JP7795351B2 - Roof structure - Google Patents

Description

This disclosure relates to a method for constructing a roof structure and a roof structure.

In the past, when allocating multiple roofing materials to the roof surface of a building, the materials have been allocated in order from the eaves side to the ridge side so as to achieve a constant working width (see Patent Documents 1 and 2, etc.).

Patent No. 6894618 Japanese Patent Application Laid-Open No. 2021-167436

With the conventional technology described above, when pre-cut materials are used as part of multiple roofing materials, the cut shape must be set for each building.

This is because, when multiple roofing materials are laid out in order from the eaves side to the ridge side to achieve a consistent working width, if the dimensions of the roof surface's eaves edge differ from side to side, the dimensions and shapes required for the pre-cut materials will also differ. Therefore, when pre-cutting roofing materials, it is necessary to set the cut shape each time to correspond to the dimensions of the roof surface's eaves edge from side to side, which is time-consuming.

The purpose of this disclosure is to construct roof structures for a variety of buildings using common pre-cut materials.

One aspect of the present disclosure relates to a roof structure construction method in which multiple roofing materials are allocated to a roof surface so that they are arranged in a stepped pattern in the eaves-ridge direction of the roof surface, and the multiple roofing materials include multiple standard roofing materials whose width dimensions in the eaves-ridge direction are standardized. The multiple standard roofing materials are allocated in order from the ridge side to the eaves side of the roof surface so that they have a constant working width.

One aspect of the present disclosure relates to a roof structure comprising multiple roofing materials arranged in a stepped pattern in the eaves-ridge direction of the roof surface, and the multiple roofing materials include multiple standard roofing materials with standardized width dimensions in the eaves-ridge direction. The multiple standard roofing materials are arranged from the ridge side to the eaves side of the roof surface to provide a constant working width.

This disclosure has the effect of reducing the effort required to change the pre-cut shape for each target property.

FIG. 1 is a plan view showing a roof structure of the first embodiment. FIG. 2 is a plan view showing a part of the roof structure of the same. FIG. 3 is a plan view showing another part of the roof structure. FIG. 4 is a vertical cross-sectional view showing a part of the eaves side of the roof structure. FIG. 5 is a vertical cross-sectional view showing a part of the ridge side of the roof structure. FIG. 6 is a plan view showing a roof structure of a comparative example. FIG. 7 is a vertical cross-sectional view showing a part of the eaves side of the roof structure. FIG. 8 is a vertical cross-sectional view showing a part of the ridge side of the roof structure. FIG. 9 is a perspective view illustrating a case where leftover roofing material is generated at the construction site. FIG. 10 is a plan view showing the roof structure of the second embodiment. FIG. 11 is a vertical cross-sectional view showing a part of the eaves side of the roof structure of the third embodiment. FIG. 12 is a vertical cross-sectional view showing a part of the eave side of the roof structure of the fourth embodiment.

(1) First Embodiment Figures 1 to 5 show a roof structure 9 of the first embodiment. The roof structure 9 of the first embodiment comprises a plurality of roofing materials 1 arranged in a stepped pattern in the eaves-ridge direction D1 (D2) of the roof surface 8 of a building (see Figures 1 to 3, etc.). The building in the first embodiment is, for example, a residence, but is not limited to this. The building may be any building with a roof, such as an office, store, entertainment venue, warehouse, or similar structure.

The roof of the building in the first embodiment is a hipped roof, with four roof surfaces 8 that slope in different directions (see Figure 1). The type of roof of the building is not limited to this, and other types of roofs are also possible, such as a square roof, a gambrel roof, or a hipped roof.

The four roof surfaces 8 of the building roof in the first embodiment are composed of a pair of trapezoidal roof surfaces 8 inclined in different directions, and a pair of triangular roof surfaces 8 inclined in different directions. The pair of trapezoidal roof surfaces 8 are positioned with their ridge sides facing each other and are continuous with each other. The pair of triangular roof surfaces 8 are positioned with their ridge sides facing each other and are spaced apart.

The four roof surfaces 8 described above share the following common configuration. That is, each roof surface 8 has two inclined edges 81, 82 located on both the left and right sides, and an eaves edge 85 (see Figures 2 and 3). The two inclined edges 81, 82 are inclined so that the distance between them increases from the ridge side toward the eaves side, and the two inclined edges 81, 82 intersect with the eaves edge 85 at an acute angle. The two inclined edges 81, 82 are a pair of corner edges located on opposite sides of each other. The above shape of the roof surface 8 is merely an example, and other shapes are also possible.

The multiple roofing materials 1 include multiple standard roofing materials 2 that make up the majority of the roofing materials, and multiple adjusting roofing materials 3 that are separate from the multiple standard roofing materials 2. In the roof structure 9 of the first embodiment, these standard roofing materials 2 and adjusting roofing materials 3 are allocated to the roof surface 8.

The multiple standard roofing materials 2 are multiple roofing materials whose width dimension in the eaves-ridge direction D1 (D2) is standardized. The multiple standard roofing materials 2 include multiple regular materials 2a that have not been pre-cut, and multiple pre-cut materials 2b that have been pre-cut. "Pre-cut" refers to cutting the standard roofing materials 2 in advance during the production process, such as in a factory, to match the slope, shape, dimensions, etc. of the roof surface 8. In the first embodiment, the regular materials 2a are flat and rectangular in plan view. "Plane view" in this specification refers to the plate-shaped material viewed in the thickness direction.

Normal material 2a has a point-symmetric shape. In other words, when normal material 2a is rotated 180 degrees around an axis that passes through its center and is parallel to its thickness direction, it retains the same shape as before the rotation. In this specification, "same" does not require strict sameness; it is sufficient if the material can be considered to be the same in the field of building materials.

The pre-cut material 2b has a right-angled corner 21 and an inclined side 22 located on the opposite side of the corner 21 (see Figure 2). The right angle in this specification does not require strict uniformity; it is sufficient if it can be considered a right angle in the field of building materials. The inclined side 22 is a side formed by pre-cutting. The inclined side 22 of each pre-cut material 2b is set so that when the pre-cut material 2b is installed on the roof surface 8, it aligns with one of the left and right inclined sides 81, 82 of the roof surface 8. In the first embodiment, of the multiple standard roofing materials 2 arranged side by side in the left-right direction on each tier, at least the standard roofing materials 2 located on both the left and right ends are pre-cut materials 2b.

These multiple standard roofing materials 2 (regular materials 2a and pre-cut materials 2b in each row) are laid out in order from the ridge side to the eaves side of the roof surface 8 to achieve a constant working width (i.e., the eaves-ridge direction dimension of the portion exposed to the outside) W2. The working width W2 is the width dimension in the eaves-ridge direction D1 (D2) of the portion of each standard roofing material 2 that does not overlap with another standard roofing material 2 placed in the row above it. The order in which the multiple standard roofing materials 2 are laid out in the first embodiment is the opposite of that of the prior art. Note that the constant working width in this specification does not require strict uniformity; it is sufficient if it can be considered a constant working width in the field of building materials. Furthermore, the order of laying out in this specification refers to the order in which the placement of each roofing material 1 is determined when determining the overall layout, and does not refer to the order in which they are installed on site.

The multiple standard roofing materials 2 include the standard roofing material 2 that is positioned furthest toward the ridge among the multiple standard roofing materials 2 (hereinafter referred to as the "ridge-end roofing material 2R"), and the standard roofing material 2 that is positioned furthest toward the eaves among the multiple standard roofing materials 2 (hereinafter referred to as the "eaves-end roofing material 2E"). In the first embodiment, the ridge-end roofing material 2R is the roofing material 1 that is furthest toward the ridge among the multiple roofing materials 1.

On the trapezoidal roof surface 8, two ridge roofing materials 2R lined up on the left and right are composed of two trapezoidal pre-cut materials 2b lined up on the left and right. Furthermore, four eaves roofing materials 2E lined up on the left and right are composed of pre-cut materials 2b at both ends and two regular materials 2a positioned side by side between the pre-cut materials 2b at both ends.

On the triangular roof surface 8, one ridge roofing material 2R is composed of one triangular pre-cut material 2b. Furthermore, the four eaves roofing materials 2E lined up on the left and right are composed of pre-cut materials 2b at both ends and two regular materials 2a positioned side by side between the pre-cut materials 2b at both ends.

The multiple adjusting roofing materials 3 are allocated further toward the eaves of the multiple standard roofing materials 2. In other words, in the roof structure 9 of the first embodiment, the multiple adjusting roofing materials 3 lined up on the left and right are allocated further toward the eaves of the multiple eaves edge roofing materials 2E lined up on the left and right.

The width dimension of each adjusting roof material 3 in the eaves-ridge direction D1 (D2) is set shorter than the width dimension of each standard roof material 2 in the eaves-ridge direction D1 (D2) (see Figure 4).

The multiple adjustment roofing materials 3 include regular adjustment materials 3a that have not been pre-cut, and pre-cut adjustment materials 3b that have been pre-cut. Regular adjustment materials 3a are flat and rectangular in plan view. Regular adjustment materials 3a have a point-symmetric shape. In other words, when regular adjustment materials 3a are rotated 180 degrees around an axis that passes through their center and is parallel to the thickness direction, they retain the same shape as before the rotation.

The pre-cut adjustment material 3b has a right-angled corner 31 and an inclined edge 32 located on the opposite side of the corner 31. The inclined edge 32 is a side formed by pre-cutting. The inclined edge 32 of each pre-cut adjustment material 3b is set so that when the pre-cut adjustment material 3b is installed at the eaves end of the roof surface 8, it will align with one of the left and right inclined edges 81, 82 of the roof surface 8. Of the multiple adjustment roof materials 3 arranged side by side in the left-right direction, the adjustment roof materials 3 located at both the left and right ends are pre-cut adjustment materials 3b.

These multiple adjusting roofing materials 3 (regular adjusting materials 3a and pre-cut adjusting materials 3b) are laid out so as to cover the eaves end of the roof surface 8 after multiple standard roofing materials 2 have been laid out in order from the ridge side to the eaves side.

On the trapezoidal roof surface 8, five adjusting roof materials 3 lined up on the left and right are made up of pre-cut adjusting materials 3b on both ends and three regular adjusting materials 3a located in a row between the pre-cut adjusting materials 3b on both ends. On the triangular roof surface 8, three adjusting roof materials 3 lined up on the left and right are made up of pre-cut adjusting materials 3b on both ends and one regular adjusting material 3a located in a row between the pre-cut adjusting material 3b on both ends.

In this way, in the construction method of the roof structure 9 of the first embodiment, among the multiple roofing materials 1, multiple standard roofing materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are allocated in order from the ridge side to the eaves side of the roof surface 8 to achieve a constant working width, and then multiple adjusting roofing materials 3 are allocated further toward the eaves of the eaves-edge roofing material 2E.

This method simply adjusts the dimensions and shape of each adjustment roofing material 3 according to the horizontal dimension of the eaves of the roof surface 8, eliminating the need to set a different cut shape for the standard roofing material 2 for each building. In other words, for each pre-cut material 2b hatched in a grid pattern in Figure 1, the same material can be used regardless of the horizontal dimension of the eaves of the roof surface 8. This has the first advantage of allowing roof structures 9 to be constructed using pre-cut materials 2b with standardized cut shapes, even if the target buildings are different.

Additionally, the roof structure 9 of the first embodiment has a second advantage: the ridge roofing material 2R can be fixed directly to the roof surface 8 without any offcuts (see Figure 5). A coping 41 is placed on the ridge-side end of the ridge roofing material 2R, and fasteners 43 that penetrate the coping 41 and the ridge roofing material 2R are driven into the roof surface 8, securing the ridge roofing material 2R to the roof surface 8. The fasteners 43 penetrate not only the coping 41 and the ridge roofing material 2R, but also the standard roofing material 2 below the ridge roofing material 2R. The ridge roofing material 2R and the standard roofing material 2 below that are also secured to the roof surface 8 by another fastener 44. A ridge siding 45 is placed over the coping 41, and the coping 41 and the ridge siding 45 are secured together with fasteners 47. In the first embodiment, fasteners 43, 44, and 47 are nails.

The roof structure 9 of the first embodiment can be easily configured to prevent gaps that would require the placement of scrap material between the ridge-side end of the ridge-end roofing material 2R and the roof surface 8. As a result, there is no need to adjust the gap using scrap material at the ridge-side end of the roof structure 9, and the effort of packaging and shipping scrap material is unnecessary. This also reduces the amount of waste material generated on-site due to the shipping of scrap material.

However, even with the roof structure 9 described above, there may be cases where it is preferable to place offcuts due to various reasons (for example, if offcuts are not placed between the ridge-side end of the ridge-end roofing material 2R and the roof surface 8, the eaves-side end of the ridge-end roofing material 2R will float higher than the appropriate position).

In such cases, as shown in an example in Figure 9, the remaining material 305 generated when the pre-cut adjustment material 3b is cut along the inclined edges 81, 82 to adjust the dimensions on-site can be used as scrap material. Furthermore, the remaining material 105 generated when the starter 10 to be laid along the eaves edge 85 is cut along the inclined edges 81, 82 to adjust the dimensions on-site can be used as scrap material.

This method basically allows the ridge roofing material 2R to be fixed to the roof surface 8 without the need for any scrap material. However, if scrap material is required, any suitable leftover material 105, 305 generated on-site can be used as the scrap material. This eliminates the need to pack and ship the scrap material to prevent the eaves-side end of the ridge roofing material 2R from floating upward.

(2) Comparative Example Figures 6 to 8 show a comparative example of a roof structure 90. Unlike the roof structure 9 of the first embodiment, the comparative example of the roof structure 90 has a plurality of standard roofing materials 20 arranged in order from the eaves side to the ridge side so as to provide a constant working width, similar to the prior art.

For this reason, in this roof structure 90, the cut shape of each pre-cut material 20b included in the multiple standard roofing materials 20 must be set according to the left-right dimension of the eaves of the roof surface 80. In other words, for each pre-cut material 20b hatched in Figure 6, the cut shape must be set for each target building, and the first benefit of the first embodiment cannot be obtained.

In addition, in the comparative roof structure 90, a large gap is likely to form between the ridge-side end of the standard roofing material 20 (hereinafter referred to as "ridge roofing material 20R") that is positioned furthest from the multiple standard roofing materials 20 and the roof surface 8 (see Figure 8). Therefore, it is necessary to arrange scrap material 40 to fill the large gap. In this roof structure 90, a coping board 410 is placed on the ridge-side end of the ridge roofing material 20R, and fasteners 430 that penetrate the coping board 410, ridge roofing material 20R, and scrap material 40 are driven into the roof surface 80, thereby fixing the ridge roofing material 2R to the roof surface 8.

In a roof structure 90 like the comparative example, gaps need to be adjusted using scrap wood 40 at the ridge end of the roof structure 90, which requires the effort of packaging and shipping the scrap wood 40. Furthermore, scrap wood 40 is likely to be generated at the construction site. Therefore, the second benefit of the first embodiment cannot be achieved.

(3) Second Embodiment Fig. 10 shows a roof structure 9 according to a second embodiment. In the second embodiment, components having the same functions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the roof structure 9 of the second embodiment, in order to limit the types of pre-cut materials 2b used to cover the roof surface 8, the flat ridge length (i.e., the left-right length of the ridge portion) L1 is set to be an integer multiple of the working length L2 of the standard roofing material 2 (i.e., the left-right dimension of the portion exposed to the outside). In the second embodiment, the flat ridge length L1 is 1 times the working length L2 of the standard roofing material 2, i.e., the flat ridge length L1 is the same as the working length L2 of the standard roofing material 2. Furthermore, the inclination of the left and right inclined edges 81, 82 of the roof surface 8 relative to the eaves edge 85 is the same, specifically 45°.

In the roof structure 9 of the second embodiment, the type of pre-cut material 2b arranged along the inclined edge 81 is repeated every several rows, and similarly, the type of pre-cut material 2b arranged along the inclined edge 82 is repeated every several rows. The pre-cut materials 2b located at both ends of each row of the roof structure 9 have shapes that are line-symmetrical to each other.

In addition, in the roof structure 9 of the second embodiment, of the pair of trapezoidal roof surfaces 8 located on either side of the ridge, the arrangement and dimensions of the multiple standard roofing materials 2 and adjusting roofing materials 3 covering one roof surface 8 and the arrangement and dimensions of the multiple standard roofing materials 2 and adjusting roofing materials 3 covering the other roof surface 8 are in a line-symmetric relationship with each other and also in a point-symmetric relationship with each other. Therefore, the arrangement and dimensions of the multiple pre-cut materials 2b covering one roof surface 8 and the arrangement and dimensions of the multiple pre-cut materials 2b covering the other roof surface 8 are in a line-symmetric relationship with each other and also in a point-symmetric relationship with each other.

As a result, in the roof structure 9 of the second embodiment, the number of types of pre-cut materials 2b used to cover the roof surface 8 is significantly reduced.

(4) Third Embodiment Fig. 11 shows a roof structure 9 according to a third embodiment. In the third embodiment, components having the same functions as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the roof structure 9 of the third embodiment, instead of allocating an adjusting roofing material 3 further toward the eaves of the eaves edge roofing material 2E as in the first embodiment, an adjusting accessory 5 is allocated to cover the eaves edge of the roof surface 8. The adjusting accessory 5 includes a metal accessory 51 formed by bending a metal plate, and this metal accessory 51 is arranged in a stepped manner relative to the eaves edge roofing material 2E.

The ridge-side portion of the metal fitting 51 is located between the eaves roofing material 2E and the roof surface 8, and is fixed to the roof surface 8 by a fastener 61. The fastener 61 is a nail that penetrates the metal fitting 51 and the underlayment material 62 laid underneath. The fastener 61 is hidden by the eaves roofing material 2E.

The eaves side portion of the metal fitting 51 is not hidden by the eaves edge roof material 2E and is exposed to the outside. The eaves side end of the metal fitting 51 is composed of a folded portion 512 that is folded back in a hook shape toward the ridge side. The folded portion 512 is hooked onto the eaves edge flashing 7. The eaves edge flashing 7 is a flashing member fixed to cover the eaves edge 91 of the roof structure 9, and also functions as a fire protection covering for the eaves edge 91.

The eaves gutter 7 is fixed to the roof surface 8 by fasteners 63. The fasteners 63 are nails that penetrate the eaves gutter 7 and are hidden by the underlayment 62 and the metal fittings 51 that cover it. The eaves gutter 7 is formed by bending a metal plate and has, as an integral part, a flat portion 71 that covers the eaves edge of the roof surface 8, a protruding piece 72 on which the folded portion 512 of the metal fitting 51 hooks, and a protruding piece 73 for the gutter.

The roof structure 9 of the third embodiment also achieves the first and second benefits.

In other words, in the construction method of the third embodiment, multiple standard roofing materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are arranged in order from the ridge side to the eaves side of the roof surface 8 to achieve a constant working width, and adjustment accessories 5 (metal accessories 51) are placed on the eaves side of the eaves-edge roofing materials 2E, and the entire structure is adjusted using these adjustment accessories 5. As a result, as in the first embodiment, it is not necessary to set the cut shape of the standard roofing materials 2 for each building. This provides the first advantage of being able to construct roof structures 9 for a variety of buildings using pre-cut materials 2b with standardized cut shapes.

Furthermore, in the construction method of the third embodiment, multiple standard roofing materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are allocated in order from the ridge side to the eaves side of the roof surface 8 so as to achieve a constant working width. This provides a second advantage in that, as with the first embodiment, the ridge-end roofing material 2R can be fixed directly to the roof surface 8 without the need for any offcuts.

(5) Fourth Embodiment Fig. 12 shows a roof structure 9 according to a fourth embodiment. In the fourth embodiment, components having the same functions as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the roof structure 9 of the fourth embodiment, as in the third embodiment, an adjustment accessory 5 is placed further toward the eaves of the eaves-end roof material 2E so as to cover the eaves end of the roof surface 8.

The adjustment accessory 5 includes multiple metal accessories 52, 53 formed by bending a metal plate. The multiple metal accessories 52, 53 are a first metal accessory 52 and a second metal accessory 53 arranged in a stepped pattern on the eaves roof material 2E.

The ridge-side portion of the first metal accessory 52 is located between the eaves roofing material 2E and the roof surface 8, and is fixed to the roof surface 8 by a fastener 64. The fastener 64 is a nail that penetrates the first metal accessory 52 and the underlayment material 62 laid underneath. The fastener 64 is hidden by the eaves roofing material 2E.

The eaves-side portion of the first metal fitting 52 is not hidden by the eaves-edge roofing material 2E and is exposed to the outside. The eaves-side end of the first metal fitting 52 is formed by a folded portion 522 that is folded back in a hook shape toward the ridge side. The folded portion 522 is hooked onto a fixing bracket 65. The fixing bracket 65 is formed by a metal plate bent in a crank shape, and the folded portion 522 is hooked onto the eaves-side end that is one step higher via a step portion. The lower portion of the fixing bracket 65 via the step portion is fixed to the roof surface 8 by a fixing device 66. The fixing device 66 is a nail that penetrates the fixing bracket 65 and is hidden by the first metal fitting 52.

The ridge-side portion of the second metal fitting 53 is located between the first metal fitting 52 and the fixing bracket 65 and the roof surface 8, and is fixed to the roof surface 8 by a fixing device 67. The fixing device 67 is a nail that penetrates the second metal fitting 53 and the underlayment 62 laid below it, and is hidden by the first metal fitting 52. The second metal fitting 53 is also fixed to the roof surface 8 by a fixing device 66 that penetrates the fixing bracket 65, the second metal fitting 53, and the underlayment 62. The fixing device 66 is located closer to the eaves than the fixing device 67.

The eaves side portion of the second metal fitting 53 is not hidden by the first metal fitting 52 and is exposed to the outside. The eaves side end of the second metal fitting 53 is made up of a folded portion 532 that is folded back in a hook shape toward the ridge side. The folded portion 532 is hooked onto the eaves edge gutters 7.

The fasteners 63 used to secure the eaves gutter 7 to the roof surface 8 are hidden by the underlayment 62 and the second metal accessory 53 that covers it. The eaves gutter 7 integrally includes a flat portion 71 that covers the eaves edge of the roof surface 8, a protruding piece 73 for the gutter, and a protruding piece 75 onto which the folded portion 532 of the second metal accessory 53 hooks.

In the roof structure 9 of the fourth embodiment, the adjustment bracket 5 further includes an angle fixing bracket 55. The angle fixing bracket 55 is a bracket used to secure the snow guard angle 54 and is arranged between the first metal bracket 52 and the second metal bracket 53, which are configured in a stepped pattern. The angle fixing bracket 55 is an L-shaped bracket having a horizontal piece 551 and a vertical piece 553. The horizontal piece 551 of the angle fixing bracket 55 is inserted from the eaves side between the folded portion 522 of the first metal bracket 52 and the second metal bracket 53 located below it, and is fixed to the roof surface 8 by a fixing device 68. The fixing device 68 is a nail that penetrates the angle fixing bracket 55 and the second metal bracket 53 and underlayment material 62 laid underneath. The fixing device 68 is covered by the first metal bracket 52 and the fixing bracket 65.

The roof structure 9 of the fourth embodiment also achieves the first and second benefits.

In other words, in the construction method of the fourth embodiment, multiple standard roofing materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are arranged in order from the ridge side to the eaves side of the roof surface 8 to achieve a constant working width, and adjustment accessories 5 (first metal accessories 52 and second metal accessories 53) are placed on the eaves side of the eaves-edge roofing materials 2E, and the entire structure is adjusted using these adjustment accessories 5. Therefore, as with the first to third embodiments, it is not necessary to set the cut shape of the standard roofing materials 2 for each building. This provides the first advantage of being able to construct roof structures 9 using standardized pre-cut materials 2b for a variety of buildings.

Furthermore, in the construction method of the fourth embodiment, multiple standard roofing materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are laid out in order from the ridge side to the eaves side of the roof surface 8 so as to achieve a constant working width. This provides a second advantage, as in the first to third embodiments, in that the ridge-end roofing material 2R can be fixed directly to the roof surface 8 without the need for any offcuts.

(6) Modifications In each of the above-described embodiments, the roofing material 1 is flat, but is not limited to this and may have other three-dimensional shapes.

In addition, in each of the above-described embodiments, the roofing material 1 has a point-symmetric shape in a planar view, but this is not limited to this. It may also have a non-line-symmetric shape in a planar view. For example, both longitudinal ends at one end in the short side direction may be formed with inclined sides.

(7) Aspects As is clear from the above description of the embodiments and modifications, the method for constructing a roof structure 9 according to the first aspect of the present disclosure is a method for allocating a plurality of roofing materials 1 to a roof surface 8 so that they are arranged in a stepped pattern in the eaves-ridge direction D1 (D2) of the roof surface 8, thereby constructing a roof structure 9. In this method, the plurality of roofing materials 1 include a plurality of standard roofing materials 2 whose width dimension in the eaves-ridge direction D1 (D2) is standardized, and the plurality of standard roofing materials 2 are allocated in order from the ridge side to the eaves side of the roof surface 8 so as to have a constant working width W2.

According to the first aspect, when pre-cut portions of multiple standard roofing materials 2 are used, the cut shape does not need to be set for each building depending on the left-right dimension of the eaves edge of the roof surface 8. In other words, the same pre-cut standard roofing materials 2 can be used regardless of the left-right dimension of the eaves edge of the roof surface 8. Therefore, even if the target buildings are different, the pre-cut standard roofing materials 2 can be commonly used to construct the roof structure 9, reducing the effort required to change the pre-cut shape for each target property.

In the method for constructing a roof structure 9 according to the second aspect of the present disclosure, the plurality of roofing materials 1 in the first aspect further includes a plurality of adjusting roofing materials 3 having widths shorter than the widths of the respective standard roofing materials 2. In this method, a plurality of adjusting roofing materials 3 are allocated further toward the eaves of the plurality of standard roofing materials 2.

According to the second aspect, the dimensions and shape of each adjustment roofing material 3 can be adjusted according to the horizontal dimensions of the eaves of the roof surface 8, eliminating the need to pre-cut the standard roofing material 2 for each building.

In the roof structure construction method according to the third aspect of the present disclosure, in the first aspect, adjustment accessories 5 are allocated further toward the eaves of the multiple standard roof materials 2.

According to the third aspect, the dimensions and shape of the adjustment accessories 5 can be adjusted according to the horizontal dimensions of the eaves of the roof surface 8, eliminating the need to pre-cut the standard roofing material 2 for each building.

In the roof structure construction method according to the fourth aspect of the present disclosure, in any one of the first to third aspects, the roof material 1 arranged closest to the ridge among the multiple roof materials 1 is fixed to the roof surface 8 without any offcut material interposed therebetween.

According to the fourth aspect, there is no need to adjust gaps using off-cuts at the ridge end of the roof structure 9, eliminating the need to pack and ship the off-cuts and reducing the amount of waste material generated on-site.

The roof structure 9 according to the fifth aspect of the present disclosure is a roof structure 9 comprising multiple roofing materials 1 arranged in a stepped pattern in the eaves-ridge direction D1 (D2) of the roof surface 8. The multiple roofing materials 1 include multiple standard roofing materials 2 whose width dimensions in the eaves-ridge direction D1 (D2) are standardized. The multiple standard roofing materials 2 are allocated from the ridge side to the eaves side of the roof surface 8 so as to provide a constant working width.

According to the fifth aspect, when pre-cut portions of multiple standard roofing materials 2 are used, the cut shape does not need to be set for each building depending on the left-right dimension of the eaves edge of the roof surface 8. In other words, the same pre-cut standard roofing materials 2 can be used regardless of the left-right dimension of the eaves edge of the roof surface 8. Therefore, even if the target buildings are different, it is possible to construct a roof structure 9 using the same pre-cut standard roofing materials 2.

In the roof structure according to the sixth aspect of the present disclosure, the plurality of roofing materials 1 in the fifth aspect further includes a plurality of adjusting roofing materials 3 each having a width dimension shorter than the width dimension of each of the standard roofing materials 2. The plurality of adjusting roofing materials 3 are further allocated to the eaves side of the plurality of standard roofing materials 2.

According to the sixth aspect, the dimensions and shape of the adjusting roofing material 3 can be adjusted according to the horizontal dimensions of the eaves of the roof surface 8, and pre-cutting of the standard roofing material 2 does not need to be set for each building.

In the roof structure according to the seventh aspect of the present disclosure, in the fifth aspect, adjustment accessories 5 are allocated further toward the eaves of the multiple standard roofing materials 2.

According to the seventh aspect, the dimensions and shape of the adjustment accessories 5 can be adjusted according to the horizontal dimensions of the eaves of the roof surface 8, and pre-cut standard roofing materials 2 do not need to be set for each building.

1 Roof material 2 Standard roof material 3 Adjustment roof material 40 Scrap material 5 Adjustment accessory 8 Roof surface 9 Roof structure D1 Eaves ridge direction D2 Eaves ridge direction W2 Working width

Claims (4)

A roof structure comprising a plurality of roof materials arranged in a stepped manner in the eaves ridge direction of the roof surface,
The plurality of roofing materials include a plurality of standard roofing materials having standardized width dimensions in the eaves-ridge direction, and the plurality of standard roofing materials include a plurality of normal materials that are not pre-cut and a plurality of pre-cut materials that are pre-cut;
The plurality of standard roofing materials are arranged from the ridge side to the eaves side of the roof surface so as to have a constant working width, and the types of the plurality of pre-cut materials arranged along the inclined side of the roof surface are repeated every several rows.
Roof structure. The flat ridge length is set to be an integral multiple of the working length of each standard roofing material.
The roof structure of claim 1. The plurality of roofing materials further includes a plurality of adjusting roofing materials having width dimensions shorter than the width dimensions of each standard roofing material,
The plurality of adjustment roofing materials are allocated further to the eaves side of the plurality of standard roofing materials,
The roof structure of claim 1 or 2. Further, adjustment accessories are allocated to the eaves side of the plurality of standard roofing materials,
The roof structure of claim 1 or 2.