Roof repair structure, and construction method of the same

Abstract

To ensure ventilation performance and drainage performance inside a side wall in a roof repair structure.SOLUTION: A roof repair structure comprises: a newly installed roof material 20 installed on an existing roof material 10; a ventilation member 30 installed on an existing wall draining plate 16 in a connection part of at least one of an upper edge and a side edge of the newly installed roof material 20 and a side wall 14; and a newly installed wall draining plate 50 installed so as to cover the ventilation member 30. The ventilation member 30 is arranged so as to communicate with a side wall ventilation layer 17 opened at a lower end of the side wall 14. Furthermore, the roof repair structure comprises a supporting member 40 installed on the existing wall draining plate 16 and supporting the newly installed wall draining plate 50. The ventilation member 30 and the supporting member 40 are arranged along at least one of the upper edge and the side edge of the newly installed roof material 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a roof renovation structure formed by renovating an existing roof, and a method for constructing the same. [Background technology]

[0002] A known method of repairing an existing roof using a decorative slate roof is the "covering method," in which the existing decorative slate roof is left in place and a new roof is laid on top of it (see, for example, Non-Patent Document 1 and Patent Document 1). With the covering method, an adhesive underlayment is laid on top of the existing roofing material, and then the new roofing material is installed. At the joints between the exterior wall (side wall) above the water and on the sides of the sloped roof, a new underlayment is laid on top of the existing wall water-repellent board, and a new wall water-repellent board is installed to cover this underlayment board. [Prior art documents] [Patent documents]

[0003] [Non-Patent Document 1] "Steel Roof Construction Standard SSR2007" Japan Metal Roof Association, Japan Steel Construction Association, January 2008, p308-316

[0004] [Patent Document 1] JP 2017-172156 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the repair method of Non-Patent Document 1, waterproof performance is ensured, but ventilation performance of the side walls is not ensured. It is undesirable that the ventilation performance of the side walls that was ensured in the new roof structure is lost after the repair.

[0006] Therefore, an objective of the present invention is to provide a roof renovation structure and a method for constructing the same that can ensure ventilation and drainage performance inside the side walls. [Means for solving the problem]

[0007] The first invention for solving the above-mentioned problems is a roof renovation structure comprising a new roof material installed on top of an existing roof material, at least one of the upper edge and side edge of the newly installed roof material, a ventilation member installed on top of the existing wall water drainage board at the joint with the side wall, and a new wall water drainage board installed so as to cover the ventilation member, wherein the ventilation member is arranged in communication with a side wall ventilation layer that opens at the lower end of the side wall.

[0008] According to the roof renovation structure of the present invention, the ventilation performance inside the side wall can be ensured through the ventilation member. In this specification, "ventilation performance" means that a certain amount of air inside the side wall can be discharged to the outside, and that air can be sucked in and exhausted (intake and exhaust) between the inside of the side wall and the outside. In addition, the drainage performance of draining water that has infiltrated into the side wall through the ventilation member can be ensured. Furthermore, since the new roof material is installed on the existing roof material, waterproof performance can also be ensured.

[0009] In the roof repair structure of the present invention, it is preferable that the roof repair structure further includes a support member that is installed on the existing wall water drainage board and supports the new wall water drainage board, and the ventilation member and the support member are arranged along at least one of the upper edge and the side edge of the new roof material. With this configuration, the new wall water drainage board can be easily fixed while ensuring ventilation performance.

[0010] In the roof repair structure of the present invention, the ventilation member and the support member have the same rectangular cross-sectional shape, and the new wall water-repelling board has a rising board part that rises along the side wall against which the existing roof material abuts, a top board part that covers the top faces of the ventilation member and the support member, and an end board part that covers the end faces of the ventilation member and the support member on the side of the new roof material, and the end board part preferably has a ventilation hole connected to the ventilation member. With this configuration, the air that has passed through the ventilation member can be efficiently sucked in and exhausted to the outside through the ventilation hole, thereby improving the ventilation performance.

[0011] In the roof repair structure of the present invention, it is preferable that the air vent has a horizontally long slit shape and is spaced apart from the lower end of the end panel portion above. With this configuration, rainwater is less likely to seep into the new drainage board through the air vent.

[0012] In the roof repair structure of the present invention, the ventilation member and the support member have the same rectangular cross-sectional shape, the new wall water-repelling board has a rising board part that rises along the side wall against which the existing roof material abuts, a top board part that covers the top faces of the ventilation member and the support member, and an end board part that covers the end faces of the ventilation member and the support member on the side of the new roof material, and a clearance of a predetermined distance is formed between the end face of the existing wall water-repelling board on the side of the existing roof material and the end board part, and the clearance is preferably a ventilation space connected to the ventilation member. With such a configuration, the air that has passed through the ventilation member can be efficiently discharged from the ventilation space to the outside, thereby improving the ventilation performance.

[0013] In the roof repair structure of the present invention, the ventilation member preferably has a plurality of support parts for supporting the load of the new wall drainage board and a ventilation space formed between the support parts. With this configuration, the new wall drainage board can be easily fixed.

[0014] In the roof repair structure of the present invention, it is preferable that a waterproof double-sided tape is laid on the surface of the existing wall water-repelling board. With such a configuration, the ventilation member and the support member can be easily adhered to the surface of the existing wall water-repelling board, and when the new wall water-repelling board is fixed to the support member and the existing wall water-repelling board with screws, the waterproof double-sided tape enters the screw holes of the existing wall water-repelling board, thereby ensuring water-stopping.

[0015] The second invention for solving the above problem is a roof renovation structure comprising a new roofing material installed on top of an existing roofing material, at least one of the upper edge and side edge of the newly installed roofing material, a ventilation member installed on top of the existing roofing material at its joint with the side wall, and a newly installed wall water drainage board installed so as to cover the ventilation member, wherein the ventilation member is arranged in communication with a side wall ventilation layer that opens at the lower end of the side wall.

[0016] According to the roof renovation structure of the present invention, the ventilation performance and drainage performance inside the side wall can be secured through the ventilation member, as in the roof renovation structure of claim 1. In addition, since the new roof material is installed on the existing roof material, waterproof performance can also be secured.

[0017] The third invention for solving the above-mentioned problems is a method for constructing a roof renovation structure, comprising: a new roof installation process for installing a new roof material on top of an existing roof material; a double-sided tape laying process for laying waterproof double-sided tape on top of at least one of the upper edge and side edge of the newly installed roof material and the existing wall water drainage board at the joint with the side wall; a ventilation member installation process for installing a ventilation member that allows air to pass through and a support member that supports the newly installed wall water drainage board on top of the waterproof double-sided tape; and a new wall water drainage board installation process for installing the new wall water drainage board to cover the ventilation member and the support member, and fixing the new wall water drainage board to the support member and the existing wall water drainage board with screws.

[0018] According to the method for constructing a roof repair structure of the present invention, the ventilation performance and drainage performance inside the side wall can be ensured through the ventilation member. In addition, since the new roof material is installed on the existing roof material, waterproof performance can also be ensured. Furthermore, the ventilation member can be attached to the surface of the existing wall water-repelling board with waterproof double-sided tape, and when the new wall water-repelling board is fixed to the ventilation member and the existing wall water-repelling board with screws, the waterproof double-sided tape enters the screw holes of the existing wall water-repelling board, ensuring water-stopping performance.

[0019] The fourth invention for solving the above problem is a method for constructing a roof renovation structure, comprising: a cutting process for cutting off the tip of the existing wall water flashing at the joint between at least one of the upper edge and side edge of the existing roof material and the side wall; a removal process for removing the undercoat below the existing wall water flashing; a new roof installation process for installing a new roof material on top of the existing roof material excluding the edge; a double-sided tape laying process for laying waterproof double-sided tape on the edge of the existing roof material at the joint between at least one of the upper edge and side edge of the new roof material and the side wall; a ventilation member installation process for installing a ventilation member that allows air to pass through and a support member that supports the new wall water flashing on top of the waterproof double-sided tape; and a new wall water flashing installation process for installing the new wall water flashing to cover the ventilation member and the support member, and fixing the new wall water flashing to the support member with screws.

[0020] According to the method for constructing a roof renovation structure of the present invention, as with the method for constructing a roof renovation structure of claim 9, the ventilation performance and drainage performance inside the side wall can be ensured through the ventilation member. In addition, since the new roof material is installed on the existing roof material, waterproof performance can also be ensured. Furthermore, the ventilation member can be attached to the surface of the existing roof material with a waterproof double-sided tape. Effect of the Invention

[0021] According to the roof renovation structure and the construction method of the present invention, it is possible to ensure the ventilation performance and drainage performance inside the side wall. Furthermore, in addition to the ventilation performance, it is also possible to ensure the drainage performance of water that has infiltrated inside the side wall. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a partially cutaway perspective view showing a roof renovation structure relating to the first embodiment of the present invention. [Diagram 2] This is a cross-sectional view of the roof renovation structure related to the first embodiment of the present invention as viewed from the girder direction. [Diagram 3] FIG. 1 is a cross-sectional view of a roof repair structure according to a first embodiment of the present invention, viewed from the flow direction. [Figure 4]FIG. 2 is a perspective view showing a ventilation member and a support member of the roof renovation structure according to the first embodiment of the present invention. [Diagram 5] This is an oblique view showing a newly installed wall water drainage board of a roof renovation structure relating to the first embodiment of the present invention. [Figure 6] (a) is a cross-sectional view showing the existing roof material, and (b) is a cross-sectional view showing the state after the repair adhesive underlayment has been laid during the new roof installation process of the method for constructing a roof repair structure relating to the first embodiment of the present invention. [Figure 7] 1(a) is a cross-sectional view showing the state in which a new roof material has been laid during the new roof installation process of the method for constructing a roof repair structure relating to the first embodiment of the present invention, and 1(b) is a cross-sectional view showing the double-sided tape laying process. [Figure 8] 1(a) is a cross-sectional view of a section passing through a support member showing the installation of a ventilation member in the construction method of a roof repair structure relating to the first embodiment of the present invention, and (b) is a cross-sectional view of a section passing through a ventilation member showing the installation of a ventilation member. [Figure 9] This is a cross-sectional view showing the state in which a newly installed wall water drainage board is installed during the newly installed wall water drainage board installation process of the method for constructing a roof renovation structure relating to the first embodiment of the present invention. [Figure 10] A cross-sectional view of the roof renovation structure for the second embodiment of the present invention viewed from the girder direction. [Figure 11] A cross-sectional view of a roof repair structure relating to a second embodiment of the present invention as viewed from the flow direction. [Figure 12] 1A is an oblique view showing a first modified example of a newly-installed wall water-resisting board, FIG. 1B is a cross-sectional view, and FIG. 1C is an oblique view showing a second modified example of a newly-installed wall water-resisting board. [Figure 13] A cross-sectional view of a roof renovation structure using a ventilation member related to a modified example, viewed from the girder direction. [Figure 14] (a) is a cross-sectional view showing the cutting process of the manufacturing method for a modified roof repair structure related to the first embodiment of the present invention, and (b) is a cross-sectional view of the modified roof repair structure viewed from the girder direction. [Figure 15] A cross-sectional view of a roof renovation structure using a ventilation member related to the second modified example, viewed from the girder direction. [Figure 16]A cross-sectional view of a roof renovation structure using a ventilation member related to the third modified example, viewed from the girder direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] A roof renovation structure and a method for constructing the same according to a first embodiment of the present invention will be described in detail with reference to the drawings. First, the configuration of the roof renovation structure will be described. The roof renovation structure according to this embodiment is a renovation structure in which a new roof material is installed while leaving the existing roof material in place. As shown in Figures 1 to 3, the roof renovation structure 1 includes a new roof material 20 installed on the existing roof material 10, a ventilation member 30, a support member 40, a new wall water-repelling board 50, and a joint water-repelling board 60.

[0024] The existing roofing material 10 is a board material constructed before the renovation, and is laid in multiple sheets on a sheathing board 11 installed on rafters (not shown) via underlayment material 12. The existing roofing material 10 is fixed to the sheathing board 11 with nails. The underlayment material 12 extends to the surface of the base 14a of the side wall 14 and rises a predetermined height along the base 14a. Specifically, the rise dimension of the underlayment material 12 is about 200 mm, and rises about 50 mm higher than the upper end of the rising part 16a of the existing wall water-repelling board 16 described later. At the upper edge and side edge of the existing roofing material 10 in the water gradient direction, a coping 15 is laid at the joint with the side wall 14, and the existing wall water-repelling board 16 is installed on the coping 15. The rising portion 16a at the upper end of the existing wall water drainage board 16 is disposed inside the base vertical member 14c of the surface panel member 14b of the side wall 14. The base vertical members 14c are disposed on the back side of the surface panel member 14b with a predetermined interval between them. Between adjacent base vertical members 14c is a side wall ventilation layer 17 (see FIG. 1) that spreads in the vertical direction inside the side wall 14. The side wall ventilation layer 17 opens downward at the lower end of the side wall 14.

[0025] The new roofing material 20 is a plate material that is newly installed on the existing roofing material 10 that has not been removed and is left behind. A plurality of new roofing materials 20 are laid on the existing roofing material 10 via a modified adhesive underlayment 21. The modified adhesive underlayment 21 is configured with an adhesive layer and release paper on the back side of the underlayment, and is attached to the existing roofing material 10 by peeling off the release paper during construction. The modified adhesive underlayment 21 is laid from the surface of the existing roofing material 10 to the surface of the existing wall water-repelling board 16. The new roofing material 20 is adhered to the existing roofing material 10 by the modified adhesive underlayment 21, and is fixed to the existing roofing material 10 by using nails. The new roofing material 20 may be laid via an underlayment that does not have an adhesive layer, without using the adhesive modified adhesive underlayment 21. The upper edge (hereinafter sometimes referred to as "upper edge") and side edge of the new roof material 20 in the water gradient direction extend to the vicinity of the vertical plate portion 16c that is continuous with the tip of the horizontal plate portion 16b of the existing wall water flashing board 16. A sealant 22 is laid on the surface of the upper edge and side edge of the new roof material 20. The sealant 22 is an irregular sealing material that covers the upper edge and side edge of the new roof material 20 and the vertical plate portion 16c of the existing wall water flashing board 16, and is provided along the longitudinal direction of the vertical plate portion 16c. The sealant 22 is provided so as to fill the gap between the vertical plate portion 16c of the existing wall water flashing board 16 and the new roof material 20.

[0026] The ventilation member 30 is a member that ventilates the air inside the side wall 14 to the outside. The ventilation member 30 is composed of a plate-shaped member with a three-dimensional mesh structure made of resin, and the hollow portion is continuously ventilated in all directions. The ventilation member 30 is, for example, flexible, and is unfolded from a rolled-up state and laid down. The ventilation member 30 is installed on the existing wall water cut-off board 16 at the interface between the upper edge (see FIG. 2) and the side edge (see FIG. 3) of the new roof material 20 in the water gradient direction and the side wall 14. The ventilation member 30 has a long rectangular parallelepiped shape extending in the longitudinal direction of the existing wall water cut-off board 16 (see FIG. 4), and a plurality of ventilation members 30 are laid down at predetermined intervals along the longitudinal direction of the existing wall water cut-off board 16. The ventilation member 30 is a portion near the tip of the horizontal board portion 16b of the existing wall water drainage board 16, and is laid on the upper surface of the portion that protrudes outward beyond the surface board material 14b of the side wall 14, and is arranged in communication with the side wall ventilation layer 17 that opens at the lower end of the side wall 14.

[0027] The support member 40 is a member that supports the new wall water-repellent board 50, and is made of a block-shaped wooden material. As shown in FIG. 4, the cross-sectional shape of the support member 40 is the same as the cross-sectional shape of the ventilation member 30, and is arranged between the ventilation members 30, 30 arranged at intervals. In other words, the ventilation members 30 and the support members 40 are alternately arranged on the new wall water-repellent board 50 provided along the upper edge and side edge of the new roof material 20. The arrangement of the ventilation members 30 and the support members 40 is not limited to one by one alternately. A plurality of the same members may be arranged side by side, or a plurality of one member may be arranged and a single other member may be arranged between them. In this embodiment, the cross-sectional shape of the support member 40 is the same as the cross-sectional shape of the ventilation member 30, but is not limited to this, and the cross-sectional shape of the support member 40 and the cross-sectional shape of the ventilation member 30 may be different shapes. For example, the cross-sectional shape of the ventilation member 30 may be smaller than the cross-sectional shape of the support member 40. The ventilation member 30 and the support member 40 are temporarily fixed to the existing wall water-repelling board 16 via a waterproof double-sided tape 31 laid on the horizontal board portion 16b of the existing wall water-repelling board 16. It is preferable that the support member 40 provided on the new wall water-repelling board 50 provided along the side edge portion of the new roof material 20 has a side surface 41 that is on the upper side of the water gradient inclined so that it becomes downstream of the water gradient as it moves away from the side wall 14 (see FIG. 4). This prevents water that has flowed into the ventilation member 30 from flowing toward the side wall 14. The side surface 41 of the support member 40 that is on the upper side of the water gradient may not be inclined.

[0028] 1 to 3, the new wall water-repelling board 50 is a water-repelling material that covers the ventilation member 30 and the support member 40 above the existing wall water-repelling board 16, and directs water that has flowed down the surface of the side wall 14 onto the newly installed roof material 20. As also shown in Figure 5, the new wall water-repelling board 50 is formed by bending a metal plate material, and has a rising board portion 51, an upper board portion 52, and an end board portion 53.

[0029] The rising plate portion 51 is a portion that fixes the new-wall drainage board 50 to the side wall 14, and rises along the surface panel material 14b of the side wall 14 and is fixed in contact with the lower end of the surface panel material 14b. A lip portion 54 that protrudes in a direction away from the side wall 14 is formed at the upper end of the rising plate portion 51. Note that the new-wall drainage board 50 may have a shape that does not include the lip portion 54 at the upper end of the rising plate portion 51.

[0030] The upper plate portion 52 is a portion that covers the upper surface of the ventilation member 30 and the support member 40. The upper plate portion 52 is formed continuously with the lower end of the rising plate portion 51, and is bent toward the new roof material 20 side with respect to the rising plate portion 51. The upper plate portion 52 of the new wall water drainage board 50 provided on the upper edge portion of the new roof material 20 is bent at an obtuse angle with respect to the rising plate portion 51, and the tip side is inclined diagonally downward (see FIG. 2). The upper plate portion 52 of the new wall water drainage board 50 provided on the side edge portion of the new roof material 20 is bent at a right angle with respect to the rising plate portion 51 (see FIG. 3). The upper plate portion 52 is fixed by screws from the portion covering the support member 40 toward the support member 40 and the existing wall water drainage board 16. At this time, the tip of the screw penetrates the horizontal board portion 16b of the existing wall water drainage board 16, but because waterproof double-sided tape 31 has been laid on the surface of the horizontal board portion 16b, the gap between the screw and the screw hole formed in the horizontal board portion 16b is blocked by the waterproof double-sided tape 31, ensuring waterproofing.

[0031] The end panel portion 53 is a portion that covers the end surface of the ventilation member 30 and the support member 40 on the side of the newly installed roof material 20. The end panel portion 53 is formed continuously with the tip portion of the upper panel portion 52 and is bent downward at a right angle. The end panel portion 53 abuts or is close to the end surface of the ventilation member 30 and the support member 40. The end panel portion 53 is formed with a ventilation hole 55. The ventilation hole 55 is a hole for ventilating the air in the side wall ventilation layer 17 of the side wall 14 to the outside, and is arranged so as to be connected opposite to the ventilation member 30. The ventilation hole 55 also has the function of draining water that has infiltrated into the side wall 14. The ventilation holes 55 have a horizontally elongated slit shape, and are formed in a plurality of holes at predetermined intervals along the longitudinal direction of the newly installed wall water drainage board 50. The ventilation holes 55 are formed at the lower end of the end panel 53, and are arranged at regular intervals (equal to the height of the ventilation holes 55) from the lower end of the end panel 53 upward. A skirt portion 56 that covers the sealing material 22 is formed at the lower end of the end panel 53. The skirt portion 56 is formed continuously with the lower end of the end panel 53, bent at an obtuse angle with respect to the end panel 53, and the tip side is inclined diagonally downward. The tip of the skirt portion 56 abuts or is close to the surface of the newly installed roof material 20. The skirt portion 56 and the sealing material 22 inside it prevent rainwater, etc. from flowing back to the ventilation member 30 or the support member 40. In addition, the ventilation holes 55 are formed at a regular interval from the lower end of the end panel 53, thereby preventing the intrusion of rainwater, etc. blown in from the downstream side and suppressing a decrease in rigidity.

[0032] The joint water-repelling board 60 is a water-repelling board that covers the upper end of the new-wall water-repelling board 50, and is attached to the surface panel material 14b of the side wall 14 above the new-wall water-repelling board 50. The joint water-repelling board 60 is a member that suppresses water from flowing to the upper end of the new-wall water-repelling board 50. The joint water-repelling board 60 has an abutment plate portion 61, an overhanging plate portion 62, and a hanging plate portion 63. The abutment plate portion 61 is a portion that fixes the joint water-repelling board 60 to the side wall 14, and rises along the surface panel material 14b of the side wall 14 above the new-wall water-repelling board 50 and is fixed in abutment against the surface panel material 14b. The overhanging plate portion 62 is a portion that covers the upper end of the rising plate portion 51 of the new-wall water-repelling board 50 from above. The overhanging plate portion 62 is formed continuously from the lower end of the abutting plate portion 61, and is bent and overhanging in a direction away from the side wall 14. The hanging plate portion 63 is a portion that covers the upper end of the rising plate portion 51 of the new wall drainage board 50 from the side. The hanging plate portion 63 is formed continuously from the tip of the overhanging plate portion 62, and is bent downward at a right angle. The lower end of the hanging plate portion 63 is located at a position lower than the upper end of the rising plate portion 51.

[0033] Next, a method for constructing the roof renovation structure 1 according to this embodiment will be described with reference to Figures 6 to 9. The method for constructing the roof renovation structure 1 includes a new roof installation step, a double-sided tape installation step, a ventilation member installation step, a new wall water drainage board installation step, and a joint water drainage board installation step.

[0034] The new roof installation process is a process of installing a new roofing material 20 on an existing roofing material 10. As shown in (a) of FIG. 6, the existing roofing material 10 is laid on a sheathing board 11 via an underlayment material 12. A coping 15 is laid at the joint between the existing roofing material 10 and the side wall 14, and an existing wall water-repellent board 16 is installed on the coping 15. To install the new roofing material 20, first, as shown in (b) of FIG. 6, a repair adhesive underlayment material 21 is laid on the existing roofing material 10. The tip of the repair adhesive underlayment material 21 rises along the vertical board portion 16c of the existing wall water-repellent board 16 and extends to the upper surface of the horizontal board portion 16b. Then, as shown in (a) of FIG. 7, a new roofing material 20 is laid on the repair adhesive underlayment material 21, and a sealant 22 is applied to the end of the new roofing material 20. The sealant 22 is applied so as to cover the gap between the edge of the new roof material 20 and the vertical plate portion 16 c of the existing wall flashing board 16 .

[0035] As shown in Fig. 7(b), the double-sided tape laying process is a process of laying waterproof double-sided tape 31 on the existing wall water-repelling board 16 at the joint between the upper edge and side edge (the upper edge is shown in Fig. 7) of the new roofing material 20 and the side wall 14. The waterproof double-sided tape 31 is for adhering the ventilation member 30 and the support member 40 to the existing wall water-repelling board 16, and is attached to the upper surface of the horizontal board portion 16b of the existing wall water-repelling board 16. The tip of the waterproof double-sided tape 31 on the new roofing material 20 side is attached to the surface of the repair adhesive underlayment material 21 laid on the horizontal board portion 16b, and extends to the tip of the horizontal board portion 16b.

[0036] As shown in Fig. 8, the ventilation member installation process is a process of installing a ventilation member 30 and a support member 40 on a waterproof double-sided tape 31. In the ventilation member installation process, the ventilation member 30 (see Fig. 8(b)) and the support member 40 (see Fig. 8(a)), which are alternately connected and integrated at a predetermined length, are installed on the waterproof double-sided tape 31 from the tip of the horizontal board portion 16b that is on the outer side of the side wall 14. Since the ventilation member 30 and the support member 40 have the same cross-sectional shape, they are installed at the same position in the cross-sectional view of Fig. 8. At the joint between the upper edge and the side edge of the newly installed roof material 20, the support member 40 is placed at the corner, and the ventilation member 30 is arranged so as to extend in an L shape from the support member 40 (see Fig. 4).

[0037] As shown in FIG. 9, the new wall drainage board installation process is a process of installing the new wall drainage board 50 so as to cover the ventilation member 30 and the support member 40, and fixing the new wall drainage board to the support member 40 and the side wall 14. In the new wall drainage board installation process, the rising plate portion 51 of the new wall drainage board 50 is abutted against and bonded to the surface plate material 14b of the side wall 14, and the upper plate portion 52 is placed on the support member 40 and screwed. A sealant is provided in the recessed corner formed by the side wall 14 and the lip portion 54. The tip of the screw penetrates the support member 40 and the horizontal plate portion 16b of the existing wall drainage board 16. The gap between the screw hole formed in the horizontal plate portion 16b and the screw is sealed with the waterproof double-sided tape 31. The end plate portion 53 of the new wall drainage board 50 is close to and covers the end surface of the ventilation member 30 and the support member 40 on the new roof material 20 side. Since an air vent 55 is formed in the end panel portion 53, the side wall ventilation layer 17 of the side wall 14 is connected to the outside air via the ventilation member 30 and the air vent 55, so that ventilation between the inside of the side wall 14 and the outside can be ensured.

[0038] The joint drainage board installation process is a process of installing a joint drainage board 60 above the newly-constructed wall drainage board 50. In the joint drainage board installation process, as shown in FIG. 2, the abutment plate portion 61 of the joint drainage board 60 is bonded to the surface plate material 14b of the side wall 14 above the newly-constructed wall drainage board 50. A sealant is laid on the bonding surface of the upper end portion of the abutment plate portion 61. This causes the protruding plate portion 62 and the hanging plate portion 63 of the joint drainage board 60 to cover the upper end portion of the newly-constructed wall drainage board 50, thereby preventing water from flowing to the upper end portion of the newly-constructed wall drainage board 50. Once the joint drainage board 60 is installed, the construction of the roof renovation structure 1 is completed.

[0039] According to the roof repair structure 1 and its construction method of the present embodiment, the ventilation member 30 is provided at the lower part of the new wall drainage board 50, so that the ventilation performance between the inside and outside of the side wall 14 can be secured (a certain amount of air in the side wall 14 can be drained, and air can be taken in and out between the inside and outside of the side wall 14). In addition, since the ventilation hole 55 is formed in the end face plate part 53 of the new wall drainage board 50, the ventilation member 30 can be connected to the outside air, so that the air in the side wall 14 can be efficiently discharged to the outside through the ventilation member 30 and the ventilation hole 55, and the outside air can be taken in. Therefore, the ventilation performance can be further improved. Furthermore, since the ventilation member 30 and the support member 40 are alternately arranged, the new wall drainage board 50 can be screwed in a stable state. Also, according to the roof repair structure 1 of the present embodiment, water that has infiltrated into the inside of the side wall 14 through the ventilation member 30 can be drained to the outside through the ventilation hole 55. In other words, according to the roof repair structure 1 of the present embodiment, in addition to the ventilation performance, drainage performance can be secured.

[0040] Also, since the existing roof material 10 is left in place and the new roof material 20 and new wall flashing board 50 are installed on top of it, the waterproof structure is doubled and waterproof performance can be improved. Furthermore, since the waterproof double-sided tape 31 is laid on the surface of the existing wall flashing board 16, the ventilation member 30 and the support member 40 can be easily adhered to the surface of the existing wall flashing board 16, and when the new wall flashing board 50 is fixed to the support member 40 and the existing wall flashing board 16 with screws, the waterproof double-sided tape 31 enters the screw holes of the existing wall flashing board 16, ensuring watertightness.

[0041] Next, the configuration of the roof renovation structure 101 according to the second embodiment will be described with reference to Figures 10 and 11. In the roof renovation structure 1 according to the first embodiment, the end panel portion 53 of the newly-installed wall water-repelling board 50 is formed with an air hole 55, whereas in the roof renovation structure 101 according to the second embodiment, the end panel portion 153 of the newly-installed wall water-repelling board 150 is not formed with an air hole.

[0042] As shown in Figs. 10 and 11, the new wall water cut-off board 150 of the second embodiment has a wide upper plate portion 152, and its tip portion 152a extends a predetermined length toward the new roof material 20 side beyond the end faces of the ventilation member 30 and the support member 40 (the ventilation member 30 is illustrated in Figs. 10 and 11). As a result, a clearance of a predetermined distance is formed between the end face of the existing wall water cut-off board 16 on the existing roof material 10 side and the end plate portion 153, and this clearance becomes a ventilation space 155 connected to the ventilation member 30. The skirt portion 156 is arranged parallel to the new roof material 20 with a predetermined distance from the new roof material 20. The gap between the skirt portion 156 and the new roof material 20 connects the ventilation space 155 to the outside air. The other configurations of the ventilation member 30 and the support member 40 are the same as those of the first embodiment, so the same reference numerals are used and the description is omitted.

[0043] According to the roof renovation structure 101 configured as above, even if the new wall drainage board 50 does not have any ventilation holes, the air inside the side wall 14 can be efficiently discharged to the outside through the ventilation member 30 and the ventilation space 155, and the outside air can be drawn inside. Furthermore, water that has infiltrated inside the side wall 14 can be drained to the outside through the ventilation space 155. In other words, according to the roof renovation structure 101, ventilation performance and drainage performance can be ensured. Furthermore, since the new wall drainage board 150 does not have any ventilation holes, rainwater and the like is less likely to infiltrate inside the new wall drainage board 50, and waterproof performance can be improved.

[0044] Although the embodiment for carrying out the present invention has been described above, the present invention is not limited to the above embodiment, and appropriate design changes are possible within the scope of the present invention. For example, in the first embodiment, the vent hole 55 of the new wall drainage board 50 is a horizontally long slit shape, but the shape of the vent hole is not limited to this. For example, it may be a vertically long slit shape, or may have another shape as shown in FIG. 12. The vent hole 55a of the new wall drainage board 50a shown in FIG. 12(a) and (b) is formed by pushing in a part of the end plate part 53, and has a deformed plate part 57 that is inserted below the upper plate part 52. The deformed plate part 57 has a U-shaped cross section. The upper and lower edges of the deformed plate part 57 are cut from the end plate part 53, and the gaps in the cut parts form air passages. According to the ventilation hole 55a configured in this way, ventilation performance can be ensured, and the deformed plate portion 57 blocks rainwater, etc., blown in, so that rainwater, etc. is less likely to penetrate into the interior of the newly-installed wall water-repelling board 50. On the other hand, the ventilation holes 55b of the newly-installed wall water-repelling board 50b shown in Fig. 12(c) have a circular shape, and multiple ventilation holes 55b are formed at predetermined intervals along the longitudinal direction of the newly-installed wall water-repelling board 50b.

[0045] In the above embodiment, the ventilation member 30 and the support member 40 are configured separately, but the present invention is not limited to this. For example, the ventilation member may be configured to be capable of supporting the load of the new wall water cut-off board 50. As shown in FIG. 13, the ventilation member 35 according to the modified example has a strength capable of supporting the new wall water cut-off board 50 while maintaining the breathability. The ventilation member 35 is made of resin and includes a support portion 36, a ventilation space 37, and a plate-shaped portion 38. The support portion 36 is a portion that supports the load of the new wall water cut-off board 50 and is erected in a columnar shape. The support portion 36 is hung between the upper and lower plate-shaped portions 38, 38, and a plurality of support portions 36 are formed with intervals in the horizontal direction. The ventilation space 37 is a space for allowing air inside the side wall 14 to flow to the outside, and is configured by the gap between the adjacent support portions 36. The lower plate-shaped portion 38 is installed on the waterproof double-sided tape 31 attached to the upper surface of the horizontal plate portion 16b of the existing wall water cut-off board 16. The new-wall drainage board 50 is placed on the upper plate-shaped portion 38. With this configuration, the new-wall drainage board 50 can be easily fixed while ensuring ventilation performance and drainage performance.

[0046] In the above embodiment, the ventilation member 30 and the support member 40 are placed on the existing wall water-repelling board 16, but this is not limited thereto. For example, as shown in FIG. 14(b), the ventilation member and the support member 40a may be installed on the existing roof material 10 (the side edge or upper edge of the existing roof material 10 at the joint with the side wall 14) of the portion where the horizontal board portion 16b and the vertical board portion 16c of the existing wall water-repelling board 16 and the coping board 15 below the horizontal board portion 16b have been removed (FIG. 14 illustrates the "support member 40a"). The tip of the horizontal board portion 16b of the existing wall water-repelling board 16 is removed, and the base end is left. In this case, the height dimension of the ventilation member and the support member 40a is larger by the thickness of the new roof material 20 than in the above embodiment. The new wall water-repelling board 50 is placed lower than in the above embodiment. With such a configuration, the same effect as in the above embodiment can be obtained.

[0047] The method for constructing the roof repair structure according to the modified embodiment will be described below. This method includes a cutting step, a removal step, a new roof installation step, a double-sided tape installation step, a ventilation member installation step, and a new wall water drainage installation step. In this method, the cutting step and the removal step are added to the method according to the first embodiment.

[0048] As shown in (a) of Figure 14, the cutting process is a process of cutting off the tip of the existing wall water flashing board 16 at the interface between at least one of the upper edge and side edge of the existing roof material 10 and the side wall 14. In the cutting process, the tip of the horizontal board portion 16b of the existing wall water flashing board 16, the vertical board portion 16c and the inclined portion beyond it are cut off. The horizontal board portion 16b is cut at a position that does not interfere with the ventilation member and support member 40a to be installed in a later process. The removal process is a process of removing the base (cap 15) on the lower side of the existing wall flashing board 16. In the removal process, the nails (not shown) fixing the cap 15 are pulled out, and the cap 15 is pulled out from the lower side of the base end of the horizontal board portion 16b of the existing wall flashing board 16.

[0049] The following steps are generally the same as the construction method of the first embodiment, so detailed explanations will be omitted. In the new roof installation step, the new roof material 20 is installed on the existing roof material 10 except for the upper edge and side edge. In the double-sided tape laying step, a waterproof double-sided tape 31 is laid on the existing roof material 10 at the upper edge where the upper edge of the new roof material 20 meets the side wall. The waterproof double-sided tape 31 is laid to a position close to the upper edge of the new roof material 20. In the ventilation member installation step, a ventilation member through which air can pass and a support member 40a that supports the new wall water drainage board are installed on the waterproof double-sided tape 31. Note that the support member 40a is illustrated in (b) of FIG. 14. Note that the ventilation member has the same cross section as the support member 40a and is arranged on the extension line of the support member 40a. In the new wall drainage board installation process, the new wall drainage board 50 is installed so as to cover the ventilation member and the support member 40a, and the new wall drainage board 50 is fixed to the support member 40a with screws. The roof renovation structure 1 is constructed by the above processes.

[0050] According to the construction method of the modified example, as in the construction method of the first embodiment, the ventilation performance inside the side wall 14 can be ensured through the ventilation member. In addition, since the new roof material 20 is installed on the existing roof material 10, waterproof performance can also be ensured. Furthermore, the ventilation member can be attached to the surface of the existing roof material 10 with waterproof double-sided tape 31.

[0051] Furthermore, in the above embodiment, the ventilation member 30 and the support member 40 are provided close to the lower end of the surface panel 14b of the side wall 14, but this is not limited thereto. As shown in FIG. 15, the ventilation member 30a and the support member may be arranged at a predetermined distance from the lower end of the surface panel 14b. The ventilation member 30a and the support member (not shown) in FIG. 15 are formed shorter in the water gradient direction than the ventilation member and the support member in the first embodiment, and the ends of the ventilation member 30a and the support member on the water side are separated from the lower end of the surface panel 14b. This forms a gap that becomes the ventilation path 18 between the ventilation member 30a and the support member and the surface panel 14b. The ventilation path 18 extends laterally along the longitudinal direction of the ventilation member 30 and the support member. According to this configuration, the air that flows from the side wall ventilation layer 17 to the upstream side of the support member flows laterally along the ventilation path 18 and is guided to the ventilation member 30. This improves ventilation performance. Furthermore, the gap between the ventilation member 30a and the support member and the lower end of the surface plate material 14b can serve as a clearance to absorb dimensional errors of the surface plate material 14b when the accuracy of the placement of the lower end of the surface plate material 14b is poor, thereby improving workability.

[0052] 16, the upper end of the ventilation member 30b may be pushed into the inside of the side wall 14 from the lower end of the surface panel 14b of the side wall 14. The upper end of the ventilation member 30b extends below the base vertical member 14c and faces the side wall ventilation layer 17. With this configuration, even if the lower end of the surface panel 14b is not precisely aligned, the side wall ventilation layer 17 and the ventilation member 30b can be connected to each other, so that the ventilation performance can be ensured. Also, the upper end of the ventilation member 30b is engaged with the lower end of the surface panel 14b, so that the fixation of the ventilation member 30b is improved. [Explanation of symbols]

[0053] 1 Roof renovation structure 10 Existing roofing materials 14 Side wall 17 Side wall ventilation layer 20 New roofing materials 30 Ventilation material 31 Waterproof double-sided tape 40 Support member 50 New wall drainage board 51 Rising plate 52 Top plate part 53 End plate part 55 Ventilation hole 60 Joint drainage board

Claims

1. A newly installed roof material installed on an existing roof material, A ventilation member installed on an existing wall drip plate in contact with at least one of the upper edge and side edge of the newly installed roof material and a side wall, And a newly installed wall drip plate installed so as to cover the ventilation member, The ventilation member is arranged in communication with a side wall ventilation layer that opens at a lower end of the side wall. A roof renovation structure characterized by this.

2. Further provided with a support member installed on the existing wall drip plate and supporting the newly installed wall drip plate, The ventilation member and the support member are arranged along at least one of the upper edge and side edge of the newly installed roof material. The roof renovation structure according to claim 1, characterized by this.

3. The ventilation member and the support member have the same cross-sectional rectangular shape, The newly installed wall drip plate has a rising plate portion rising along the side wall where the existing roof material abuts, an upper surface plate portion covering the upper surfaces of the ventilation member and the support member, and an end surface plate portion covering the end surfaces of the ventilation member and the support member on the side of the newly installed roof material, Ventilation holes communicating with the ventilation member are formed in the end surface plate portion. The roof renovation structure according to claim 2, characterized by this.

4. The ventilation holes have a horizontally long slit shape and are arranged at intervals upward from the lower end of the end surface plate portion. The roof renovation structure according to claim 3, characterized by this.

5. The ventilation member and the support member have the same cross-sectional rectangular shape, The newly installed wall drip plate has a rising plate portion rising along the side wall where the existing roof material abuts, an upper surface plate portion covering the upper surfaces of the ventilation member and the support member, and an end surface plate portion covering the end surfaces of the ventilation member and the support member on the side of the newly installed roof material, A clearance with a predetermined interval is formed between the end face on the side of the existing roof material of the existing wall drip plate and the end plate portion, and the clearance serves as a ventilation space connected to the ventilation member. The roof repair structure according to claim 2, characterized in that.

6. The ventilation member includes a plurality of support portions that support the load of the newly installed wall drip plate and a ventilation space formed between the support portions. The roof repair structure according to claim 1, characterized in that.

7. A waterproof double-sided tape is laid on the surface of the existing wall drip plate. The roof repair structure according to any one of claims 1 to 6, characterized in that.

8. A newly installed roof material installed on the existing roof material, In the engagement of at least one of the upper edge portion and the side edge portion of the newly installed roof material with the side wall, a ventilation member installed on the existing roof material, And a newly installed wall drip plate installed so as to cover the ventilation member, The ventilation member is arranged in communication with a side wall ventilation layer that opens at the lower end portion of the side wall. The roof repair structure, characterized in that.

9. A newly installed roof installation step of installing a newly installed roof material on the existing roof material, A double-sided tape laying step of laying a waterproof double-sided tape on the existing wall drip plate in the engagement of at least one of the upper edge portion and the side edge portion of the newly installed roof material with the side wall portion, A ventilation member installation step of installing a ventilation member through which air can pass and a support member for supporting the newly installed wall drip plate on the waterproof double-sided tape, A newly installed wall drip plate installation step of installing the newly installed wall drip plate so as to cover the ventilation member and the support member, and fixing the newly installed wall drip plate to the support member and the existing wall drip plate with screws. The construction method of the roof repair structure, characterized in that.

10. An excision step of excising the tip of the existing wall drip plate in the engagement between at least one of the upper edge portion and the side edge portion of the existing roof material and the side wall portion; A removal step of removing the base under the existing wall drip plate; A new roof installation step of installing a new roof material on the existing roof material excluding the edge portion; A double-sided tape laying step of laying a waterproof double-sided tape on the existing roof material at the edge in the engagement between at least one of the upper edge portion and the side edge portion of the new roof material and the side wall portion; A ventilation member installation step of installing a ventilation member through which air can pass and a support member for supporting a new wall drip plate on the waterproof double-sided tape; A new wall drip plate installation step of installing the new wall drip plate so as to cover the ventilation member and the support member and fixing the new wall drip plate to the support member with screws, characterized in that it comprises: A method for constructing a roof renovation structure.

Images