JP7765073B2 - Vertical roof connecting structure, roofing material, and vertical roof forming method - Google Patents

Description

The present invention relates to a connecting structure for vertical roofs, roofing materials, and a method for forming vertical roofs.

Recently, a panel-shaped vertical roofing material has been proposed, as disclosed in Patent Document 1. This panel-shaped vertical roofing material can be connected by simply fitting the top and bottom seams at its widthwise ends into the bottom and top seams of another adjacent vertical roofing material.

Japanese Patent Application Laid-Open No. 2021-021240

The vertical roofing material disclosed in Patent Document 1 is configured so that the ridge-side ends of the bottom seam and top seam each have a reduced section that is one size smaller than the remaining section. The horizontal connections are made first, followed by horizontal connections one row at a time, until the installation toward the ridge is completed.

However, in the case of Patent Document 1, when connecting in the lateral (horizontal) direction, the reduced portion of the upper seam is fitted over the reduced portion of the lower seam, and at the next ridge-side step, the remaining portion of the lower seam is fitted over the upper seam, and at the next step, the remaining portion of the upper seam is fitted over the remaining portion of the lower seam.

In other words, the lower seam must be fitted over the (reduced) upper seam, which is slightly larger than the lower seam, and the reduced portion of the upper seam must be significantly smaller than the remaining portion, making the processing more difficult and it difficult to create a size with sufficient margin, making the fitting process also more difficult.

The present invention solves the above-mentioned problems by providing a connecting structure for vertical roofs, roofing materials, and a method for forming vertical roofs that allows roofing materials to be easily processed and allows roofing materials to be connected together with good workability.

The gist of the present invention will be explained with reference to the attached drawings.

A vertical roof connection structure in which roofing materials are connected vertically and horizontally on a roof substrate,
Each of the roofing materials has a rectangular plate-shaped main body 1, a convex upper seam 2 at each of the left and right ends, and a convex lower seam 3 into which the upper seam 2 is fitted.
An enlarged portion 5 wider than the remaining portion 5' is provided at the eaves side end of the upper seam 2, and the enlarged portion 5 has a length of 10% to 20% of the total length of the upper seam 2,
A reduced portion 6 narrower than the remaining portion 6' is provided at the ridge side end of the bottom seam 3, and the reduced portion 6 has a length of 10% to 20% of the total length of the bottom seam 3,
In the vertical direction, the expanded portion 5 of the upper seam 2 of the roof material located on the ridge side is fitted and connected to the upper seam 2 of the roof material located on the eaves side by the length of the expanded portion 5, and the bottom seam 3 of the roof material located on the ridge side is fitted and connected to the reduced portion 6 of the bottom seam 3 located on the eaves side by the length of the reduced portion 6,
In the horizontal direction, the connecting structure of a vertically roofed roof is characterized in that the bottom seam 3 of one roofing material is fitted and overlapped with the top seam 2 of another roofing material.

The present invention also relates to a connecting structure for a vertically roofed structure, characterized in that in the connecting structure for a vertically roofed structure described in claim 1, the four roofing materials arranged vertically and horizontally have the following connecting structure.
Note: Roofing material B is adjacent to the vertical ridge side of roofing material A, roofing material C is adjacent to the horizontal side of roofing material A, and roofing material D is adjacent to the horizontal side of roofing material B and the vertical ridge side of roofing material C, and the reduced portion 6 of the bottom seam 3 of roofing material A, the remaining portion 6' of the bottom seam 3 of roofing material B, the remaining portion 5' of the top seam 3 of roofing material C, and the expanded portion 5 of the top seam 3 of roofing material D are overlappingly connected.

Furthermore, in the roofing material connecting structure described in either claim 1 or 2, the upper seam 2 and the lower seam 3 have inclined surface portions 7 on the left and right side surfaces at their upper parts that widen outward in the width direction as they go downward, and the lower ends of the inclined surface portions 7 are connected to folded portions 8 that fold inward in the width direction.

Furthermore, in the roofing material connecting structure described in claim 3, the upper seam 2 and the lower seam 3 are configured such that when the reduced portion 6 of the lower seam 3 , the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2 and the expanded portion 5 of the upper seam 2 are fitted in this order, the inclined surface portion 7 of the fitted outer member abuts or is close to the inclined surface portion 7 of the fitted inner member, and the folded portion 8 of the fitted outer member is prevented from coming loose by the folded portion 8 of the fitted inner member.

The present invention also relates to a roofing material for vertical roofs, which has a convex upper seam 2 and a convex lower seam 3 into which the upper seam 2 is fitted at both the left and right ends of a rectangular plate-shaped main body 1, characterized in that the upper seam 2 has an expanded portion 5 at its eave side end that is wider than the remaining portion 5', and the expanded portion 5 has a length that is 10% to 20% of the total length of the upper seam 2, and the lower seam 3 has a reduced portion 6 at its ridge side end that is narrower than the remaining portion 6' , and the reduced portion 6 has a length that is 10% to 20% of the total length of the lower seam 3 .

Furthermore, in the roofing material described in claim 5, the roofing material is characterized in that four of the roofing materials arranged vertically and horizontally are connected as follows.
Note (1) Roofing material B is adjacent to the vertical ridge side of roofing material A, and the eaves side end of the lower seam 3 of roofing material B is fitted and connected to the reduced portion 6 of roofing material A, and the expanded portion 5 of the upper seam 2 of roofing material B is fitted and connected to the ridge side end of the upper seam 2 of roofing material A.
(2) The roofing material C is adjacent to the horizontal side of the roofing material A, and the upper seam 2 of this roofing material C is
It is fitted and joined to the eaves side ends of the bottom seam 3 of roof material A and the bottom seam 3 of roof material B.
(3) Roofing material D is adjacent to the horizontal side of roofing material B and the ridge side of roofing material C in the vertical direction, and the upper seam 2 of roofing material D is fitted and connected to the lower seam 3 of roofing material B, and further, the expanded portion 5 of the upper seam 2 of roofing material D is fitted and connected to the ridge side end of the upper seam 2 of roofing material C.

Furthermore, in the roofing material described in either claim 5 or 6, the upper seam 2 and the lower seam 3 have inclined surface portions 7 on the left and right side surfaces of their upper parts that widen outward in the width direction as they go downward, and the lower ends of the inclined surface portions 7 are connected to folded portions 8 that fold inward in the width direction.

Furthermore, in the roofing material described in claim 7, the upper seam 2 and the lower seam 3 are characterized in that when the reduced portion 6 of the lower seam 3 , the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2 and the expanded portion 5 of the upper seam 2 are fitted in this order, the inclined surface portion 7 of the fitted outer member abuts or is close to the inclined surface portion 7 of the fitted inner member, and the folded portion 8 of the fitted outer member is prevented from coming off by the folded portion 8 of the fitted inner member.

The present invention also relates to a method for forming a vertically-thatched roof, characterized in that a roofing material having the structure shown in 1 below, in which a rectangular plate-shaped main body 1 has a convex upper seam 2 at each of its left and right ends and a convex lower seam 3 into which the upper seam 2 is fitted, is connected vertically and horizontally as shown in 2 below, to form a vertically-thatched roof.
Note 1
The roofing material has an expanded portion 5 at the eave side end of the upper seam 2 that is wider than the remaining portion 5', and the expanded portion 5 has a length of 10% to 20% of the total length of the upper seam 2, and a reduced portion 6 at the ridge side end of the lower seam 3 that is narrower than the remaining portion 6' , and the reduced portion 6 has a length of 10% to 20% of the total length of the lower seam 3 .
Note 2
The four roofing materials arranged vertically and horizontally are connected in the following order (1) to (3).
(1) Roofing material B is connected to the vertical ridge side of roofing material A so that the eaves side end of the lower seam 3 of roofing material B is fitted over the reduced portion 6 of roofing material A, and the expanded portion 5 of the upper seam 2 of roofing material B is fitted over the ridge side end of the upper seam 2 of roofing material A.
(2) Roofing material C is connected to the horizontal side of roofing material A so that the upper seam 2 of roofing material C is fitted over the eaves side ends of the lower seam 3 of roofing material A and the lower seam 3 of roofing material B.
(3) Roofing material D is attached to the horizontal side of roofing material B and the ridge side of roofing material C in the vertical direction, with the upper seam 2 of roofing material D fitted over the lower seam 3 of roofing material B, and the expanded portion 5 of the upper seam 2 of roofing material D fitted over the ridge side end of the upper seam 2 of roofing material C.

Furthermore, in the method for forming a vertically thatched roof described in claim 9, the upper seam 2 and the lower seam 3 have inclined surface portions 7 on the left and right sides of their upper parts that widen outward in the width direction as they go downward, and the lower ends of the inclined surface portions 7 are connected to folded portions 8 that fold inward in the width direction.

Furthermore, in the method for forming a vertically roofed roof described in claim 10, the upper seam 2 and the lower seam 3 are configured such that when the reduced portion 6 of the lower seam 3 , the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2 and the expanded portion 5 of the upper seam 2 are fitted in this order, the inclined surface portion 7 of the fitted outer member abuts or is close to the inclined surface portion 7 of the fitted inner member, and the folded portion 8 of the fitted outer member is prevented from coming off by the folded portion 8 of the fitted inner member.

The present invention, configured as described above, provides a connecting structure for vertical roofs, roofing materials, and a method for forming vertical roofs that allows roofing materials to be easily processed and allows roofing materials to be fitted together with good workability.

FIG. 1 is a schematic explanatory perspective view of a roofing material according to an embodiment of the present invention. 1 is an enlarged schematic plan view of the vicinity of the enlarged portion 5 and a cross-sectional view of the enlarged portion 5 and the remaining portion 5'. FIG. 1 is an enlarged schematic plan view of the vicinity of the reduced portion 6 and a cross-sectional view of the reduced portion 6 and the remaining portion 6'. FIG. FIG. 10 is an explanatory diagram of the roof material connecting process. FIG. 10 is an explanatory diagram of the roof material connecting process. FIG. 10 is an explanatory diagram of the roof material connecting process. FIG. 10 is an explanatory diagram of the roof material connecting process. FIG. 10 is an explanatory diagram of the roof material connecting process.

The preferred embodiment of the present invention will be briefly explained below, illustrating its operation with reference to the drawings.

A vertically roofed roof is formed by fitting and connecting the roofing material of the present invention vertically and horizontally onto a roof substrate comprising a sheathing board and a moisture-permeable waterproof sheet, for example, in the following order (see Figure 4).

(1) Roofing material B is connected to the vertical ridge side of roofing material A so that the eave side end of the bottom seam 3 of roofing material B fits over the reduced portion 6 of roofing material A, and the enlarged portion 5 of the eave side end of the top seam 2 of roofing material B fits over the ridge side end of the top seam 2 of roofing material A. When connecting three or more roofing materials vertically, roofing material B' is similarly connected to the ridge side end of roofing material B.

(2) Next, roofing material C is attached to the horizontal side of roofing material A, and the top seam 2 of roofing material C is overlapped and connected to the eaves side ends of the bottom seams 3 of roofing material A and roofing material B.

(3) Next, roofing material D is placed on the horizontal side of roofing material B and on the vertical ridge side of roofing material C, with the top seam 2 of roofing material D fitted over the bottom seam 3 of roofing material B. Furthermore, as in (1) above, the eave side end of roofing material D is overlap-connected to the ridge side end of roofing material C. When connecting three or more roofing materials vertically, roofing material D' is similarly connected to the ridge side end of roofing material D.

Then, using roofing material C in (3) as roofing material A, repeat steps (2) and (3) until the entire roofing material is laid, forming a vertically thatched roof.

The overlapping area of the four roofing materials of the vertical roof constructed as described above is formed by stacking the reduced section 6, the remaining section 6' of the bottom seam 3, the remaining section 5' of the top seam 2, and the expanded section 5 in that order. This prevents the (smaller) bottom seam 3 from fitting over the (larger) top seam 2, allowing for a more generous shape, which in turn simplifies processing and improves workability when fitting and connecting the pieces together.

Specific examples of the present invention will be described below with reference to the drawings.

This example shows a connecting structure for a vertical roof, constructed by connecting vertical roofing panels on a roof substrate (not shown) in the direction of the roof's slope (vertical direction) and also connecting them horizontally, perpendicular to this slope, to cover the entire roof surface.

Specifically, each of the above roofing materials has the same structure and can be made from painted steel sheets, zinc-plated steel sheets, aluminum-zinc alloy-plated steel sheets, stainless steel sheets, etc., approximately 0.3 mm to 0.5 mm thick, bent or otherwise formed as appropriate.

In this embodiment, it is desirable to connect two or three roofing materials vertically. For example, rather than preparing panels of a fixed size as in Patent Document 1, the size of each roofing material is appropriately set to a length of approximately 2m to 7m and a width (working width) of approximately 300mm to 455mm. For example, the length can be set to approximately 2m to 3m, which can be transported by a small or medium-sized truck, and the configuration can be such that only the minimum number of connections are required vertically.

As shown in Figure 1, the roofing material has a rectangular plate-shaped main body 1 with a convex upper seam 2 on each of its left and right ends and a convex lower seam 3 fitted over the upper seam 2. The eaves-side end of the upper seam 2 has an enlarged section 5 that is wider than the remaining section 5', and the ridge-side end of the lower seam 3 has a reduced section 6 that is narrower than the remaining section 6'. In this example, the upper seam 2 is located on the right end and the lower seam 3 on the left end. The symbol 9 in the figure denotes a piece of roofing material that is placed on the outside of the lower seam 3 and is laid on the underside of the rectangular plate-shaped main body 1 of the adjacent roofing material.

The enlarged portion 5, the reduced portion 6, and the remaining portions 5' and 6' each have the same cross-sectional shape throughout their entire length. Tapered connecting portions may be provided between the enlarged portion 5 and the remaining portion 5', and between the reduced portion 6 and the remaining portion 6'. Figure 2 shows an enlarged view of the vicinity of the enlarged portion 5 and cross-sectional views of the enlarged portion 5 and the remaining portion 5'. Figure 3 shows an enlarged view of the vicinity of the reduced portion 6 and cross-sectional views of the reduced portion 6 and the remaining portion 6'.

The upper seam 2 (including the expanded portion 5) and the lower seam 3 (including the reduced portion 6) of the roofing material of this embodiment have inclined surfaces 7 on the left and right upper side surfaces that widen outward in the width direction as they go downward, and a folded portion 8 that folds back inward in the width direction is connected to the lower end of the inclined surfaces 7. In the figure, reference numeral 10 denotes a rising portion that rises from the center of the rectangular plate-shaped main body 1, and reference numeral 11 denotes a connecting portion with the installation piece 9.

Specifically, when the reduced portion 6, the remaining portion of the lower seam 3, the remaining portion of the upper seam 2, and the expanded portion 5 are fitted together in this order, the inclined surface portion 7 of the outer member abuts or comes close to the inclined surface portion 7 of the inner member, and the folded portion 8 of the outer member is prevented from coming loose by the folded portion 8 of the inner member.

The upper seam 2 is formed so that the flat top surface of the enlarged portion 5 is flush with the flat top surface of the remaining portion 5'. In other words, the enlarged portion 5 is slightly enlarged in the width direction from the remaining portion 5'. The reduced portion 6 of the lower seam 3 is slightly reduced in overall shape from the remaining portion 6'. The top surface of the reduced portion 6 is flat, and the top surface of the remaining portion 6' is approximately flat with a narrow groove in the center.

In the vertical direction, the expanded portion 5 of the upper seam 2 of the roofing material located on the ridge side is fitted and connected to the upper seam 2 of the roofing material located on the eaves side by its length, and the reduced portion 6 of the bottom seam 3 of the roofing material located on the eaves side is fitted and connected to the bottom seam 3 of the roofing material located on the ridge side by its length; and in the horizontal direction, the top seam 2 of one roofing material is fitted and connected to the bottom seam 3 of the other roofing material by its length.

Note that while the enlarged portion 5 and the reduced portion 6 are the same length, they may be different lengths. Furthermore, the enlarged portion 5 and the reduced portion 6 are set shorter than the remaining portions 5' and 6'. For example, the enlarged portion 5 and the reduced portion 6 are set to be approximately 10% to 20% of the total length of the upper seam 2 and the lower seam 3.

Figure 4 is an explanatory diagram of a single-ply roof, with the ridge side facing upward and the eaves side facing downward, constructed starting from the bottom right. In this example, the roofing material is laid from right to left with the top seam on the right and the bottom seam on the left, but it can also be laid from left to right with the bottom seam on the right and the top seam on the left. It can also be constructed in the opposite direction of the arrow in Figure 4, starting from the top left position.

In Figure 4, roofing materials are connected in order starting with roofing material A at the bottom right and following the arrows. Both vertical and horizontal connections require not only seam fitting, but also processes such as applying adhesives and waterproofing, but these are well known and will not be explained here.

(1) The ridge-side end of roofing material A is overlapped with the eave-side end of roofing material B adjacent to the ridge side of roofing material A, with the eave-side end of the bottom seam 3 of roofing material B fitted over the reduced portion 6 of roofing material A, and the expanded portion 5 of roofing material B fitted over the ridge-side end of the top seam 2 of roofing material A. In this example, three roofing materials are connected vertically, so roofing material B' on the ridge side of roofing material B is also connected to roofing material B in the same way as roofing materials A and B (Figures 5 and 6).

(2) Next, the top seam 2 of roofing material C, which is adjacent to the bottom seam 3 of roofing material A, is overlap-connected to the bottom seam 3 of roofing material A so that its ridge-side end fits over the eave-side end of the bottom seam 3 of roofing material B (Figure 6 → Figure 7).

(3) Next, roofing material D adjacent to roofing materials A, B, and C is overlap-connected so that the top seam 2 of roofing material D fits over the bottom seam 3 of roofing material B, and further, as in (1) above, the expanded portion 5 of the top seam 2 of roofing material D fits over the ridge-side end of the top seam 2 of roofing material C. In this example, three roofing materials are connected vertically, so roofing material D' on the ridge side of roofing material D is also connected in the same way as roofing materials A, B, C, and D (Figures 7 → 8).

Then, using roofing material C in (3) as roofing material A, repeat steps (2) and (3) until the entire roofing material is laid, forming a vertically thatched roof.

In the vertical roof formed in the manner described above, the area X where the four roofing materials overlap is as shown in the enlarged cross-sectional view of Figure 8.

Therefore, in this embodiment, the structure of the portion X where the four roofing materials arranged in a cross-shaped pattern overlap is as follows, and this structure is repeatedly provided.

(1) The ridge side end of roofing material A is overlapped with the eave side end of roofing material B, which is adjacent to the ridge side of roofing material A. The eave side end of the bottom seam 3 of roofing material B is fitted over the reduced portion 6 of roofing material A, and the expanded portion 5 of roofing material B is fitted over the ridge side end of the top seam 2 of roofing material A.

(2) The bottom seam 3 of roofing material A is overlapped with the top seam 2 of roofing material C, which is adjacent to the bottom seam 3 of roofing material A, with its ridge side end fitted over the lower end of the bottom seam 3 of roofing material B.

(3) With the expanded portion 5 of roofing material D adjacent to roofing materials A, B, and C fitted over the ridge side end of the top seam 2 of roofing material C, the top seam 2 of roofing material D is overlap-connected to the bottom seam 3 of roofing material B, and the eave side end of roofing material D is overlap-connected to the ridge side end of roofing material C.

Since this embodiment is configured as described above, the reduced section 6, the remaining section 6' of the lower seam 3, the remaining section 5' of the upper seam 2, and the expanded section 5 are layered in this order, so the lower seam 3 is not fitted over the upper seam 2. This allows for a generous shape setting, which makes processing easier and improves workability when fitting and connecting the sections together.

This embodiment is therefore easy to process, allowing roofing materials to be fitted together with good workability.

REFERENCE SIGNS LIST 1 Rectangular plate-shaped main body 2 Upper seam 3 Lower seam 5 Enlarged portion 5' Remaining portion 6 Reduced portion 6' Remaining portion 7 Inclined surface portion 8 Folded portion

Claims (11)

A vertical roof connection structure in which roofing materials are connected vertically and horizontally on a roof substrate,
Each of the roofing materials has a rectangular plate-shaped body with a convex upper seam and a convex lower seam that fits over the upper seam at both left and right ends thereof,
An enlarged portion wider than the remaining portion is provided at the eaves side end of the upper seam, and the enlarged portion has a length of 10% to 20% of the total length of the upper seam,
A reduced portion narrower than the remaining portion is provided at the ridge side end of the bottom seam, and the reduced portion has a length of 10% to 20% of the total length of the bottom seam,
In the vertical direction, the expanded portion of the upper seam of the roof material located on the ridge side is fitted and overlapped with the upper seam of the roof material located on the eaves side by the length of the expanded portion, and the bottom seam of the roof material located on the ridge side is fitted and overlapped with the reduced portion of the bottom seam located on the eaves side by the length of the reduced portion,
A vertically roofed connecting structure characterized in that in the horizontal direction, the bottom seam of one of the roofing materials is fitted over and connected to the top seam of another of the roofing materials. 2. The connecting structure of a vertically thatched roof according to claim 1, wherein the four roofing materials arranged vertically and horizontally have the following connecting structure:
Note: Roofing material B is adjacent to the vertical ridge side of roofing material A, roofing material C is adjacent to the horizontal side of roofing material A, and roofing material D is adjacent to the horizontal side of roofing material B and the vertical ridge side of roofing material C, and the reduced portion of the bottom seam of roofing material A, the remaining portion of the bottom seam of roofing material B, the remaining portion of the top seam of roofing material C, and the expanded portion of the top seam of roofing material D are overlappingly connected. The roofing material connection structure described in claim 1 or 2, wherein the upper and lower seams have inclined left and right side surfaces at their upper portions that widen outward in the width direction as they go downward, and the lower ends of the inclined surfaces are connected to folded portions that fold inward in the width direction. In the roofing material connecting structure described in claim 3, the upper seam and the lower seam are configured such that when the reduced portion of the lower seam , the remaining portion of the lower seam, the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted together in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming loose by the folded portion of the fitted inner member. A roofing material for vertical roofs having a rectangular plate-shaped body with a convex upper seam and a convex lower seam into which the upper seam is fitted at both left and right ends, characterized in that the upper seam has an enlarged section at the eaves side end that is wider than the remaining section, the enlarged section having a length that is 10% to 20% of the total length of the upper seam, and the lower seam has a reduced section at the ridge side end that is narrower than the remaining section , the reduced section having a length that is 10% to 20% of the total length of the lower seam . 6. The roofing material according to claim 5, wherein the roofing material is formed by connecting four of the roofing materials arranged lengthwise and widthwise as follows:
Note (1) Roofing material B is adjacent to the vertical ridge side of roofing material A, and the eaves side end of the lower seam of roofing material B is fitted and connected to the reduced part of roofing material A, and the expanded part of the upper seam of roofing material B is fitted and connected to the ridge side end of the upper seam of roofing material A.
(2) Roofing material C is adjacent to the horizontal side of roofing material A, and the upper seam of roofing material C is fitted and connected to the eaves side ends of the lower seams of roofing material A and roofing material B.
(3) Roofing material D is adjacent to the horizontal side of roofing material B and the ridge side of roofing material C in the vertical direction, and the upper seam of roofing material D is fitted and connected to the lower seam of roofing material B, and further, the enlarged portion of the upper seam of roofing material D is fitted and connected to the ridge side end of the upper seam of roofing material C. The roofing material described in either claim 5 or 6, wherein the upper and lower seams have inclined left and right side surfaces at their upper portions that widen outward in the width direction as they go downward, and the lower ends of the inclined surfaces are connected to fold-back portions that fold inward in the width direction. In the roofing material described in claim 7, the upper seam and the lower seam are shaped so that when the reduced portion of the lower seam , the remaining portion of the lower seam, the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming loose by the folded portion of the fitted inner member. A method for forming a vertically thatched roof, characterized in that a roofing material having the structure described in 1 below, in which a convex upper seam and a convex lower seam into which the upper seam is fitted are provided at both the left and right ends of a rectangular plate-shaped body, are connected lengthwise and widthwise as described in 2 below, to form a vertically thatched roof.
Note 1
The roofing material has an expanded portion at the eave side end of the upper seam that is wider than the remaining portion, and the expanded portion has a length that is 10% to 20% of the total length of the upper seam, and a reduced portion at the ridge side end of the lower seam that is narrower than the remaining portion , and the reduced portion has a length that is 10% to 20% of the total length of the lower seam .
Note 2
The four roofing materials arranged vertically and horizontally are connected in the following order (1) to (3).
(1) Roofing material B is connected to the vertical ridge side of roofing material A so that the eaves side end of the lower seam of roofing material B is fitted over the reduced part of roofing material A, and the expanded part of the upper seam of roofing material B is fitted over the ridge side end of the upper seam of roofing material A.
(2) Roofing material C is connected to the horizontal side of roofing material A in such a way that the upper seam of roofing material C is fitted over the lower seam of roofing material A and the eaves side end of the lower seam of roofing material B.
(3) Roofing material D is attached to the horizontal side of roofing material B and the ridge side of roofing material C in the vertical direction, with the upper seam of roofing material D fitted over the lower seam of roofing material B, and the expanded portion of the upper seam of roofing material D fitted over the ridge side end of the upper seam of roofing material C. A method for constructing a vertically roofed roof according to claim 9, wherein the upper and lower seams have sloping left and right side sections at their upper parts that widen outward in the width direction as they go downward, and the lower ends of the sloping sections are connected to fold-back sections that fold inward in the width direction. 11. A method for forming a vertically roofed roof according to claim 10, characterized in that when the reduced portion of the lower seam, the remaining portion of the lower seam , the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming off by the folded portion of the fitted inner member.