Fitting-type vertical roofing material and roof repair method using same

Abstract

To provide a vertical roofing material capable of easily covering a roof, and a repair method using the roofing material.SOLUTION: The interlocking type vertical roofing material includes a roofing material body having an outline shape defined by a pair of long edge portions extending along the beam direction and a pair of short edge portions sandwiching each of the long edge portions and extending along the girder direction, and an upper seam and a bottom seam connected to each of the long edge portions of the roofing material body, in which the upper seam is fitted into the bottom seam of another roofing material arranged adjacent to the roofing material body, and the bottom seam is fitted into the upper seam of another roofing material arranged adjacent to the roofing material body, thereby connecting them to cover the roof of an architectural structure. The upper seam and the bottom seam have a top plate portion and a pair of vertical wall portions that are bent and extend on both sides of the top plate portion and have the other ends connected to the long edge portions, and the vertical wall portions are repeatedly bent in a convex and concave manner with the widthwise center of the top plate portion as a symmetrical plane, thereby forming fitting portions that can be fitted together at a plurality of points.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fitting-type vertical roofing material that is widely used in ordinary houses, offices, condominiums, welfare facilities, resort facilities, etc., and a method for renovating a vertical flat roof or a tile roof using the roofing material, and is intended to efficiently install a vertical roof regardless of whether it is a new construction or renovation. [Background technology]

[0002] Generally, vertical roofs use long, narrow roofing materials that are long in the span direction (from the eaves 51 to the ridge 52) and short in the girder direction (along the eaves 51) as shown in Figure 8, and are roofed by joining the roofing materials together in order from one gable 53 to the other gable 53. Here, gable 53 refers to the edge on the gable side of the gable roof.

[0003] In recent years, there has been an increasing demand for repairing existing vertical flat roofs or tile roofs. Therefore, roofing materials that are easy to handle and can be used for both new construction and repairs have been developed. For example, Patent Document 1 discloses a fitting-type vertical roofing material that has upper and lower seams with almost identical dome-shaped cross sections on the long edges.

[0004] In addition, Patent Document 2 discloses a roofing material in which the upper seam is formed into a generally inverted trapezoid shape, and the vertical wall (rising surface) is elastically deformed in the vertical direction without difficulty by two bent parts. The lower seam has a shape that fits into one of the vertical walls of the upper seam. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-180719 A [Patent Document 2] Japanese Utility Model Application Publication No. 02-149029 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the conventional roofing materials disclosed in the above-mentioned Patent Documents 1 and 2 have the following problems.

[0007] That is, the fitting portion described in Patent Document 1 is firmly fitted at one constriction, so although it is easy to align in the short dimension, it is necessary to release the fitting to align in the long dimension. The fitting described in Patent Document 2 may come off if there is misalignment in the short dimension even if it is displaced in the long dimension, if only one side is fitted. Also, the conventional technology does not provide a clear standard for aligning the bottom seam to a specified position on the base material.

[0008] The object of the present invention is to provide a fitting type vertical roofing material that enables roofs to be laid with ease and precision regardless of whether the roof is new or existing, and a roof repair method using the same. [Means for solving the problem]

[0009] The present invention is a vertical roofing material comprising a roofing material body having a contour shape defined by a pair of long edge portions extending along the beam direction and a pair of short edge portions sandwiching each of the long edge portions and extending along the girder direction, and an upper seam and a bottom seam connected to each of the long edge portions of the roofing material body, the upper seam being fitted into the bottom seam of another roofing material arranged adjacent to the roofing material body, and the bottom seam being fitted into the upper seam of another roofing material arranged adjacent to the roofing material body, thereby connecting and covering the roof of an architectural structure, wherein the upper seam and the bottom seam have a top plate portion and a pair of vertical wall portions that are bent and extend on both sides of the top plate portion and have the other ends connected to the long edge portions, and the vertical wall portions are formed with fitting portions that can be fitted together at multiple points by repeated convex and concave bending with the center of the width of the top plate portion as a symmetrical plane.

[0010] In the interlocking type vertical roofing material having the above configuration, (A) the upper seam has an inverted trapezoidal shape when viewed in cross section in the short length direction, and optionally, the lower seam has a square or trapezoidal shape when viewed in cross section in the short length direction; (i) The upper and lower seams have a convex portion or a convex stripe or a concave portion or a concave stripe protruding in the same or opposite direction at the center of the width of each top plate portion, and a vertical wall portion different from the vertical wall portion connected to the long side edge portion of the lower seam is connected to a tongue piece fixed to the roof base material; (c) the lowermost constriction of the vertical wall portion of the upper seam is formed so as to be able to be temporarily fitted into the uppermost constriction of the vertical wall portion of the lower seam of the other roofing material, and the uppermost constriction of the vertical wall portion of the lower seam is formed so as to be able to be temporarily fitted into the lowermost constriction of the vertical wall portion of the upper seam of the other roofing material; (D) The width of the top plate portion of the lower seam is narrower than the width of the top plate portion of the upper seam, or the radius of curvature of the end of the top plate portion of the lower seam is equal to or larger than the radius of curvature of the end of the top plate portion of the upper seam; (E) The upper and lower seams are formed so that parts of the top plate portions contact each other when completely fitted together; is preferable as a concrete means for solving the problem.

[0011] The present invention also relates to a roof renovation method for covering an existing flat roof or an existing vertical seam roof using a plurality of any of the above-mentioned interlocking vertical roofing materials, comprising the steps of: installing the bottom seam of one roofing material to cover the connection portion existing on the existing roof; hooking the open end of the opening of the top seam of the second roofing material into the constriction under the top plate portion of the bottom seam of the first roofing material; opening the opening of the top seam using the elastic force of the top seam while engaging the opening constriction of the top seam with the first constriction of the bottom seam; and pushing the top seam into the bottom seam, thereby interlocking the multiple constrictions of the top seam and the bottom seam with each other using the elastic force of the top seam and bringing the top plate portions of the top seam and the bottom seam into contact with each other.

[0012] In the roof renovation method having the above configuration, (F) The top plate portion of the lower seam has a convex portion or a convex stripe or a concave portion or a concave stripe in the center in the width direction, and when viewed from above, the convex portion or the convex stripe or the concave portion or the concave stripe is installed at a predetermined position of the base material of the existing roof, (g) the upper seam and the lower seam have a convex portion or convex stripe or a concave portion or concave stripe protruding in the same direction at the center of the width of each top plate portion, and when the upper seam is pressed into the lower seam, the corresponding convex portions or convex stripes or concave portions or concave stripes are brought into contact with each other to align them, and the width of the top plate portion of the lower seam is made narrower than the width of the top plate portion of the upper seam, or the radius of curvature of the top plate end of the lower seam is made the same as or larger than the radius of curvature of the top plate end of the upper seam, thereby forming a gap between the inner surface of the upper seam and the outer surface of the lower seam; (H) The upper seam has a convex portion or a convex stripe in the center of the width direction of the top plate portion, and the lower seam has a concave portion or a concave stripe in the center of the width direction of the top plate portion, and the lower seam is joined to the seam of the existing roof to form a gap between the inner surface of the top plate of the upper seam and the outer surface of the top plate of the lower seam, (I) joining a tongue piece connected to a vertical wall portion different from the vertical wall portion connected to the long side edge portion of the lower seam to a base material; is preferable as a concrete means for solving the problem. Effect of the Invention

[0013] According to the present invention, the long edge of the long roofing material has a bottom seam and a top seam, and the bottom seam is sandwiched by the top seam to form a multi-stage fitting. The first stage of fitting is a temporary fitting, which makes it easy to align the tip position in the longitudinal direction. Furthermore, the multiple stages of fitting allow for a strong fixation.

[0014] According to the present invention, the top plate of the lower seam has a positioning groove or protrusion in the widthwise center, so that it can be easily fixed to a predetermined position on the base material. The opening width of the lower seam is narrower than the top plate width, so that the tongue can be easily fixed inside the base material. The radius of curvature of the top plate end of the lower seam is larger than the radius of curvature of the top plate end of the upper seam, so that a gap is formed between the lower seam and the upper seam, and water that is sucked up to the end of the upper seam by capillary action or pushed in by wind pressure can be discharged to the water below. The top plate in the center of the upper seam has a positioning groove or protrusion in the widthwise center, so that it can be easily positioned to match the corresponding groove or protrusion of the top plate of the lower seam. [Brief description of the drawings]

[0015] [Figure 1] 1 is an external perspective view showing one embodiment of a fitting-type vertical roofing material according to the present invention. FIG. [Diagram 2] FIG. 2 is a front view of the roofing material according to the embodiment. [Diagram 3] FIG. 2 is a perspective view showing a method for roofing the roof material according to the embodiment. [Figure 4] FIG. 2 is a partially enlarged front view showing the state in which the roof material according to the above embodiment is superimposed on a fitted flat roof. [Diagram 5] FIG. 2 is a partially enlarged front view illustrating the steps of the roof material repair method according to the embodiment. [Figure 6] FIG. 2 is a partially enlarged front view of the roofing material according to the embodiment applied to a vertical seam roof. [Figure 7] FIG. 11 is a partially enlarged front view of a roofing material according to another embodiment applied to a standing flat roof. [Figure 8] FIG. 2 is a perspective view showing the vertical roof after it has been installed. [Figure 9] FIG. 4 is a front view showing another embodiment of a fitting type vertical roofing material according to the present invention. [Figure 10] FIG. 2 is a partially enlarged front view showing the state in which the roof material of the other embodiment is superimposed on a fitting flat roof. [Figure 11]FIG. 2 is a partially enlarged front view illustrating the steps of the roof material renovation method according to the above-mentioned another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will now be described in more detail with reference to the drawings. FIG. 1 is an external perspective view showing one embodiment of a fitting type vertical roofing material according to the present invention, and FIG. 2 is a front view thereof.

[0017] The reference numeral 1 in the figure denotes a roofing material body that can be formed from a galvanized steel sheet, an aluminum-zinc alloy-plated steel sheet, a copper sheet, an aluminum sheet, a stainless steel sheet, or the like. The roofing material body 1 is shown as an example of a flat plate, and has a rectangular contour shape defined by a pair of long edge parts 1a, 1b extending along the beam direction and a pair of short edge parts 1c, 1d that sandwich the long edge parts 1a, 1b and extend along the girder direction. Since the effect of negative pressure due to wind is relatively small in low-height buildings, a flat plate is used as the roofing material body 1. When it is necessary to increase the strength against negative pressure in this type of roofing material, at least one step d can be provided on the edge part.

[0018] In addition, symbol 2 denotes an upper seam that fits into the bottom seam of adjacent roofing materials when joining roofing materials together, and symbol 3 denotes a bottom seam that fits into the upper seam of adjacent roofing materials when joining roofing materials together.

[0019] The upper seam 2 has a top plate portion 2a that is approximately parallel to the roofing material main body 1, and a pair of vertical wall portions 2b, 2b that bend and extend to both sides of the top plate portion 2a. The vertical wall portion 2b has fitting portions that can fit with the bottom seam 3 at multiple points by repeating convex and concave bending with the center of the width of the top plate portion 2a as a symmetrical plane. One side of the vertical wall portion 2b is connected to the long edge portion 1a of the roofing material main body 1. The other end of the vertical wall portion 2b is opened, and in the example of FIG. 2, it is folded back to the inside by crushing bending. The upper seam 2 is surrounded by the top plate portion 2a and the pair of vertical wall portions 2b, 2b, and forms a fitting space M on the inside for fitting with the bottom seam of the adjacent roofing material. A V-shaped concave stripe 2c for positioning is formed in the center of the width of the top plate portion 2a. A convex stripe 2d may be used instead of the concave stripe 2c. The pair of vertical walls 2b, 2b each have two engagement constrictions t in the height direction, with the center of the width of the top plate 2a as a symmetrical plane. These engagement constrictions t engage with and clamp the lower seam 3 to prevent the upper seam 2 from being pulled out of the lower seam 3. An opening h is formed in the lower part of the inverted trapezoid formed by the top plate 2a of the upper seam 2 and the pair of vertical walls 2b.

[0020] The bottom seam 3 has a top plate portion 3a that is approximately parallel to the roofing material main body 1, and a pair of vertical wall portions 3b, 3b that bend and extend to both sides of the top plate portion 3a. The vertical wall portion 3b is repeatedly bent in a convex and concave manner with the center of the width of the top plate portion 3a as a symmetrical plane, and a fitting portion that can fit with the top seam 2 is formed at multiple points. One of the vertical wall portions 3b is connected to the long edge portion 1b of the roofing material main body 1. The bottom seam 3 is surrounded by the top plate portion 3a and the pair of vertical wall portions 3b, 3b, and an internal space N is formed inside the top plate portion 3a for accommodating, for example, a connection portion of an existing roofing material. A V-shaped groove 3c for positioning is formed in the center of the width of the top plate portion 3a. A protrusion 3c' may be used instead of the groove 3c. The pair of vertical wall portions 3b, 3b each have two locking constrictions t in the height direction with the center of the width of the top plate portion 3a as a symmetrical plane. This retaining constriction t is engaged with the upper seam 2 to prevent the upper seam 2 from being pulled out of the lower seam 3. An opening i is formed at the bottom of the inverted trapezoid formed by the top plate portion 3a of the lower seam 3 and the pair of vertical wall portions 3b. As shown in FIG. 3, the internal space N formed in the lower seam 3 can accommodate an existing roof material 6, for example, a connecting portion s of a roof material when renovating a vertical flat roof. The number of steps of the constriction t may be the same for the upper seam 2 and the lower seam 3, and may be three or more steps in the height direction. The cross-sectional shape of the lower seam 3 is not particularly limited, but a square or trapezoidal shape is preferable.

[0021] Also, 4 is a tongue piece formed integrally with the lower end of the inclined side plate 3c of the bottom seam 3. This tongue piece 4 is made of a flat plate with the same horizontal surface as the roof material body 1, and the bottom seam 3 is fixed to the roof base material, for example, rafters, with nails or screws.

[0022] The roofing material shown in Figs. 1 and 2 above can be installed on top of an existing roofing material 6, as shown in Fig. 3, with the upper seam 2 fitted into the lower seam 3' connected to the long edge 1b' of another roofing material body 1' arranged adjacent to the roofing material body 1, and the lower seam 3 fitted into the upper seam 2" connected to the long edge of another roofing material body 1" arranged adjacent to the roofing material body 1, to join them together and roof an architectural structure. Fig. 4 shows a partially enlarged front view of roofing materials joined together using the roofing material of this embodiment, and the joints of an existing standing flat roof are accommodated. Figs. 5(a) to (d) show the steps of the method for renovating an existing standing flat roof.

[0023] First, the bottom seam 3' of another adjacent roofing material having the same shape as this embodiment is installed so as to cover the connection part s of the existing roofing material 6 (FIG. 5(a)). At this time, it is preferable to lay the existing roofing material 6 in the opposite direction in the inter-beam direction. The alignment groove 3c' formed on the top plate part 3a' of the bottom seam 3' is installed so as to be located, for example, at the center of the connection part of the existing roofing material 6, that is, the center line of the rafter. By doing so, the tongue 4' can be fixed to the rafter 7a of the base material 7 without interfering with the nail or screw that fixed the existing roofing material 6. It is preferable that the width of the lower opening i of the bottom seam 3' is narrower than the width of the top plate part 3a' and has a width and internal space N that is at least large enough to accommodate the connection part s of the existing roofing material to be covered. By doing so, the overlapping range of the tongue 4 and the rafter 7a can be sufficiently secured when viewed from above, and the roofing material can be firmly fixed.

[0024] Next, the roofing material according to this embodiment is rotated so that the tip of the upper seam 2 is hooked onto the first step of the waist t formed in the vertical wall 3b' of the lower seam 3' (Fig. 5(b)). It is preferable to improve fitting by making the width of the top plate portion 3a' of the lower seam 3' narrower than the width of the top plate portion 2a of the upper seam 2 and making the radius of curvature of both ends of the width direction of the top plate portion 3a' of the lower seam 3' larger than that of the upper seam 2. It is preferable that the upper seam 2 has an inverted trapezoidal shape in a cross section cut in the short length direction, because this makes it easier to pinch and fit the lower seam 3' by the waist due to springback.

[0025] Next, the roofing material is rotated horizontally, and the upper seam 2 is pushed in from above so that the lower constriction t of the upper seam 2 fits into the upper constriction t of the lower seam 3' (Figure 5 (c)). With long roofing materials, it is difficult to align the longitudinal ends after complete engagement. Therefore, in the above-mentioned temporary engagement state, longitudinal alignment is easy. It is advantageous to have multiple engagement parts on the top and bottom. In this way, the roof can be precisely roofed with simple work. In the above embodiment, the engagement with two constrictions is described as an example, but engagement with three or more constrictions may be possible. In that case, the temporary engagement is preferably such that the lowest constriction t of the upper seam 2 fits into the highest constriction t of the lower seam 3'. It is preferable that the lower seam 3' has an inverted trapezoidal shape in a cross section cut in the short length direction, because it is difficult to come off when the upper seam 2 is firmly pushed in and completely engaged.

[0026] Finally, the upper seam 2 is pushed in completely so that the groove 2c on the top plate 2a of the upper seam 2 comes into contact with the groove 3c' on the top plate 3a' of the lower seam 3' of the adjacent roofing material (Fig. 5(d)). By bringing the grooves 2c and 3c' into contact with each other and aligning them, the inter-beam position of the roofing material can be accurately maintained. At this time, the constrictions t formed on the vertical wall portions 2b and 3b' of the upper seam 2 and the lower seam 3' fit together, and are firmly fixed by the elastic force of the upper seam 2 and the frictional force of the surface contact. In addition, a gap (air pocket) e is formed due to the difference in curvature of the widthwise ends of the top plate portions 2a and 3a'. Water that has entered from the tip of the upper seam 2 due to wind pressure or capillary action is prevented from entering further by this gap e, and is discharged in the water downward direction.

[0027] 6 is a partially enlarged front view of a joint in a vertical seam roof repaired using the roofing material of this embodiment. The method can be applied to repair roofs regardless of the shape of the joint.

[0028] 7 is a partially enlarged front view of a joint of an existing standing flat roof that has been repaired using a roofing material according to another embodiment. In the widthwise center of the top plate parts 2a, 3a' of the upper seam 2 of this roofing material and the lower seam 3' of the adjacent roofing material, convex strips 2d, 3d' are formed instead of concave strips.

[0029] 9 and 10 are a front view showing another embodiment of the interlocking vertical roofing material according to the present invention, and a partially enlarged front view showing the state in which the interlocking vertical roofing material is superimposed on an interlocking vertical flat roof. The symbols in the figures are the same as those described above unless otherwise specified.

[0030] In the roofing material of this embodiment, the top plate portion 2a of the upper seam 2 forms a convex portion 2e that bulges upward at the center. Also, the top plate portion 3a of the lower seam 3 forms a concave portion 3e that is concave downward at the center. Fig. 10 shows a partially enlarged front view of the state in which the roofing material of this embodiment is used to connect roofing materials together and the connection portion of an existing standing flat roof is stored. As shown in Fig. 10, the internal space N formed in the lower seam 3' can store the connection portion s of the existing roofing material 6, for example, when renovating a standing flat roof. Then, the center of the top plate portion 3a' of the lower seam 3' and the connection portion s of the existing roofing material 6 can be fixed with a screw b. In this embodiment, a concave portion 3e' is provided in the center of the top plate portion 3a' of the lower seam 3', so that the screw b can be easily fixed. In addition, because the top plate portion 2a of the upper seam 2 bulges upward, when assembled, a gap e capable of accommodating the head of a screw b can be formed between the top plate portion 3a of the lower seam 3. The method of joining the lower seam 3 and the connection portion s of the existing roof material in this embodiment is not particularly limited, but fastening with a screw is simple and preferable.

[0031] The procedure for repairing an existing standing flat roof when using the roofing material of this embodiment is shown in Figures 11(a) to (c). Figure 11(d) is a partially enlarged front view of a portion not fixed with screws. First, the bottom seam 3' of another adjacent roofing material of the same shape as this embodiment is installed so as to cover the joint s of the existing roofing material 6 (Figure 11(a)). At this time, it is preferable to roof the existing roofing material 6 in the opposite direction to the beam direction. Screws b are driven into the recesses 3e' formed in the top plate portion 3a' of the bottom seam 3' at predetermined intervals in the longitudinal direction to fix it to the joint s of the existing roofing material 6 (Figure 11(a)). Then, the top seam 2 of the roofing material of this embodiment is prepared on the bottom seam 3' of the adjacent roofing material (Figure 11(a)).

[0032] Next, the roofing material according to this embodiment is rotated so that the tip of the upper seam 2 is hooked onto the first step of the waist t formed in the vertical wall 3b' of the lower seam 3', the roofing material is leveled, and the upper seam 2 is pushed in from above so that the lower waist t of the upper seam 2 fits into the upper waist t of the lower seam 3' (Fig. 11(b)). Finally, the upper seam 2 is pushed in completely so that the two steps of waist t fit together (Fig. 11(c)). At this time, the waists t formed in the vertical wall portions 2b, 3b' of the upper seam 2 and the lower seam 3' fit together and are firmly fixed in place by the elastic force of the upper seam 2 and the frictional force of the surface contact. As shown in the cross-sectional view of the portion not fastened with screws in Fig. 11(d), in this embodiment, the bulging direction of the top plate portion 2a of the upper seam 2 and the depression of the top plate portion 3a' of the lower seam 3' are in the opposite direction, so that a gap e (air pocket) can be formed between the top plate portions 2a and 3a'. Water that has entered from the tip of the upper seam 2 due to wind pressure or capillary action is prevented from entering any further by this gap e, and is discharged in the downstream direction.

[0033] The construction of a roof using the vertical roofing material according to the present invention is specifically carried out in the following construction steps.

[0034] First, install a secondary waterproof paper asphalt roofing on the sheathing board, and attach a gutter to the eaves. Then, lay out and mark out the width of the roofing material.

[0035] Then, the first roof material is aligned with the layout, the tongue 4 of the bottom seam 3 is fixed to the sheathing boards, rafters, and purlins with screws, nails, etc., the tip of the lower opening h of the upper seam 2 of the second roof material is hooked onto the edge of the top plate portion 3a of the first bottom seam 3, and the constriction t of the opening h of the upper seam 2 is provisionally fitted into the constriction t directly below the top plate portion 3a of the bottom seam 3. After the second roof material is positioned longitudinally, the top plate portion 2a of the upper seam 2 is stepped on with the foot to completely fit it into the bottom seam 3.

[0036] When the upper seam 2 fits into the lower seam 3, the connection between the first and second roofing materials is complete. From then on, the above work can be repeated along the eaves. Once the roofing materials have been connected, the ridge door is attached to the ridge, and then the ridge board is attached. Finally, the eaves cap is attached to the fitting part where the lower opening of the eaves is located. The state of vertical roof installation is shown in Figure 8. [Industrial Applicability]

[0037] According to the present invention, it is possible to provide a vertical roofing material and a repair method using the same, which allows roofs to be easily installed regardless of whether they are being newly built or repaired. [Explanation of symbols]

[0038] 1, 1', 1" Roofing material body 1a Long edge 1b, 1b' long edge 1c Short edge 1d Short edge 2, 2" Upper seam 2a Top plate 2b Vertical wall section 2c groove 2d protrusion 2e Convex part 3, 3' Lower goby 3a, 3a' Top plate 3b, 3b' Vertical wall section 3c, 3c' groove 3d' protrusion 3e, 3e' recess 4, 4' tongue piece 50 Roof 51 hotels 52 buildings 53 Corner 6 Existing roofing materials 7 Base material 7a Rafter d stepped t Locking constriction h (bottom seam) opening i (Top seam) opening s (Existing roof material) joint e Air pockets b bis

Claims

1. The roof material body has a contour shape defined by a pair of long edge portions extending along the beam direction and a pair of short edge portions sandwiching the long edge portions and extending along the girder direction, and an upper seam and a lower seam connected to each of the long edge portions of the roof material body, The upper seam is fitted to the lower seam of another roofing material arranged adjacent to the roofing material main body, and the lower seam is fitted to the upper seam of another roofing material arranged adjacent to the roofing material main body, and the vertical roofing material is connected to cover the roof of a building structure, The upper and lower seams each have a top plate portion and a pair of vertical wall portions each bent and extending to both sides of the top plate portion and having the other end connected to the long edge portion, The vertical wall portion is formed with fitting portions that can be fitted together at multiple points by repeated convex and concave bending with the center of the width of the top plate portion as a symmetrical plane, in an interlocking type vertical roofing material.

2. The upper seam has an inverted trapezoidal shape when viewed in a cross section cut in the short length direction, Optionally, the bottom seam has a rectangular or trapezoidal cross section when cut in the short length direction, according to claim 1 .

3. The upper seam and the lower seam have a convex portion or a convex stripe or a concave portion or a concave stripe protruding in the same direction or in opposite directions at the center of the width of each top plate portion, 2. The interlocking type vertical roofing material according to claim 1, wherein a vertical wall portion different from the vertical wall portion connected to the long side edge portion of the bottom seam is connected to a tongue piece fixed to a roof base material.

4. The lowermost constriction of the vertical wall portion of the upper seam is formed so as to be temporarily fitted into the uppermost constriction of the vertical wall portion of the lower seam of the other roof material, 2. The interlocking vertical roofing material according to claim 1, wherein the uppermost constriction of the vertical wall portion of the lower seam is formed so that the lowermost constriction of the vertical wall portion of the upper seam of the other roofing material can be temporarily fitted into the uppermost constriction of the vertical wall portion of the upper seam of the other roofing material.

5. 2. The interlocking vertical roofing material according to claim 1, wherein the width of the top plate portion of the lower seam is narrower than the width of the top plate portion of the upper seam, or the radius of curvature of the top plate portion end of the lower seam is the same as or larger than the radius of curvature of the top plate portion end of the upper seam.

6. 2. The interlocking type vertical roofing material according to claim 1, wherein the upper seam and the lower seam are formed so that parts of the top plate portions contact each other in a completely interlocking state.

7. A roof renovation method for covering an existing vertical roof or an existing vertical seam roof using a plurality of interlocking vertical roofing materials according to any one of claims 1 to 6, Install a bottom seam of a single roofing material to cover the existing roof joint, Hook the open end of the opening of the upper seam of the second roofing material onto the narrow part under the top plate of the lower seam of the first roofing material, The opening of the upper seam is opened by the elastic force of the upper seam while the first constriction of the lower seam is engaged with the opening constriction of the upper seam; A roof renovation method in which the upper seam is pushed into the lower seam, and the elastic force of the upper seam causes multiple constrictions of the upper seam and the lower seam to fit together and brings the top plate portions of the upper seam and the lower seam into contact with each other.

8. The top plate portion of the lower seam has a convex portion or a convex stripe or a concave portion or a concave stripe in the center in the width direction, The roof renovating method according to claim 7, wherein the convex portion or the convex stripe, or the concave portion or the concave stripe, is provided at a predetermined position of the base material of the existing roof when viewed from above.

9. The upper seam and the lower seam have a convex portion or a convex stripe or a concave portion or a concave stripe protruding in the same direction at the center of the width of each top plate portion, When the upper seam is pressed into the lower seam, corresponding convex portions or convex ridges or concave portions or concave ridges are brought into contact with each other to align them, A roof renovation method as described in claim 7, in which a gap is formed between the inner surface of the upper seam and the outer surface of the lower seam by making the width of the top plate portion of the lower seam narrower than the width of the top plate portion of the upper seam, or by making the radius of curvature of the top plate end of the lower seam the same as or larger than the radius of curvature of the top plate end of the upper seam.

10. The upper seam has a convex portion or a convex stripe in the center of the width direction of the top plate portion, and the lower seam has a concave portion or a concave stripe in the center of the width direction of the top plate portion, The bottom seam is joined to the seam of the existing roof, The roof renovating method according to claim 7, further comprising forming a gap between the inner surface of the top plate of the upper seam and the outer surface of the top plate of the lower seam.

11. A roof repair method according to claim 7, wherein a tongue piece connected to a vertical wall portion different from a vertical wall portion connected to the long side edge portion of the bottom seam is joined to a base material.

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