the eaves-ridge direction to the other side in the horizontal direction along the upper surface of the tile main body portion, and a second engagement portion extending from the other end of the tile main body portion in the horizontal direction to one side along the lower surface of the tile main body portion, and when cutting the tile main body portion, the first engagement portion and the second engagement portion are respectively separated into an eave side piece belonging to the eaves side portion and a ridge side piece belonging to the ridge side portion, and the construction method of the roof structure preferably comprises separating the eave side piece or ridge side piece of the first engagement portion and the eave side piece or ridge side piece of the second engagement portion from the tile main body portion after cutting the tile main body portion and before forming the shortened tile material.

[0022] In some cases, first and second engagement parts are provided to engage tiles that are adjacent to each other in the horizontal direction. In this case, when the tile body is cut, the eave side pieces of the first and second engagement parts and the ridge side pieces of the first and second engagement parts remain on the eave side and ridge side parts, respectively. However, if the eave side and ridge side parts are overlapped as they are, the two eave side pieces and the two ridge side pieces will overlap, making it difficult for tiles that are adjacent to each other in the horizontal direction to engage with each other.

[0023] In contrast, according to the sixth invention, by leaving only one of the eaves side pieces or ridge side pieces for each of the first engagement portion and the second engagement portion, it becomes possible to use that one of the eaves side pieces or ridge side pieces to engage with adjacent tile material.

[0024] A seventh invention is any one of the first to third inventions, wherein each of the tile materials has a first engagement portion extending from one end of the tile main body portion in a horizontal direction perpendicular to the eaves-ridge direction to the other side in the horizontal direction along the upper surface of the tile main body portion, and a second engagement portion extending from the other end of the tile main body portion in the horizontal direction to one side along the lower surface of the tile main body portion, and when cutting the tile main body portion, the tile main body portion is cut so that the eave side portion and the ridge side portion have different lengths in the eaves-ridge direction, and the first engagement portion and the second engagement portion are separated into an eave side piece belonging to the eave side portion and a ridge side piece belonging to the ridge side portion, respectively, and the construction method of the roof structure preferably includes, after cutting the tile main body portion and before forming the shortened tile material, separating the shorter of the eave side piece and ridge side piece of the first engagement portion and the shorter of the eave side piece and ridge side piece of the second engagement portion from the tile main body portion.

[0025] According to the seventh aspect of the present invention, the longer of the eaves-side or ridge-side pieces can be used as the engaging portion for the shortened roof tile, thereby ensuring a long engaging range in the eaves-ridge direction and ensuring reliable engagement of the shortened roof tile. [Effects of the Invention]

[0026] According to the present invention, it is possible to provide a construction method for a roof structure that can reliably prevent water intrusion while allowing adjustment of the length of the tile main body in the eaves-ridge direction. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a side view of a building having a roof structure to which a roof structure construction method according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is an enlarged view of the engaging portion between the roof tile members shown in FIG. [Figure 4] FIG. 4 is a plan view of the roof tile shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] Figure 7 is a cross-sectional view of the part corresponding to Figure 5, showing the process of forming the shortened tile material, where (a) shows the state in which the tile material has been cut into the eaves side portion and the ridge side portion, and (b) shows the completed state of the shortened tile material. [Figure 8] FIG. 8 is a plan view showing the roof tile cut into an eaves side portion and a ridge side portion. DETAILED DESCRIPTION OF THE INVENTION

[0028] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention with reference to the accompanying drawings. Note that the following embodiments are examples that embody the present invention and are not intended to limit the technical scope of the present invention.

[0029] FIG. 1 is a side view of a building having a roof structure to which the roof structure construction method according to this embodiment is applied. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is an enlarged view of the engaging portion between the roof tiles in FIG. 2. FIG. 4 is a plan view of the roof tile shown in FIG. 2. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 4. FIG. 7 is a cross-sectional view of a portion corresponding to FIG. 5 showing the process of forming a shortened roof tile, where (a) shows the roof tile after it has been cut into an eave side portion and a ridge side portion, and (b) shows the shortened roof tile after it has been completed. FIG. 8 is a plan view showing the roof tile after it has been cut into an eave side portion and a ridge side portion.

[0030] As shown in Figures 1 and 2, building 1 has a building body 2 including a skeleton, and a roof structure 3 provided on the building body 2. Roof structure 3 has a roof underlayment 4 and a plurality of roof tile materials 10 provided on the roof underlayment 4 in a line along the eaves-ridge direction connecting the eaves and the ridge.

[0031] In the following description, the eaves-ridge direction is referred to as the first direction D1, and the horizontal direction perpendicular to the eaves-ridge direction is referred to as the second direction D2. Furthermore, the direction perpendicular to both the first direction D1 and the second direction D2 is referred to as the third direction D3. Of the first direction D1, the upward direction (toward the ridge) is referred to as the +D1 direction, and the downward direction (toward the eaves) is referred to as the -D1 direction. Furthermore, of the second direction D2, the right direction in Figure 1 is referred to as the +D2 direction, and the left direction is referred to as the -D2 direction. Of the third direction D3, the downward direction in Figure 2 is referred to as the +D3 direction, and the upward direction is referred to as the -D3 direction.

[0032] As shown in Figure 2, the roof underlayment 4 has rafters 4a fixed to the beams 2a that constitute the main body and extending in a first direction D1, purlins 4b extending in a second direction D2 and attached to the rafters 4a while protruding upward from the rafters 4a, and sheathing boards 4c provided on the purlins 4b.

[0033] The multiple roof tile members 10 are arranged on the sheathing board 4c in a state of being lined up in the first direction D1 and the second direction D2. Specifically, the multiple roof tile members 10 include multiple shortened roof tile members 12 (eaves-side roof tile members) arranged in the second direction D2 on the eaves side (-D1 direction side) and multiple roof tile members 14 (ridge-side roof tile members) arranged in the first direction D1 and the second direction D2 on the ridge side (+D1 direction side) of the shortened roof tile members 12. The shortened roof tile members 12 are formed by processing the roof tile members 14 as described below, and have a length dimension shorter than that of the roof tile members 14. The arrangement of the shortened roof tile members 12 is not limited to the above arrangement. For example, the shortened roof tile members 12 may be arranged on the ridge side (+D1 direction side) of the roof tile members 14.

[0034] Each roof tile 14 has a roof tile body 14a extending in the first direction D1 and the second direction along the sheathing board 4c, an eave-side end 14b located on the eave side (-D1 direction side) of the roof tile body 14a, and a ridge-side end 14c located on the ridge side (+D1 direction side) of the roof tile body 14a. Of the multiple roof tile materials 10, the ridge-side end 14c of the roof tile material 10 located on the eave side and the eave-side end 14b of the roof tile material 10 located on the ridge side are configured to be engageable with each other.

[0035] Specifically, the eaves side end 14b has an eaves side base 14b1 extending from the tile main body 14a along the tile main body 14a toward the eaves side (-D1 direction), a downward extension 14b2 extending from the -D1 direction end of the eaves side base 14b1 in the +D3 direction, and a bottom turn portion 14b3 extending from the lower end of the downward extension 14b2 toward the ridge side (+D1 direction). The ridge-side end 14c has a ridge-side base 14c1 (base) extending from the tile body 14a toward the ridge side (in the +D1 direction) along the tile body 14a, a rising portion 14c2 rising upward from the end of the ridge-side base 14c1 in the +D1 direction, i.e., extending in the -D3 direction, and a covering portion 14c3 extending from the upper end of the rising portion 14c2 toward the eaves side (in the -D1 direction) so as to cover the ridge-side base 14c1 from above. The bottom-turned portion 14b3 of the eaves-side end 14b is inserted between the ridge-side base 14c1 and the covering portion 14c3 of the ridge-side end 14c, so that roof tile materials 10 adjacent to each other in the first direction D1 can engage with each other.

[0036] 3, the roof structure 3 further includes a roof tile fastener 10a for fastening the roof tile 10 to the sheathing board 4c using the ridge-side end 14c, and a screw 10b for fastening the roof tile fastener 10a to the sheathing board 4c. The roof tile fastener 10a includes an engaging portion 10a1 that engages with the ridge-side end 14c and a fixed portion 10a2 that is connected to the engaging portion 10a1 and fixed to the sheathing board 4c. The engaging portion 10a1 includes an upper portion 10a3 that extends along the upper surface of the covering portion 14c3, and a claw portion 10a5 that extends in the +D1 direction from the -D1-direction end of the upper portion 10a3 and is inserted between the covering portion 14c3 of the ridge-side end 14c and the ridge-side base portion 14c1. The fixed portion 10a2 has an inclined portion 10a4 extending from the upper portion 10a3 of the engaging portion 10a1 toward the sheathing subfloor 4c, and an extension portion 10a6 extending from the inclined portion 10a4 along the upper surface of the sheathing subfloor 4c. The screw 10b is driven into the sheathing subfloor 4c from above through a screw hole (not shown) formed in the extension portion 10a6.

[0037] 4 and 6, each roof tile material 14 has a configuration for engaging with an adjacent roof tile material 14 in the second direction D2. Specifically, each roof tile material 14 has a first engagement portion 14d extending from one end of the roof tile main body 14a in the second direction D2 (+D2 direction) to the other end of the roof tile main body 14a in the second direction D2 (-D2 direction) along the upper surface of the roof tile main body 14a, and a second engagement portion 14e extending from the end of the roof tile main body 14a in the -D2 direction to the +D2 direction along the lower surface of the roof tile main body 14a. The second engagement portion 14e of one of the two roof tile materials 14 adjacent to each other in the second direction D2 is inserted between the first engagement portion 14d and the roof tile main body 14a of the other roof tile material 14, thereby engaging the two roof tile materials 14 adjacent to each other in the second direction D2. In this embodiment, triangular wave-shaped irregularities extending in the first direction D1 are provided on the first engagement portion 14d and the portion of the roof tile main body 14a that faces the first engagement portion 14d.

[0038] The roof structure 3 having the shortened roof tile material 12 is constructed in the following procedure.

[0039] In the construction method for the roof structure 3 according to this embodiment, first, a roof tile material 14 is prepared as a first roof tile material, which is one of the plurality of roof tile materials 10.

[0040] Next, as shown in Figures 7(a) and 8, the tile main body portion 14a of the tile material 14 is cut so as to separate it into an eave side portion 12A including the eave side end portion 14b and a ridge side portion 12B including the ridge side end portion 14c.

[0041] Next, as shown in FIG. 7(b), the portion of the eaves-side portion 12A facing the ridge (+D1 direction) and the portion of the ridge-side portion 12B facing the eaves (-D1 direction) are overlapped with each other, and the eaves-side portion 12A and the ridge-side portion 12B are joined together to prepare the shortened roof tile 12. Specifically, a pair of adhesive portions 12Q that bond the eaves-side portion 12A and the ridge-side portion 12B are formed spaced apart from each other in the first direction D1 so as to close the gap G between the eaves-side portion 12A and the ridge-side portion 12B at the overlapping portion 12P where the eaves-side portion 12A and the ridge-side portion 12B overlap. This forms a space S between the pair of adhesive portions 12Q.

[0042] In this embodiment, the eaves side portion 12A and the ridge side portion 12B are overlapped with each other so that the eaves side portion 12A is positioned on top and the ridge side portion 12B is positioned on the bottom, and then a pair of adhesive portions 12Q are formed on the underside of the eaves side portion 12A. Specifically, the eaves side portion 12A and the ridge side portion 12B are joined so that the end of the eaves side portion 12A facing the ridge (+D1 direction) is positioned between the ridge-side base portion 14c1 and the covering portion 14c3.

[0043] Furthermore, when cutting the roof tile body 14a, the roof tile body 14a is cut so that the eaves side portion 12A is longer in the first direction D1 than the ridge side portion 12B, as shown in Figures 7(a) and 8. Furthermore, when forming the shortened roof tile material 12, as shown in Figure 7(b), the eaves side portion 12A and the ridge side portion 12B are joined in a state in which the eaves side portion 12A is positioned on the ridge side portion 12B by abutting the ridge side end of the eaves side portion 12A against the rising portion 14c2 of the ridge side portion 12B.

[0044] Furthermore, when forming the shortened tile material 12, an adhesive layer 12Q1 is provided as a pair of adhesive portions 12Q between the underside of the end facing the ridge of the eaves side portion 12A and the upper surface of the ridge side base 14c1 of the ridge side portion 12B, and an adhesive tape 12Q2 is provided from the underside of the end facing the eaves of the ridge side portion 12B (the end in the -D1 direction) to the underside of the eaves side portion 12A.

[0045] Furthermore, when cutting the roof tile main body 14a, the first engaging portion 14d and the second engaging portion 14e are divided into a first eave side piece 14dA and a second eave side piece 14eA belonging to the eave side portion 12A, and a first ridge side piece 14dB and a second ridge side piece 14eB belonging to the ridge side portion 12B, as shown in Fig. 8. Hereinafter, the "first eave side piece 14dA and the second eave side piece 14eA" will be collectively referred to as the eave side piece 14A, and the "first ridge side piece 14dB and the second ridge side piece 14eB" will be collectively referred to as the ridge side piece 14B.

[0046] In the construction method for the roof structure of this embodiment, after cutting the tile main body portion 14a, and before forming the shortened tile material 12, the first eave side piece 14dA or the first ridge side piece 14dB of the first engagement portion 14d and the second eave side piece 14eA or the second ridge side piece 14eB of the second engagement portion 14e are separated from the tile main body portion 14a.

[0047] Furthermore, when cutting the tile main body 14a, the tile main body 14a is cut so that the eaves side portion 12A and the ridge side portion 12B have different lengths in the first direction D1, and when separating the eaves side piece 14A or the ridge side piece 14B from the tile main body 14a, the shorter of the eaves side portion 12A and the ridge side portion 12B is separated from the tile main body 14a. In this embodiment, as described above, the tile main body 14a is cut so that the eaves side portion 12A is longer in the first direction D1 than the ridge side portion 12B, and therefore the shorter ridge side piece 14B is separated from the tile main body 14a.

[0048] Before or after the shortened roof tile material 12 is formed, a roof tile material 14 is prepared as a second roof tile material, which is one of the plurality of roof tile materials 10.

[0049] Then, the shortened tile material 12 and the second tile material are placed on the sheathing board 4c of the roof underlayment 4 in such a state that the ridge side end 14b of the ridge side tile material of the shortened tile material 12 or the second tile material that is placed on the ridge side overlaps from above with the ridge side end 14c of the eaves side tile material of the shortened tile material 12 or the second tile material that is placed on the ridge side. In this embodiment, of the shortened tile material 12 and the tile material 14 as the second tile material, the shortened tile material 12 is placed on the eaves side as the eaves side tile material, and the tile material 14 is placed on the ridge side as the ridge side tile material.

[0050] Specifically, the shortened roof tile 12, which is the eaves-side roof tile, is positioned on the sheathing board 4c. The engaging portion 10a1 of the roof tile fixture 10a is engaged with the ridge-side end 14c of the positioned shortened roof tile 12, and the fixed portion 10a2 is fixed to the sheathing board 4c with a screw 10b. Next, the roof tile 14, which is the ridge-side roof tile, is positioned on the sheathing board 4c with the eave-side end 14b of the roof tile 14 engaged with the ridge-side end 14c of the shortened roof tile 12 and the engaging portion 10a1 of the roof tile fixture 10a. The engaging portion 10a1 of the roof tile fixture 10a is engaged with the ridge-side end 14c of the positioned roof tile 14, and the fixed portion 10a2 is fixed to the sheathing board 4c with a screw 10b. By repeating these steps, the roof tile 10 can be attached to the sheathing board 4c in order from the -D1 direction to the +D1 direction.

[0051] <Action, effect> According to the construction method of the roof structure 3 of the above embodiment, a pair of adhesive portions 12Q are formed spaced apart from each other in the first direction D1 (eaves-ridge direction), so even if tiny holes that allow water to penetrate are formed in the adhesive layer 12Q1, which is the first adhesive portion of the pair of adhesive portions 12Q located on the ridge side, the pressure is reduced in the space S located on the eaves side of the adhesive layer 12Q1, and further penetration of water can be prevented in the adhesive tape 12Q2, which is the second adhesive portion.

[0052] In the shortened roof tile 12 according to the above embodiment, the eaves side portion 12A is arranged on top and the ridge side portion 12B is arranged on the bottom, and the boundary (gap G) between the ridge side portion 12B and the eaves side portion 12A is open toward the ridge (+D1 direction) on the top surface of the shortened roof tile 12. Therefore, unlike when the boundary is open toward the eaves (-D1 direction), it is possible to prevent the upward force of wind from acting to cause water to seep into the gap G between the ridge side portion 12B and the eaves side portion 12A through the boundary.

[0053] Furthermore, the pair of adhesive portions 12Q can be covered with the eaves side portion 12A, which further improves the waterproofing performance.

[0054] According to the above embodiment, the end of the eaves-side portion 12A facing the ridge (in the +D1 direction) is disposed between the ridge-side base 14c1 of the ridge-side portion 12B and the covering portion 14c3, so that the end of the eaves-side portion 12A facing the ridge, i.e., the boundary (gap G) between the ridge-side portion 12B and the eaves-side portion 12A, can be covered with the covering portion 14c3. This makes it possible to more effectively prevent the infiltration of rainwater and the like through the boundary.

[0055] According to the above embodiment, the eaves-side portion 12A can be positioned relative to the ridge-side portion 12B by abutting the ridge-side end of the eaves-side portion 12A against the rising portion 14c2 of the ridge-side portion 12B. Therefore, work efficiency is higher than when joining the eaves-side portion 12A and the ridge-side portion 12B while adjusting the overlapping range between them (the length of the overlapping portion 12P in the first direction D1) so that the total length of the shortened roofing tile 12 becomes the target length.

[0056] According to the above embodiment, by providing an adhesive layer 12Q1 between the end of the eaves side portion 12A facing the ridge, which is the entrance for rainwater, etc., and the ridge side base 14c1 of the ridge side portion 12B, it is possible to efficiently prevent water from entering the gap G between the eaves side portion 12A and the ridge side portion 12B.

[0057] In addition, when water penetrates into the gap G between the eaves side portion 12A and the ridge side portion 12B, the end portion in the -D1 direction of the gap G between the end facing the eaves of the ridge side portion 12B and the underside of the eaves side portion 12A, which is the exit for the water, can be sealed with adhesive tape 12Q2.

[0058] In some cases, a first engagement portion 14d and a second engagement portion 14e are provided to engage adjacent roof tile materials 10 in the horizontal direction (second direction D2). In this case, when the roof tile main body portion 14a is cut, the eave side piece 14A (first eave side piece 14dA, second eave side piece 14eA) of the first engagement portion 14d and the ridge side piece 14B (first ridge side piece 14dB, second ridge side piece 14eB) of the second engagement portion 14e remain in the eave side portion 12A and the ridge side portion 12B, respectively. However, if the eave side portion 12A and the ridge side portion 12B are overlapped as they are, the two eave side pieces 14A and the two ridge side pieces 14B will overlap, making it difficult for the roof tile materials 10 to engage with each other adjacent in the horizontal direction.

[0059] In contrast, according to the above embodiment, by leaving only one of the eaves side pieces 14A or the ridge side pieces 14B for each of the first engagement portion 14d and the second engagement portion 14e, it becomes possible to engage with the adjacent tile material 10 using that one of the eaves side pieces 14A or the ridge side piece 14B.

[0060] According to the above embodiment, the longer eaves side piece 14A or ridge side piece 14B of the eaves side portion 12A or ridge side portion 12B can be used as the engaging portion of the shortened roof tile 12. Therefore, the engaging range can be secured long in the eaves-ridge direction (first direction D1), and the shortened roof tile 12 can be reliably engaged.

[0061] <Modifications of the above embodiment> In the above embodiment, when forming the shortened tile material 12, the eaves side portion 12A and the ridge side portion 12B are overlapped so that the eaves side portion 12A is on top and the ridge side portion 12B is on the bottom, but they may also be overlapped so that the eaves side portion 12A is on the bottom and the ridge side portion 12B is on top.

[0062] In the above embodiment, the ridge side end 14c of the roof tile 14 has a ridge side base 14c1, a rising portion 14c2, and a covering portion 14c3, but this configuration is not essential, and the ridge side end 14c may have only the ridge side base 14c1 without the rising portion 14c2 and the covering portion 14c3.

[0063] Furthermore, in the above embodiment, when forming the shortened roof tile 12, the eaves side portion 12A and the ridge side portion 12B are joined so that the end of the eaves side portion 12A facing the ridge (in the +D1 direction) is positioned between the ridge-side base 14c1 and the covering portion 14c3, but the position of the end of the eaves side portion 12A facing the ridge is not limited to between the ridge-side base 14c1 and the covering portion 14c3. For example, when the ridge-side end portion 14c of the ridge-side portion 12B is configured to have only the ridge-side base 14c1, it is sufficient that the end of the eaves side portion 12A facing the ridge overlaps the ridge-side base 14c1 of the ridge-side portion 12B from above.

[0064] In the above embodiment, the roof tile body 14a was cut so that the eaves-side portion 12A was longer in the first direction D1 than the ridge-side portion 12B, but the roof tile body 14a may be cut so that the ridge-side portion 12B is longer in the first direction D1 than the eaves-side portion 12A, or so that both have the same length in the first direction D1. Also, in the above embodiment, the eaves-side portion 12A and the ridge-side portion 12B were joined with the ridge-side end of the eaves-side portion 12A abutting the rising portion 14c2 of the ridge-side portion 12B, but this is not limited to abutting the ridge-side end of the eaves-side portion 12A against the rising portion 14c2 of the ridge-side portion 12B, and the eaves-side portion 12A and the ridge-side portion 12B may be joined with the ridge-side end of the eaves-side portion 12A separated from the rising portion 14c2 of the ridge-side portion 12B.

[0065] In the above embodiment, an adhesive layer 12Q1 and an adhesive tape 12Q2 are provided as a pair of adhesive portions 12Q, but the configuration of the pair of adhesive portions 12Q is not limited to this form, and it is sufficient if the pair of adhesive portions 12Q are configured to be spaced apart from each other in the first direction D1.

[0066] In the above embodiment, the shorter of the eaves side piece 14A and the ridge side piece 14B is separated from the tile main body 14a, but the eaves side piece 14A and the ridge side piece 14B do not have to be separated, and two eaves side pieces 14A (first eaves side piece 14dA, second eaves side piece 14eA) and two ridge side pieces 14B (first ridge side piece 14dB, second ridge side piece 14eB) may be overlapped and used to engage shortened roof tile materials 12 adjacent in the second direction D2. Also, when separating one of the eaves side piece 14A and the ridge side piece 14B from the tile main body 14a, the separation is not limited to the shorter of the eaves side piece 14A and the ridge side piece 14B, and the longer of the eaves side piece 14A and the ridge side piece 14B may be separated, or either one may be separated as long as they are the same length. [Explanation of symbols]

[0067] 3 Roof structure 4 Roof underlayment 10. Tile roofing materials (multiple roofing materials) 12 Shortened roof tile material (eaves side roof tile material) 12A Eave side part 12B building side part 12P Overlapping part 12Q Pair of adhesive parts 12Q1 Adhesive layer 12Q2 adhesive tape 14 Roof tiles (first roof tiles, second roof tiles, ridge roof tiles) 14A Eaves side piece 14B ridge side piece 14a Tile body 14b Eave side edge 14c End of ridge side 14c1 Ridge side base (base) 14c2 Rising part 14c3 Covering part 14d First engaging part 14dA First eaves side piece (eaves side piece) 14dB 1st building side (ridge side) 14e 2nd engaging part 14eA Second eaves side piece (eaves side piece) 14eB 2nd ridge side piece (ridge side piece D1 1st direction (toward the eaves) D2 Second direction (horizontal direction perpendicular to the ridge direction) G Gap between the eaves side part 12A and the ridge side part 12B

Claims

1. A construction method for a roof structure comprising a roof substrate and a plurality of roof tile materials arranged on the roof substrate in a state where the roof tile materials are aligned along an eaves-ridge direction connecting the eaves and the ridge, each of the roof tile materials having a tile main body portion, an eaves side end portion located on the eaves side of the tile main body portion, and a ridge side end portion located on the ridge side of the tile main body portion, preparing a first roof tile material that is one of the plurality of roof tile materials; The tile body portion of the first tile material is cut so as to be divided into an eaves side portion including the eaves side end portion and a ridge side portion including the ridge side end portion, a portion of the eaves side portion that is arranged toward the ridge and a portion of the ridge side portion that is arranged toward the eaves are overlapped, and the eaves side portion and the ridge side portion are joined together to form a shortened roof tile; preparing a second roof tile material that is one of the plurality of roof tile materials; The shortened tile material and the second tile material are placed on the roof substrate in a state where the eaves side end of the ridge side tile material of the shortened tile material and the second tile material that is placed on the eaves side overlaps from above with the ridge side end of the eaves side tile material of the shortened tile material and the second tile material that is placed on the eaves side, A roof structure construction method in which, when forming the shortened tile material, a pair of adhesive parts are formed spaced apart in the eaves-ridge direction to bond the eaves side part and the ridge side part together so as to close the gap between the eaves side part and the ridge side part at the overlapping part where the eaves side part and the ridge side part overlap each other.

2. A construction method for a roof structure as described in claim 1, wherein when forming the shortened tile material, the eave side portion and the ridge side portion are overlapped so that the eave side portion is on top and the ridge side portion is on the bottom, and the pair of adhesive portions are formed on the underside of the eave side portion.

3. The ridge side end of each of the roof tile materials has a base portion extending from the roof tile main body portion toward the ridge side along the roof tile main body portion, a rising portion rising upward from the base portion, and a covering portion extending from an upper end of the rising portion toward the eaves side so as to cover the base portion from above, A construction method for a roof structure as described in claim 2, wherein when forming the shortened tile material, the eaves side portion and the ridge side portion are joined so that the end of the eaves side portion facing the ridge is positioned between the base portion and the covering portion.

4. When cutting the roof tile body portion, the roof tile body portion is cut so that the eaves side portion is longer in the eaves-ridge direction than the ridge side portion, 4. A construction method for a roof structure as described in claim 3, wherein when forming the shortened tile material, the eaves side portion and the ridge side portion are joined together while the ridge side end of the eaves side portion is abutted against the rising portion of the ridge side portion to position the eaves side portion.

5. 5. A roof structure construction method as described in claim 3 or claim 4, wherein when forming the shortened tile material, an adhesive layer is provided between the underside of the terminal facing the ridge of the eaves side portion and the upper surface of the base of the ridge side portion as the pair of adhesive portions, and adhesive tape is provided from the underside of the terminal facing the eaves of the ridge side portion to the underside of the eaves side portion.

6. Each of the roof tile materials has a first engaging portion extending from one end of the roof tile main body portion in a horizontal direction perpendicular to the eaves-ridge direction to the other side in the horizontal direction along the upper surface of the roof tile main body portion, and a second engaging portion extending from the other end of the roof tile main body portion in the horizontal direction to one side along the lower surface of the roof tile main body portion, When cutting the roof tile body portion, the first engaging portion and the second engaging portion are respectively separated into an eaves side piece belonging to the eaves side portion and a ridge side piece belonging to the ridge side portion, The construction method for the roof structure according to any one of claims 1 to 4, wherein after cutting the tile main body portion and before forming the shortened tile material, the eaves side piece or ridge side piece of the first engaging portion and the eaves side piece or ridge side piece of the second engaging portion are separated from the tile main body portion.

7. Each of the roof tile materials has a first engaging portion extending from one end of the roof tile main body portion in a horizontal direction perpendicular to the eaves-ridge direction to the other side in the horizontal direction along the upper surface of the roof tile main body portion, and a second engaging portion extending from the other end of the roof tile main body portion in the horizontal direction to one side along the lower surface of the roof tile main body portion, When cutting the roof tile body portion, the roof tile body portion is cut so that the lengths of the eaves side portion and the ridge side portion in the eaves-ridge direction are different, and the first engaging portion and the second engaging portion are divided into an eaves side piece belonging to the eaves side portion and a ridge side piece belonging to the ridge side portion, The construction method for the roof structure described in any one of claims 1 to 3, wherein after cutting the tile main body portion and before forming the shortened tile material, the shorter of the eaves side piece and ridge side piece of the first engagement portion and the shorter of the eaves side piece and ridge side piece of the second engagement portion are separated from the tile main body portion.

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