Valley cover, existing roof renovation structure using valley cover and construction method

Abstract

To repair a roof that includes a trough part without removing an existing valley plate.SOLUTION: A valley cover that is used when an existing roof including a trough part is repaired with a repairing roof material where a ridge side inserting part, a covering part and an eaves side folding part are integrally formed, includes a pair of upper surface cover pieces 110 where ridge side end parts can be inserted between existing roof materials overlaid stepwise in an eaves ridge direction, a pair of end surface cover pieces 120 that are connected downward from opposite end edges 112 of the pair of upper surface cover pieces 110 and cover valley side end surfaces of existing roof materials 1001, and valley plate cover pieces 130 crossing between lower edges 122 of the pair of end surface cover pieces 120 and extending along a surface of an existing valley plate 101. The upper surface cover pieces 110, the end surface cover pieces 120 and the valley plate cover pieces 130 are formed integrally.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a technology for repairing existing roofs using repair roofing materials that are installed by covering existing roofing materials in the form of thin plates that are layered in a stepped pattern toward the eaves ridge without removing them.In particular, when the existing roof includes valleys, the present invention relates to a valley cover that has good workability and can more reliably prevent rainwater from entering the valleys, as well as a repair structure and installation method for an existing roof using the valley cover. [Background technology]

[0002] The roofs of residential and other buildings are often constructed with rectangular thin roofing materials stacked in a stepped pattern from the eaves toward the ridge. In this case, "stacked" refers to the upper end of the roofing material stacked on top of the lower end of the roof slope (the eaves side), with the lower end of the roofing material stacked on top of the upper end of the roof slope (the ridge side). Replacing a roof covered in this manner typically requires removing the existing roofing material (e.g., slate tiles, decorative slates, etc.) and replacing it with new roofing material. However, this process is time-consuming and makes it difficult to re-roof while the building remains in use. For this reason, roofs are often re-roofed by attaching renovation roofing material (which means the same as repair or renovation and will not be distinguished below) to the surface of the existing roofing material to cover it (this type of re-roofing method is also known as a covering method).

[0003] Roofs that can be renovated using these roofing materials for renovation may have a structure in which two gable roofs are connected with their ridges perpendicular to each other. Such roofs are sloped so that their height from the ground gradually decreases from the ridge side to the eaves side, with the connected roofs having different slope directions and forming linear valleys at the boundaries between the roofs. JP 2020-200615 A ​​(Patent Document 1) discloses a repair structure for renovating existing flat slate roofs that include such valleys using a covering method.

[0004] The repair structure disclosed in Patent Document 1 is a flat slate roof in which a roof is sloped so that its height gradually decreases from the ridge side to the eaves side, and another roof with a different slope direction is connected to form a single roof, and a valley extending linearly is formed at the boundary between the connected roofs. A plurality of flat slate tiles are laid in sequence from the eaves side to the ridge side with part of the end of each slate tile overlapping with face-to-face contact, and the slate tile on the ridge side is overlapped with the ridge-side end of the slate tile on the eaves-side. The repair structure for this flat slate roof is a repair structure for a flat slate roof in which a repair plate is fixed to overlap the slate tiles with face-to-face contact, and covers the slate tiles. and a rectangular valley plate that is placed over and along the valley portion across each of the repair plates so as to cover the valley side ends of the repair plates facing each other on both sides in the direction, and the valley plate has a rectangular folded portion at its eaves side end that is folded back on the underside toward the ridge side to encase the slate tile and the eaves side end of the repair plate, and a rectangular extension portion is formed at the ridge side end so that it can be inserted into and fixed in the gap between the eaves side end of the ridge side slate tile and the ridge side end of the eaves side slate tile that are stacked on top of each other, and the corners facing the tip of the folded portion or the extension portion of the valley plate are provided with engaging pieces that engage with the slate tile or the end of the repair plate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-200615 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the repair structure disclosed in Patent Document 1, because a repair plate (roofing material for repair) is installed under the valley plate (valley cover for repair), it is difficult to completely eliminate the possibility of rainwater entering through this gap (it is difficult to achieve good workability). Also, the valley plate (valley cover for repair) used in the repair structure disclosed in Patent Document 1 is formed by cutting and bending a thin metal plate, and the possibility cannot be denied that the manufacturing costs will increase due to the complexity of the structure.

[0007] The present invention was developed in consideration of the above-mentioned problems of the prior art, and its purpose is to provide a valley cover, a renovation structure for an existing roof using a valley cover, and a construction method that can renovate a roof, including the valley portion, without removing (dismounting) the existing valley boards or existing roofing materials, while achieving good construction ease and avoiding increased costs. [Means for solving the problem]

[0008] In order to achieve the above object, the repair structure according to the present invention employs the following technical measures. In other words, a valley cover according to one aspect of the present invention is a valley cover used when renovating an existing roof, which includes two or more roof surfaces made of existing thin-plate-shaped roofing materials stacked in a stepped pattern toward the eaves-ridge direction and connected at an incline in different directions, with the existing roofing materials of the connected roof surfaces positioned a predetermined distance apart and including a valley section where existing valley boards have been installed at the connection point, using a renovation roofing material that has a ridge-side insertion portion, a covering portion, and an eaves-side fold portion formed integrally therewith.The valley cover includes a pair of upper cover pieces that can be inserted between the existing roofing materials whose ridge-side ends are stacked in a stepped pattern toward the eaves-ridge direction, a pair of end cover pieces that are connected downward from the opposing edges of the pair of upper cover pieces and cover the valley-side end faces of the existing roofing materials, and a valley board cover piece that extends between the lower edges of the pair of end cover pieces and follows the surface of the existing valley board, and is characterized in that the upper cover piece, the end cover piece, and the valley board cover piece are formed integrally.

[0009] Preferably, the valley board cover piece can be configured so that the height of the end face cover piece gradually increases from the ridge side toward the eaves side so as to fit along the surface of the existing valley board. In addition, another aspect of the present invention is a repair structure for an existing roof, in which two or more roof surfaces, each made of thin existing roofing materials stacked in a staircase pattern in the eaves-ridge direction, are connected at an angle in different directions, and the existing roofing materials of the connected roof surfaces are located at a predetermined distance from each other, and the connected parts include valley sections where existing valley boards are installed. The repair structure includes a repair roofing material in which the ridge side insertion part, covering part, and eaves side folded part are integrally formed, and a valley cover in which a pair of top cover pieces, a pair of end cover pieces, and a valley board cover piece are integrally formed, and the pair of top cover pieces The ridge side end of each cover piece is inserted between the existing roof materials which are stacked in a stepped manner in the eaves direction of each roof surface, a pair of end face cover pieces connected downward from the opposing end edges of the pair of upper face cover pieces cover the valley side end faces of the existing roof materials, the valley cover is provided so that the valley board cover piece spanning between the lower end edges of the pair of end face cover pieces follows the surface of the existing valley board, and the renovation roof material is provided by inserting the ridge side insertion portion between the existing roof materials so that the valley side end of the covering part overlaps the upper face cover piece.

[0010] Preferably, the valley cover is provided for each existing roof material that is stacked in a stepped manner in the eaves-ridge direction, and the valley cover can be configured to be stacked in a stepped manner in the eaves-ridge direction. More preferably, the valley cover at the eaves edge can be configured so that the eaves side end is bent downward so as to cover the eaves side end face of the existing valley board.

[0011] In yet another aspect of the present invention, there is provided a construction method for repairing an existing roof, in which two or more roof surfaces, each made of thin existing roofing materials stacked in a stepped pattern in the eaves-ridge direction, are connected at an incline in different directions, and the existing roofing materials of the connected roof surfaces are located a predetermined distance apart, and the existing valley boards are installed at the connected points. The method uses a repair roofing material that is integrally formed with a ridge-side insertion portion, a covering portion, and an eaves-side folded portion, and a valley cover that is integrally formed with a pair of top cover pieces, a pair of end cover pieces, and a valley board cover piece, and the method involves connecting the valley covers in a stepped pattern in the eaves-ridge direction for each of the existing roofing materials stacked in a stepped pattern in the eaves-ridge direction. the valley section repair step in which the valley cover installation step, in which the valley cover is installed in a stepped manner in the eaves-ridge direction, is repeated from the eaves side to the ridge side, and the valley cover is covered over the existing valley boards along the entire length of the valley section in the eaves-ridge direction; and the roof surface repair step in which, after the valley section repair step, the repair roof materials are installed in a stepped manner in the eaves-ridge direction for each existing roof material that is stacked in a stepped manner in the eaves-ridge direction, so that the repair roof material adjacent to the valley section overlaps the upper cover piece of the valley cover, and the roof surface repair step in which the repair roof material is installed in a stepped manner in the eaves-ridge direction, so that the repair roof material

[0012] Preferably, the valley cover installation step comprises: The valley cover is provided by inserting its end between the existing roof materials which are stacked in a stepped manner in the eaves-ridge direction of each roof surface, so that a pair of end cover pieces connected downward from the opposing end edges of the pair of upper cover pieces cover the valley side end faces of the existing roof materials, and so that the valley board cover piece spanning between the lower end edges of the pair of end cover pieces follows the surface of the existing valley board, and the renovation roof material installation step can be configured to install the renovation roof material by inserting the ridge side insertion portion between the existing roof materials so that the valley side end of the covering portion overlaps the upper cover piece.

[0013] More preferably, the valley cover installation step may be configured to install the valley cover by cutting a part of the eaves side end of the valley cover. More preferably, the renovation roof material installation step can be configured to install the renovation roof material by cutting the renovation roof material diagonally so that the valley side end of the covering portion overlaps the upper cover piece. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a valley cover, a renovation structure for an existing roof using a valley cover, and a construction method that can renovate a roof including the valley portion without removing (dismounting) the existing valley boards or existing roofing materials, while achieving good workability and avoiding increased costs. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram for explaining a repaired portion of a roof to which the repair structure according to the present invention is applied. [Figure 2] FIG. 1 is a perspective view of a roof undergoing renovation using a valley cover 100 (for renovation) according to the present invention. [Figure 3] This is a perspective view of a roof after renovation work using a valley cover 100 and a renovation roof material 1000. [Figure 4] FIG. 3 is a perspective view of the valley cover 100 shown in FIG. 2. [Figure 5] FIG. 3 is a plan view of the valley cover 100 shown in FIG. 2. [Figure 6] This is a cross-sectional view of the valley portion shown in Figure 3 after repair work, taken from the eaves-ridge direction (viewed from the eaves side to the ridge side). [Figure 7] (A) A cross-sectional view perpendicular to the eaves-ridge direction of the valley portion under renovation shown in Figure 2, (B) a cross-sectional view indicated by arrow 7B in Figure 7(A), and (C) a cross-sectional view indicated by arrow 7C in Figure 7(A). [Figure 8] FIG. 1 is a diagram (part 1) for explaining a construction method for realizing the repair structure of an existing roof according to the present invention. [Figure 9] FIG. 2 is a diagram (part 2) for explaining the construction method for realizing the existing roof repair structure according to the present invention. [Figure 10]FIG. 3 is a diagram (part 3) for explaining the construction method for realizing the existing roof repair structure according to the present invention. [Figure 11] FIG. 4 is a diagram (part 4) for explaining the construction method for realizing the existing roof repair structure according to the present invention. [Figure 12] This is a diagram (part 5) for explaining the construction method for realizing the existing roof renovation structure of the present invention. [Figure 13] FIG. 1 is a diagram (part 1) for explaining a flashing cover related to the existing roof repair structure according to the present invention. [Figure 14] FIG. 2 is a diagram (part 2) for explaining the flashing cover related to the existing roof renovation structure according to the present invention. [Figure 15] FIG. 3 is a diagram (part 3) for explaining the flashing cover related to the existing roof renovation structure according to the present invention. [Figure 16] FIG. 4 is a diagram (part 4) for explaining the flashing cover related to the existing roof renovation structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following describes a valley cover according to an embodiment of the present invention, a repair structure for an existing roof using the valley cover, and The valley cover and the construction method will be described in detail with reference to the drawings. First, the valley cover will be described, then the existing roof repair structure using this valley cover will be described, then the construction method for realizing the existing roof repair structure will be described, and finally, the flashing cover related to the existing roof repair structure according to the embodiment of the present invention will be described.

[0017] <Valley Cover> The (renovation) valley cover 100 of the present invention is a valley cover used when renovating an existing roof, including two or more roof surfaces where thin, existing roofing materials 1001 (decorative slates) are stacked in a stepped pattern toward the eaves and ridge, and are connected at different inclinations. The existing roofing materials 1001 on the connected roof surfaces are located a predetermined distance apart, and the existing valley boards 101 are installed at the connected points. The valley cover is used when renovating an existing roof, including a valley section 1C where the existing valley boards 101 are installed at the connected points, with a renovation roofing material 1000 that has an integrally formed ridge-side insertion portion, covering portion, and eaves-side folded portion. Note that the renovation structure and construction method of the present invention include the renovation roofing material 1000. Examples of this renovation roofing material 1000 include the renovation roofing materials disclosed in Japanese Patent Application Laid-Open Nos. 2021-017709 and 2021-119278 filed by the present applicant. The renovation roofing material 1000 is the renovation roofing material 100 described in these publications (hereinafter sometimes referred to as the two publications mentioned above), in which the ridge side insertion portion is the ridge side insertion portion 130, the covering portion is the decorative surface portion 110, and the eaves side fold portion is the eaves side fold portion 120, all of which are integrally formed.

[0018] Figure 1 shows an example of a flat slate roof on which thin, existing roofing material 1001 is laid, to be renovated using this valley cover 100. This roof 1 has a structure in which two gabled roofs are connected with their ridges 1A perpendicular to each other. The roofs 1 are sloped so that their height from the ground gradually decreases from the ridge 1A side to the eaves 1B side, and the slope directions of the connected roofs are different from each other. A linear valley 1C is formed at the boundary between the roofs.

[0019] A plurality of existing flat roofing materials 1001 are laid on the roof 1. Each existing roofing material 1001 is laid sequentially from the eaves 1B side toward the ridge 1A side, with a portion of the end of each existing roofing material 1001 overlapping flush with the other, so that the eaves-side end of the existing roofing material 1001 on the ridge 1A side is overlapped on the ridge-side end of the existing roofing material 1001 on the eaves 1B side. As is well known, weatherstripping is provided on the ridge 1A and valley 1C of the roof 1. Note that in Figure 1, the exterior wall 2 of the house is shown by a dashed line. The existing roofing material 1001 is, for example, a roofing material installed on the base of the roof 1 (base materials such as sheathing boards 1002 and underlayment material 1003 shown in Figures 6 and 7).

[0020] Using the valley cover 100 according to this embodiment, it is possible to renovate an existing roof, including the valley portion 1C of the roof 1 shown in Fig. 1, without removing either the existing valley board 101 or the existing roofing material 1001. The valley cover 100 is then installed to cover the existing valley board 101, as shown in Fig. 2. After the valley cover 100 is installed, the existing roofing material 1001 is then covered with the renovation roofing material 1000. The renovation is completed as shown in Fig. 3, achieving excellent workability and avoiding increased costs. After renovating the existing roof, including the valley portion 1C, using the valley cover 100 and the renovation roofing material 1000, the valley-side end of the covering portion (the decorative surface portion 110 in the above-mentioned two publications) of the renovation roofing material 1000 overlaps the top cover piece 110 of the valley cover 100 in the eaves-ridge direction, as shown in Fig. 6(A). Furthermore, as shown in FIG. 6(B), construction can also be carried out so that the valley side end of the roof material for repair 1000 is folded downward to form a folded portion 1000C.

[0021] Note that the present invention is not limited to being applied only to the roof 1 shown in FIG. 1. Also, in FIGS. 1 to 16 referred to for explaining the present embodiment, not all members related to the construction structure of the roof are shown. Further, even if shown, those having low relevance to the present invention are not provided with reference numerals nor described. Also, in FIGS. 1 to 16 referred to for explaining the present embodiment, for easier understanding of the present invention, there are cases where it is schematically described, cases where hidden lines are not described, cases where parts that should be described with hidden lines are described with solid lines, and cases where details are omitted, resulting in non - matching between the figures. Also, the same components (structures) in different figures are provided with the same reference numerals and the explanations thereof are not repeated. Here, the ridge side is synonymous with the water - upper side, and the eaves side is synonymous with the water - lower side, and they are used without distinction in the explanation of the present invention.

[0022] As shown in FIGS. 4 and 5, the valley cover 100 according to the present embodiment includes a pair of upper - surface cover pieces 110 that can be inserted between existing roof members 1001 whose ridge - side ends (parts corresponding to the length L(7A) shown in FIG. 7) are stacked step - by - step in the ridge - eaves direction, a pair of end - surface cover pieces 120 that are connected downward from the opposing edge 112 of the pair of upper - surface cover pieces 110 and cover the valley - side end surfaces of the existing roof members 1001, and a valley - plate cover piece 130 that extends between the lower edges 122 of the pair of end - surface cover pieces 120 and runs along the surface of the existing valley plate 101. The upper - surface cover pieces 110, the end - surface cover pieces 120, and the valley - plate cover piece 130 are integrally formed.

[0023] Here, in this valley cover 100, the height L of the end - surface cover piece 120 is gradually increased from the ridge side (water - upper side) toward the eaves side (water - lower side) so that the valley - plate cover piece 130 runs along the surface of the existing valley plate 101. Specifically, as shown in FIGS. 4 and 5, the height L(D) of the end - surface cover piece 120 on the water - lower side is larger than the height L(U) of the end - surface cover piece 120 on the water - upper side (L(U)<L(D)), and the height L of the end - surface cover piece 120 is gradually increased (made larger) from the water - upper side (height L(U)) toward the water - lower side (height L(D)).

[0024] By gradually increasing the height L of the end cover pieces 120 in this way, the ridge-side end of the valley cover 100, which corresponds to the length L(7A) shown in Figure 7 (more specifically, the ridge-side end of the top cover piece 110, which corresponds to the length L(7A)), can be inserted between the existing roofing materials 1001. Furthermore, the valley covers 100 can be stacked in a stepped pattern in the eaves-ridge direction (with the ridge side facing upward) as shown in Figure 5(B), and the valley cover pieces 130 can be installed to cover the existing valley boards 101 so that they fit along the surface of the existing valley boards 101. More specifically, as shown in Figure 7(A), the length L(U) of the abovewater end cover piece 120 of one valley cover 100 corresponds to two existing roof boards 1001, and the length L(D) of the belowwater end cover piece 120 corresponds to three existing roof boards 1001. The height L of the end cover piece 120 gradually increases (increases) from the abovewater side (height L(U)) to the belowwater side (height L(D)). Because the height L of the end cover piece 120 is set in this way, the valley board 101 is installed to abut against the base material (sheathing board 1002, underlayment material 1003, etc.) of the valley portion 1C as shown in Figures 7(B) and 7(C). The ridge-side end of the top cover piece 110 corresponding to the length L(7A) can be inserted between the existing roofing materials 1001, and the valley board cover piece 130 can be installed to fit along the surface of the existing valley board 101 (abutting against it without leaving any gaps), covering the existing valley board 101 with the valley cover 100.

[0025] <Renovated structure> Next, a repair structure for an existing roof (using the valley cover 100 and the repair roof material 1000) according to the present invention will be described. The existing roof renovation structure of the present invention is an existing roof renovation structure in which two or more roof surfaces, made of existing thin-plate-shaped roofing materials 1001 (decorative slates) stacked in a stepped pattern toward the eaves ridge, are connected at an angle in different directions, and the existing roof materials 1001 of the connected roof surfaces are located a predetermined distance apart, and the connected points include a valley portion 1C where existing valley boards 101 have been installed. As shown in Figures 2 to 7, this renovation structure includes a renovation roofing material 1000 in which a ridge side insertion portion (ridge side insertion portion 130 in the two publications mentioned above), a covering portion (decorative surface portion 110 in the two publications mentioned above), and an eave side fold portion (eaves side fold portion 120 in the two publications mentioned above) are integrally formed, and a valley cover 100 in which a pair of top cover pieces 110, a pair of end cover pieces 120, and a valley board cover piece 130 are integrally formed.

[0026] Regarding the valley cover 100, the ridge-side ends (portions corresponding to the length L (7A) shown in FIG. 7) of the pair of upper surface cover pieces 110 are inserted between the existing roof materials 1001 stacked in a stepped manner in the eaves-ridge direction of each roof surface, and the remaining portions of the pair of upper surface cover pieces 110 (portions on the eaves side from the ridge-side ends) are placed on the upper surface of the valley side of the existing roof material 1001 on the eaves side, and a pair of end surface cover pieces 120 connected downward from the opposing end edges 112 of the pair of upper surface cover pieces 110 cover the valley-side end faces of the existing roof material 1001, and the valley cover 100 is placed on the existing valley board 10 so that the valley board cover pieces 130 extending between the lower end edges 122 of the pair of end surface cover pieces 120 are aligned along the surface of the existing valley board 101. 1 and is provided (constructed) on the existing roof material 1001.

[0027] The renovation roofing material 1000 is provided (installed) by inserting the ridge-side insertion portion (ridge-side insertion portion 130 in the two publications mentioned above) between the existing roofing materials 1001 so that the valley-side end of the covering portion (decorative surface portion 110 in the two publications mentioned above) overlaps the upper cover piece 110. At this time, as described above with reference to Figure 6(B), the renovation roofing material 1000 may be installed with a folded portion 1000C in which the valley-side end of the renovation roofing material 1000 is folded downward. Here, the valley covers 100 used in this repair structure are provided for each of the existing roof materials 1001 that are stacked in a stepped manner in the eaves-ridge direction, and the valley covers 100 are stacked in a stepped manner in the eaves-ridge direction.

[0028] The valley cover 100 at the eaves edge can also be installed by folding the eaves-side end downward to cover the eaves-side end face of the existing valley board 101. Specifically, as shown in Figure 8, the valley cover 100 installed at the eaves edge is installed by processing the eaves-side end to fit the existing valley board 101. More specifically, a cut is made at the position shown by the dotted line in Figure 8(A) and then folded downward at approximately 90 degrees at the position shown by the dashed line in Figure 8(A). Furthermore, it may be folded over onto the back side at the position shown by the dashed line in Figure 8(B). Bending the eaves-side end in this way makes alignment easier. It is also possible to cut it into a mountain shape without folding it.

[0029] <Construction method> Next, a construction method (hereinafter sometimes simply referred to as construction method) for realizing a repair structure for an existing roof (using the valley cover 100 and the repair roof material 1000) according to the present invention will be described. The construction method of the present invention is a construction method for renovating an existing roof, which includes two or more roof surfaces made of existing thin-plate-shaped roofing materials 1001 (decorative slates) stacked in a stepped pattern toward the eaves-ridge direction and connected at an incline in different directions, with the existing roofing materials 1001 of the connected roof surfaces positioned a predetermined distance apart and including a valley portion 1C where existing valley boards 101 have been installed at the connected points, using a renovation roofing material 1000 integrally formed with a ridge side insertion portion (ridge side insertion portion 130 in the above-mentioned two publications), a covering portion (decorative surface portion 110 in the above-mentioned two publications), and an eaves side fold portion (eaves side fold portion 120 in the above-mentioned two publications), and a valley cover 100 integrally formed with a pair of top cover pieces 110, a pair of end cover pieces 120, and a valley board cover piece 130. As shown in FIGS. 2 to 12 (particularly FIGS. 8 to 12), this construction method mainly includes the following two steps.

[0030] Valley repair steps A valley cover installation step in which valley covers 100 are installed by overlapping each other in a stepped manner in the eaves-ridge direction for each of the existing roof materials 1001 overlapped in a stepped manner in the eaves-ridge direction is repeated from the eaves side to the ridge side, and the valley covers 100 are placed on the existing valley boards 101 over the entire length in the eaves-ridge direction in the valley part 1C. Roof surface repair steps After the valley repair step, for each of the existing roof materials 1001 stacked in a stepped manner in the eaves-ridge direction, the repair roof materials 1000 are stacked in a stepped manner in the eaves-ridge direction so that the repair roof materials 1000 adjacent to the valley are stacked on top of the upper cover pieces 110 of the valley covers 100. This repair roof material installation step is repeated from the ridge side to the eaves side, and the repair roof materials 1000 are placed over the existing roof materials 1001 over the entire length of the roof surface in the eaves-ridge direction.

[0031] Here, the valley cover installation step included in the valley repair step involves inserting the ridge side ends (the parts corresponding to the length L (7A) shown in Figure 7) of each of the pair of upper surface cover pieces 110 between the existing roof materials 1001 stacked in a stepped manner in the eaves-ridge direction of each roof surface, and placing the remaining parts of the pair of upper surface cover pieces 110 (the parts toward the eaves from the ridge side ends) on the upper surface of the valley side of the existing roof material 1001 on the eaves side, and installing the valley cover 100 on the existing valley board 101 and existing roof material 1001 so that a pair of end surface cover pieces 120 connected downward from the opposing end edges 112 of the pair of upper surface cover pieces 110 cover the valley side end surfaces of the existing roof material 1001, and the valley board cover pieces 130 spanning between the lower end edges 122 of the pair of end surface cover pieces 120 follow the surface of the existing valley board 101.

[0032] In addition, the step of installing roofing materials for renovation included in the roof surface renovation step is the same as the step of installing roofing materials for the covering part (the above two sections). The renovation roofing material 1000 is installed by inserting the ridge side insertion portion (ridge side insertion portion 130 in the above-mentioned two publications) between the existing roofing materials 1001 so that the valley side end of the decorative surface portion 110 in the publication overlaps the upper cover piece 110. Here, in the valley cover installation step, it is also preferable to cut a portion of the eaves-side end of the valley cover 100 and install the valley cover 100 for the following reasons: As shown in Figure 9(A), depending on the installation condition of the existing roof material 1001, the positions of the eaves-side edges of the existing roof material 1001 facing each other across the valley portion 1C may be misaligned vertically. In such cases, cutting is performed along the dashed line shown in Figure 8(B) or the hatched portion shown in Figure 8(C).

[0033] Furthermore, in the step of installing the roofing material for repair, it is also preferable to cut the roofing material for repair 1000 closest to the valley portion 1C diagonally so that the valley-side end of the covering portion of the valley cover 100 (the decorative portion 110 in the two publications mentioned above) overlaps the top cover piece 110, and then install the roofing material for repair 1000, for the following reasons: As shown in Figure 11, the roofing material for repair 1000 has a rectangular shape when viewed from above when manufactured, but this rectangular shape makes it impossible to install the roofing material for repair 1000 so that the valley-side end of the covering portion (the decorative portion 110 in the two publications mentioned above) of the roofing material for repair 100 overlaps the top cover piece 110 of the valley cover 100 (in the first place, with a rectangular shape, the valley portion 1C cannot be installed with the roofing material for repair 100 closest to the valley cover 100). Therefore, as shown in Figure 11, the renovation roofing material 1000 is cut diagonally and installed except for the hatched portion, and the renovation roofing material 1000 is installed so that the valley side end of the covering portion of the valley cover 100 (the decorative surface portion 110 in the above-mentioned two publications) overlaps the upper surface cover piece 110.

[0034] The construction method will be broadly divided into a valley repair step and a roof surface repair step and will be described in detail below with reference to Figures 2 to 12 (particularly Figures 8 to 12). Note that although the construction method described below may be described in detail, the present invention is not limited to the construction method described below.

[0035] Valley repair steps As described above, the valley covers 100 are installed by repeating the valley cover installation step of stacking the valley covers 100 in a stepped manner in the eaves-ridge direction for each existing roof material 1001 that is stacked in a stepped manner in the eaves-ridge direction, from the eaves side to the ridge side. (1) As shown in Figures 8(A) and 8(B), the eaves side edge of the first tier valley cover 100 is cut to match the eaves tip shape of the eaves tip of the existing valley board 101 and bent downward approximately 90 degrees to form a bent portion. (2) As shown in FIG. 8(C), adhesive S is applied to the existing valley board 101 in three rows parallel to the eaves-ridge direction so as to correspond to the exposed length of approximately one valley cover 100. (3) The ridge side ends (the parts corresponding to the length L (7A) shown in Figure 7) of the pair of upper cover pieces 110 of the first tier valley cover 100 are inserted between the existing roof materials 1001 stacked in a stepped manner in the eaves-ridge direction of each roof surface (between the first and second tiers), and the remaining parts of the pair of upper cover pieces 110 (the parts on the eaves side from the ridge side ends) are placed on the upper surface of the valley side of the existing roof material 1001 (first tier) on the eaves side, covering the eaves tip edge of the existing valley board 101 with the eaves side end (folded part) of the first tier valley cover 100.

[0036] (4) Press the first valley cover 100 from above to firmly adhere it. (5) Install the second and subsequent valley covers 100 sequentially from the eaves side to the ridge side. Basically, there is no need to cut the valley cover 100 here, but if the height positions of the eaves-side edges of the existing roof materials 1001 on either side of the valley portion 1C in the flow direction (eaves-ridge direction) are different, the eaves-side end of the valley cover 100 may be cut as described with reference to Figure 9. (6) As shown in Figure 10, adhesive S is applied in three parallel rows in the eaves-ridge direction to the existing valley board 101 so as to correspond to the exposed length of approximately one second-tier valley cover 100. Furthermore, adhesive S is applied in one row in a substantially horizontal direction to the top surface of the ridge side of the first-tier valley cover 100 on the eaves side of the first tier.

[0037] (7) The ridge-side end portions (portions corresponding to the length L (7A) shown in FIG. 7) of the pair of upper surface cover pieces 110 in the second-tier valley cover 100 are inserted between the existing roof materials 1001 (between the second and third tiers) stacked in a stepped manner in the eaves-ridge direction of each roof surface, and the remaining portions (portions closer to the eaves than the ridge-side end portions) of the pair of upper surface cover pieces 110 are inserted between the existing roof materials 1001 ( The second tier valley cover 100 is placed on the top surface of the valley side of the existing roof material 1001, and the eaves side edge of the second tier valley cover 100 is roughly aligned with the eaves side edge of the second tier valley cover 100. In addition, the eaves side of the second tier valley cover 100 is overlapped on the ridge side top surface of the first tier valley cover 100 (the part where one row of adhesive S is applied). Here, as an example, it is preferable that the overlap be 50 mm or more. (8) Press the second valley cover 100 from above to firmly adhere it. (9) As shown in Figure 10, apply adhesive S to the existing valley board 101 in three parallel rows in the eaves-ridge direction so as to correspond to the exposed length of approximately one third-tier valley cover 100. Furthermore, apply adhesive S in one row in an approximately horizontal direction to the top surface of the ridge side of the second-tier valley cover 100 on the first-tier eaves side.

[0038] (10) The ridge-side ends (the portions corresponding to the length L (7A) shown in FIG. 7) of the pair of upper cover pieces 110 of the third-tier valley cover 100 are inserted between the existing roofing materials 1001 stacked in a stepped pattern in the eaves-ridge direction of each roof surface (between the third and fourth tiers), and the remaining portions of the pair of upper cover pieces 110 (the portions closer to the eaves than the ridge-side ends) are placed on the valley-side upper surface of the existing roofing material 1001 (third tier) on the eaves side, so that the eaves-side edge of the third-tier existing roofing material 1001 and the eaves-side edge of the third-tier valley cover 100 are approximately aligned. Furthermore, the eaves side of the third-tier valley cover 100 is overlapped on the ridge-side upper surface of the second-tier valley cover 100 (the portion where a single line of adhesive S is applied). Here again, although this is just an example, it is preferable that the overlap be 50 mm or more.

[0039] (11) Press the third valley cover 100 from above to firmly adhere it. (12) Install the valley covers 100 in the same manner from the fourth tier to the top Nth tier. (13) By repeatedly installing the valley cover 100 from the eaves side to the ridge side, as shown in Figure 11, the valley cover 100 is placed over the existing valley board 101 along the entire length of the valley section 1C in the eaves-ridge direction, completing the installation of the valley repair step.

[0040] Roof surface repair steps After the valley repair step (after completing the valley repair step by covering the existing valley boards 101 along the entire length of the valley 1C in the eaves-ridge direction with the valley cover 100), the repair roofing material 1000 is installed by inserting the ridge-side insertion portion (ridge-side insertion portion 130 in the above-mentioned two publications) between the existing roofing materials 1001 so that the valley-side end of the covering portion (decorative surface portion 110 in the above-mentioned two publications) of the repair roofing material 1000 overlaps the top cover piece 110. This installation method shown in Figure 11 is the same as the installation method disclosed in the above-mentioned two publications. As an installation method not disclosed in the above-mentioned two publications, the repair roofing material 1000 closest to the valley 1C is cut diagonally as shown in Figure 11, and the repair roofing material 1000 is installed so that the valley-side end of the covering portion (decorative surface portion 110 in the above-mentioned two publications) of the valley cover 100 overlaps the top cover piece 110. Furthermore, the adhesive S (S1) on the most valley side is applied parallel to and close to the valley cover 100. By repeatedly applying the repair roofing material 1000 sequentially from the ridge side to the eaves side, the repair roofing material 1000 will be applied to one roof surface across the valley portion 1C, as shown in Figure 12. Similarly, by repeatedly applying the repair roofing material 1000 sequentially from the ridge side to the eaves side on the other roof surface, the repair roofing material 1000 will be applied to both roof surfaces across the valley portion 1C, as shown in Figure 3, and the installation method for realizing a repair structure for an existing roof (using the valley cover 100 and the repair roofing material 1000) according to the present invention is completed.

[0041] As described above, according to the valley cover of this embodiment, and the existing roof renovation structure and construction method using the valley cover, the roof, including the valley portion, can be renovated without removing (dismounting) the existing valley boards or existing roof materials, achieving good construction ease and avoiding increased costs.

[0042] <Rainproof cover> As described above, when renovating an existing roof, in addition to valleys, repairs may also be required at the joints between the wall and the roof. Below, with reference to FIGS. 13 to 16, a flashing cover 200 and its installation method related to a structure for renovating an existing roof according to an embodiment of the present invention will be described in detail. The flashing covers 200 are broadly divided into a flow-direction flashing cover 200 shown in FIG. 13 and a girder-direction flashing cover 200 shown in FIG. 14. The installation methods are broadly divided into the installation of the flashing covers 200 and the installation of the renovation roofing materials 1000. The installation methods include a method in which, as shown in FIG. 15, all flashing covers 200 are installed before installing the renovation roofing materials 1000, and then the renovation roofing materials 1000 are installed. Alternatively, as shown in FIG. 16, the renovation roofing materials 1000 are partially installed before installing the flashing covers 200, and then all flashing covers 200 are installed in the middle, and then the remaining renovation roofing materials 1000 are installed. The tip of this flashing cover 200 is made 10 mm or more longer than the retaining piece of the existing flashing cover so that it can abut against the surface of the roof material 1000 for renovation.

[0043] <How to install the rain flashing cover> First, a method for installing the flashing cover 200 will be described in detail below. (1) Apply a line of adhesive to the back surface of the flashing cover 200 on the wall side along approximately the entire length in the longitudinal direction. (2) Insert the wall-side end of the flashing cover 200 into the gap between the existing exterior wall material and the existing flashing 201, and press down on the flashing cover 200 from above to firmly adhere it. (3) In the case of the flow direction shown in Fig. 13, the ridge side end of the eaves side flashing cover 200 is installed so that it overlaps with the ridge side end of the ridge side flashing cover 200. Here, as an example, it is preferable that the overlap is 50 mm or more. (4) In the case of the girder direction shown in Fig. 14, the ends of the left and right flashing covers 200 are installed so as to overlap each other. Here again, although this is just an example, it is preferable that the overlap be 50 mm or more. (5) Fix the rain gutter cover 200 to the existing eaves edge with nails (or screws). (6) In the same manner, carry out the work one by one. Next, a detailed description will be given of the method for applying the roofing material for repair 1000. The method for applying this roofing material for repair 1000 is the same as the method disclosed in the above-mentioned two publications.

[0044] (A) In the case of flow direction First pattern (Figure 15) After all the flashing covers 200 have been installed, the roofing material for repair 1000 is installed from the ridge side toward the eaves side. The wall side end of the roof material for repair 1000 is inserted between the existing flashing 201 and the existing roof material 1001. Second pattern (Figure 16) The roofing materials for renovation 1000 are installed in multiple stages from the ridge side. Here, "multiple stages" refers to a number of stages that will not step on the roofing materials for renovation 1000 when installing the flashing covers 200. After installing the roofing materials for renovation 1000 in multiple stages from the ridge side (while the roofing materials for renovation 1000 are being installed), all of the flashing covers 200 are installed.

[0045] The remaining roofing material for renovation 1000 is applied from the ridge side toward the eaves side. When joining the flashing covers 200, the ridge side edge of the flashing cover 200 on the ridge side is inserted under the eaves side edge of the flashing cover 200 on the ridge side. The wall side end of the roof material for repair 1000 is inserted between the existing flashing 201 and the existing roof material 1001.

[0046] (B) In the case of the girder direction After all of the roofing materials 1000 for wall renovation have been installed, the rainproof cover 200 is installed. The wall side (ridge side) end of the roof material for repair 1000 is inserted between the existing flashing 201 and the existing roof material 1001. After all the flashing covers 200 in the girder direction have been installed, the remaining roofing materials for renovation 1000 are installed from the ridge side toward the eaves side.

[0047] As described above, according to the rain gutter cover 200 and its installation method related to the existing roof renovation structure of this embodiment, an existing roof including an existing rain gutter 201 can be suitably renovated using the rain gutter cover 200 (and the renovation roof material 1000). It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims, not by the above description, and it is intended to include all modifications within the meaning and scope of the claims. It is illustrated. [Industrial Applicability]

[0048] The present invention is preferred for a renovation structure that allows existing roofs to be renovated without removing existing roof components (valley boards, existing roofing materials), and is particularly preferred in that it allows the roof, including the valley portion, to be renovated without removing (dismounting) the existing valley boards or existing roofing materials that have been installed, achieving good workability and avoiding increased costs. [Explanation of symbols]

[0049] 100 (Renovation) Valley Cover 101 Existing valley board 1000 Renovation roofing materials 1001 Existing roofing material (decorative slate)

Claims

1. The valley cover is used when renovating an existing roof, which has two or more roof surfaces connected at an angle in different directions, with existing thin-plate roofing materials stacked in a stepped pattern in the eaves-ridge direction, and the existing roofing materials of the connected roof surfaces are located a predetermined distance apart, and includes a valley section where existing valley boards have been installed at the connected points, with a renovation roofing material that has a ridge-side insertion section, a covering section, and an eaves-side folded section integrally formed. A pair of upper cover pieces that can be inserted between existing roof materials whose ridge side ends are stacked in a stepped manner toward the eaves ridge; A pair of end cover pieces connected downward from the opposing end edges of the pair of upper cover pieces to cover the valley side end surfaces of the existing roof material; a valley plate cover piece extending between the lower end edges of the pair of end surface cover pieces and extending along the surface of the existing valley plate; A valley cover characterized in that the top cover piece, the end cover piece, and the valley plate cover piece are integrally formed.

2. 2. The valley cover according to claim 1, wherein the height of the end cover piece gradually increases from the ridge side toward the eaves side so as to fit along the surface of the existing valley board.

3. This is a repair structure for an existing roof, in which two or more roof surfaces, each made of thin, existing roofing materials stacked in a stepped pattern in the eaves-ridge direction, are connected at an angle in different directions, and the existing roofing materials on the connected roof surfaces are located at a predetermined distance from each other, and the existing valley boards are installed at the connected points. A roofing material for renovation in which a ridge-side insertion portion, a covering portion, and an eaves-side folded portion are integrally formed; a valley cover in which a pair of top cover pieces, a pair of end cover pieces, and a valley plate cover piece are integrally formed, The ridge side ends of the pair of upper cover pieces are inserted between the existing roof materials stacked in a stepped manner in the eaves ridge direction of each roof surface, A pair of end cover pieces connected downward from the opposing end edges of the pair of upper cover pieces cover the valley side end faces of the existing roof material, The valley cover is provided so that the valley plate cover piece extending between the lower end edges of the pair of end surface cover pieces is along the surface of the existing valley plate, A renovation structure for an existing roof, characterized in that the renovation roof material is installed by inserting the ridge side insertion portion between the existing roof materials so that the valley side end of the covering portion overlaps the upper cover piece.

4. The valley cover is provided for each existing roof material that is stacked in a stepped manner in the eaves ridge direction, The existing roof renovation structure according to claim 3, characterized in that the valley covers are stacked in a stepped manner in the eaves-ridge direction.

5. A renovation structure for an existing roof as described in claim 3 or claim 4, characterized in that the eaves valley cover has an eaves side end bent downward so as to cover the eaves side end face of the existing valley board.

6. A construction method for repairing an existing roof, in which two or more roof surfaces, each made of thin existing roofing materials stacked in a stepped pattern in the eaves-ridge direction, are connected at an angle in different directions, with the existing roofing materials of the connected roof surfaces positioned a predetermined distance apart and including a valley section where an existing valley board has been installed at the connection point, using a repair roofing material in which a ridge-side insertion section, a covering section, and an eaves-side folded section are integrally formed, and a valley cover in which a pair of top cover pieces, a pair of end cover pieces, and a valley board cover piece are integrally formed, The valley cover installation step involves stacking the valley covers in a stepped manner in the eaves-ridge direction for each existing roofing material, from the eaves side to the ridge side, and then covering the existing valley boards with the valley covers along the entire length of the valley in the eaves-ridge direction. This construction method is characterized by including a roof surface renovation step in which, after the valley repair step, the renovation roof materials are stacked in a stepped manner in the eaves-ridge direction for each existing roof material so that the renovation roof material adjacent to the valley is overlapped on top of the upper cover piece of the valley cover, repeating this step from the ridge side to the eaves side, and covering the renovation roof material over the entire length of the roof surface in the eaves-ridge direction with the renovation roof material.

7. The valley cover installation step involves inserting the ridge-side ends of the pair of upper cover pieces between the existing roof materials stacked in a stepped pattern in the eaves-ridge direction of each roof surface, so that a pair of end cover pieces connected downward from the opposing end edges of the pair of upper cover pieces cover the valley-side end faces of the existing roof materials, and so that the valley cover is installed so that the valley board cover piece spanning between the lower end edges of the pair of end cover pieces follows the surface of the existing valley board. The construction method described in claim 6, characterized in that the renovation roof material installation step includes inserting the ridge side insertion portion between the existing roof materials so that the valley side end of the covering portion overlaps the upper cover piece to install the renovation roof material.

8. The construction method according to claim 7, wherein the valley cover installation step includes cutting a part of the eaves side end of the valley cover to install the valley cover.

9. The construction method described in claim 7, characterized in that the renovation roof material installation step involves cutting the renovation roof material diagonally so that the valley side end of the covering portion overlaps the upper cover piece, and installing the renovation roof material.

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