JP7295379B2 - Roof construction method - Google Patents

Description

The present invention relates to a roof construction method for arranging a plurality of metal roof materials on a roof surface.

Patent Literature 1 below discloses a flat metal roofing material. The metal roofing material is placed on the roof surface so that the depth direction extends in the eaves ridge direction of the roof surface, and another metal roofing material is placed on top of one end side (ridge side) in the depth direction. are adapted to Further, in Patent Document 1, a display portion is provided on the surface of the metal roofing material, and the ridge-side metal roofing material is placed on top of the eaves-side metal roofing material based on the display portion. It has also been proposed to make the working width of the metal roofing material constant. The working width is the width of the eaves-side metal roofing material in the depth direction that is exposed on the eaves side of the ridge-side metal roofing material without being covered by the ridge-side metal roofing material.

JP 2018-003430 A

In the conventional configuration as described above, the width of the metal roof material on the eaves side is fixed, so the following problems occur. That is, the roof surfaces of buildings are designed to have various slopes. If the width of the metal roof material on the eaves side is fixed as in the conventional configuration, it is necessary to change the number of stages of the metal roof material to be arranged on the roof surface according to the inclination of the roof surface. If the number of layers of metal roofing materials changes, the number of metal roofing materials required for construction of the roof also changes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a roof construction method capable of avoiding a change in the number of stages of metal roof materials to be arranged on the roof surface due to the inclination of the roof surface. provide .

A roof construction method according to the present invention is a roof construction method in which a plurality of metal roof materials are arranged on a roof surface, and the metal roof materials are arranged to overlap the eaves side roof material and the eaves side roof material. The working width of the eaves-side roof material is adjusted according to the slope of the roof surface so that the horizontal projection dimension obtained by projecting the working width of the eaves-side roof material onto the horizontal plane is constant. wherein the metal roofing material is adapted to be placed on the roof surface such that the depth direction extends in the eaves direction of the roof surface, and the eaves side roofing material includes the determined A hanger is attached to the eaves-side edge of the eaves-side roofing material at a position apart from the ridge-side edge of the eaves-side roofing material by a predetermined distance in the depth direction so as to obtain a wide working width. , the hanger includes a hanger main body extending in the depth direction, and a first engaging portion provided on one end side of the hanger main body in the depth direction and engaged with the ridge-side edge of the eaves-side roof material. A first engaging portion provided with a first engaging end surface that abuts against the ridge-side end surface of the eaves-side roof material; A second engaging portion engaged with the eaves-side end portion of the side roof material, the second engaging portion provided with a second engaging end surface that abuts against the eaves-side end surface of the ridge-side roofing material. After the working width is determined, the hanger body corresponding to the working width is selected from a plurality of hanger bodies having different lengths, which is the separation distance between the first and second engaging end faces. is selected, and the selected hanger is attached to the eaves side roof material.

According to the roof construction method of the present invention, the working width of the eaves-side roof material is determined according to the slope of the roof surface so that the horizontal projection dimension obtained by projecting the working width of the eaves-side roof material onto the horizontal plane is constant. Therefore, it is possible to avoid a change in the number of stages of the metal roof materials to be arranged on the roof surface due to the inclination of the roof surface.

1 is a perspective view showing a metal roofing material used in a roof construction method according to Embodiment 1 of the present invention; FIG. It is explanatory drawing which shows the example in which the metal roofing material of FIG. 1 is arrange|positioned on the roof surface. Figure 2 is a cross-sectional view of the roofing material body along line III-III in Figure 1; FIG. 2 is a perspective view showing the hanger of FIG. 1; FIG. 5 is a perspective view showing a first modified example of the hanger of FIG. 4; 5 is a perspective view showing a second modification of the hanger of FIG. 4. FIG. 1 is a flow chart showing a roof construction method according to Embodiment 1 of the present invention. FIG. 10 is an explanatory diagram showing an embodiment in which the working width of the eaves-side roof material is determined according to the slope of the roof surface so that the horizontal projection dimension is constant; FIG. 10 is an explanatory diagram showing a comparative example in which the working width of the eaves-side roof material is constant regardless of the slope of the roof surface; FIG. 4 is a perspective view showing a metal roofing material used in a roof construction method according to Embodiment 2 of the present invention; 4 is a flow chart showing a roof construction method according to Embodiment 2 of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated with reference to drawings. The present invention is not limited to each embodiment, and can be embodied by modifying the constituent elements without departing from the scope of the invention. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in each embodiment. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, components of different embodiments may be combined as appropriate.

Embodiment 1.
FIG. 1 is a perspective view showing a metal roofing material 1 used in a roof construction method according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory view showing an example in which the metal roofing material 1 of FIG. 1 is arranged on a roof surface. 3 is a cross-sectional view of the roof material body 3 taken along line III-III in FIG. 1, and FIG. 4 is a perspective view showing the hanger 4 in FIG.

The metal roofing material 1 shown in FIG. 1 is a building member that is arranged on the roof surface of a building together with another metal roofing material 1 as shown in FIG. 2 to constitute the roof structure of the building. FIG. 2 shows an example in which a plurality of metal roof materials 1 are arranged on the roof surface of a gable roof. The roof surface on which the metal roofing material 1 is arranged may be a roof surface of another roof having a slope, such as a hipped roof or a gabled roof. As is well known, roof surfaces are designed to have various slopes. Factors that determine the slope of the roof surface include, for example, architectural conditions such as the location of the building, and exterior design.

As shown in FIG. 2, each metal roofing material 1 is arranged so that a part of the metal roofing material 1 on the ridge side overlaps the metal roofing material 1 on the eaves side with respect to the eaves ridge direction 2re of the building. The width of the eaves-side metal roofing material 1 protruding from the eaves-side end of the ridge-side metal roofing material 1 (the width in the eaves ridge direction 2re) is called the working width. The metal roof material 1 on the eaves side is called an eaves-side roof material 1E, and the ridge-side metal roof material 1 is sometimes called a ridge-side roof material 1R. The terms eaves-side roofing material 1E and ridge-side roofing material 1R are terms for distinguishing two metal roofing materials 1 related to the eaves-ridge direction 2re of the building, and are used to indicate specific positions in the entire roof. It is not stipulated. Another metal roofing material 1 may be arranged on the eaves side of the eaves-side roofing material 1E, and another metal roofing material 1 may be arranged on the ridge side of the ridge-side roofing material 1R.

The respective metal roof materials 1 are arranged so that their side ends are butted against each other with respect to the eaves direction 2e of the building. The ridge-side roof material 1R is arranged to be shifted in the eaves direction 2e by half the width of the metal roof material 1 with respect to the eaves-side roof material 1E. However, the arrangement of the metal roofing material 1 in the eaves direction 2e of the building is not limited to the mode of FIG. 2, and other modes can be adopted.

As shown in FIG. 1, the metal roofing material 1 has a roofing material main body 3 and a plurality of hangers 4 .

The roofing material body 3 of the present embodiment has a rectangular outer shape in a plan view having long sides and short sides. The direction in which the long sides extend is called the width direction 3w, and the direction in which the short sides extend is called the depth direction 3d. As shown in FIG. 2, the metal roofing material 1 of the present embodiment has a depth direction 3d extending in the eaves direction 2re of the roof and a width direction 3w extending in the eaves direction 2e of the roof surface. It is adapted to be placed on the roof surface. Note that the outer shape of the roof material body 3 may be a hexagon in plan view as shown in Japanese Patent Application Laid-Open No. 2018-003430.

As particularly shown in FIG. 3, the roofing material body 3 includes a front base material 30 made of a metal plate, a back base material 31 arranged on the back side of the front base material 30, and a front base material 30 and the back base material. It has a core material 32 filled between it and the material 31 .

The front base material 30 is a box-shaped metal plate having an opening on the back side, and is a member that appears on the outer surface of the roof when the metal roofing material 1 is placed on the roof surface. As the metal plate that is the material of the front substrate 30, hot-dip Zn-plated steel plate, hot-dip Zn-Al alloy plated steel plate, hot-dip Zn-Al-Mg alloy-plated steel plate, hot-dip Al-plated steel plate, hot-dip Zn-plated stainless steel plate, hot-dip Zn- Al alloy plated stainless steel plate, Hot dip Zn-Al-Mg alloy plated stainless steel plate, Hot dip Al plated stainless steel plate, Stainless steel plate, Al plate, Ti plate, Painted hot dip Zn plated steel plate, Painted hot dip Zn-Al alloy plated steel plate, Painted hot dip Zn -Al-Mg alloy plated steel sheet, painted hot dip Al plated steel sheet, painted hot dip Zn-plated stainless steel sheet, painted hot dip Al plated stainless steel sheet, painted stainless steel sheet, painted Al plate or painted Ti plate can be used.

The thickness of the metal plate is preferably 0.5 mm or less. As the thickness of the metal plate increases, the strength of the metal roofing material 1 increases, but the weight also increases. By setting the thickness of the metal plate to 0.5 mm or less, it is possible to prevent the weight of the metal roofing material 1 from becoming too large. In addition, it is preferable that the thickness of the metal plate is 0.27 mm or more. By setting the thickness of the metal plate to 0.27 mm or more, the strength required for the metal roofing material 1 can be secured, and sufficient wind pressure resistance can be obtained. The wind pressure resistance is the ability of the metal roofing material 1 to withstand strong winds without buckling.

The back base material 31 is arranged on the back side of the front base material 30 so as to close the opening on the back side of the front base material 30 . As the back base material 31, a lightweight material such as aluminum foil, aluminum vapor-deposited paper, aluminum hydroxide paper, calcium carbonate paper, resin film, or glass fiber paper can be used. By using these lightweight materials for the back base material 31, it is possible to avoid an increase in the weight of the metal roofing material 1. Moreover, as the back base material 31, the same metal plate as that constituting the front base material 30 may be used.

The core material 32 is made of foamed resin, for example, and is filled between the front base material 30 and the back base material 31 . By filling the space between the front base material 30 and the back base material 31 with the core material 32, the inside of the front base material 30 can be more easily absorbed than the mode in which a backing material such as a resin sheet is attached to the back side of the front base material 30. The core material 32 can be firmly adhered, and performance required for the metal roofing material 1 such as rain noise and heat insulation can be improved. As the core material 32, a preformed plate-like heat insulating foam may be used.

The material of the core material 32 is not particularly limited, and urethane, phenol, nurate resin, or the like can be used. However, it is desirable to use certified noncombustible materials for roofing materials. As a noncombustible material certification test, an exothermic test based on the ISO5660-1 cone calorimeter test method is carried out. When the foamed resin used as the core material 32 is urethane or the like, which generates a large amount of heat, the thickness of the front substrate 30 as a whole can be reduced, or inorganic foamed particles can be contained in the foamed resin.

The height of the internal space of the front substrate 30 filled with the core material 32 is preferably 4 mm or more and 8 mm or less. By setting the height of the internal space to 4 mm or more, the strength of the front substrate 30 can be sufficiently increased, and the wind pressure resistance can be improved. The heat insulation property is also improved when the thickness is 4 mm or more. In addition, by setting the height of the internal space to 8 mm or less, the organic mass of the core material 32 is prevented from becoming too large, so that the noncombustible material certification can be obtained more reliably.

Returning to FIG. 1, on the surface of the front base material 30, there are areas on both sides of the roof material body 3 in the width direction 3w, which are located on the eaves side when the metal roof material 1 is placed on the roof surface. A driving display section 33 is provided in the . The driving display portion 33 is configured to indicate the position at which a tightening member such as a nail or a screw is driven into the metal roofing material 1 . The input display portion 33 of the present embodiment is configured by a concave portion that is circular in plan view. However, the driving display portion 33 may adopt other forms, such as a projecting body, an opening, or a printed or engraved symbol, which allows the operator to visually or tactilely recognize the driving position of the tightening member.

<About hanging child>
As shown in FIG. 1, the hangers 4 are spaced apart from each other in the width direction 3w of the roofing material body 3, and fastened with, for example, screws or nails on one end side (ridge side) of the metal roofing material 1 in the depth direction 3d. It is tightly bound to the roof material main body 3 by a member.

As shown in FIG. 4 , the hanger 4 has a hanger main body 40 , a first engaging portion 41 and a second engaging portion 42 .

The hanger main body 40 is a flat plate portion extending in the depth direction 3 d of the roof material main body 3 .

The first engaging portion 41 is a portion to be engaged with the ridge-side edge 3e of the roof material main body 3, and is provided on one end side of the hanger main body 40 in the depth direction 3d. The first engaging portion 41 of the present embodiment is formed to have an L-shaped cross section. The first engaging portion 41 is provided with a first engaging end surface 41 a that contacts the ridge-side end surface of the roofing material body 3 .

The second engaging portion 42 is provided on the other end side of the hanger main body 40 in the depth direction 3d. The second engaging portion 42 of the present embodiment is formed to have a U-shaped cross section. The eaves-side end of the ridge-side roof material 1R is engaged with the second engaging portion 42 . The second engaging portion 42 is provided with a second engaging end surface 42a that contacts the eaves-side end surface of the ridge-side roofing material 1R.

Next, FIG. 5 is a perspective view showing a first modification of the hanger 4 of FIG. 4, and FIG. 6 is a perspective view showing a second modification of the hanger 4 of FIG. The hanger 4 of the first modified example shown in FIG. 5 has a shorter length of the hanger body 40 (the distance between the first and second engaging end surfaces 41a and 42a) than the hanger 4 shown in FIG. The hanger 4 of the second modified example shown in FIG. 6 has a shorter length of the hanger main body 40 than the hanger 4 of the first modified example shown in FIG. The position of the second engaging portion 42 from the ridge-side edge of the roof material body 3 is defined by the first engaging portion 41 and the hanger body 40 . By engaging the eaves-side end portion of the ridge-side roofing material 1R with the second engaging portion 42, the working width of the eaves-side roofing material 1E or the overlapping width of the eaves-side roofing material 1E and the ridge-side roofing material 1R is reduced. Determined. That is, by using the hangers 4 having different lengths of the hanger main bodies 40 as shown in FIGS. 4 to 6, the working width of the eaves-side roof material 1E can be changed.

Next, FIG. 7 is a flow chart showing a roof construction method according to Embodiment 1 of the present invention. The roof construction method of the present embodiment corresponds to a method (roof manufacturing method) for manufacturing a roof as shown in FIG. 2 using the metal roof material 1 shown in FIG. As shown in FIG. 7, the roof manufacturing method of the embodiment includes a working width determination step (step S1), a hanger selection and attachment step (step S2), and a roof material placement step (step S3). ing.

In the working width determination step (step S1), the working width of the eaves-side roof material 1E is determined according to the slope of the roof surface so that the horizontal projection dimension obtained by projecting the working width of the eaves-side roof material 1E onto the horizontal plane is constant. to decide. As mentioned above, roof surfaces are designed to have various slopes. In the roof construction method of the present embodiment, the working width of the eaves-side roof material 1E is determined so that the first roof surface having the first slope and the second roof surface having the second slope have the same horizontal projection dimension. do. Assuming that the angle of inclination of the eaves-side roof material 1E with respect to the horizontal plane is θ and the working width of the eaves-side roof material 1E is W, the horizontal projection dimension H is expressed by H=W·cos θ. The working width W is determined according to the inclination angle θ so that the horizontal projection dimension H takes a constant value.

In the step of selecting and attaching the hanger (step S2), a predetermined width is obtained from the ridge side edge 3e of the eaves side roof material 1E in the depth direction 3d so as to obtain the working width W determined in the working width determination step (step S1). A hanger 4 with which the eaves-side end of the ridge-side roof material 1R is engaged at a position spaced apart by the dimension of is selected. Specifically, the hanger 4 having the length of the hanger main body 40 (the distance between the first and second engaging end surfaces 41a and 42a) corresponding to the determined working width W is selected. In the step of selecting and attaching the hanger (step S2), the selected hanger 4 is attached to the roof material body 3 to form the metal roof material 1 shown in FIG.

In this embodiment, the selected hangers 4 are attached to the roof material main body 3. However, a plurality of types of metal roofs to which the hangers 4 having different lengths of the hanger main bodies 40 are attached. A material 1 is prepared in advance, and a metal roofing material 1 to which a hanger 4 corresponding to the working width W determined in the working width determination process (step S1) is attached is selected from a plurality of types of metal roofing materials 1. You may

In the roof material arrangement step (step S3), the metal roof material 1 to which the hangers 4 are attached in the hanger selection and attachment step (step S2) is arranged on the roof surface to form the roof shown in FIG. At this time, while the eaves-side end of the ridge-side roofing material 1R is engaged with the second engaging portion 42 of the hanger 4 of the eaves-side roofing material 1E, the ridge-side roofing material 1R is placed on top of the eaves-side roofing material 1E. Place the eaves side edges on top of each other.

Next, the effect of setting the horizontal projection dimension to a constant dimension will be described. FIG. 8 is an explanatory view showing an embodiment in which the working width of the eaves-side roof material 1E is determined according to the slope of the roof surface so that the horizontal projection dimension is constant. FIG. 10 is an explanatory diagram showing a comparative example in which the working width of the eaves-side roof material 1E is constant; When the metal roofing material 1 is actually placed on the roof surface, there is a slight difference between the inclination of the roof surface and the inclination of the metal roofing material 1, but this difference is negligibly small.

8 and 9, (a) shows a case where the roof slope is 3 inches, (b) shows a case where the roof slope is 4.5 inches, and (c) shows a case where the roof slope is 6 inches. ing. For example, a roof slope of 3 inches means a slope of 10 inches in horizontal dimension and 3 inches in rising dimension. One sun is 1/33m (about 30.303mm). A 3-inch roof slope is 16.6992 degrees, a 4.5-inch roof slope is 24.2277 degrees, and a 6-inch roof slope is 30.9638 degrees. .

As shown in FIG. 8, when the working width of the eaves-side roof material 1E is determined according to the slope of the roof surface so that the horizontal projection dimension H is a constant dimension, the working width of the eaves-side roof material 1E is determined according to the roof slope. width changes. In other words, the horizontal projection dimension H can be kept constant by increasing the working width in accordance with the increase in the roof slope. Assuming that the working widths for roof slopes of 3, 4.5, and 6 inches are W1 to W3, the relationship W1<W2<W3 holds when the horizontal projection dimension H is a constant dimension.

In the embodiment shown in FIG. 8, the section S can be covered with four metal roof materials 1 regardless of the roof slope. That is, the working width of the eaves-side roof material 1E is determined according to the slope of the roof surface so that the horizontal projection dimension H obtained by projecting the working width of the eaves-side roof material 1E onto the horizontal plane is constant. It is possible to avoid a change in the number of steps of the metal roof material to be arranged on the roof surface due to the slope.

On the other hand, as shown in FIG. 9, when the working width W of the eaves-side roof material 1E is constant regardless of the slope of the roof surface, when the roof slope is 3 cm (FIG. 9A), the section S can be covered with four metal roofing materials 1, but section S cannot be covered with four metal roofing materials 1 when the roof slope is 6 cm ((c) in FIG. 9). That is, the number of stages of the metal roofing materials to be arranged on the roof surface changes depending on the slope of the roof surface.

According to the roof construction method of this embodiment, the eaves-side roof material is adjusted according to the slope of the roof surface so that the horizontal projection dimension H obtained by projecting the working width of the eaves-side roof material 1E onto the horizontal plane is constant. Since the working width of 1E is determined, it is possible to avoid a change in the number of steps of the metal roof material 1 to be arranged on the roof surface due to the slope of the roof surface.

Further, according to the roof construction method and the metal roofing material 1 as in the present embodiment, the ridge-side roofing material 1R is separated from the ridge-side edge 3e of the eaves-side roofing material 1E by a predetermined distance in the depth direction 3d. is attached to the eaves-side roof material 1E, the eaves-side end of another metal roof material 1 (ridge-side roof material 1R) is engaged with the hanger 4. The metal roofing material 1 can be arranged so that the horizontal projection dimension becomes constant by only one step, and the change in the number of steps of the metal roofing material 1 to be arranged on the roof surface due to the inclination of the roof surface can be more easily avoided.

Further, since the hanger 4 has the hanger main body 40, the first engaging portion 41 and the second engaging portion 42, by changing the length of the hanger main body 40, the eaves side roof material 1E can be working width can be more reliably changed, and it is possible to more reliably avoid a change in the number of steps of the metal roof material 1 to be arranged on the roof surface due to the slope of the roof surface.

Embodiment 2.
FIG. 10 is a perspective view showing a metal roofing material 1 used in a roof construction method according to Embodiment 2 of the present invention. In the first embodiment, it has been described that the working width of the eaves-side roof material 1E can be changed by using different hangers 4. FIG. On the other hand, as shown in FIG. 10, first to third display portions 51 and 52 indicate positions at which the eaves-side edge of another metal roofing material 1 (ridge-side roofing material 1R) should be aligned according to the slope of the roof surface. , 53 (a plurality of display portions) are provided on the surface of the front base material 30 of the metal roofing material 1, and the working width of the eaves side roofing material 1E is changed based on these first to third display portions 51, 52, 53. You may

The first to third display portions 51, 52, 53 are arranged apart from each other in the depth direction 3d. The first display portion 51 may be for a 3 inch roof slope, the second display portion 52 may be for a 4.5 inch roof slope, and the third display portion 53 may be for a 6 inch roof slope. The number of such displays may be two or four or more.

The first to third display portions 51, 52, 53 may be provided in a part of the roof material body 3 in the width direction 3w, but they extend over the entire roof material body 3 in the width direction 3w. is preferred. This is because the eaves-side edge of the separate metal roofing material 1 (ridge-side roofing material 1R) can be aligned more reliably. The first to third display portions 51, 52, 53 can be composed of one or more projections linearly extending along the width direction 3w. A plurality of protrusions forming the first to third display portions 51, 52, 53 are arranged apart from each other in the width direction 3w. Positions at which the plurality of protrusions forming the first display portion 51 are separated from each other, positions at which the plurality of protrusions forming the second display portion 52 are separated from each other, and positions at which the plurality of protrusions forming the third display portion 53 are separated from each other. Preferably, the positions at which the parts are spaced apart are aligned with each other. That is, it is preferable that the flat portions between the protrusions are arranged in a straight line in the depth direction 3d. By aligning the positions at which the protrusions are spaced apart from each other, it is possible to suppress the obstruction of the water flow by the protrusions. The first to third display portions 51, 52, 53 are, for example, recessed portions or printed or engraved symbols, etc., where the eaves side edge of another metal roofing material 1 (ridge side roofing material 1R) should be aligned. may be visually or tactilely recognized by the operator.

The metal roofing material 1 of Embodiment 2 is also provided with an embedded display portion 33 at a location positioned on the ridge side when the metal roofing material 1 is placed on the roof surface. Other configurations are the same as those of the metal roofing material 1 of the first embodiment.

Next, FIG. 11 is a flow chart showing a roof construction method according to Embodiment 2 of the present invention. The roof construction method of Embodiment 1 includes the step of selecting and attaching the hangers (step S2). However, in the roof construction method according to Embodiment 2, the step of selecting and attaching the hanger (step S2) is omitted. In the roof material arrangement step (step S3), the metal roof material 1 is arranged based on the first to third display portions 51 to 53 for obtaining the working width W determined in the working width determination step (step S1). Other configurations are the same as those of the roof construction method of the first embodiment.

According to the roof construction method and the metal roofing material 1 as in this embodiment, the eaves side edges of the separate metal roofing material 1 are arranged apart from each other in the depth direction 3d according to the slope of the roof surface. Since the first to third display parts 51 to 53 (a plurality of display parts) indicate the positions to be aligned, the eaves side edge of another metal roof material 1 is indicated by any one of the first to third display parts 51 to 53 The metal roof material 1 can be arranged so that the horizontal projection dimension becomes constant just by matching with the roof surface, and the change in the number of stages of the metal roof material to be arranged on the roof surface due to the slope of the roof surface can be more easily avoided. .

The hanger 4 described in the first embodiment may be attached to the metal roofing material 1 of the second embodiment.

1 metal roofing material 1E eaves side roofing material 1R ridge side roofing material 4 hanger 40 main body of hanger 41 first engaging portion 42 second engaging portion

Claims (2)

A roof construction method for arranging a plurality of metal roofing materials on a roof surface, wherein the metal roofing materials include an eaves-side roofing material and a ridge-side roofing material that is laid over the eaves-side roofing material. is included and
determining the working width of the eaves-side roof material according to the slope of the roof surface so that the horizontal projection dimension obtained by projecting the working width of the eaves-side roof material onto a horizontal plane is constant;
The metal roofing material is adapted to be placed on the roof surface such that the depth direction extends in the eaves direction of the roof surface,
In the eaves-side roofing material, the eaves side of the ridge-side roofing material is provided at a position apart from the ridge-side edge of the eaves-side roofing material in the depth direction by a predetermined dimension so as to obtain the determined working width. A hanger with which the ends are engaged is attached,
The hanger is
a hanger main body extending in the depth direction;
A first engaging portion provided on one end side of the hanger main body in the depth direction and engaged with the ridge-side edge of the eaves-side roof material, the first engaging portion being engaged with the ridge-side edge of the eaves-side roof material. a first engaging portion provided with a first engaging end face that abuts against the end face ;
A second engaging portion provided on the other end side of the hanger main body in the depth direction and engaged with the eaves side end portion of the ridge side roof material , the second engaging portion being engaged with the eaves side of the ridge side roof material. a second engaging portion provided with a second engaging end surface that abuts on the end surface of the
After the working width is determined, the hanger corresponding to the working width is selected from among a plurality of the hangers having different lengths of the hanger body, which is the separation distance between the first and second engaging end faces. The hanger having the length of the main body is selected, and the selected hanger is attached to the eaves side roof material.
roof construction method. The metal roofing material is adapted to be placed on the roof surface such that the depth direction extends in the eaves direction of the roof surface,
The metal roofing material is provided with a plurality of display portions which are spaced apart from each other in the depth direction and which indicate the position where the eaves side edge of the ridge side roofing material should be aligned according to the slope of the roof surface. and
Each of the plurality of display portions is composed of a plurality of protrusions linearly extending along the width direction of the metal roofing material, and the plurality of protrusions constituting each display portion are arranged in the width direction. are spaced apart from each other, and the positions at which the plurality of protrusions constituting each display unit are spaced apart from each other are aligned with each other,
The roof construction method according to claim 1.

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