Roof structure

Abstract

To reduce the labor of changing a pre-cut shape for each target object.SOLUTION: A roof structure 9 is constructed by allocating a plurality of roof materials 1 on a roof surface 8 so as to be arranged stepwise in an eaves ridge direction D1 of the roof surface 8. The plurality of roof materials 1 include a plurality of standard roof materials 2 whose width dimension in the eaves ridge direction D1 is standardized. In this construction method, the plurality of standard roof 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.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a method of constructing a roof structure and to a roof structure. [Background technology]

[0002] In a method of allocating multiple roofing materials to the roof surface of a building, the conventional method has been to allocate multiple roofing materials 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.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6894618 [Patent Document 2] Patent Publication No. 2021-167436 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional technology, when pre-cut materials are used as part of multiple roofing materials, it is necessary to set the cut shape for each building.

[0005] This is because, when multiple roofing materials are laid out in order from the eaves to the ridge to achieve a constant 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 becomes necessary to set the cut shape each time according to the dimensions of the roof surface's eaves edge in the left and right direction, which is time-consuming.

[0006] The present disclosure aims to construct roof structures for a variety of buildings using common pre-cut materials. [Means for solving the problem]

[0007] A method for constructing a roof structure according to one aspect of the present disclosure is a method for constructing a roof structure by allocating multiple roofing materials to a roof surface so that they are arranged in a stepped pattern in the eaves-ridge direction of the roof surface, where 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.

[0008] A roof structure according to one aspect of the present disclosure is a roof structure comprising a plurality of roofing materials arranged in a stepped manner in the eaves-ridge direction of the roof surface, the plurality of roofing materials including a plurality of standard roofing materials whose width dimension in the eaves-ridge direction is standardized. 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. [Effects of the Invention]

[0009] The present disclosure has the effect of reducing the effort required to change the pre-cut shape for each target property. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view showing a roof structure of the first embodiment. [Figure 2] FIG. 2 is a plan view showing a part of the roof structure of the same. [Figure 3] FIG. 3 is a plan view showing another part of the roof structure of the same. [Figure 4] FIG. 4 is a vertical cross-sectional view showing a part of the eaves side of the roof structure. [Figure 5] FIG. 5 is a vertical cross-sectional view showing a part of the ridge side of the roof structure. [Figure 6] FIG. 6 is a plan view showing a roof structure of a comparative example. [Figure 7] FIG. 7 is a vertical cross-sectional view showing a part of the eaves side of the roof structure. [Figure 8] FIG. 8 is a vertical cross-sectional view showing a part of the ridge side of the roof structure. [Figure 9]FIG. 9 is a perspective view illustrating a case where leftover roofing material is generated at the construction site. [Figure 10] FIG. 10 is a plan view showing the roof structure of the second embodiment. [Figure 11] FIG. 11 is a vertical cross-sectional view showing a part of the eaves side of the roof structure of the third embodiment. [Figure 12] FIG. 12 is a vertical cross-sectional view showing a part of the eave side of the roof structure of the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (1) First embodiment Figures 1 to 5 show a roof structure 9 of a 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 house, but is not limited to this. The building may be any building with a roof, and may be an office, store, entertainment venue, warehouse, or similar structure.

[0012] The roof of the building in the first embodiment is a hip roof, with four roof surfaces 8 that are inclined in different directions (see FIG. 1). The type of roof of the building is not limited to this, and other types of roofs may be used, such as a square roof, a gambrel roof, or a hip roof.

[0013] 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 from each other and a pair of triangular roof surfaces 8 inclined in different directions from each other. 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 from each other.

[0014] The four roof surfaces 8 described above have the following common configuration. That is, each roof surface 8 has two inclined sides 81, 82 located on both the left and right sides, and an eaves edge 85 (see Figures 2 and 3). The two inclined sides 81, 82 are inclined so that the distance between them increases from the ridge side toward the eaves side, and both inclined sides 81, 82 intersect with the eaves edge 85 at an acute angle. The two inclined sides 81, 82 are a pair of corner edges located on opposite sides of each other. The above-mentioned shape of the roof surface 8 is merely an example, and other shapes are also possible.

[0015] The multiple roofing materials 1 include multiple standard roofing materials 2 that make up the main part of the roofing materials 1, 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.

[0016] 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" means that the standard roofing materials 2 are cut in advance in a production process such as a factory to match the slope, shape, dimensions, etc. of the roof surface 8. In the first embodiment, the regular material 2a is flat and rectangular in plan view. "Plane view" in this specification refers to a plate-shaped object viewed in the thickness direction.

[0017] The normal material 2a has a point-symmetric shape. In other words, when the normal material 2a is rotated 180° around an axis that passes through its center and is parallel to the thickness direction, it has the same shape as before the rotation. In this specification, "same" does not require strict sameness, but it is sufficient if they can be considered to be the same in the field of building materials.

[0018] 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, but may 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 will align 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.

[0019] These multiple standard roofing materials 2 (the regular materials 2a and precut materials 2b in each row) are laid out in order from the ridge side to the eaves side of the roof surface 8 so as to have 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 opposite to 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 each roofing material 1 is placed when determining the overall layout, and does not refer to the order in which it is installed on site.

[0020] The multiple standard roofing materials 2 include a standard roofing material 2 (hereinafter referred to as "ridge end roofing material 2R") that is positioned closest to the ridge among the multiple standard roofing materials 2, and a standard roofing material 2 (hereinafter referred to as "eaves end roofing material 2E") that is positioned closest to the eaves among the multiple standard roofing materials 2. In the first embodiment, the ridge end roofing material 2R is the roofing material 1 closest to the ridge among the multiple roofing materials 1.

[0021] On the trapezoidal roof surface 8, two ridge roofing materials 2R arranged side by side are composed of two trapezoidal pre-cut materials 2b arranged side by side. In addition, four eaves roofing materials 2E arranged side by side 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.

[0022] On the triangular roof surface 8, one ridge roofing material 2R is composed of one triangular pre-cut material 2b. In addition, four eaves roofing materials 2E lined up on the left and right are composed of pre-cut materials 2b on both ends and two regular materials 2a positioned side by side between the pre-cut materials 2b on both ends.

[0023] The multiple adjusting roof materials 3 are allocated further toward the eaves side of the multiple standard roof materials 2. In other words, in the roof structure 9 of the first embodiment, the multiple adjusting roof materials 3 lined up on the left and right are allocated further toward the eaves side of the multiple eaves edge roof materials 2E located side by side on the left and right.

[0024] 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 FIG. 4).

[0025] The multiple adjusting roofing materials 3 include normal adjusting materials 3a that have not been precut and precut adjusting materials 3b that have been precut. The normal adjusting materials 3a are flat and rectangular in plan view. The normal adjusting materials 3a have a point-symmetric shape. In other words, when the normal adjusting material 3a is rotated 180° around an axis that passes through its center and is parallel to the thickness direction, it retains the same shape as before the rotation.

[0026] The pre-cut adjustable material 3b has a right-angled corner 31 and an inclined side 32 located on the opposite side of the corner 31. The inclined side 32 is a side formed by pre-cutting. The inclined side 32 of each pre-cut adjustable material 3b is set so that when the pre-cut adjustable material 3b is installed at the eaves end of the roof surface 8, it will fit along one of the left and right inclined sides 81, 82 of the roof surface 8. Of the multiple adjusting roof materials 3 arranged side by side in the left-right direction, the adjusting roof materials 3 located at both the left and right ends are pre-cut adjustable materials 3b.

[0027] These multiple adjusting roof materials 3 (normal adjusting materials 3a and pre-cut adjusting materials 3b) are arranged so as to cover the eaves end of the roof surface 8 after multiple standard roof materials 2 are arranged in sequence from the ridge side to the eaves side.

[0028] On the trapezoidal roof surface 8, the 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 lined up between the pre-cut adjusting materials 3b on both ends. On the triangular roof surface 8, the 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 lined up between the pre-cut adjusting material 3b on both ends.

[0029] In this way, in the construction method of the roof structure 9 of the first embodiment, among the multiple roof materials 1, multiple standard roof materials 2 whose width dimensions in the eaves-ridge direction D1 (D2) are standardized are allocated in sequence from the ridge side to the eaves side of the roof surface 8 so as to achieve a constant working width, and then multiple adjusting roof materials 3 are allocated further toward the eaves side of the eaves edge roof material 2E.

[0030] According to this method, it is only necessary to adjust the dimensions and shape of each adjusting roofing material 3 according to the horizontal dimension of the eaves edge of the roof surface 8, and it is not necessary to set the cut shape of 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, a common material can be used regardless of the horizontal dimension of the eaves edge of the roof surface 8. Therefore, there is a first advantage in that even if the target building is different, the roof structure 9 can be constructed using pre-cut materials 2b with a standardized cut shape.

[0031] Additionally, the roof structure 9 of the first embodiment has a second advantage in that the ridge roofing material 2R can be fixed directly to the roof surface 8 without any offcuts (see FIG. 5). A coping board 41 is placed on the ridge-side end of the ridge roofing material 2R, and a fastener 43 that penetrates the coping board 41 and the ridge roofing material 2R is driven into the roof surface 8, thereby fixing the ridge roofing material 2R to the roof surface 8. The fastener 43 penetrates not only the coping board 41 and the ridge roofing material 2R, but also the standard roofing material 2 in the step below the ridge roofing material 2R. The ridge roofing material 2R and the standard roofing material 2 in the step below that are also fixed to the roof surface 8 by another fastener 44. A ridge siding 45 is placed over the coping board 41, and the coping board 41 and the ridge siding 45 are fixed together with a fastener 47. In the first embodiment, the fasteners 43, 44, and 47 are nails.

[0032] The roof structure 9 of the first embodiment can be easily configured so that no gaps that would require the placement of scrap material are formed between the ridge-side end of the ridge-end roof material 2R and the roof surface 8. Therefore, there is no need to adjust the gaps using scrap material at the ridge-side end of the roof structure 9, and the effort of packaging and shipping the scrap material is unnecessary. In addition, the generation of waste material on site due to the shipping of scrap material is also reduced.

[0033] Even in the above-described roof structure 9, there may be cases where it is preferable to place scrap material due to various reasons (for example, if scrap material is not placed between the ridge-side end of the ridge-end roof material 2R and the roof surface 8, the eaves-side end of the ridge-end roof material 2R will float higher than the appropriate position).

[0034] In such a case, it is possible to use the remaining material 305 that is generated when the portion of the pre-cut adjusting material 3b that is along the inclined sides 81, 82 is cut off to adjust the dimensions on-site as scrap material, as shown in an example in Figure 9. It is also possible to use the remaining material 105 that is generated when the portion of the starter 10 that is laid along the eaves edge 85 is cut off to adjust the dimensions on-site as scrap material.

[0035] With this method, the ridge roofing material 2R can basically be fixed to the roof surface 8 without using any scrap material, but if scrap material is needed, any suitable scrap material 105, 305 left over at the site can be used as the scrap material. Therefore, there is no need to go through the trouble of packaging and shipping the scrap material to prevent the eaves side end of the ridge roofing material 2R from floating upward.

[0036] (2) Comparative Example 6 to 8 show a comparative roof structure 90. Unlike the roof structure 9 of the first embodiment, the comparative roof structure 90 has multiple standard roof materials 20 arranged in order from the eaves side to the ridge side to provide a constant working width, similar to the prior art.

[0037] Therefore, in this roof structure 90, it is required that the cut shape of each pre-cut material 20b included in the plurality of standard roofing materials 20 be set according to the left-right dimension of the eaves edge 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 advantage of the first embodiment cannot be obtained.

[0038] 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 the "ridge roofing material 20R") that is positioned closest to the ridge among 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 a fastener 430 that passes through the coping board 410, ridge roofing material 20R, and scrap material 40 is driven into the roof surface 80, thereby fixing the ridge roofing material 2R to the roof surface 8.

[0039] In the roof structure 90 of the comparative example, gap adjustment using scrap materials 40 is required at the ridge end of the roof structure 90, which requires the effort of packaging and shipping the scrap materials 40. In addition, scrap materials 40 are likely to be generated at the construction site. Therefore, the second advantage of the first embodiment cannot be obtained.

[0040] (3) Second embodiment Fig. 10 shows a roof structure 9 of the second embodiment. In the second embodiment, components having the same functions as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0041] 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, that is, 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, a 45° inclination.

[0042] In the roof structure 9 of the second embodiment, the type of pre-cut materials 2b arranged along the inclined side 81 is repeated every several rows, and similarly, the type of pre-cut materials 2b arranged along the inclined side 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.

[0043] Additionally, in the roof structure 9 of the second embodiment, of a pair of trapezoidal roof surfaces 8 located on either side of the ridge, the arrangement and dimensions of the plurality of standard roofing materials 2 and adjusting roofing materials 3 covering one roof surface 8 and the arrangement and dimensions of the plurality of 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 plurality of pre-cut materials 2b covering one roof surface 8 and the arrangement and dimensions of the plurality of 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.

[0044] 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 can be significantly reduced.

[0045] (4) Third embodiment 11 shows a roof structure 9 of the third embodiment. In the third embodiment, components having the same functions as those in the first and second embodiments are given the same reference numerals and detailed description thereof will be omitted.

[0046] In the roof structure 9 of the third embodiment, instead of allocating an adjusting roofing material 3 as in the first embodiment further toward the eaves of the eaves edge roofing material 2E, 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.

[0047] 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.

[0048] 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 that is fixed to cover the eaves edge 91 of the roof structure 9, and also has the function of fireproofing the eaves edge 91.

[0049] Eaves flashing 7 is fixed to roof surface 8 by fixing devices 63. Fixing devices 63 are nails that penetrate eaves flashing 7 and are hidden by underlayment 62 and metal fittings 51 that cover it. Eaves flashing 7 is formed by bending a metal plate, and integrally comprises a flat portion 71 that covers the eaves end of roof surface 8, a protruding piece portion 72 on which folded portion 512 of metal fitting 51 is hooked, and a protruding piece portion 73 for flashing.

[0050] The roof structure 9 of the third embodiment also provides the first and second advantages.

[0051] 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 allocated in order from the ridge side to the eaves side of the roof surface 8 so as 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 whole is adjusted using these adjustment accessories 5. As with the first embodiment, therefore, it is not necessary to set the cut shape of the standard roofing materials 2 for each building. Therefore, the first advantage is obtained, that is, the roof structure 9 can be constructed for a variety of buildings using pre-cut materials 2b with standardized cut shapes.

[0052] In addition, in the construction method of the third embodiment, multiple standard roof materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are allocated in sequence from the ridge side to the eaves side of the roof surface 8 so as to achieve a constant working width, thereby obtaining a second advantage in that, as in the first embodiment, the ridge-end roof material 2R can be fixed directly to the roof surface 8 without the need for any scrap material in between.

[0053] (5) Fourth embodiment Fig. 12 shows a roof structure 9 of the fourth embodiment. In the fourth embodiment, components having the same functions as those in the first to third embodiments are given the same reference numerals and detailed description thereof will be omitted.

[0054] In the roof structure 9 of the fourth embodiment, similarly to the third embodiment, an adjustment accessory 5 is arranged further toward the eaves of the eaves-end roof material 2E so as to cover the eaves end of the roof surface 8.

[0055] The adjustment accessory 5 includes a plurality of metal accessories 52, 53 formed by bending a metal plate. The plurality of metal accessories 52, 53 are a first metal accessory 52 and a second metal accessory 53 arranged in a stepped manner on the eaves edge roof material 2E.

[0056] 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.

[0057] The eaves side portion of the first metal fitting 52 is not hidden by the eaves edge roof material 2E and is exposed to the outside. The eaves side end of the first metal fitting 52 is composed of 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 composed of 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 part of the fixing bracket 65 that is one step lower via a 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.

[0058] 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.

[0059] The eaves side portion of the second metal accessory 53 is exposed to the outside and is not hidden by the first metal accessory 52. ​​The eaves side end of the second metal accessory 53 is configured with 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.

[0060] Fixing device 63 for fixing eaves edge flashing 7 to roof surface 8 is hidden by underlayment 62 and second metal accessory 53 that covers it. Eaves edge flashing 7 integrally has flat plate-like portion 71 that covers the eaves end of roof surface 8, protruding piece-like portion 73 for flashing, and protruding piece-like portion 75 on which folded portion 532 of second metal accessory 53 is hooked.

[0061] In the roof structure 9 of the fourth embodiment, the adjustment fixture 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 fixture 52 and the second metal fixture 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 fixture 52 and the second metal fixture 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 fixture 53 and underlayment material 62 laid underneath. The fixing device 68 is covered by the first metal fixture 52 and the fixing bracket 65.

[0062] The roof structure 9 of the fourth embodiment also provides the first and second advantages.

[0063] 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 allocated in order from the ridge side to the eaves side of the roof surface 8 so as to have 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 whole is adjusted using these adjustment accessories 5. Therefore, as in the first to third embodiments, it is not necessary to set the cut shape of the standard roofing materials 2 for each building. Therefore, the first advantage is obtained, that is, the roof structure 9 can be constructed using standardized pre-cut materials 2b for a variety of buildings.

[0064] In addition, in the construction method of the fourth embodiment, multiple standard roof materials 2 with standardized width dimensions in the eaves-ridge direction D1 (D2) are allocated in sequence from the ridge side to the eaves side of the roof surface 8 so as to achieve a constant working width, thereby obtaining a second advantage in that, as in the first to third embodiments, the ridge-edge roof material 2R can be fixed directly to the roof surface 8 without the need for any scrap material in between.

[0065] (6) Variations In each of the above-described embodiments, the roofing material 1 is in the form of a flat plate, but is not limited to this and may have other three-dimensional shapes.

[0066] Furthermore, in each of the above-described embodiments, the roofing material 1 has a point-symmetric shape when viewed in a plane, but this is not limited to this and may have a non-line-symmetric shape when viewed in a plane, and for example, both longitudinal ends at one end in the short side direction may be formed by inclined sides.

[0067] (7) Mode 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 multiple 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 multiple roofing materials 1 include multiple standard roofing materials 2 whose width dimension in the eaves-ridge direction D1 (D2) is standardized, and the multiple 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.

[0068] According to the first aspect, when pre-cutting portions of multiple standard roofing materials 2 for use, it is not necessary to set the cut shape for each building depending on the left-right dimension of the eaves edge of the roof surface 8. In other words, a common pre-cut standard roofing material 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 material 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.

[0069] In the method for constructing a roof structure 9 according to the second aspect of the present disclosure, in the first aspect, the plurality of roofing materials 1 further includes a plurality of adjusting roofing materials 3 having width dimensions shorter than the width dimensions of each of the standard roofing materials 2. In this method, the plurality of adjusting roofing materials 3 are allocated further to the eaves side of the plurality of standard roofing materials 2.

[0070] According to the second aspect, the dimensions and shape of each adjusting roofing material 3 can be adjusted according to the horizontal dimensions of the eaves edge of the roof surface 8, and there is no need to pre-cut the standard roofing material 2 for each building.

[0071] In the method for constructing a roof structure according to the third aspect of the present disclosure, in the first aspect, an adjustment accessory 5 is allocated further to the eaves side of the plurality of standard roof materials 2.

[0072] According to the third aspect, the dimensions and shape of the adjustment accessory 5 can be adjusted according to the left-right dimensions of the eaves of the roof surface 8, and there is no need to pre-cut the standard roof material 2 for each building.

[0073] In a roof structure construction method relating to the fourth aspect of the present disclosure, in any one of the first to third aspects, the roof material 1 among the multiple roof materials 1 that is positioned closest to the ridge is a roof material 1 that is fixed to the roof surface 8 without any scrap material interposed therebetween.

[0074] According to the fourth aspect, there is no need to adjust gaps using scrap wood at the ridge end of the roof structure 9, eliminating the need to pack and ship the scrap wood, and reducing the amount of waste wood generated on site.

[0075] A roof structure 9 according to a fifth aspect of the present disclosure is a roof structure 9 comprising a plurality of roofing materials 1 arranged in a stepped pattern in the eaves-ridge direction D1 (D2) of a roof surface 8. 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. The plurality of 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.

[0076] According to the fifth aspect, when pre-cut portions of multiple standard roofing materials 2 are used, the cut shape does not have 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 by using the same pre-cut standard roofing materials 2.

[0077] In the roof structure according to the sixth aspect of the present disclosure, in the fifth aspect, the plurality of roofing materials 1 further includes a plurality of adjusting roofing materials 3 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 allocated further to the eaves side of the plurality of standard roofing materials 2.

[0078] According to the sixth aspect, the dimensions and shape of the adjusting roofing material 3 can be adjusted according to the left-right 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.

[0079] In the roof structure according to the seventh aspect of the present disclosure, in the fifth aspect, an adjustment accessory 5 is allocated further to the eaves side of the plurality of standard roof materials 2.

[0080] According to the seventh aspect, the dimensions and shape of the adjustment accessory 5 can be adjusted according to the left-right dimensions of the eaves of the roof surface 8, and pre-cuts of the standard roof material 2 do not need to be set for each building. [Explanation of symbols]

[0081] 1. Roofing materials 2 Standard roofing materials 3 Adjustment roofing material 40 Scraps 5 Adjustment accessories 8 Roof surface 9 Roof structure D1 Eave direction D2 Eave direction W2 Working width

Claims

1. A roof structure comprising a plurality of roofing 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 plurality of types of pre-cut materials arranged along the inclined side of the roof surface are repeated every several rows. Roof structure.

2. 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.

3. The plurality of roofing materials further includes a plurality of adjusting roofing materials having width dimensions shorter than the width dimensions of each of the standard roofing materials, 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.

4. An adjustment accessory is allocated to the eaves side of the plurality of standard roof materials, The roof structure of claim 1 or 2.

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