Construction method of horizontally roofed roof

Abstract

To provide a construction method of a horizontally roofed roof in which horizontally roofing materials are constructed from an upstream side to a downstream side without limiting a base structure (using special retaining members).SOLUTION: In a construction method of a horizontally roofed roof, a roof is constructed from an upstream side to a downstream side, and an insulation material has an overlap receiving portion extending to an upstream side on its back side and an overlap portion extending to a downstream side on its front side. A horizontally roofing material comprises: a panel portion covering the overlap portions of neighboring insulation materials; a shaped portion at its upstream side end bent toward the front side; an engaging portion at its downstream side end folded back to a back side; and a shaped portion having an extension piece whose tip is further folded back and extends to the downstream side. The construction method of a horizontally roofed roof comprises: a first step in which the overlap receiving portion of the insulation material at the downstream side is inserted into and overlapped with the overlap portion of the insulation material at the upstream side; a second step in which the shaped portion of the neighboring horizontally roofing material at the downstream side is inserted into and engaged with the engaging portion attached to the insulation material at the upstream side; a third step in which the extension piece of the horizontally roofing material is fixed with a fixing device; and repeating the first to third steps.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method of laying horizontal roofing materials from above water to below water without limiting the base structure (using special retaining members). [Background technology]

[0002] Conventionally, horizontal roofing was generally done by laying roofing materials from the eaves (below the water) side to the ridge (above the water) side. This method requires the installation of large-scale scaffolding, so the applicant proposed a method of laying roofing materials from the ridge (above the water) side to the eaves (below the water) side in Patent Document 1, and found that it could significantly reduce the labor required for scaffolding installation and shorten the construction period. Furthermore, with the construction method of laying roofing material from the below-water side to the above-water side, there was a risk that rainwater, dirt, dust, and fallen leaves would seep into the underside of the roofing material at the boundary between the installed roofing material and the uninstalled part, causing corrosion, or that workers would step on the installed roofing material. However, the construction method of laying roofing material from the above-water side to the below-water side described in Patent Document 1 eliminates such risks. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-222809 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the construction method of the above-mentioned Patent Document 1 requires a special retaining member, i.e., a "long retaining member with an engagement groove along the longitudinal direction," and cannot be attached to any base. In addition, the installation process of the retaining member is also required.

[0005] Therefore, the present invention aims to propose a method of laying horizontal roofing materials in which horizontal roofing materials are laid from the above-water side to the below-water side without limiting the base structure (using special retaining members). [Means for solving the problem]

[0006] The present invention has been proposed in view of the above, and is a method of constructing a horizontal roof by disposing a horizontal roofing material on the front side of a thermal insulation material and constructing the roof from above the water side to below the water side, the thermal insulation material has an overlapping receiving portion at the above-water end where the back side extends toward the above-water side, and an overlapping portion at the below-water end where the front side extends toward the below-water side, the horizontal roofing material comprises a face plate portion that covers at least the portion where the overlapping receiving portion of the thermal insulation material below the water side overlaps with the overlapping portion of the thermal insulation material above the water side, an above-water side forming portion bent toward the front side at the above-water end, an engagement portion folded back toward the back side at the below-water end, and and an underwater side molding portion having an extension piece whose tip is further folded back and extended toward the underwater side, the method comprising: a first step in which the overlapping receiving portion of the insulation material on the belowwater side is overlapped in an insert-like manner with the overlapping portion of the insulation material on the abovewater side; a second step in which the abovewater side molding portion of the horizontal roofing material adjacent to the belowwater side is engaged in an insert-like manner with the engaging portion attached to the insulation material on the abovewater side; and a third step in which the extension piece of the horizontal roofing material is fixed with a fixing device, and a construction method for a horizontal roof comprising repeating the first to third steps.

[0007] Furthermore, the present invention also proposes a method of construction for a horizontal roof, characterized in that in the above-water side, the insulation material has a step portion which is thick-walled on the above-water side and thin-walled on the below-water side, and in the second step, the below-water side molded portion of the horizontal roof material engages with this step portion. Effect of the Invention

[0008] The horizontal roof construction method of the present invention is a method for constructing horizontal roofing materials from above the water side to below the water side without limiting the structure of the base structure and without using special retaining members, and each of the first to third steps of the construction method can be easily carried out. Therefore, as with the aforementioned method of construction from below the waterline to above the waterline, rainwater, dust, and fallen leaves cannot get into the back of the horizontal roofing material through the boundary between the installed roofing material and the uninstalled material, and there is no risk of workers stepping on the installed horizontal roofing material.The back side of the insulation material can be either an existing roof such as slate or a sheathing board, and it can be used for both renovations and new construction. In addition, this construction method uses insulation material that has an overlapping receiving portion at the above-water end where the back side extends above the water, and an overlapping portion at the below-water end where the front side extends below the water, so that an insulation layer with no gaps can be formed and the exterior material placed on the front side can be reliably supported from the back side. Furthermore, a horizontal roofing material is used that has a panel portion that covers the portion where the above-water side overlaps with the below-water side overlapping receiving portion, an above-water side molded portion that is bent toward the surface at its above-water end, and a below-water side molded portion that has an engaging portion and an extension piece.This makes it possible to shift the positions of the connection portions (overlapped portions) of the insulation materials adjacent to each other in the flow direction and the connection portions (engaging portions) of the horizontal roofing material, making it difficult for rainwater to penetrate.

[0009] Furthermore, the insulation material has a step portion that is thick on the above-water side and thin on the below-water side, and when the below-water side molded portion of the horizontal roofing material is engaged with this step portion in the second step, the work of driving fasteners into the extension pieces of the horizontal roofing material can be carried out stably in the third step. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1A is a side view showing a first step in the construction method of Example 1 of the present invention, FIG. 1B is a side view showing a second step, and FIG. 1C is an enlarged side view of the insulating material used. [Diagram 2] FIG. 2(a) is a side view showing the third step in the construction method of the first embodiment of the present invention, (b) is a side view showing the horizontal roof after construction, and (c) is an enlarged side view of the horizontal roof material used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The method of constructing a horizontal roof of the present invention involves constructing a roof with horizontal roofing material placed on the surface side of an insulating material from the above-water side to the below-water side, and the insulating material has an overlapping receiving portion at its above-water end where the back side extends toward the above-water side, and an overlapping portion at its below-water end where the front side extends toward the below-water side, and the horizontal roofing material is equipped with a panel portion that covers at least the portion where the overlapping portion of the insulating material on the below-water side overlaps with the overlapping receiving portion of the insulating material on the above-water side, an above-water side molding portion bent toward the surface side at the above-water end, and an under-water side molding portion having an engaging portion folded back to the back side at the below-water end, and an extension piece whose tip is further folded back to extend to the below-water side. The method is characterized by comprising a first step in which the overlapping receiving portion of the insulation material on the belowwater side is overlapped in an insert-like manner with the overlapping portion of the insulation material on the abovewater side, a second step in which the abovewater side molding portion of the adjacent horizontal roofing material on the belowwater side is engaged in an insert-like manner with the engaging portion attached to the insulation material on the abovewater side, and a third step in which the extension piece of the horizontal roofing material is fixed with a fixing device, and repeating the first to third steps.

[0012] As described above, the insulation material used in the construction method of the present invention has an overlapping receiving portion at its above-water end with the back side extending above the water, and an overlapping portion at its below-water end with the front side extending below the water. This insulation material is preferably a water-impermeable material, but this is not necessarily limited to this. It is preferable that the insulation material be made of a low-resilience, water-impermeable elastic material, such as the insulation material in the illustrated embodiment described below, and that the material's shape characteristics can be changed as desired. These polymerization receiving portions and polymerization portions may be configured as a rectangular polymerization receiving portion having a cut-out upper half portion (surface layer portion) and a polymerization portion having a cut-out lower half portion (back layer portion) as in the illustrated example described below, and there are no particular limitations on the specific configuration as long as they are mutually polymerizable. It is desirable for this insulation material to have a step portion that is thicker on the above-water side and thinner on the below-water side, and it is desirable for this step portion to be formed approximately near the center of the width in the flow direction, as in the illustrated example described below.

[0013] In addition, the horizontal roofing material used in the construction method of the present invention comprises a panel portion that covers at least the portion where the overlapping portion of the insulation material on the belowwater side overlaps with the overlapping receiving portion of the insulation material on the abovewater side, and an abovewater side molding portion bent toward the front side at its abovewater end, and an belowwater side molding portion having an engaging portion folded back to the back side at its belowwater end, and an extension piece whose tip is further folded back and extended to the belowwater side. This horizontal roofing material can be any type of horizontal roofing material in which adjacent horizontal roofing materials engage with each other, and can be galvalume steel sheet (registered trademark) or any other type of metal sheet.It can be configured so that it is separated from the insulation material on the back side by a space, or it can be configured so that the insulation material is closely attached to the back side of the horizontal roofing material as in the illustrated example described below. Regarding the face plate, above-water side molded part, and below-water side molded part, in the illustrated embodiment described later, the flat part formed by bending the above-water end in an arc shape toward the front side is the above-water side molded part, and the flat part extending from this to the below-water side is the face plate, but this is not particularly limited to these. Also, in the illustrated embodiment described later, the engagement part is molded in a U-shape, and the below-water end of the extension piece is bent toward the back side, but this is not particularly limited to these.

[0014] In the construction method of the present invention, as described above, in the first step, the overlapping portion of the insulation material on the below-water side is overlapped in an insert-like manner with the overlapping portion of the insulation material on the above-water side. In this process, the insulation material on the underwater side is placed at an angle (so that the overlapping receiving part at the water-surface end is lower) to face the overlapping part of the insulation material attached on the abovewater side, and the overlapping receiving part is arranged so that it is overlapped in an inserted manner. At that time, the overlapping part of the insulation material on the abovewater side is lifted upward and the insulation material on the belowwater side is pushed in so that the inserted overlapping receiving part is positioned in close contact with the back surface of the overlapping part, thereby causing deep overlapping.

[0015] In the second step, the above-water side molding portion of the adjacent horizontal roofing material on the below-water side is inserted into the engagement portion attached to the above-water side insulation material. In this step, the insulation material installed in the first step is not fixed, but the insulation material is held down with hands and knees while the horizontal roofing material is brought in at an angle (so that the above-water side molding part at the above-water end is lower), and the above-water side molding part is inserted into the engaging part of the below-water side molding part of the above-water side horizontal roofing material that has already been installed. Furthermore, if the insulation material has a step portion, the engaging portion of the below-water side molding portion engages with this step portion, allowing the subsequent third step to be carried out stably, in which the fasteners are driven into the extension pieces of the horizontal roof material.

[0016] In the third step, the extension pieces of the horizontal roofing material are fixed with fasteners. In this process, general-purpose fasteners such as screws can be used, and the horizontal roofing material, which has been angled in the second process and has the above-water side molded portion inserted, is tilted so that it aligns with the insulation material, and then the fastener is hammered into the extension piece that is aligned with the insulation material to secure it in place. Furthermore, since this fixing device secures not only the horizontal roofing material but also the insulation material on the back side, in the illustrated embodiment described below, it penetrates the sheathing material on the back side of the insulation material and its tip reaches (is fixed to) the structure on the back side. Then, the first to third steps are repeated to construct the horizontal roof.

[0017] In the first step, the horizontal roofing material is already attached to the above-water side, and the fixing devices are also fixed to the extension pieces of this horizontal roofing material as in the third step. However, when the adjacent horizontal roofing material is arranged on the below-water side in the second step, the above-water side molded part is inserted so as to cover the fixed part (the part where the fixing devices are driven in).

[0018] In addition, the base to which the construction method of the present invention is applied, i.e., the structure of the back side of the insulation material, is not particularly limited as long as it has a slope, and can be applied to any base. For example, it can be a structure in which a roofing material is laid on a framework as in the illustrated example described later, or an existing roof such as slate, and can be applied to both renovation and new construction.

[0019] The horizontal roof construction method of the present invention, which is constructed in this manner, is a construction method in which the horizontal roof material is constructed from the above-water side to the below-water side without limiting the structure of the base structure and without using special retaining members, and each of the first to third steps of the construction method can be easily performed. Therefore, as in the construction method described above in which the roofing material is laid from below the waterline to above the waterline, rainwater, dust, and fallen leaves cannot get in through the gap between the installed roofing material and the uninstalled material and there is no risk of workers stepping on the installed roofing material.The back side of the insulation can be either an existing roof such as slate or a sheathing board, and the method can be used for both renovations and new constructions. In addition, this construction method uses insulation material that has an overlapping receiving portion at the above-water end where the back side extends above the water, and an overlapping portion at the below-water end where the front side extends below the water, so that an insulation layer with no gaps can be formed and the exterior material placed on the front side can be reliably supported from the back side. Furthermore, a horizontal roofing material is used that has a panel portion that covers the overlapping portion of the insulation material (the portion where the overlapping portion and the overlapping receiving portion overlap), an above-water side molded portion that is bent toward the surface at its above-water end, and a below-water side molded portion that has an engagement portion and an extension piece.This makes it possible to shift the positions of the connection portions (overlapped portions) of the insulation materials that are adjacent in the flow direction and the connection portions (engagement portions) of the horizontal roofing material, making it difficult for rainwater to penetrate.

[0020] In addition, by forming a step portion in which the above-water side is thicker and the below-water side is thinner, the below-water side molding of the horizontal roofing material can engage with this step portion in the second step, and the work of driving fasteners into the extension pieces of the horizontal roofing material can be carried out stably in the third step. EXAMPLES

[0021] The first step of Example 1 of the present invention shown in Figure 1(a) shows a state in which the overlapping portion 23 of the insulation material 2 on the above-water side shown on the right side of the figure is overlapped in an insert-like manner with the overlapping receiving portion 22 of the insulation material 2 on the below-water side shown on the left side of the figure. In this first step, the insulation material 2 on the belowwater side is placed at an angle facing the overlapping portion 23 of the insulation material 2 attached on the abovewater side so that the overlapping receiving portion 22 at the abovewater end is lower, and the overlapping receiving portion 22 is arranged so that it is overlapped in an interleaved manner. At this time, the overlapping portion 23 of the insulation material 2 above the water is lifted upward or the insulation material 2 below the water is pushed in so that the inserted overlap receiving portion 22 is positioned in close contact with the back surface of the overlapping portion 23, thereby achieving deep overlapping.

[0022] The insulation material 2 used in this Example 1 has an overlapping portion 22 at its above-water end where the back layer portion extends above the water, as shown enlarged in Figure 1(c), and an overlapping portion 23 at its below-water end where the surface layer portion extends below the water. This insulation material 2 is formed from a low-resilience, non-water-permeable elastic material (expanded polystyrene), and the polymerization receiving portion 22 has a shape in which the upper half (surface portion) of a rectangle is cut out, and the polymerization portion 23 has a shape in which the lower half (back layer portion) is cut out, and these can be polymerized, but the polymerization receiving portion 22 is formed with a concave portion 221 to allow infiltrating water to flow downstream. In addition, this insulation material 2 has a step portion 24 formed approximately in the center in the flow direction, where the above-water side 21a of the body portion 21, excluding the polymerization portion 23 and the polymerization receiving portion 22, is thick-walled and the below-water side 21b is thin-walled, and a concave portion 241 is formed in the step portion 24.

[0023] Furthermore, although the surface shape of this insulation material 2 is not described in detail, its cross-sectional shape has an uneven structure as shown by dotted lines, with the convex portions supporting the horizontal roof boards 1 and forming a path for rainwater that has penetrated the concave portions to flow downward. The flow path of rainwater is shown roughly by dotted arrows in this cross section, and is led from the recess 221 provided in the overlapping receiving portion 22 through the dotted arrows to the next level of insulation material 2 (adjacent on the downstream side).

[0024] In the second step shown in Figure 1(b), the above-water side molding portion 12 of the adjacent horizontal roofing material 1 on the below-water side is engaged in a plug-in manner with the engaging portion 131 attached to the above-water side insulation material 2 shown on the right side of the figure. In this second step, the insulating material 2 installed in the first step is not fixed, but while holding the insulating material 2 with hands and knees, the horizontal roofing material 1 is tilted so that the above-water side molded part 12 at the above-water end is lower, and the above-water side molded part 12 is inserted into the engagement part 131 of the below-water side molded part 13 of the above-water side horizontal roofing material 1 that has already been installed. At this time, the above-water side molded part 12 is arranged so as to cover the fastener 1b that fixes the above-water side horizontal roofing material 1. As described above, a step portion 24 is formed in the insulation material 2 on the back side, so that by simply arranging the horizontal roofing material 1 in an inclined manner, the engagement portion 131 of the below-water side molding portion 13 engages with this step portion 24, and the work of driving the fixing device 1b into the extension piece 132 in the subsequent third step can be carried out stably.

[0025] In the third step shown in FIG. 2(a), the extension piece 132 of the horizontal roofing material 1 is fixed by the fastener 1b. In this third step, since the horizontal roofing material 1 arranged in the second step is not fixed, the fasteners 1b are driven into the extension pieces 132 to fix them. Furthermore, this fixing device 1b can be a general-purpose long-leg screw as shown in the figure, and it penetrates the sheathing material 3 on the back side of the insulation material 2 so that not only the horizontal roofing material 1 but also the insulation material 2 on the back side is fixed, and is then fixed to the main body 4 on the back side. Then, the first to third steps are repeated to construct the horizontal roof.

[0026] FIG. 2(b) shows a horizontal roof constructed by repeating the first to third steps. To briefly explain the base structure, i.e., the structure on the back side of the insulation material 2, in this Example 1, a sheathing material 3 of a predetermined thickness is laid on the upper surface of a body 4 arranged at an angle. As described above, this base structure does not require special retaining members or shape configurations, so it can be applied to existing roofs such as slate roofs, and can be adapted to both renovations and new constructions.

[0027] In this way, the horizontal roof construction method of Example 1 is a method of constructing horizontal roofing material 1 from the above-water side to the below-water side without limiting the structure of the base structure and without using any special retaining members, and each of the first to third steps of the construction method can be easily performed. Therefore, as in the previously mentioned method of construction where construction is carried out from below the waterline to above the waterline, rainwater, dust, and fallen leaves will not penetrate to the back side of the horizontal roofing material 1 through the boundary between the installed horizontal roofing material 1 and the uninstalled material, and there is no risk of workers stepping on the installed roofing material.The back side of the insulation material 2 can be either an existing roof such as slate or a sheathing board, and the method can be used for both renovations and new constructions. Furthermore, this construction method uses insulation material 2 that has an overlapping receiving portion 22 at its above-water end with its back side extending above the water, and an overlapping portion 23 at its below-water end with its front side extending below the water, thereby forming an insulation layer with no gaps and allowing the horizontal roof material 1 placed on the front side to be reliably supported from the back side. Furthermore, the horizontal roofing material 1 used has a panel portion 11 that covers the portion where the above-water side overlapping receiving portion 22 and the below-water side overlapping portion 23, an above-water side molded portion 12 that is bent toward the surface at its above-water end, and a below-water side molded portion 13 that has an engagement portion 131 and an extension piece 132, so the positions of the connection portion (overlap portion) of the insulation materials 2, 2 adjacent to each other in the flow direction and the connection portion (engagement portion) of the horizontal roofing materials 1, 1 can be shifted, making it difficult for rainwater to penetrate.

[0028] Furthermore, in this embodiment 1, the insulation material 2 has a step portion 24 which is thick on the above-water side and thin on the below-water side, and in the second step described above, the below-water side molding portion 13 of the horizontal roofing material 1 is engaged with this step portion 24, so that the work of driving the fasteners 1b into the extension pieces 132 of the horizontal roofing material 1 in the third step described above can be carried out stably. [Explanation of symbols]

[0029] 1. Horizontal roofing material 11 Face plate part 12 Water side molding part 13 Underwater molding section 131 Engagement part 132 Extended piece 1b Fixture 2. Insulation 21 Torso 22 Overlapped receiving part 23 Polymerization section 24 Step 3 Wild wood 4 skeleton

Claims

1. A horizontal roof construction method in which a horizontal roofing material is arranged on the surface side of a thermal insulation material and the roof is constructed from the above-water side to the below-water side, The heat insulating material has an overlap receiving portion at an above-water end whose back surface side extends above the water, and has an overlap portion at an underwater end whose front surface side extends below the water, The horizontal roofing material comprises a face plate portion that covers at least the portion where the overlapping portion of the insulation material on the above-water side overlaps with the overlapping receiving portion of the insulation material on the below-water side, an above-water side molding portion bent toward the front side at its above-water end, an engaging portion bent back toward the back side at its below-water end, and an under-water side molding portion having an extension piece whose tip is further folded back and extended toward the below-water side, A first step in which the overlapping portion of the insulating material on the water side is overlapped with the overlapping portion of the insulating material on the water side in an insert-like manner; A second step in which the above-water side molding portion of the horizontal roofing material adjacent to the below-water side is inserted into the engagement portion attached to the above-water side insulation material; A third step in which the extension piece of the horizontal roofing material is fixed with a fixing device; A method for constructing a horizontal roof, comprising repeating steps 1 to 3.

2. A method for constructing a horizontal roof as described in claim 1, characterized in that the insulation material has a step portion that is thick on the above-water side and thin on the below-water side, and in the second step, the below-water side molded portion of the horizontal roof material engages with this step portion.

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