Roof renovation structure and renovation method

Abstract

To provide a repair structure and a repair method of a roof allowing re-roofing smoothly even when an auxiliary tool of a functional facility is constructed on a surface of a roofing material.SOLUTION: In a repair structure and a repair method of a roof, a roofing material 3 in a thin plate shape is layered and constructed in step-wise in an eaves ridge direction and an auxiliary tool 5 of a functional facility is constructed on a surface 3A of the roofing material 3, a roofing material 4 for repair having a ridge side insertion part 11, a decorative surface part 12 and an eaves side folded part 13 is constructed on the surface 3A of the roofing material 3 in a state of being provided with an interference avoidance space 20 so as not to interfere with the auxiliary tool 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a roof repair structure and a repair method using a roof repair material. [Background technology]

[0002] Many roofs of buildings, such as detached houses, are constructed with roofing materials stacked in a stepped pattern in the eaves-ridge direction. When re-roofing a roof with this type of structure, it is common to remove all of the existing roofing materials and replace them with new ones. However, this method requires time and effort to remove the existing roofing materials. Another problem is that the use of the building is restricted during this period. For this reason, a method known as a cover method, in which the existing roofing materials are not removed but are instead covered with new roofing materials, is widely adopted (e.g., Patent Documents 1 and 2).

[0003] Patent Document 1 discloses a roofing material for repair that can be used in the above-mentioned covering method. This roofing material for repair is formed from a rectangular thin plate that is long in a direction perpendicular to the eaves-ridge direction (beam direction). The roofing material for repair has a folded portion (eaves-side folded portion) at the end on the eaves side, and is attached to the surface of the roofing material by inserting the end on the ridge side (ridge-side insertion portion) into the overlapping portion between roofing materials lined up in the eaves-ridge direction and fitting the folded portion (eaves-side folded portion) into the edge on the eaves side of the roofing material.

[0004] Patent Document 2 discloses a roofing material for renovation (roofing material for reform) used in the above-mentioned covering method. Like the roofing material for renovation of Patent Document 1, this roofing material for renovation also has a folded portion (clamping portion) at the end on the eaves side, and the end on the ridge side (clamped portion) is inserted into the overlapping portion between roofing materials lined up in the eaves-ridge direction, and the folded portion (clamping portion) is fitted into the edge on the eaves side of the roofing material, and is attached to the surface of the roofing material.

[0005] Meanwhile, in recent years, an increasing number of buildings have functional equipment such as solar cell modules, solar hot water heaters, and outdoor units of air conditioning systems installed on their roofs. When installing such functional equipment on the roof, auxiliary devices such as support brackets for supporting the functional equipment and covers for covering insertion holes for cables are attached to the surface of the roof material (for example, Patent Document 3).

[0006] Patent Document 3 discloses a support bracket (mounting fixture) for mounting a solar cell module on a roof. This support bracket has a plurality of mounting holes in the bottom plate, and fastening elements such as screws or nails are inserted into the mounting holes and threadedly engaged with the roof underlayment or roof material (slate tiles), thereby fixing it to the surface of the roof material. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-119278 [Patent Document 2] JP 2001-073506 [Patent Document 3] Patent Publication No. 2012-193569 Summary of the Invention [Problem to be solved by the invention]

[0008] However, if auxiliary devices such as the support brackets in Patent Document 3 are fixed to the surface of the existing roofing material, they will get in the way when installing the roofing material for renovation using the above-mentioned covering method. Moreover, since the auxiliary devices are firmly fixed to the surface of the roofing material so that they do not easily come off the roof, removing them before installing the roofing material for renovation is time-consuming and laborious.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a roof renovation structure and renovation method that allows for smooth re-roofing even if auxiliary functional equipment has been installed on the surface of the roof material. [Means for solving the problem]

[0010] In order to solve the above problems, the roof renovation structure and renovation method of the present invention employ the following technical measures.

[0011] The roof repair structure of the present invention is a roof repair structure in which thin plate-shaped roofing materials are installed in a stepped pattern in the eaves-ridge direction, and auxiliary functional equipment is installed on the surface of the roofing materials, and the repair roofing materials, which have a ridge-side insertion portion, a decorative surface portion, and an eaves-side folded portion, are installed on the surface of the roofing materials with an interference avoidance space provided so as not to interfere with the auxiliary equipment. A water-stopping member is provided near the interference avoidance space, and the water-stopping member has a fixing piece and a rising piece provided upright near the ridge side of the auxiliary tool, and at least a part of the fixing piece is inserted into the gap between the roof material and the roof material for repair and fixed. It is characterized by the fact that In addition, the roof renovation structure of the present invention is a roof renovation structure in which thin plate-shaped roofing materials are installed in a stepped pattern in the eaves-ridge direction, and auxiliary functional equipment is installed on the surface of the roofing materials, wherein the renovation roofing material, which has a ridge-side insertion portion, a decorative portion, and an eaves-side fold portion, is installed on the surface of the roofing material with an interference avoidance space provided so as not to interfere with the auxiliary equipment, and a water-stopping member is provided near the interference avoidance space, and the water-stopping member is formed by bending the end of the renovation roofing material facing the interference avoidance space.

[0012] Preferably, the interference avoidance space is provided so as to open at least on the eaves side. Preferably, the interference avoidance space is provided so as to open at least on the ridge side.

[0013] Preferably, the interference avoidance space is defined by cutting the girder-side end of the roof material for repair. Alternatively, the interference avoidance space is defined by cutting out a portion of the roof material for repair. Alternatively, the interference avoidance space is defined by arranging two adjacent roof materials for repair that are lined up in the girder direction at a predetermined distance from each other.

[0014] Preferably ,before The waterproofing member is provided near the ridge side of the auxiliary tool.

[0015] Preferably, the water-stopping member is provided along the edge of the roof material for repair facing the interference avoidance space. Alternatively, the water-stopping member is provided along substantially the entire length of the edge of the roof material for repair facing the interference avoidance space.

[0016] Preferably, the water-stopping member is provided so as to surround the outer periphery of the auxiliary tool, and a drain portion is provided on the eaves side.

[0021] Roof repair method of the present invention In the method, the waterproofing member is provided after the roofing material for repair is applied to the surface of the roofing material, or the waterproofing member is provided before the roofing material for repair is applied to the surface of the roofing material. [Effects of the Invention]

[0022] According to the roof repair structure and repair method of the present invention, even if auxiliary functional equipment is installed on the surface of the roof material, the roof can be smoothly re-roofed using the repair roof material. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 2 is a perspective view showing a schematic configuration of a roof according to the embodiment. [Figure 2] 1 is a schematic cross-sectional view showing a schematic configuration of a roof according to an embodiment. [Figure 3] FIG. 2 is a plan view showing a schematic configuration of a roof according to the embodiment. [Figure 4] FIG. 2 is a perspective view showing the periphery of the roof support device of the first embodiment. [Figure 5] This is an oblique view showing an intermediate state 1 of the roof renovation procedure I of the first embodiment. [Figure 6] This is an oblique view showing an intermediate state 2 of the roof renovation procedure I of the first embodiment. [Figure 7] This is an oblique view showing an intermediate state 3 of the roof renovation procedure I of the first embodiment. [Figure 8] This is an oblique view showing an intermediate state 1 of the roof renovation procedure II of the first embodiment. [Figure 9] This is an oblique view showing an intermediate state 2 of the roof renovation procedure II of the first embodiment. [Figure 10] This is an oblique view showing an intermediate state 3 of the roof renovation procedure II of the first embodiment. [Figure 11] FIG. 10 is a plan view showing the periphery of a roof auxiliary device according to a second embodiment. [Figure 12] FIG. 10 is a plan view showing the periphery of a roof auxiliary device according to a third embodiment. [Figure 13]FIG. 10 is a plan view showing the periphery of a roof auxiliary device according to a fourth embodiment. [Figure 14] FIG. 10 is a plan view showing the periphery of a roof auxiliary device according to a fifth embodiment. [Figure 15] FIG. 10 is a plan view showing the periphery of a roof auxiliary device according to another embodiment (1). [Figure 16] FIG. 10 is a perspective view showing the periphery of a roof support device according to another embodiment (2). [Figure 17] FIG. 10 is a perspective view showing the periphery of a roof support device of another embodiment (3). [Figure 18] FIG. 10 is a perspective view showing the periphery of a roof support device of another embodiment (4). [Figure 19] FIG. 10 is a perspective view showing the periphery of a roof support device of another embodiment (5). [Figure 20] FIG. 10 is a plan view showing the periphery of a roof auxiliary device of another embodiment (6). [Figure 21] FIG. 10 is a plan view showing the periphery of a roof auxiliary device of another embodiment (7). [Figure 22] FIG. 10 is a plan view showing the periphery of a roof auxiliary device of another embodiment (8). DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention relates to a roof repair structure and a roof repair method, and is not limited to the embodiment described below.

[0025] First Embodiment As shown in Figures 1 to 3, roof 1 according to the first embodiment of the present invention is inclined at a predetermined gradient in the eaves-ridge direction and includes decorative slate 3 as an existing roofing material applied to the surface of base material 2, and renovation roofing material 4 that covers the surface 3A of decorative slate 3 (hereinafter referred to as "slate surface" as appropriate). Furthermore, if functional equipment such as solar cell modules, solar hot water heaters, and outdoor units for air conditioning equipment are installed on roof 1, auxiliary devices 5 such as support brackets for supporting the functional equipment and covers for cable insertion holes are attached to slate surface 3A. Roof 1 also includes joint covers, eaves flashings, gable flashings, etc., but these components are not directly related to the present invention and will not be described here.

[0026] Although not shown, the base material 2 is composed of sheathing boards, underlayment materials that cover the surface of the sheathing boards, etc. As shown in Figs. 1 to 3, the decorative slates 3 are thin plate-shaped plates, and are arranged in multiple rows in the girder direction on the surface of the base material 2, and are stacked in a stepped pattern in the eaves-ridge direction. In this embodiment, the decorative slates 3 are formed in a generally rectangular shape in plan view, with both corners on the ridge side cut out obliquely. The decorative slates 3 are installed in a staggered arrangement so that the girder side half of the ridge side end 6 of the decorative slate 3 on the eaves side overlaps the girder side half of the eaves side end 7 of the decorative slate 3 on the ridge side.

[0027] It should be noted that the roof repair structure and repair method of the present invention are not only applicable to roofs with staggered arrangement of decorative slates 3 as described above. Furthermore, the roof repair structure and repair method of the present invention are not only applicable to roofs constructed with decorative slates 3 of the above-described shape. Specifically, the decorative slates 3 may be rectangular plates with right-angled corners on the ridge and eaves sides, plates with slits at the eaves-side end 7, or plates with corrugated, mountain-shaped, stepped, or other irregularities at the eaves-side end 7.

[0028] The decorative slates 3 are installed on the surface of the base material 2 in sequence from one side of the girder direction to the other and from the eave side to the ridge side in the eaves-ridge direction. Specifically, the decorative slates 3 are installed in sequence from one side of the girder direction to the other and fixed with roofing nails 8 for the row of decorative slates 3 furthest from the eaves in the eaves-ridge direction, i.e., the first row from the eaves side (N=1), and then for the next row of decorative slates in the girder direction from the second row from the eaves side (N=2), they are installed in sequence from one side of the girder direction to the other (or the opposite direction) so that they partially overlap the first decorative slate 3 from the eaves side. In this way, the decorative slates 3 are installed in sequence starting from the Nth row (N=1, 2, 3, etc.) from the eaves side in the eaves-ridge direction until they reach the ridge of the roof 1. The decorative slates 3 may be installed in sequence starting from the row of decorative slates in the girder direction on the ridge side in the eaves-ridge direction, or they may be installed in sequence starting from the center of the girder direction in each row.

[0029] The roofing material for renovation 4 is a plate formed by bending or other processes from a rectangular metal thin plate that is longer in the girder direction than in the eaves-ridge direction, and is installed so as to cover the surface 3A of the decorative slate 3. The roofing material for renovation 4 also has a ridge-side insertion portion 11, a decorative surface portion 12, and an eaves-side fold-back portion 13. That is, the roofing material for renovation 4 is a plate formed integrally with the ridge-side insertion portion 11, decorative surface portion 12, and eaves-side fold-back portion 13, and is held and fixed to the slate surface 3A by inserting the ridge-side insertion portion 11 from the girder side into the overlapping portion 3R of the decorative slates 3 lined up in the eaves-ridge direction, and by engaging the eaves-side fold-back portion 13 with the eaves-side end portion 7 of the decorative slate 3 from the eaves side.

[0030] The roofing material for repair 4 is preferably formed from a metal plate approximately 0.3 mm to 0.4 mm thick. The metal plate may be one of iron, aluminum, copper, stainless steel, titanium, aluminum-zinc alloy-plated steel, enameled steel, clad steel, laminated steel (e.g., PVC steel), or sandwich steel (e.g., vibration-damping steel), including metallic color plates painted in various colors. More preferably, aluminum-zinc alloy-plated steel or aluminum-zinc alloy-plated steel with magnesium added for rust prevention is used. The roofing material for repair 4 may be formed by not only folding but also roll forming, press forming, extrusion, notching, or other methods. Furthermore, the roofing material for repair 4 may be formed from a synthetic resin plate such as vinyl chloride resin or polycarbonate resin (including synthetic resin color plates painted in various colors).

[0031] The ridge side insertion portion 11 is hemmed along the edge on the back side (the side facing the slate surface 3A) (see Figure 2), and this hemmed portion 11P is inserted from the eaves side into the gap (overlap portion 3R) between the eaves side end portion 7 of the ridge side decorative slate 3 and the surface 3A of the eaves side decorative slate 3 and held in place.

[0032] The decorative surface portion 12 is formed in a corrugated cross section with unevenness in the front-to-back direction. The unevenness is formed across the girder-side end portions 14 of the roofing material for renovation 4 on the decorative surface portion 12. In this embodiment, the unevenness is formed in an accordion-like shape with mountain bends and valley bends alternately continuing in the eaves-ridge direction. In addition, the slope on the eaves side that forms the valley bends is formed so that the roofing material for renovation 4 can be properly installed. When installed, the angle is set to be less than horizontal (inclined downwards toward the eaves side). In Figures 1 to 3, the renovation roofing material 4 is illustrated as having an accordion-like fold to make it easier to distinguish between the decorative slate 3 and the renovation roofing material 4. The decorative surface portion 12 may have only one convexity consisting of one mountain fold and one valley fold near the eaves side end (eaves side fold portion 13). The decorative surface portion 12 may also be formed in a flat shape with no irregularities from the ridge side insertion portion 11 to the eaves side fold portion 13.

[0033] The eaves-side folded portion 13 is bent approximately 180 degrees from the decorative surface portion 12 toward the back surface (the side facing the slate surface 3A) and has a generally U-shaped cross section. In this embodiment, the eaves-side folded portion 13 has a generally U-shaped cross section, with a drip edge 15 bent approximately 30 degrees from the decorative surface portion 12 toward the back surface, a vertical portion 16 bent approximately 90 degrees from the drip edge 15 toward the back surface, and an eaves-side insertion portion 17 bent approximately 90 degrees from the vertical portion 16 toward the ridge side so as to be generally parallel to the decorative surface portion 12. Although not shown, a drainage hole is provided near the boundary (bent portion) between the vertical portion 16 and the eaves-side insertion portion 17.

[0034] The eaves side insertion portion 17 is hemmed along the edge on the surface side (the side facing the back surface 3B of the decorative slate 3) (see Figure 2), and this hemmed portion 17P is inserted and held in place from the eaves side into the gap (overlap portion 3R) between the eaves side end portion 7 of the ridge side decorative slate 3 and the surface 3A of the eaves side decorative slate 3.

[0035] The roof repair structure and repair method of the present invention are not limited to roofs using repair roofing materials 4 having the above-described shape. Specifically, eaves-side folded portion 13 may not have a water drip edge 15 and may have a generally U-shaped cross section, with a vertical portion bent approximately 90 degrees from decorative surface portion 12 to the backside and an eaves-side insertion portion bent approximately 90 degrees from the vertical portion to the ridge side so as to be generally parallel to decorative surface portion 12. Alternatively, it may have a generally U-shaped cross section, with a folded portion bent approximately semicircularly from decorative surface portion 12 to the backside and an eaves-side insertion portion extending from the edge on the back side of the folded portion to the ridge side generally parallel to decorative surface portion 12. Furthermore, the edges of ridge-side insertion portion 11 and eaves-side insertion portion 17 do not need to be hemmed.

[0036] The roofing materials 4 for renovation are applied to the slate surface 3A sequentially from one side of the girder to the other and from the ridge side to the eaves side in the eaves-ridge direction. Specifically, the roofing materials 4 for renovation are first lined up in the girder direction from the furthest ridge side (i.e., the first line (N=1) from the ridge side) and adhesively fixed to the slate surface 3A sequentially from one side of the girder to the other (or the reverse) for the next line of the girder direction from the second line (N=2) from the ridge side. In this way, the roofing materials 4 for renovation are applied in order from the Nth line (N=1, 2, 3, etc.) from the ridge side in the eaves-ridge direction until they reach the eaves of the roof 1. This prevents workers from standing on the existing decorative slates 3, even if they do stand on the renovation roofing materials 4 after installation.

[0037] The roofing materials for renovation 4 may be installed in a row starting from the ridge side in the girder direction in the eaves-ridge direction, or in a row lined up in the girder direction starting from the center of the girder direction. The roofing materials for renovation 4 may also be fixed by simply engaging the ridge-side insertion portion 11 and the eaves-side folded portion 13 with the decorative slate 3 as described above, without being adhered to the slate surface 3A, or they may be fixed to the decorative slate 3 by other common methods.

[0038] The auxiliary tool 5 is fixed to the surface 3A of a predetermined decorative slate 3 in accordance with the installation location of the functional equipment. Specifically, the auxiliary tool 5 of this embodiment is provided on the slate surface 3A closer to the eaves side than the overlapping portion 3R of the decorative slates 3 on the ridge side, i.e., closer to the eaves side end 7.

[0039] The auxiliary tool 5 of this embodiment is a support bracket that supports and fixes the solar cell module, and includes a fixing plate 5A and a support frame 5B. The fixing plate 5A is formed in a substantially square shape, and is fixed to a predetermined slate surface 3A with screws, with one diagonal line aligned with the eaves-ridge direction. The support frame 5B is formed upright on the surface of the fixing plate 5A.

[0040] If the auxiliary tool 5 is fixed to the slate surface 3A as described above, the roofing material for renovation 4 cannot be smoothly attached to the decorative slate 3 (the auxiliary tool 5 gets in the way and the roofing material for renovation 4 cannot be placed on the slate surface 3A). Therefore, the roof 1 of this embodiment is installed on the slate surface 3A with an interference avoidance space 20 provided so that the predetermined roofing material for renovation 4 does not interfere with the auxiliary tool 5.

[0041] Furthermore, when the interference avoidance space 20 is provided as described above, rainwater running down the surface of the roof material for renovation 4 may be more likely to flow into the interference avoidance space 20, and there is a risk that rainwater running down the slate surface 3A of the interference avoidance space 20 may seep through the gap between the auxiliary tool 5 and the slate surface 3A, through screw holes or the like, and into the back side of the decorative slate 3. Therefore, the roof 1 of this embodiment is provided with an interference avoidance space 20, and furthermore, a water-stopping member 21 is provided near the interference avoidance space 20.

[0042] As shown in Figure 4, in the first embodiment of the present invention, the interference avoidance space 20 is defined by cutting the girder-side end 14 of the roof material for repair 4 (hereinafter referred to as the "target roof material for repair") that is attached at a position where it will interfere with the auxiliary device 5. More specifically, two target roof materials for repair 4 that are lined up adjacent to each other in the girder direction have their girder-side end 14 (ends that butt together in the girder direction) cut diagonally from the middle in the eaves-ridge direction to the eaves-side end (eaves-side fold 13), and by arranging these cut sections facing each other in the girder direction, an interference avoidance space 20 that is triangular in plan view and widens from the ridge side to the eaves side (i.e., opens on the eaves side) is defined in the target roof material for repair 4.

[0043] The water-stopping members 21 are frames that are approximately L-shaped in plan view, and are provided in pairs on the slate surface 3A exposed to the interference avoidance space 20, lined up in the girder direction so as to surround the outer periphery of the auxiliary tool 5. More specifically, the water-stopping members 21 are provided near one and the other girder sides of the auxiliary tool 5 on the slate surface 3A, with the inner surfaces (concave portions of the L-shape) of the rising pieces 23 facing the auxiliary tool 5 from the girder direction. The water-stopping members 21 are also provided along the end (end face of the cut portion) of the roof material 4 to be repaired that faces the interference avoidance space 20.

[0044] The water-stopping member 21 is a frame formed by bending a rectangular metal thin plate elongated in one direction into a generally L-shaped frame in plan view, and includes a fixed piece 22 and a rising piece 23. The rising piece 23 is a plate piece that is L-shaped in plan view, and a fixing piece 22 is provided on each of the long edges (the edge on the decorative slate 3 side) of its folded halves 23A and 23B. The fixing piece 22 is a generally rectangular plate piece that protrudes from the long edges of the folded halves 23A and 23B toward the outer surface (the convex portion of the L shape) of the rising piece 23. The fixing piece 22 is adhesively fixed to the slate surface 3A near the outer periphery girder side of the auxiliary device 5, with the connecting edge with the rising piece 23 facing one side of the fixing plate 5A of the auxiliary device 5. As a result, the water-stopping member 21 is fixed to the slate surface 3A with one (ridge side) folded half portion 23A of the standing piece 23 standing up near the ridge side of the auxiliary device 5, and the other (eaves side) folded half portion 23B standing up near the eaves side of the auxiliary device 5.

[0045] The fixing piece 22 provided on the folded half portion 23A on the ridge side of the rising piece 23 is fixed at a position inserted into the gap 25 between the roof material for renovation 4 and the decorative slate 3 from the end face of the cut portion of the roof material for renovation 4 facing the interference avoidance space 20. As a result, the folded half portion 23A on the ridge side of the rising piece 23 is provided standing up along the end face of the cut portion. It is provided along the end (end surface of the cut portion) of the roof material for repair 4 facing the space 20.

[0046] Two water-stopping members 21, provided near the girder sides of one and the other of the auxiliary members 5, are fixed to the slate surface 3A with the ridge-side edges of the rising pieces 23 (the ridge-side edges of the ridge-side folded halves 23A) joined together. That is, the two water-stopping members 21 are arranged in a V-shape with the ridge-side folded halves 23A of the rising pieces 23 aligned along the edge (the cut end face) of the roofing material 4 for renovation facing the interference avoidance space 20. As a result, rainwater flowing from the ridge side of the roof 1 down the surface of the roofing material 4 for renovation into the interference avoidance space 20 is diverted along the ridge-side outer surface of the rising pieces 23 (the outer surface of the ridge-side folded halves 23A) toward the outer girder of the auxiliary member 5 and flows toward the eaves side of the attachment point of the auxiliary member 5. A sealant, waterproof tape, or other sealing material may be applied to the joint between the ridge-side edges of the two rising pieces 23 to further enhance waterproofing.

[0047] Furthermore, the two water-stopping members 21 are fixed to the slate surface 3A with a drainage gap (drainage section) 26 defined between the eaves-side edges of the standing pieces 23 (the eaves-side edges of the folded half sections 23B on the eaves side). That is, the two water-stopping members 21 are provided so as to surround almost the entire outer periphery of the auxiliary device 5, and the drainage section 26 is provided on the eaves side. As a result, even if rainwater seeps into the area surrounded by the two water-stopping members 21 (around the mounting section of the auxiliary device 5), the rainwater is guided along the inner surface of the eaves side of the standing pieces 23 (the inner surface of the folded half sections 23B on the eaves side) to the eaves side of the auxiliary device 5 and is discharged through the drainage section 26.

[0048] The two water-stopping members 21 may be fixed to the slate surface 3A with the eaves-side edges of the rising pieces 23 (the eaves-side edges of the eaves-side folded halves 23B) joined together. In this case, however, it is preferable that drainage holes (drainage portions) be provided near the joints between the eaves-side edges. As a result, even if rainwater seeps into the area surrounded by the two water-stopping members 21, the rainwater will be quickly drained through the drainage holes, just as in the first embodiment.

[0049] Next, a description will be given of the procedure for repairing the roof 1 in the first embodiment. Note that procedures other than the repair work around the auxiliary tool 5 are not directly related to the present invention, and therefore will not be described here.

[0050] (Repair Procedure I) First, as shown in FIG. 5, the roofing material for renovation 4(C1) is attached to the surface 3A of a row of decorative slates 3(P1) aligned in the girder direction on the ridge side of the auxiliary tool 5. Specifically, the ridge-side insertion portion 11 of the roofing material for renovation 4(C1) is inserted from the eaves side into the overlapping portion 3R between the ridge-side decorative slate 3(P1) and a decorative slate further ridge-side (not shown), and the eaves-side folded portion 13 is engaged with the eaves-side end 7 of the ridge-side decorative slate 3(P1) from the eaves side. Although not shown, adhesive is applied to the surface 3A of the decorative slate 3(P1) before attaching the roofing material for renovation 4(C1). This adhesively secures the roofing material for renovation 4(C1) to the surface 3A of the ridge-side decorative slate 3(P1).

[0051] Next, as shown in Figure 6, the girder-side end portions 14 of the two target roofing materials 4 (C2) for repair are cut as described above. Then, adhesive 27 is applied to the surface 3A of the eaves-side decorative slate 3 (P2) where the auxiliary tool 5 is installed, and the two target roofing materials 4 (C2) for repair are attached to the surface 3A of the eaves-side decorative slate 3 (P2) side by side on the outer girders of the auxiliary tool 5 so that the end faces of the cut portions butt against each other in the girder direction. Specifically, the ridge-side insertion portion 11 of the target roofing material 4 (C2) for repair is inserted from the eaves side into the overlapping portion 3R between the ridge-side decorative slate 3 (P1) and the eaves-side decorative slate 3 (P2) on the outer girders of the auxiliary tool 5, and the eaves-side fold portion 13 is engaged with the eaves-side end portion 7 of the eaves-side decorative slate 3 (P2) from the eaves side. As a result, as shown in FIG. 7, the two target roof materials 4 (C2) for renovation each define an interference avoidance space 20 around the auxiliary tool 5, and the surface 3A of the decorative slate 3 (P2) on the eaves side The substrate is glued and fixed to the substrate.

[0052] Thereafter, as shown in FIG. 8, the water-stopping members 21 are attached near the interference avoidance space 20. Specifically, the two water-stopping members 21 are arranged near the outer periphery of the auxiliary tool 5 with the inner surfaces (L-shaped concave portions) of the rising pieces 23 facing the auxiliary tool 5 from the girder direction, and the fixing pieces 22 are fixed to the surface 3A of the decorative slate 3 (P2) on the eaves side. At this time, the fixing piece 22 on the ridge side is inserted into the gap 25 of the end surface of the cut portion facing the interference avoidance space 20. Although not shown, adhesive is applied to the back surface of the fixing piece 22 before the water-stopping members 21 are arranged near the outer periphery of the auxiliary tool 5. As a result, as shown in FIG. 4, the two water-stopping members 21 are each adhesively fixed to the surface 3A of the decorative slate 3 (P2) on the eaves side exposed to the interference avoidance space 20 so as to surround the outer periphery of the auxiliary tool 5. This completes the main renovation work around the auxiliary tool 5.

[0053] When fixing the water-stopping member 21 to the slate surface 3A as described above, the ridge-side fixing piece 22 may be coated with adhesive on both the front and back sides and then inserted into the gap 25, or adhesive may be applied to the inner surface of the gap 25 in advance (the slate surface 3A or the back side of the renovation roof material 4), and then the ridge-side fixing piece 22 may be inserted into the gap 25.

[0054] Furthermore, in the above-mentioned renovation procedure I, the target renovation roof material 4 was first installed on the surface 3A of the decorative slate 3 on the eaves side, with an interference avoidance space 20 in place to prevent interference with the auxiliary device 5, and then the water-stopping member 21 was attached near the outer periphery of the auxiliary device 5; however, the water-stopping member 21 may also be first installed near the outer periphery of the auxiliary device 5, and then the target renovation roof material 4 may be installed on the surface 3A of the decorative slate 3 on the eaves side, with an interference avoidance space 20 in place to prevent interference with the auxiliary device 5.

[0055] (Renovation Procedure II) Specifically, as shown in Figure 5, first, as in the above-mentioned renovation procedure I, the renovation roof material 4 (C1) is attached to the surface 3A of a row of decorative slates 3 (P1) lined up in the girder direction on the ridge side of the auxiliary device 5.

[0056] Next, as shown in Figure 9, the water-stopping members 21 are attached to the surface 3A of the decorative slate 3 (P2) on the eaves side where the auxiliary tool 5 is provided. Specifically, the two water-stopping members 21 are arranged near the outer periphery of the auxiliary tool 5 with the inner surfaces (concave portions of the L-shapes) of the rising pieces 23 facing the auxiliary tool 5 from the girder direction, and the fixing pieces 22 are fixed to the surface 3A of the decorative slate 3 (P2) on the eaves side. Although not shown, adhesive is applied to the back surface of the fixing pieces 22 before the water-stopping members 21 are arranged near the outer periphery of the auxiliary tool 5. As a result, the two water-stopping members 21 are each adhesively fixed to the surface 3A of the decorative slate 3 (P2) on the eaves side.

[0057] Then, as shown in FIG. 10, the girder-side end portions 14 of the two target roofing materials 4(C2) for renovation are cut in the same manner as in the above-mentioned renovation procedure I. Then, adhesive 27 is applied to the surface 3A of the eaves-side decorative slate 3(P2) where the auxiliary tool 5 is installed, and the two target roofing materials 4(C2) for renovation are attached to the surface 3A of the eaves-side decorative slate 3(P2) in a line on the outer girder side of the auxiliary tool 5 so that the end faces of the cut portions butt against each other in the girder direction. The specific method of attaching the target roofing materials 4(C2) for renovation to the eaves-side decorative slate 3(P2) is the same as in the renovation procedure I. As a result, as shown in FIG. 4, the two target roofing materials 4(C2) for renovation are each adhesively fixed to the surface 3A of the eaves-side decorative slate 3(P2), defining an interference avoidance space 20 around the auxiliary tool 5. At this time, the fixing piece 22 on the ridge side of the waterproofing member 21 is fixed at a position sandwiched between the roof material for repair 4 (C2) and the slate surface 3A. This completes the main repair work around the auxiliary tool 5.

[0058] In addition, when fixing the target roofing material for repair 4 (C2) to the surface 3A of the decorative slate 3 (P2) on the eaves side as described above, the adhesive 27 is applied to the slate surface 3 as shown in FIG. In addition to the above, it is preferable that the coating be applied to the surface of the fixing piece 22 on the ridge side of the water-stopping member 21. This allows the fixing piece 22 on the ridge side to be adhesively fixed to both sides of the roofing material for renovation 4 and the decorative slate 3, making it even more difficult for the water-stopping member 21 to come off the roof 1. It also more reliably prevents rainwater flowing down the outer surface of the ridge side of the rising piece 23 (the outer surface of the ridge-side folded half portion 23A) from seeping through the gap 25 at the end face of the cut portion to the back side of the roofing material for renovation 4.

[0059] As described above, the renovation structure of the roof 1 in the first embodiment is a renovation structure of the roof 1 in which thin decorative slates (roofing material) 3 are installed in a stepped pattern in the eaves-ridge direction, and auxiliary functional equipment 5 is installed on the surface 3A of the decorative slates (roofing material) 3, and the renovation roof material 4 having a ridge-side insertion portion 11, a decorative surface portion 12, and an eaves-side fold portion 13 is installed on the surface 3A of the decorative slates (roofing material) 3 with an interference avoidance space 20 provided so as not to interfere with the auxiliary equipment 5.

[0060] According to this structure, even if auxiliary equipment 5 for functional equipment is installed on the surface 3A of the decorative slate (roofing material) 3, the renovation roofing material 4 can be installed on the surface 3A of the decorative slate (roofing material) 3 without removing the auxiliary equipment 5, avoiding the auxiliary equipment 5, thereby enabling smooth re-roofing of the roof 1.

[0061] In the first embodiment, the interference avoidance space 20 is provided with an opening at least on the eaves side. With this structure, even if the auxiliary tool 5 is provided near the eaves side end 7 of the slate surface 3A, the roof repair material 4 can be easily installed while avoiding the auxiliary tool 5, making it possible to re-roof the roof 1 more smoothly.

[0062] Furthermore, in the first embodiment, the interference avoidance space 20 is defined by cutting the girder side end 14 of the roof material for renovation 4. With this structure, the interference avoidance space 20 can be easily defined at the construction site in accordance with the placement of the auxiliary tool 5, making it possible to re-roof the roof 1 even more smoothly.

[0063] Furthermore, in the first embodiment, a water-stopping member 21 is provided near the interference avoidance space 20. This structure can prevent rainwater that has flowed down from the ridge side into the interference avoidance space 20 from reaching the attachment portion of the auxiliary device 5, and therefore it is also possible to maintain the waterproofness of the roof 1.

[0064] Furthermore, in the first embodiment, the water-stopping member 21 is provided near the ridge side of the auxiliary device 5. This structure more effectively prevents rainwater that has flowed down from the ridge side into the interference avoidance space 20 from reaching the attachment portion of the auxiliary device 5, further improving the waterproofing of the roof 1.

[0065] Furthermore, in the first embodiment described above, the water-stopping member 21 is provided along the edge of the roof material for renovation 4 facing the interference avoidance space 20. This structure makes it possible to prevent rainwater that has flowed down from the ridge side into the interference avoidance space 20 from seeping through the gap 25 at the edge of the roof material for renovation 4 facing the interference avoidance space 20 to the back side of the roof material for renovation 4, thereby further improving the waterproofness of the roof 1.

[0066] Furthermore, in the first embodiment, the water-stopping member 21 is provided so as to surround the outer periphery of the auxiliary device 5, and a drainage section 26 is provided on the eaves side. This structure can prevent rainwater from flowing down from the ridge side into the interference avoidance space 20, as well as rainwater spraying up from the eaves side from reaching the mounting section of the auxiliary device 5. Moreover, even if rainwater seeps into the area surrounded by the water-stopping member 21, the rainwater is drained to the eaves side of the auxiliary device 5 through the drainage section 26. This further improves the waterproofing of the roof 1.

[0067] Moreover, in the first embodiment, the water-stopping member 21 includes a fixing piece 22 and an upright piece 23 that is provided upright near the ridge side of the auxiliary tool 5. Furthermore, at least a part of the fixing piece 22 of the water-stopping member 21 is inserted and fixed into the gap 25 between the decorative slate (roofing material) 3 and the roofing material for renovation 4. This structure more effectively prevents rainwater that has flowed down from the ridge side into the interference avoidance space 20 from reaching the mounting portion of the auxiliary tool 5. It also prevents rainwater that has flowed down from the ridge side into the interference avoidance space 20 from seeping through the gap 25 to the back side of the roofing material for renovation 4. This further improves the waterproofness of the roof 1.

[0068] Furthermore, the method of renovating a roof 1 in the first embodiment described above is a method of renovating a roof 1 in which thin decorative slates (roofing material) 3 are installed in a stepped pattern in the eaves-ridge direction, and auxiliary functional equipment 5 is installed on the surface 3A of the decorative slates (roofing material) 3, and a renovation roof material 4 having a ridge-side insertion portion 11, a decorative surface portion 12, and an eaves-side fold portion 13 is installed on the surface 3A of the decorative slates (roofing material) 3 with an interference avoidance space 20 provided so as not to interfere with the auxiliary equipment 5.

[0069] According to this method, even if auxiliary equipment 5 for functional equipment is installed on the surface 3A of the decorative slate (roofing material) 3, the roofing material for renovation 4 can be installed on the surface 3A of the decorative slate (roofing material) 3 without removing the auxiliary equipment 5, avoiding the auxiliary equipment 5, thereby enabling smooth re-roofing of the roof 1.

[0070] In the first embodiment, the girder-side end 14 of the roofing material 4 for repair is cut to provide the interference avoidance space 20. This method makes it possible to easily provide the interference avoidance space 20 at the construction site in accordance with the placement of the auxiliary tool 5, thereby enabling the roof 1 to be re-roofed more smoothly.

[0071] Furthermore, in the first embodiment, a water-stopping member 21 is provided near the interference avoidance space 20. This method can prevent rainwater that has flowed down from the ridge side into the interference avoidance space 20 from reaching the attachment portion of the auxiliary device 5, and therefore it is also possible to maintain the waterproofness of the roof 1.

[0072] Furthermore, in the renovation procedure I of the first embodiment, the renovation roofing material 4 is applied to the surface 3A of the decorative slate (roofing material) 3, and then the water-stopping member 21 is installed. With this method, the water-stopping member 21 is less likely to get in the way when the renovation roofing material 4 is applied to the surface 3A of the decorative slate (roofing material) 3, and when installing the water-stopping member 21, it is easy to position it by using the end face of the cut portion of the renovation roofing material 4 on the interference avoidance space 20 side as a reference, so that the roof 1 can be re-roofed more smoothly.

[0073] Alternatively, in the renovation procedure II of the first embodiment, after the water-stopping member 21 is installed, the renovation roofing material 4 is applied to the surface 3A of the decorative slate (roofing material) 3. According to this method, the water-stopping member 21 can be installed in accordance with the arrangement of the auxiliary tool 5 before the renovation roofing material 4 is applied to the surface 3A of the decorative slate (roofing material) 3, so that the roof 1 can be re-roofed in a more appropriate construction state.

[0074] <Second embodiment> In the first embodiment described above, the interference avoidance space 20 is formed by diagonally cutting (cutting off) the girder side end portions 14 of the two target renovation roof materials 4 that are adjacent to each other in the girder direction, but it may also be formed by cutting (cutting off) the girder side end portions 14 (ends that butt together in the girder direction) of one or both of the two renovation roof materials 4 in the eaves-ridge direction.

[0075] In detail, as shown in FIG. 11, in the second embodiment of the present invention, two target buildings for renovation are One or both of the girder side end portions 14 of the root material 4 (the end portions that butt against the girder direction) are cut in the eaves-ridge direction, and by arranging the end faces of these cut portions (or the end faces of the cut portions and the girder side end portions 14) facing each other in the girder direction, an interference avoidance space 20 that is rectangular in plan view and opens on both sides of the eaves ridge is defined in the target roof material 4 to be renovated.

[0076] The water-stopping member 21 also includes a fixing piece 22 having a generally rectangular shape in plan view, with a V-shaped notch 22C formed in its eaves-side edge, and a rising piece 23 extending in a V-shape along the cut end surface of the notch 22C. The rising piece 23 is fixed to the slate surface 3A near the ridge side of the auxiliary tool 5, with the inner surface (the concave portion of the V) of the rising piece 23 facing the auxiliary tool 5 from the ridge direction. The rising piece 23 is also arranged in a V-shape on the outer ridge side of the auxiliary tool 5, with both girder-side edges approximately aligned with the cut end surface (or girder-side end 14) of the roofing material 4 for renovation. Therefore, rainwater flowing from the ridge side of the roof 1 along the surface of the roofing material 4 for renovation into the interference avoidance space 20 is diverted toward the outer girder of the auxiliary tool 5 and flows toward the eaves side from the attachment portion of the auxiliary tool 5, as in the first embodiment. This provides the same advantageous effects as the first embodiment.

[0077] As with renovation method II of the first embodiment, in the roof 1 of the second embodiment, after the waterproofing member 21 is installed, the renovation roofing material 4 is applied to the surface 3A of the decorative slate 3. At this time, both girder side ends 28 of the fixing pieces 22 are covered with the renovation roofing material 4. It is also preferable that the adhesive that fixes the renovation roofing material 4 to the surface 3A of the decorative slate 3 is also applied to the surface of the girder side end 28 of the fixing pieces 22.

[0078] In addition, in the above second embodiment, the interference avoidance space 20 is defined by cutting the girder side end portions 14 of one or both of the two target renovation roof materials 4 that are adjacently lined up in the girder direction in the eaves-ridge direction, but the interference avoidance space 20 may also be defined by arranging the two renovation roof materials 4 that are adjacently lined up in the girder direction at a predetermined distance in the girder direction (for example, a distance that is significantly wider than the girder-directional dimension (width dimension) of the auxiliary device 5, as shown in Figure 11).

[0079] <Third embodiment> In the second embodiment described above, the water-stopping member 21 is configured to divert rainwater flowing down from the ridge side into the interference avoidance space 20 toward the outer girder of the auxiliary device 5 by means of the rising piece 23 arranged in a V shape on the ridge side of the auxiliary device 5, but the shape of the rising piece 23 is not particularly limited as long as it can appropriately divert rainwater flowing down from the ridge side into the interference avoidance space 20 toward the outer girder of the auxiliary device 5. For example, the rising piece 23 may be formed in the shape of a plate that slopes from one side of the girder direction to the other in the eaves-ridge direction.

[0080] Specifically, as shown in FIG. 12 , in the third embodiment of the present invention, a water-stopping member 21 includes a fixing piece 22 having a generally trapezoidal shape in plan view, whose eaves-side edge slopes from one side of the girder toward the eaves-ridge direction, and a rising piece 23 extending along the eaves-side edge. The rising piece 23 is fixed to the slate surface 3A near the ridge side of the auxiliary device 5, with the eaves-side slope of the rising piece 23 facing the auxiliary device 5 from the ridge direction. The rising piece 23 is also positioned on the outer ridge side of the auxiliary device 5, sloping toward the girder side, with both girder-side edges approximately aligned with the cut end faces (or girder-side ends 14) of the roofing material 4 for renovation. Therefore, rainwater flowing from the ridge side of the roof 1 down the surface of the roofing material 4 for renovation into the interference avoidance space 20 is deflected toward one side of the outer girder of the auxiliary device 5 and flows toward the eaves side of the attachment point of the auxiliary device 5. This achieves the same effects as the first and second embodiments.

[0081] In addition, in the roof 1 of the third embodiment, similarly to the repair method II of the first embodiment, after the waterproofing member 21 is provided, the repair roofing material 4 is applied to the surface 3A of the decorative slate 3.

[0082] <Fourth embodiment> In the repair structure for roof 1 of the first embodiment described above, interference avoidance space 20 is defined by cutting the eaves-side corner of girder-side end 14 of roofing material 4 at an angle, but the shape of the cut portion is not particularly limited as long as it is possible to appropriately avoid interference with auxiliary device 5. For example, interference avoidance space 20 may be defined by cutting the eaves-side corner of girder-side end 14 of roofing material 4 in a substantially V-shape, or by cutting it in a substantially quarter-circular arc shape.

[0083] In more detail, for example, as shown in Figure 13, in the fourth embodiment of the present invention, the girder side end portions 14 (end portions that butt together in the girder direction) of the two target roof materials 4 for renovation are each cut in an approximately V-shape from the midpoint in the eaves-ridge direction to the eaves side end portion (eaves side fold portion 13), and by arranging these cut portions facing each other in the girder direction, an interference avoidance space 20 is defined in the target roof material 4 for renovation that is approximately home plate-shaped (pentagonal) in plan view, with a V-shaped ridge side edge and opening on the eaves side.

[0084] The water-stopping member 21 also includes a fixing piece 22 that is generally rectangular in plan view and has a notch 22C formed in its eaves-side edge that is generally the same shape as the interference avoidance space 20, and a rising piece 23 that is provided in a V-shape and rises along the ridge-side edge of the notch 22C. The rising piece 23 is fixed around the auxiliary tool 5 on the slate surface 3A with the inner surface (the concave portion of the V) of the rising piece 23 facing the auxiliary tool 5 from the ridge direction. The fixing piece 22 is fixed in a position where both girder-side ends 28 are inserted into the gap 25 between the roofing material 4 for repair and the slate surface 3A from the end face of the cut portion (or girder-side end 14) of the roofing material 4 for repair. The rising piece 23 is arranged in a V-shape on the outer ridge side of the auxiliary tool 5, with both girder-side ends approximately aligned with the end face of the cut portion (or girder-side end 14) of the roofing material 4 for repair. Therefore, rainwater flowing down from the ridge side of the roof 1 along the surface of the roof material for renovation 4 into the interference avoidance space 20 is diverted in the direction of the outer beam of the auxiliary device 5, as in the first embodiment, and flows toward the eaves side of the mounting part of the auxiliary device 5. This provides the same effects as the first embodiment.

[0085] As with renovation method II of the first embodiment, in the roof 1 of the fourth embodiment, after the waterproofing member 21 is installed, the renovation roofing material 4 is applied to the surface 3A of the decorative slate 3. At this time, both girder side ends 28 of the fixing pieces 22 are covered with the renovation roofing material 4. It is also preferable that the adhesive that fixes the renovation roofing material 4 to the surface 3A of the decorative slate 3 is also applied to the surface of the girder side end 28 of the fixing pieces 22.

[0086] <Fifth embodiment> In the first embodiment, the interference avoidance space 20 is provided with an opening on the eaves side, but it may be provided with an opening on the ridge side. Also, in the first embodiment, the interference avoidance space 20 is defined by cutting the girder side end 14 of the roof material for renovation 4, but it may be defined by cutting out a part of the roof material for renovation 4.

[0087] 14, in the fifth embodiment of the present invention, a cutout 30 that is roughly like a home plate (pentagonal) in plan view and is wider than the dimension (width) in the girder direction of the auxiliary device 5 is formed in the ridge-side end (ridge-side insertion portion 11) of one target roofing material for renovation 4, and the ridge-side insertion portions 11 that extend in one and other girder directions across this cutout 30 are inserted from the girder side into the overlapping portions 3R of the decorative slates 3 lined up in the eaves-ridge direction, and the eaves-side fold portion 13 is attached to the decorative slate 3 by engaging the eaves-side end 7 of the decorative slate 3 from the eaves side. In other words, the cutout 30 becomes an interference avoidance space 20 that opens on the ridge side.

[0088] The water-stopping member 21 is configured in the same manner as the water-stopping member 21 of the second embodiment, and is fixed to the slate surface 3A near the ridge side of the auxiliary tool 5 with the inner surface (V-shaped concave portion) of the rising piece 23 facing the auxiliary tool 5 from the ridge direction. The rising piece 23 is also arranged in a V-shape on the outer ridge side of the auxiliary tool 5 with both girder side edges approximately aligned with the girder side edges of the cutout portion 30. This provides the same effects as those of the first and second embodiments.

[0089] Moreover, in the fifth embodiment, the interference avoidance space 20 is provided with an opening at least on the ridge side. This structure allows the repair roofing material 4 to be easily applied to the decorative slates 3 from the eaves side without interfering with the auxiliary tool 5, making it possible to re-roof the roof 1 more smoothly.

[0090] Furthermore, in the fifth embodiment, the interference avoidance space 20 is defined by cutting out a portion of the roof material for renovation 4. That is, in the fifth embodiment, the interference avoidance space 20 is provided by cutting out a portion of the roof material for renovation 4. According to this structure and method, the interference avoidance space 20 can be easily defined at the construction site in accordance with the arrangement of the auxiliary tools 5, making it possible to re-roof the roof 1 even more smoothly.

[0091] As with renovation method II of the first embodiment, in the roof 1 of the fifth embodiment, after the waterproofing member 21 is installed, the renovation roofing material 4 is applied to the surface 3A of the decorative slate 3. At this time, both girder side ends 28 of the fixing pieces 22 are covered with the renovation roofing material 4. It is also preferable that the adhesive that fixes the renovation roofing material 4 to the surface 3A of the decorative slate 3 is also applied to the surface of the girder side end 28 of the fixing pieces 22.

[0092] In the repair structure for roof 1 of the fifth embodiment described above, interference avoidance space 20 is defined by cutting out a roughly U-shaped notch in the ridge side end of roofing material 4 for repair, but the shape of the notch 30 is not particularly limited as long as it is possible to appropriately avoid interference with auxiliary device 5. For example, interference avoidance space 20 may be defined by cutting out a roughly V-shaped notch in the ridge side end of roofing material 4 for repair, or by cutting out a roughly semicircular arc shape.

[0093] <Other> In the first embodiment described above, a water-stopping member 21 is provided near the interference avoidance space 20, but due to the mounting structure of the auxiliary device 5, even if rainwater flowing down onto the slate surface 3A of the interference avoidance space 20 reaches the mounting portion of the auxiliary device 5, if there is no risk of it penetrating to the back side of the decorative slate 3, the water-stopping member 21 does not necessarily have to be provided.

[0094] Furthermore, in the first embodiment described above, the water-stopping member 21 is provided near the girder side of the auxiliary device 5 with the inner surface (L-shaped concave portion) of the rising piece 23 facing the auxiliary device 5 from the girder direction, but as shown in Figure 15, the water-stopping member 21 may also be provided near the ridge side of the auxiliary device 5 with the inner surface of the rising piece 23 facing the auxiliary device 5 from the ridge direction (1).

[0095] Alternatively, the water-stopping member 21 may not be a frame formed separately from the roof material for renovation 4 as in the first embodiment, but may be formed by bending a standing piece at the end face of the cut portion of the roof material for renovation 4 that faces the interference avoidance space 20, or waterproof tape or a sealant (water-stopping agent) may be provided near the interference avoidance space 20. In these cases, however, it is preferable that the water-stopping member 21 be provided along substantially the entire length of the end face of the cut portion.

[0096] Specifically, as shown in Figure 16, the water-stopping member 21 is a rising piece formed by bending the end (cut end face) of the repair roofing material 4 facing the interference avoidance space 20, and is formed along the cut end face from the eaves-side folded portion 13 of the repair roofing material 4 on the ridge side of the auxiliary device 5 to the eaves-side folded portion 13 of the target repair roofing material 4 (2). Note that in Figure 16, the ridge-side edges of each rising piece are intentionally spaced apart to make it easier to understand that the water-stopping member 21 is a rising piece formed by bending the end face of the repair roofing material 4, but when waterproofing is taken into consideration, it is preferable to join the ridge-side edges of the rising pieces and apply a sealing material such as a sealant or waterproof tape to the joint.

[0097] Alternatively, as shown in Figure 17, the water-stopping member 21 is, for example, a waterproof tape (so-called butyl tape) in which a butyl rubber adhesive is applied to the backside of a polyester-based strip-shaped nonwoven fabric substrate, and is attached near the ridge side of the auxiliary tool 5 on the slate surface 3A exposed in the interference avoidance space 20. More specifically, the water-stopping member 21 is attached along the end face of the cut portion from the eaves side fold 13 of the roofing material 4 for renovation on the ridge side of the auxiliary tool 5 to the eaves side fold 13 of the target roofing material 4 for renovation, so as to cover the gap 25 at the end face of the cut portion of the roofing material 4 for renovation facing the interference avoidance space 20 (3).

[0098] 18, the water-stopping member 21 is a silicone-based or urethane-based sealant, which is applied to the slate surface 3A exposed to the interference avoidance space 20 near the ridge side of the auxiliary tool 5. More specifically, the water-stopping member 21 is applied along the cut end surface from the eaves side fold 13 of the roofing material 4 for renovation on the ridge side of the auxiliary tool 5 to the eaves side fold 13 of the target roofing material 4 for renovation, so as to seal the gap 25 at the cut end surface of the roofing material 4 for renovation facing the interference avoidance space 20 (4).

[0099] As described above, in the above embodiments (3) and (4), the water-stopping member 21 is made of waterproof tape. Alternatively, the water-stopping member 21 is made of a water-stopping agent. This eliminates the need to prepare the water-stopping member 21 by sheet metal processing, as in the first embodiment, and therefore, even workers without sheet metal processing skills can easily install it. In addition, rainwater that has flowed down into the interference avoidance space 20 can be prevented from seeping through the gap 25 at the end face of the cut portion to the back side of the roof material for renovation 4, further improving the waterproofness of the roof 1.

[0100] Furthermore, in the above embodiments (1) to (4), the water-stopping member 21 is provided along substantially the entire length of the end (end face of the cut portion) of the roof material for repair 4 facing the interference avoidance space 20. This more effectively prevents rainwater that has flowed down into the interference avoidance space 20 from seeping through the gaps 25 at the end face of the cut portion to the back side of the roof material for repair 4, further improving the waterproofness of the roof 1.

[0101] 19, the water-stopping member 21 is a waterproof tape and sealant, and is provided to surround the outer periphery of the auxiliary device 5. More specifically, the waterproof tape 21B is applied along the end face of the cut portion of the roofing material 4 for renovation facing the interference avoidance space 20 and along the eaves side end (eaves side fold portion 13) of the roofing material 4 for renovation on the ridge side. Furthermore, the sealant 21C is applied along the eaves side edge of the slate surface 3A exposed to the interference avoidance space 20 (5).

[0102] According to the above embodiment (5), rainwater flowing down into the interference avoidance space 20 can be prevented from penetrating the back side of the renovation roof material 4 or the back side of the decorative slate 3 from the end face of the cut portion, the eaves side end of the renovation roof material 4 on the ridge side, or the eaves side edge of the slate surface 3A exposed in the interference avoidance space 20, thereby further improving the waterproofness of the roof 1.

[0103] Furthermore, the water-stopping member 21 may be a combination of a frame made of plate pieces as in the above embodiment, a waterproof tape, and a sealant (water-stopping agent). Specifically, for example, as shown in FIG. 20, a water-stopping member 21A having a generally L-shape in plan view, similar to the water-stopping member 21 of the first embodiment, is provided to surround the outer periphery of the auxiliary tool 5. A sealant 21C is applied along (almost along the entire length of) the end face of the cut portion of the roof material 4 for repair facing the interference avoidance space 20. Alternatively, a waterproof tape 21B is applied. Alternatively, both (the waterproof tape 21B and the sealant 21C) are applied (6).

[0104] Alternatively, as shown in FIG. 21, a flat roofing material may be provided at the ridge end of the roofing material for repair 4 in the same manner as in the fifth embodiment. In a roof 1 provided with a cutout 30 that is roughly shaped like home plate (pentagonal) in plan view, a water-stopping member 21A having a configuration similar to that of the water-stopping member 21 of the fifth embodiment is provided on the ridge side of the auxiliary tool 5 as a water-stopping member. Furthermore, a waterproof tape 21B is applied along the eaves-side edge of the cut end surface of the cutout 30, or a sealant 21C is applied, or both (waterproof tape 21B and sealant 21C) are applied (7).

[0105] Alternatively, as shown in FIG. 22 , in the case of a roof 1 in which auxiliary members 5 are installed across multiple rows (e.g., two rows) of decorative slates 3 aligned in the eaves-ridge direction, an interference avoidance space 20 having a V-shaped ridge edge and a generally home plate-like (pentagonal) shape in plan view, opening toward the eaves, is defined between the girder-side ends 14 of the roofing materials 4 for renovation aligned near the girder side of the auxiliary members 5, as in the fourth embodiment. Furthermore, an interference avoidance space 20 having a rectangular shape in plan view and opening toward both sides of the eaves-ridge is defined between the girder-side ends 14 of the roofing materials 4 for renovation aligned near the girder side of the auxiliary members 5, as in the second embodiment. Furthermore, a water-stopping member 21A having a generally U-shaped shape in plan view, with its central portion curved in a V-shape toward the ridge side, is provided near the ridge side of the auxiliary members 5. A waterproof tape 21B is applied along the end face of the roofing materials 4 for renovation aligned near the girder side of the auxiliary members 5, on the side facing the auxiliary members 5. Alternatively, a sealant 21C is applied, or both (waterproof tape 21B and sealant 21C) are applied (8). This further improves the waterproofing of the roof 1. [Explanation of symbols]

[0106] 1. Roof 3. Decorative slate (roofing material) 3A Slate surface (roofing surface) 4. Roofing materials for renovation 5. Assistive devices 11 Ridge side insertion part 12 Cosmetic area 13 Eaves side fold 25 Interference avoidance space

Claims

1. A roof renovation structure in which thin plate-shaped roofing materials are installed in a stepped manner in the eaves ridge direction, and auxiliary functional equipment is installed on the surface of the roofing materials, A roofing material for repair having a ridge-side insertion portion, a decorative surface portion, and an eaves-side folded portion is installed on the surface of the roofing material with an interference avoidance space provided so as not to interfere with the auxiliary tool, a water-stopping member is provided near the interference avoidance space; A roof renovation structure characterized in that the water-stopping member comprises a fixed piece and a standing piece that stands upright near the ridge side of the auxiliary device, and at least a portion of the fixed piece is inserted into and fixed in the gap between the roof material and the roof material to be repaired.

2. A roof renovation structure in which thin plate-shaped roofing materials are layered in a stepped manner in the eaves ridge direction, and auxiliary functional equipment is installed on the surface of the roofing materials, A roofing material for repair having a ridge-side insertion portion, a decorative surface portion, and an eaves-side folded portion is installed on the surface of the roofing material with an interference avoidance space provided so as not to interfere with the auxiliary tool, a water-stopping member is provided near the interference avoidance space; A roof renovation structure characterized in that the water-stopping member is formed by bending the end of the renovation roof material facing the interference avoidance space.

3. 3. The roof renovation structure according to claim 1, wherein the interference avoidance space is provided with an opening at least on the eaves side.

4. A roof renovation structure as described in any one of claims 1 to 3, characterized in that the interference avoidance space is provided with an opening at least on the ridge side.

5. A roof renovation structure as described in any one of claims 1 to 4, characterized in that the interference avoidance space is defined by cutting the girder side end of the renovation roof material.

6. A roof renovation structure as described in any one of claims 1 to 4, characterized in that the interference avoidance space is defined by cutting out a portion of the roof material for renovation.

7. A roof renovation structure as described in any one of claims 1 to 4, characterized in that the interference avoidance space is defined by arranging two of the renovation roof materials adjacent to each other in the girder direction at a predetermined distance from each other.

8. 3. The roof repair structure according to claim 1, wherein the waterproofing member is provided near the ridge side of the auxiliary tool.

9. 9. The roof renovation structure according to claim 1, 2 or 8, characterized in that the water-stopping member is provided along an edge of the roof material for renovation facing the interference avoidance space.

10. 9. A roof renovation structure as described in claim 1, 2 or 8, characterized in that the water-stopping member is provided along approximately the entire length of the end of the roof material for renovation facing the interference avoidance space.

11. A roof renovation structure described in any one of claims 1 to 10, characterized in that the water-stopping member is arranged to surround the outer periphery of the auxiliary device and has a drainage portion on the eaves side.

12. A roof renovation method for constructing the roof renovation structure according to claim 1, comprising: A roof repair method characterized by applying the repair roof material to the surface of the roof material and then providing the water-stopping member.

13. A roof renovation method for constructing the roof renovation structure according to claim 1, comprising: A roof repair method characterized by applying the repair roof material to the surface of the roof material after providing the water-stopping member.

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