Roof covering structure and roof covering method

Abstract

To provide a roof cover structure capable of covering a deteriorated slate roof without blocking a ventilation layer in an exterior wall structure. [Solution] The roof cover structure 10 is composed of a new roofing material 12 arranged to cover the surface of the existing roof structure C, a first breathable material 14 arranged along the exterior wall on the top surface of the existing rain flashing metal plate 114 via the new roofing material 12, a second breathable material 16 arranged along the water gradient of the existing roof structure C on the top surface of the existing roofing material 110 via the new roofing material 12, a new roofing material 18 arranged from the top surface of the first breathable material 14 to the top surface of the second breathable material 16, a new base material 20 arranged on the top surface of the first breathable material 14 via the new roofing material 18, and a new rain flashing metal plate 22 arranged on the top surface of the new base material 20, with its edge on the exterior wall side sealed to the surface of the exterior wall.

Description

[Technical Field]

[0001] The present invention relates to a covering structure and a covering method for covering an existing deteriorated slate roof. [Background technology]

[0002] Ceramic siding (exterior wall material) and slate roofs as shown in FIGS. 8 and 9 have been widely used as exterior wall and roof structures for detached houses (see, for example, FIG. 17 of Patent Document 1).

[0003] First, in the exterior wall structure A, a moisture-permeable waterproof sheet 1 is attached along the wall surface, and ceramic siding 3 is installed on the outer surface of this moisture-permeable waterproof sheet 1 via furring strips 2. This creates an air-permeable layer B between the moisture-permeable waterproof sheet 1 and the ceramic siding 3, which allows rainwater to be drained and ensures breathability, minimizing deterioration of the wall surface due to moisture.

[0004] Next, as the roof structure C, a roofing material (waterproof sheet material) 5 is laminated on the surface of the roof sheathing board 4, and a slate roof material (roofing material) 6 is laid on the surface of the roofing material 5.

[0005] At this time, at the joint between the roof structure C and the exterior wall structure A, a cross-section plate 7, which is a long material with a rectangular cross section, is placed on the upper end of the slate roof material 6 placed at the top, and a rain flashing metal plate 8 is placed on its surface.

[0006] One end of this flashing metal sheet 8 rises almost vertically and penetrates to the back side of the moisture-permeable waterproof sheet 1 in the exterior wall structure A, and the other end reaches beyond the lower end of the crosspiece 7 and onto the surface of the slate roof material 6. This allows moisture and rainwater that has penetrated into the ventilation layer B of the exterior wall structure A to flow over the surface of the flashing metal sheet 8 and fall onto the surface of the slate roof material 6, preventing the moisture and rainwater from reaching the sheathing boards 4 of the roof structure C.

[0007] However, even with roof structure C, after a dozen years or so have passed since construction, the roofing material 5 will deteriorate and rainwater will penetrate the sheathing boards 4, which may cause corrosion of the sheathing boards 4 or leaks, so construction is being carried out to install a cover structure to cover the slate roof.

[0008] As shown in Figure 10, this cover structure involves installing a new roofing material (new roofing material) X on the surface of the existing slate roofing material 6 and rainproof metal sheet 8, and folding up the end of the new roofing material X facing the exterior wall to cover the outer surface of the lower end of the existing ceramic siding 3.

[0009] After that, the new roofing material X is sandwiched between the existing cross-boards 7 and flashing metal plates 8, and a support beam Y is placed on the surface of the new roofing material X. Then, the lightweight metal roofing material Z is placed on the surface of the existing slate roofing material 6, with the new roofing material X in between. The end of the lightweight metal roofing material Z on the support beam Y side forms a flashing section AA that extends upward, and the flashing section AA is designed to abut against the side of the support beam Y.

[0010] Finally, a new rain flashing metal sheet (new rain flashing metal sheet) BB is placed on the top surface of the receiving wood Y. The ceramic siding 3 side of this new rain flashing metal sheet BB is shaped to extend vertically upward along the outer surface of the ceramic siding 3, and sealing processing S is applied between the edge of the new rain flashing metal sheet BB and the outer surface of the ceramic siding 3. This sealing processing S prevents rainwater and the like from flowing in between the edge of the new rain flashing metal sheet BB and the outer surface of the ceramic siding 3. In addition, the part of the new rain flashing metal sheet BB that extends vertically upward is fixed to the exterior wall structure A with nails or the like.

[0011] In addition, the side of the new flashing metal plate BB facing the lightweight metal roofing material Z extends vertically downward along the side of the support beam Y, and is positioned so that its edge is almost in contact with the surface of the lightweight metal roofing material Z. Furthermore, the part of the new flashing metal plate BB that extends vertically downward is fixed to the side of the support beam Y together with the flashing part AA by nails or the like.

[0012] In this way, according to the conventional covering structure, the entire surface of the existing roof structure C is covered with the new roofing material X, and the support beam Y, the lightweight metal roofing material Z, and the new rainproof metal plate BB are arranged on the surface side of the new roofing material X, thereby making it possible to cover the slate roof. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Patent Application No. 2025-36352 Summary of the Invention [Problem to be solved by the invention]

[0014] However, with the previous cover structure, the new roofing material X, support beam Y, lightweight metal roofing material Z, and new rainproofing metal plate BB blocked the ventilation layer B in the exterior wall structure A, preventing rainwater and condensation water that had entered the ventilation layer B from being drained, which had a negative impact on the lifespan of the building and its thermal insulation and waterproofing performance.

[0015] The present invention has been made in consideration of such problems, and its purpose is to provide a roof covering structure and a roof covering method that can cover a deteriorated roof without blocking the ventilation layer B in the exterior wall structure A. [Means for solving the problem]

[0016] According to one aspect of the present invention, New roofing materials that are placed to cover the surface of the existing roof structure; A first breathable material that is placed along the exterior wall on the top surface of the existing rainproofing sheet metal via the new roofing material; A second breathable material is placed on the top surface of the existing roof material via the new roofing material along the water gradient of the existing roof structure; A new roofing material arranged from the upper surface of the first breathable material to the upper surface of the second breathable material; A new base material is placed on the upper surface of the first breathable material via the new roof material; a new flashing metal plate disposed on the upper surface of the new base material, the edge of which on the exterior wall side is sealed to the surface of the exterior wall; A roof covering structure is provided.

[0017] Preferably, At least one of the first breathable material and the second breathable material is a member that has breathability from one side surface to the other side surface along the surface of the existing roof structure.

[0018] Preferably, At least one of the first breathable material and the second breathable material has breathability ensured by arranging a plurality of non-breathable structural members at intervals from one another.

[0019] The roof structure further includes a fixing member for fixing the first breathable material and the new flashing metal plate to the existing roof structure, When the fixing member penetrates the first breathable material, the new rain flashing metal plate, and the new roofing material, a water-stopping material layer is positioned on the underside of the first breathable material, which is pulled into the fixing member to stop water from flowing between the new roofing material and the fixing member.

[0020] According to another aspect of the present invention, New roofing materials were placed to cover the surface of the existing roof structure. A first breathable material is placed along the exterior wall on the top surface of the existing rainproofing sheet metal via the new roofing material, A second breathable material is placed on the top surface of the existing roof material via the new roofing material along the water gradient of the existing roof structure; A new roofing material is placed from the upper surface of the first breathable material to the upper surface of the second breathable material, A new base material is placed on the upper surface of the first breathable material via the new roof material, A new rainproofing sheet metal is disposed on the upper surface of the new base material, The edge of the new flashing metal plate on the outer wall side is sealed against the surface of the outer wall. A roof covering method is provided. [Effects of the Invention]

[0021] According to the roof covering structure and covering method of the present invention, a first breathable material is placed along the exterior wall between the new roofing material and the new roofing material, and a second breathable material is placed along the water gradient of the existing roof structure.

[0022] This allows the ventilation layer in an existing exterior wall structure to communicate with the outside via the first breathable material and the second breathable material, thereby providing a roof covering structure and a roof covering method that can cover deteriorated roofing materials without blocking the ventilation layer. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a roof cover structure 10 according to the present embodiment, and an exterior wall structure A and a roof structure C to which the cover structure 10 is applied. [Figure 2] 1 is a cross-sectional view showing a roof cover structure 10 according to the present embodiment, and an exterior wall structure A and a roof structure C to which the cover structure 10 is applied. [Figure 3] FIG. 10 is a perspective view showing another example of the first breathable material 14. [Figure 4] FIG. 10 is a perspective view showing another example of the first breathable material 14. [Figure 5] 10A and 10B are a perspective view and a cross-sectional view showing another example of the first breathable material 14. FIG. [Figure 6] FIG. 10 is a perspective view showing another example of the first breathable material 14. [Figure 7] 1 is an enlarged cross-sectional view showing a first breathable material 14 and a water-stopping material layer 50 of a cover structure 10 according to a first modified example. [Figure 8] FIG. 1 is a perspective view showing a conventional exterior wall structure A and a roof structure C. [Figure 9]FIG. 1 is a cross-sectional view showing a conventional exterior wall structure A and a roof structure C. [Figure 10] FIG. 10 is a cross-sectional view showing a conventional cover structure. DETAILED DESCRIPTION OF THE INVENTION

[0024] (Construction of the previous exterior wall structure A and roof structure C) 1 and 2, in the exterior wall structure A and roof structure C to which the roof covering structure 10 according to this embodiment is applied, as described above, the exterior wall structure A is composed of a vapor-permeable waterproof sheet 100 arranged along the wall surface and an exterior wall material (for example, ceramic siding, metal siding, or resin siding) 104 arranged on the outer surface side of this vapor-permeable waterproof sheet 100 via furring strips 102. A ventilation layer B is formed between the vapor-permeable waterproof sheet 100 and the exterior wall material 104.

[0025] As described above, roof structure C is composed of roofing material (waterproof sheet material) 108 laminated on the surface of the roof sheathing board 106, roofing material 110 arranged on the surface of this roofing material 108, cross plate 112 which is a long material with a rectangular cross section arranged along the exterior wall at the upper end of the roofing material 110 arranged at the top, and rain guard metal plate 114 covered on the surface of cross plate 112.

[0026] As described above, one end of the flashing metal sheet 114 rises almost vertically and penetrates into the moisture-permeable waterproof sheet 100 in the exterior wall structure A, and the other end reaches the surface of the roof material 110 beyond the lower end of the crosspiece 112. This allows moisture and rainwater that has penetrated into the ventilation layer B of the exterior wall structure A to flow over the surface of the flashing metal sheet 114 and fall onto the surface of the roof material 110, preventing the moisture and rainwater from reaching the sheathing boards 106 of the roof structure C.

[0027] (Configuration of roof cover structure 10) The roof covering structure 10 of this embodiment roughly comprises a new roofing material 12, a first breathable material 14, a second breathable material 16, a new roofing material 18, a new base material 20, and a new rain guard metal sheet 22.

[0028] The new roofing material 12 is essentially a flexible, waterproof sheet material of the same quality as the existing roofing material (waterproof sheet material) 108. This new roofing material 12 completely covers the existing roof structure C. Furthermore, the upper end (above the water gradient) of the new roofing material 12 is positioned so that it reaches the lower end of the ventilation layer B of the existing exterior wall structure A. The upper end of the new roofing material 12 may be positioned further upward, for example, to reach the breathable waterproof sheet 100 of the exterior wall structure A. The new roofing material 12 may be made of asphalt or other breathable materials. When using a breathable new roofing material 12, it may be attached from the top surface of the existing roofing material 110 to the surface of the exterior wall material 104. In this case, the new roofing material 12 blocks the drainage route of rainwater and other substances from the ventilation layer B. However, the breathable new roofing material 12 ensures breathability, thereby preventing condensation due to moisture.

[0029] The first breathable material 14 is a member placed along the exterior wall on top of the existing flashing metal sheet 114 via the new roofing material 12. In this embodiment, a long plate material (e.g., Wootop (registered trademark) Vent Edge) is used that is breathable from one side (side "A" in FIG. 2: the side above the water gradient) to the other side (side "B" in FIG. 2: the side below the water gradient). Note that examples of the first breathable material 14 are not limited to these. For example, a hollow member with a square-shaped cross section may be used, as shown in FIG. 3, or a solid, long member with multiple through holes 24 formed therein, as shown in FIG. 4. Furthermore, a long, S-shaped member with multiple through holes 24 formed therein may be used, as shown in FIG. 5. Note that the first breathable material 14 may be made of resin, metal, wood, or the like.

[0030] As another example of the first breathable material 14, as shown in FIG. 6, a plurality of structural members 26 that do not have breathability (or may have breathability) may be arranged at intervals from each other, thereby ensuring breathability between adjacent structural members 26.

[0031] 1 and 2, the second breathable material 16 is a member that is placed on the top surface of the existing roof material 110 via the new roofing material 12, along the water gradient of the existing roof structure C, and in this embodiment, a long second structural member 28 (e.g., Wootop (registered trademark) Vent Edge) that is breathable from one side (the side marked "U" in FIG. 2: the side above the water gradient) downward to the other side (the side marked "E" in FIG. 2: the side below the water gradient) is used. By placing multiple second structural members 28 at intervals from each other, breathability is also ensured between adjacent second structural members 28.

[0032] Note that examples of the second breathable material 16 are not limited to this, and similar to the first breathable material 14, a hollow member with a square-shaped cross section may be used, or a solid, elongated member with multiple through-holes formed therein. Furthermore, although not shown, multiple non-breathable second structural members 28 may be arranged at intervals from each other to ensure breathability between adjacent second structural members 28. Note that resin, metal, wood, etc. may also be considered as materials for the second breathable material 16.

[0033] The new roofing material 18 is a lightweight metal roofing material that is placed from the upper surface of the first breathable material 14 to the upper surface of the second breathable material 16. The new roofing material 18 is not limited to being made of lightweight metal, and may be a horizontally laid metal roof, a horizontally laid metal roof with integrated insulation, or a slate roof, but because the cover structure 10 is a structure that is laid on top of the existing roof structure C, it is preferable to use a new roofing material 18 made of lightweight metal in order to reduce the burden on the entire roof structure C.

[0034] The new roofing material 18 according to this embodiment has a main body 30 having a predetermined thickness, and a thin plate portion 32 extending substantially horizontally from the main body portion 30. When the new roofing material 18 is installed, the main body portion 30 is placed on the top surface of the second breathable material 16, and the thin plate portion 32 is placed so as to cover the top surface of the first breathable material 14. This allows the new roofing material 18 to be fixed to the first breathable material 14 or the existing roof structure C by, for example, passing fixing members 34 such as screws or nails (described below) through the thin plate portion 32.

[0035] The new base material 20 is a member that is disposed on the upper surface of the first breathable material 14 via the new roofing material 18, and in this embodiment, a long metal member with an "S"-shaped cross section is disposed along the wall surface as the new base material 20. Of course, the material of the new base material 20 is not limited to this, and for example, a solid long wooden member or a hollow long member with a "R"-shaped cross section may be used. Also, a plurality of short members (not shown) may be arranged at intervals along the wall surface, and this may be used as the new base material 20.

[0036] In this embodiment, fixing members 34 such as screws or nails are passed through the new base material 20, the thin plate portion 32 of the new roof material 18, the first breathable material 14, and the new roofing material 12, and are fixed to the rain guard metal plate 114 and cross plate 112 in the existing roof structure C.

[0037] The new flashing metal sheet 22 is a member that is disposed on the upper surface of the new base material 20, and its edge on the exterior wall side is sealed S to the surface of the exterior wall, and for example, a long member made of galvalume steel sheet (registered trademark: hot-dip 55% aluminum-zinc alloy plated steel sheet and steel strip) is used. In this embodiment, the new flashing metal sheet 22 has, in its cross-sectional shape, a central portion 36 that is placed on the upper surface of the new base material 20, an exterior wall side portion 38 that extends substantially upward from the edge of the central portion 36 on the exterior wall side, and a lower portion 40 that extends substantially downward from the edge of the central portion 36 opposite the exterior wall side and covers the lower side surface of the new base material 20.

[0038] The edge of the exterior wall side portion 38 of the new flashing metal sheet 22 is located close to the outer surface of the exterior wall material 104 in the exterior wall structure A, and the edge is sealed S to the outer surface of the exterior wall material 104. This prevents rainwater and the like from getting between the exterior wall material 104 and the new flashing metal sheet 22.

[0039] The edge of the lower portion 40 of the new flashing metal sheet 22 is located close to the surface of the new roofing material 18. The lower portion 40 is fixed to the new base material 20 by a second fixing member 42 such as a screw or nail.

[0040] (10 Features of Roof Cover Structure) According to the roof covering structure 10 of this embodiment, between the new roofing material 12 and the new roofing material 18, a first breathable material 14 is arranged along the exterior wall, and a second breathable material 16 is arranged along the water gradient of the existing roof structure C.

[0041] This allows the ventilation layer B in the existing exterior wall structure A to communicate with the outside via the first breathable material 14 and the second breathable material 16, making it possible to provide a roof cover structure 10 that can cover deteriorated roofing materials without blocking the ventilation layer B.

[0042] (Variation 1) As shown in FIG. 7, a water-stopping material layer 50 may be provided on the underside (the surface facing the new roofing material 12) of the first breathable material 14 in the cover structure 10 according to the embodiment described above.

[0043] When the fixing member 34 penetrates the first breathable material 14, the new rain flashing metal plate 22, and the new roofing material 12, this water-stopping material layer 50 is pulled into the fixing member 34, thereby entering the gap 52 between the new roofing material 12 and the fixing member 34 and having the role of waterproofing this gap 52.

[0044] The water-stopping material layer 50 may be made of any material that can fulfill the above-mentioned role, and may be, for example, an asphalt-containing adhesive. The water-stopping material layer 50 may be disposed so as to be sandwiched between the underside of the first breathable material 14 and the new roofing material 12, or may be attached to the underside of the first breathable material 14.

[0045] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0046] 10...Cover structure, 12...New roofing material, 14...First breathable material, 16...Second breathable material, 18...New roofing material, 20...New underlayment material, 22...New rain flashing sheet metal, 24...Through hole, 26...Structural member, 28...Second structural member, 30...Main body portion, 32...Thin plate portion, 34...Fixing member, 36...Central portion, 38...Exterior wall side portion, 40...Lower portion, 42...Second fixing member 50...waterproof material layer, 52...gap 100... breathable waterproof sheet, 102... furring strip, 104... exterior wall material, 106... sheathing board, 108... roofing material, 110... roof material, 112... crosspiece, 114... rainproof metal plate

Claims

1. New roofing materials that are placed to cover the surface of the existing roof structure; a first breathable material disposed along the exterior wall on the upper surface of the existing rainproofing sheet metal via the new roofing material; A second breathable material is placed on the top surface of the existing roof material via the new roofing material along the water gradient of the existing roof structure; A new roofing material disposed from the upper surface of the first breathable material to the upper surface of the second breathable material; a new base material disposed on the upper surface of the first breathable material via the new roofing material; a new flashing metal plate disposed on the upper surface of the new base material, the edge of which on the exterior wall side is sealed to the surface of the exterior wall; Roof covering structure.

2. At least one of the first breathable material and the second breathable material is a member that has breathability from one side to the other side along the surface of the existing roof structure. The cover structure according to claim 1 .

3. At least one of the first breathable material and the second breathable material has breathability ensured by arranging a plurality of non-breathable structural members at intervals from one another. The cover structure according to claim 1 .

4. The roof structure further includes a fixing member for fixing the first breathable material and the new flashing metal plate to the existing roof structure, When the fixing member penetrates the first breathable material, the new rain flashing metal plate, and the new roofing material, a water-stopping material layer is drawn into the fixing member to stop water from flowing between the new roofing material and the fixing member, and the water-stopping material layer is disposed on the underside of the first breathable material. The cover structure according to claim 1 .

5. New roofing materials were placed to cover the surface of the existing roof structure. A first breathable material is placed along the exterior wall on the upper surface of the existing rainproofing sheet metal via the new roofing material, A second breathable material is placed on the top surface of the existing roof material via the new roofing material along the water gradient of the existing roof structure; A new roofing material is placed from the upper surface of the first breathable material to the upper surface of the second breathable material, A new base material is placed on the upper surface of the first breathable material via the new roof material, A new rainproofing sheet metal is disposed on the upper surface of the new base material, The edge of the new flashing metal plate on the outer wall side is sealed against the surface of the outer wall. Roof covering methods.

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