How to fix the waterproof sheet

Abstract

To provide a waterproof sheet fixing method capable of firmly supporting a sheet fixing tool on a waterproof substrate by a simple method while considering soundproofing, vibration-proofing, dust-proofing, etc.SOLUTION: In a waterproof sheet fixing method, a waterproof sheet 4 is laid on surface layers 2, 3 including a heat insulating material 2 laid directly on a waterproof substrate 1, and the waterproof sheet 4 is fixed to the waterproof substrate 1 by using a sheet fixing tool 61. The waterproof sheet fixing method includes: a drilling step in which holes 2h are drilled in the surface layers 2, 3 to expose the waterproof substrate 1; a filling step in which adhesive 8 is filled into the holes 2h; an inserting step of inserting a base member 62 capable of connecting and fixing the sheet fixing tool 61 into the hole part 2h before the adhesive 8 filled in the hole part 2h is cured; and a connecting step of connecting and fixing the sheet fixing tool 61 to the base member 62 from above the surface layers 2, 3.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a waterproof sheet fixing method for fixing a waterproof sheet to a waterproof substrate. [Background technology]

[0002] When laying a waterproof sheet on a waterproof foundation on the roof of a building, generally, bolt holes are drilled in the waterproof foundation, a sheet fixing device is bolted to the waterproof foundation, and the waterproof sheet is fixed to the sheet fixing device. Such waterproof sheet laying work is generally performed not only in new construction work but also in renovation work, and in recent years, it has become particularly important to consider sound insulation, vibration prevention, dust prevention, etc. For example, in Patent Document 1, a surface layer ("existing waterproof layer" in the document) is laid directly on the waterproof foundation ("deck plate" in the document), and a waterproof sheet is laid on the surface layer. The waterproof sheet is fixed to the waterproof foundation by a fastening type fixing means, and in this fastening type fixing means, a part of the surface layer is hollowed out to expose the waterproof foundation, and a base member ("base side fixing member" in Patent Document 1) is fixed to the exposed waterproof foundation by adhesion. Then, the hollowed out surface layer is backfilled, and a sheet fixing device ("sheet side fixing member" in Patent Document 1) is connected and fixed to the base member. The method disclosed in Patent Document 1 is superior in terms of soundproofing, vibration proofing, and dust proofing compared to a method in which bolt holes for bolt fixing are drilled into a waterproof base. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-203337 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the waterproof sheet swells due to the wind, vertical and horizontal stresses act on the sheet fixing device and the base member. In the configuration disclosed in Patent Document 1, adhesive is applied to the surface portion of the exposed waterproof base, and only the lower end of the base member comes into contact with the adhesive. For this reason, the adhesive that fixes the base member to the base is required to have adhesive strength and durability so that the base member can continue to be fixed against such stress. In particular, due to factors such as recent climate change, there is a demand for a method that can fix the waterproof sheet more firmly than before. However, since adopting an expensive construction method that assumes every possible situation will hinder its widespread use, there is also a demand for a simple method that suppresses costs.

[0005] An object of the present invention is to provide a waterproof sheet fixing method capable of firmly supporting a sheet fixing device on a waterproof base in a simple manner while taking into consideration soundproofing, vibration proofing, dustproofing, etc. [Means for solving the problem]

[0006] The present invention is a waterproof sheet fixing method for laying a waterproof sheet on a surface layer including a heat insulating material laid directly on a waterproof foundation and fixing the waterproof sheet to the waterproof foundation using a sheet fixing tool, which is characterized by including a drilling step of drilling holes in the surface layer to expose the waterproof foundation, a filling step of filling the holes with adhesive, an inserting step of inserting a base member capable of connecting and fixing the sheet fixing tool into the hole before the adhesive filled in the hole hardens, and a connecting step of connecting and fixing the sheet fixing tool to the base member from above the surface layer. The present invention is also a waterproof sheet fixing method for laying a waterproof sheet on a surface layer including a heat insulating material laid directly on a waterproof foundation and fixing the waterproof sheet to the waterproof foundation using a sheet fixing tool, which includes a drilling step of drilling holes in the surface layer to expose the waterproof foundation and a base member capable of connecting and fixing the sheet fixing tool The base member is attached to the base member without applying any adhesive thereto. an inserting step of inserting the base member into the hole; The above The method also includes a filling step of filling the adhesive, and a connecting step of connecting and fixing the sheet fixing tool to the base member from above the surface layer.

[0007] According to the present invention, when a hole is drilled in the surface layer, the hole is filled with adhesive, and a base member is inserted into the hole. Generally, the waterproof base is made of concrete, stainless steel plate, etc., so in a configuration in which the base member is bolted to the waterproof base, it is necessary to drill bolt holes for bolt fixing in the waterproof base, which is accompanied by noise and vibration, and dust scattering. According to the present invention, the waterproof base is not drilled, and holes are drilled only in the surface layer laid directly above the waterproof base, so it is superior in terms of soundproofing, vibration proofing, and dust proofing compared to a method in which bolt holes for bolt fixing are drilled in the waterproof base. In addition, since the adhesive is filled in the hole, the adhesive acts to adhere to the waterproof base, the surface layer located on the outer periphery of the hole, and the base member inserted in the hole. Therefore, compared to a configuration in which the adhesive acts to adhere only to the waterproof base and the base member, the stress caused by the swelling of the waterproof sheet due to wind is dispersed, and the support structure of the base member for the waterproof base is strengthened. In addition, in the present invention, compared to a configuration in which the adhesive acts only on the waterproof substrate and the base member, the stress acting on the adhesive is dispersed, so that the adhesive is less likely to crack even after it hardens, and the durability of the adhesive is also increased. This realizes a waterproof sheet fixing method that can firmly support the sheet fixing device on the waterproof substrate in a simple manner while taking into consideration soundproofing, vibration prevention, dustproofing, etc.

[0008] As one preferred embodiment of the present invention, in the inserting step, it is preferred that the base member is inserted until it touches the waterproof foundation.

[0009] With this configuration, the base member is less likely to shift position compared to when the base member is not in contact with the waterproof foundation. Therefore, even before the adhesive hardens, the worker can easily connect and fix the sheet fastener to the base member while pressing the base member against the waterproof foundation.

[0010] In the present invention, it is preferable that the connecting step is performed after the adhesive filled in the hole is cured.

[0011] With this configuration, the base member is firmly supported and fixed by the hardened adhesive, and an operator can easily connect and fix the sheet fixing device to the base member. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a partially cutaway perspective view showing a roof to be waterproofed. [Diagram 2] FIG. 2 is a cross-sectional view showing the waterproof sheet laid down. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 11 is a cross-sectional view of another embodiment showing a waterproof sheet laid down. [Figure 8] FIG. 11 is a cross-sectional view of another embodiment showing a waterproof sheet laid down. [Figure 9] FIG. 11 is a cross-sectional view of another embodiment showing a waterproof sheet laid down. [Figure 10] FIG. 11 is a cross-sectional view of another embodiment showing a waterproof sheet laid down. [Figure 11] FIG. 11 is a cross-sectional view of another embodiment showing a waterproof sheet laid down. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The method for installing the sheet fastener of the present invention will now be described.

[0014] [About the waterproof sheet fixing structure] As shown in Figures 1 and 2, an existing insulation material 2 is laid directly on a waterproof base 1, which is a flat roof such as a deck plate or a folded plate roof, and an existing waterproof sheet 3 is laid on the existing insulation material 2. The existing insulation material 2 and the existing waterproof sheet 3 are the "surface layer" of the present invention. Furthermore, a waterproof sheet 4 for renovation is laid on the surface layer including the existing insulation material 2 and the existing waterproof sheet 3. The existing insulation material 2 is, for example, a urethane foam material, and has appropriate strength and insulating properties. The existing insulation material 2 is the "insulation material" of the present invention. The existing waterproof sheet 3 and the waterproof sheet for renovation 4 are, for example, made of polyvinyl chloride resin, and are flexible. The waterproof performance of the existing waterproof sheet 3 has deteriorated due to the effects of ultraviolet rays, etc., and the waterproof sheet for renovation 4 is newer than the existing waterproof sheet 3.

[0015] The existing waterproof sheet 3 is fixed to the waterproof base 1 by an existing sheet fixing device 5. Since this is a known technique, detailed explanation will be omitted, but bolt holes for fixing the existing sheet fixing device 5 are drilled in the waterproof base 1, and the existing sheet fixing device 5 is fastened to the bolt hole of the waterproof base 1 in a state in which it penetrates the existing insulation material 2 from top to bottom.

[0016] The upper surface of the existing sheet fastener 5 is made of a conductive material such as metal. The upper surface of the existing sheet fastener 5 is formed in a substantially disc shape, and the existing waterproof sheet 3 and the upper surface of the existing sheet fastener 5 are bonded by heat fusion. That is, when installing the existing waterproof sheet 3, a worker presses an induction heating device (not shown) against the upper surface of the existing sheet fastener 5 from above the existing waterproof sheet 3 to heat the upper surface, and fuses the existing waterproof sheet 3 to the upper surface of the existing sheet fastener 5.

[0017] The sheet fixing mechanism 6 has a sheet fixing tool 61 and a base member 62. The renovation waterproof sheet 4 to be laid on the existing thermal insulation material 2 is fixed to the waterproof base 1 by the sheet fixing tool 61 and the base member 62.

[0018] In order to fix the renovation waterproof sheet 4 to the waterproof base 1, a plurality of cylindrical holes 2h are drilled at predetermined intervals in the existing heat insulating material 2 and the existing waterproof sheet 3. The holes 2h are spaced approximately a predetermined distance from the existing sheet fixing device 5. The holes 2h are drilled across the vertical widths of the existing heat insulating material 2 and the existing waterproof sheet 3, and a base member 62 is inserted into each of these holes 2h.

[0019] The sheet fixing device 61 is made of a conductive material such as metal. The sheet fixing device 61 is formed in a substantially disk-like shape, and a through hole 61h is formed in the central region of the substantially disk-like shape. A screw receiving portion 62A and a flange portion 62B are formed in the base member 62. The flange portion 62B is formed in the lower portion of the base member 62, and the screw receiving portion 62A rises upward from the flange portion 62B. The upper end portion of the screw receiving portion 62A is located below the upper surface portion of the existing waterproof sheet 3, but is located at a height close to the upper surface portion of the existing waterproof sheet 3. In other words, the vertical height of the screw receiving portion 62A is configured to be approximately the same height as the vertical width of the existing insulation material 2, or a height slightly smaller than the vertical width of the existing insulation material 2.

[0020] The screw receiving portion 62A is formed in a cylindrical shape extending in the vertical direction, and a screw hole 62h extending in the vertical direction is drilled in the radial center of the screw receiving portion 62A. The bolt 7 is passed through the through hole 61h and the head of the bolt 7 is engaged around the through hole 61h, and the threaded portion of the bolt 7 is screwed into the screw hole 62h of the screw receiving portion 62A, thereby fastening the seat fixing device 61 and the base member 62.

[0021] Each of the holes 2h is filled with adhesive 8 and hardened, and the lower part of the base member 62 is buried in the adhesive 8. The lower surface of the flange portion 62B comes into contact with the upper surface of the waterproof base 1. The lower surface of the flange portion 62B does not have to come into contact with the upper surface of the waterproof base 1, and the hardened adhesive 8 may be interposed between the lower surface of the flange portion 62B and the upper surface of the waterproof base 1. In short, it is sufficient that the flange portion 62B is configured to be present in the hardened adhesive 8. The adhesive 8 is made of, for example, an acrylic resin, an epoxy resin, a synthetic rubber, or the like.

[0022] The sheet fixing tool 61 and the waterproof sheet for renovation 4 are bonded by heat fusion. That is, a worker presses an induction heating device (not shown) against the sheet fixing tool 61 from above the waterproof sheet for renovation 4 to heat the sheet fixing tool 61, and fuses the waterproof sheet for renovation 4 to the sheet fixing tool 61. As a result, the waterproof sheet for renovation 4 is fixed to the waterproof base 1 via the sheet fixing mechanism 6 (the sheet fixing tool 61 and the base member 62).

[0023] [How to fasten the waterproof sheet] The method of fixing the renovation waterproof sheet 4 will be described below. (1.Drilling process) First, as shown in FIG. 3, the worker drills holes 2h at the construction site where the sheet fixing tool 61 and the base member 62 are installed, across the top and bottom of the existing insulation material 2 and the existing waterproof sheet 3 so that the waterproof base 1 is exposed. This process is the "drilling process" of the present invention. In the drilling process, the worker drills cylindrical holes 2h at locations of the existing insulation material 2 and the existing waterproof sheet 3 that are approximately a predetermined distance away from the location where the existing sheet fixing tool 5 is located, using a hole punching tool such as a core drill. The diameter of the hole 2h is smaller than the outer diameter of the sheet fixing tool 61. The vertical height of the hole 2h extends to the thickness of the existing insulation material 2 and the thickness of the existing waterproof sheet 3. Therefore, the upper surface of the waterproof base 1 is exposed at the bottom of the hole 2h. In this way, the process of drilling holes 2h in the existing insulation material 2 and the existing waterproof sheet 3, which are the surface layers, to expose the waterproof base 1 is the drilling process.

[0024] (2. Filling process) When the drilling step is completed, the worker fills the hole 2h with liquid adhesive 8, as shown in Fig. 4. This step is the "filling step" of the present invention. The adhesive 8 is filled up to the upper region of the hole 2h. It is preferable that the adhesive 8 is filled up to the upper side of the upper and lower middle regions of the hole 2h.

[0025] (3. Insertion process) When the filling step is completed, as shown in FIG. 5, the worker inserts the base member 62 capable of connecting and fixing the sheet fixing device 61 into the hole portion 2h before the adhesive 8 filled in the hole portion 2h hardens. This step is the "insertion step" of the present invention. At the time of the insertion step, the sheet fixing device 61 and the base member 62 are separated. In the insertion step, the entire flange portion 62B is immersed in the adhesive 8. In the insertion step, the worker inserts the base member 62 until it is grounded on the waterproof base 1, but the base member 62 and the waterproof base 1 do not have to be grounded. The upper end of the screw receiving portion 62A is located above the liquid level of the adhesive 8. The upper end of the screw receiving portion 62A and the liquid level of the adhesive 8 may be approximately the same height.

[0026] (4.Connection process) When the insertion step is completed and the adhesive 8 filled in the hole 2h is cured, as shown in FIG. 6, the worker connects and fixes the sheet fixing tool 61 to the base member 62 from above the existing insulation material 2 and the existing waterproof sheet 3, which are the surface layers. This step is the "connecting step" of the present invention. That is, the worker inserts the bolt 7 into the through hole 61h of the sheet fixing tool 61, and inserts the threaded portion of the bolt 7 into the screw hole 62h and screws it. This attaches the sheet fixing tool 61 to the screw receiving portion 62A of the base member 62. Since the outer diameter of the sheet fixing tool 61 is larger than the diameter of the hole 2h, the sheet fixing tool 61 covers the hole 2h from above. Therefore, the outer periphery of the sheet fixing tool 61 presses the area around the hole 2h in the existing insulation material 2 from above. The worker can adjust the screwing depth of the bolt 7 into the screw hole 62h according to the pressing force of the sheet fixing tool 61 against the existing insulation material 2.

[0027] After the above-mentioned drilling process to connecting process are performed for all the holes 2h, the worker lays the waterproof sheet for renovation 4 on the existing waterproof sheet 3 (see Figs. 1 and 2). Then, the worker presses an induction heating device (not shown) from above the waterproof sheet for renovation 4 against each of the positions where the sheet fixing tools 61 are located to heat the sheet fixing tools 61. When the sheet fixing tools 61 are heated to a predetermined temperature, the temperature of the part of the waterproof sheet for renovation 4 that contacts the sheet fixing tool 61 reaches the melting point, and the part of the waterproof sheet for renovation 4 that contacts the sheet fixing tool 61 is fused to the sheet fixing tool 61. As a result, the waterproof sheet for renovation 4 and the sheet fixing tool 61 are bonded to each other, and the waterproof sheet for renovation 4 is fixed to the waterproof base 1 via the sheet fixing tool 61 and the base member 62. When the waterproof sheet for renovation 4 is bonded to all the sheet fixing tools 61 by heat fusion, the laying work of the waterproof sheet for renovation 4 is completed.

[0028] After hardening, the adhesive 8 firmly adheres to the waterproof base 1, the existing insulation material 2, and the base member 62. In other words, when the sheet fixing device 61 and the base member 62 are fastened, the existing sheet fixing device 5 firmly supports the waterproof sheet 4 for renovation. If fine irregularities are formed on the upper surface of the waterproof base 1, the adhesive 8 penetrates into the irregularities of the upper surface of the waterproof base 1 below at the hole 2h, so that the base member 62 is supported even more firmly by the waterproof base 1. Also, if fine irregularities are formed on the peripheral surface of the hole 2h in the existing insulation material 2, the adhesive 8 penetrates into the irregularities of the peripheral surface of the existing insulation material 2 on the side at the hole 2h, so that the base member 62 is supported even more firmly by the existing insulation material 2.

[0029] The upper end of the screw receiving portion 62A is located lower than the upper surface portion of the existing waterproof sheet 3, but is located at a height close to the upper surface portion of the existing waterproof sheet 3. The adhesive 8 is also filled up to the area near the upper end of the screw receiving portion 62A. Therefore, the screw receiving portion 62A is firmly held in position by the hardened adhesive 8, and the sheet fastener 61 is firmly held in position by the screw receiving portion 62A. The adhesive 8 may also be configured to be filled up to the central area above and below the screw receiving portion 62A.

[0030] [Another embodiment] The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be described below.

[0031] (1) In the above embodiment, the waterproof sheet for renovation 4 is laid on the sheet fixing tool 61, but the present invention is not limited to this embodiment. For example, as shown in FIG. 7, the waterproof sheet for renovation 4 may be located below the sheet fixing tool 61, and the sheet fixing tool 61 and the waterproof sheet for renovation 4 around the sheet fixing tool 61 in a plan view may be covered with the extension sheet 9 from above. In this case, there is a laying process of laying the waterproof sheet for renovation 4 on the existing waterproof sheet 3 before the drilling process. In the drilling process, the hole portion 2h is drilled integrally in the waterproof sheet for renovation 4, the existing waterproof sheet 3, and the existing thermal insulation material 2. Then, the above-mentioned filling process and the insertion process are respectively performed, and in the connecting process, the sheet fixing tool 61 is attached to the base member 62 so that the sheet fixing tool 61 is located above the waterproof sheet for renovation 4. The extension sheet 9 is bonded to the sheet fixing tool 61 and the waterproof sheet for renovation 4 by, for example, a sheet adhesive.

[0032] (2) In the above embodiment, only the waterproof sheet for renovation 4 is laid on the existing waterproof sheet 3, but the present invention is not limited to this embodiment. For example, as shown in FIG. 8, the additional insulation material 10 may be laid on the existing waterproof sheet 3, and the waterproof sheet for renovation 4 may be laid on the additional insulation material 10. In this case, there is a laying process of laying the additional insulation material 10 on the existing waterproof sheet 3 before the drilling process. In addition, in the drilling process, the additional insulation material 10, the existing waterproof sheet 3, and the existing insulation material 2 are integrally drilled with the hole portion 2h. Then, by the above-mentioned filling process, inserting process, and connecting process, the base member 62 is installed in the hole portion 2h filled with the adhesive 8, the waterproof sheet for renovation 4 is laid above the sheet fixing tool 61, and the waterproof sheet for renovation 4 and the sheet fixing tool 61 are bonded by heat fusion.

[0033] Also, as shown in FIG. 9, the waterproof sheet for renovation 4 may be located below the sheet fixing tool 61, and the extension sheet 9 may cover the sheet fixing tool 61 and the waterproof sheet for renovation 4 around the sheet fixing tool 61 in a plan view from above. In this case, there is a laying process in which the additional insulation material 10 and the waterproof sheet for renovation 4 are laid together on the existing waterproof sheet 3 before the drilling process. In the drilling process, the holes 2h are drilled integrally in the waterproof sheet for renovation 4, the additional insulation material 10, the existing waterproof sheet 3, and the existing insulation material 2. Then, the above-mentioned filling process and insertion process are performed, and in the connecting process, the sheet fixing tool 61 is attached to the base member 62 so that the sheet fixing tool 61 is located above the waterproof sheet for renovation 4. The extension sheet 9 is bonded to the sheet fixing tool 61 and the waterproof sheet for renovation 4 by, for example, a sheet adhesive.

[0034] (3) In the above embodiment, the waterproof sheet 4 for renovation is laid, but the present invention is not limited to this embodiment. For example, as shown in Fig. 10, the sheet fastener installation method according to the present invention can be applied when laying a new waterproof sheet 13 on a new waterproof base 11. Explaining based on Fig. 10, in the drilling step, a hole 12h is drilled in the new insulation material 12. Then, through the above-mentioned filling process, insertion process, and connection process, the base member 62 is installed in the hole 12h filled with the adhesive 8, the waterproof sheet 13 is laid above the sheet fixing device 61, and the waterproof sheet 13 and the sheet fixing device 61 are bonded together by heat fusion.

[0035] Also, as shown in FIG. 11, the waterproof sheet 13 may be located below the sheet fixing tool 61, and the tension sheet 9 may cover the sheet fixing tool 61 and the waterproof sheet 13 around the sheet fixing tool 61 in a plan view from above. In this case, a laying step of laying the waterproof sheet 13 on the newly installed insulation material 12 is performed before the drilling step. In the drilling step, holes 12h are drilled integrally in the newly installed insulation material 12 and the waterproof sheet 13. Then, the above-mentioned filling step and insertion step are performed, and in the connecting step, the sheet fixing tool 61 is attached to the base member 62 so that the sheet fixing tool 61 is located above the waterproof sheet 13. The tension sheet 9 is bonded to the sheet fixing tool 61 and the waterproof sheet 13 by, for example, a sheet adhesive.

[0036] (4) The adhesive 8 may be a caulking agent.

[0037] (5) In the above embodiment, the connecting step is performed after the adhesive 8 filled in the hole 2h has hardened, but the connecting step may be performed before the adhesive 8 has hardened. Also, in the above embodiment, the upper end of the screw receiving portion 62A is located above the liquid level of the adhesive 8, but the entire screw receiving portion 62A may be located below the liquid level of the adhesive 8 and the connecting step may be performed before the adhesive 8 has hardened.

[0038] (6) In the above embodiment, the base member 62 is provided with one flange portion 62B, but a plurality of flange portions 62B may be provided, or a configuration in which the flange portion 62B is not provided may also be used.

[0039] (7) In the above embodiment, the inserting step is performed after the filling step, but the filling step may be performed after the inserting step. In other words, the inserting step may be a step of inserting the base member 62 capable of connecting and fixing the sheet fastener 61 into the hole 2h, and the filling step may be a step of filling the adhesive 8 into the hole 2h into which the base member 62 has been inserted.

[0040] (8) In the above embodiment, the connecting step is performed after the inserting step, but for example, the connecting step may be performed before the inserting step. For example, the sheet fixing device 61 and the base member 62 may be connected in advance, and the base member 62 connected to the sheet fixing device 61 may be inserted into the hole 2h after the filling step.

[0041] The configurations disclosed in the above-described embodiment (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction occurs. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments, and can be modified as appropriate without departing from the scope of the present invention. [Industrial Applicability]

[0042] The present invention can be applied to a waterproof sheet fixing method for fixing a waterproof sheet to a waterproof base. [Explanation of symbols]

[0043] 1: Waterproof base 2: Existing insulation material (insulation material, surface layer) 2h: Hole 3: Existing waterproof sheet (surface layer) 4: Waterproof sheet for renovation (waterproof sheet) 8: Adhesive 10: Additional insulation (insulation, surface layer) 11: Waterproof base 12: New insulation (insulation, surface layer) 12h: Hole 13: Waterproof sheet 61: Seat fixing device 62: Base material

Claims

1. A waterproof sheet fixing method in which a waterproof sheet is laid on a surface layer including a thermal insulating material laid directly on a waterproof substrate, and the waterproof sheet is fixed to the waterproof substrate using a sheet fixing device, A drilling step of drilling holes in the surface layer to expose the waterproof base; a filling step of filling the hole with adhesive; an insertion step of inserting a base member into the hole, the base member being capable of connecting and fixing the sheet fixing device, before the adhesive filled in the hole hardens; A waterproof sheet fixing method including a connecting step of connecting and fixing the sheet fixing device to the base member from above the surface layer.

2. A waterproof sheet fixing method in which a waterproof sheet is laid on a surface layer including a thermal insulating material laid directly on a waterproof substrate, and the waterproof sheet is fixed to the waterproof substrate using a sheet fixing device, A drilling step of drilling holes in the surface layer to expose the waterproof base; an insertion step of inserting a base member to which the sheet fastener can be connected and fixed into the hole without applying adhesive to the base member; a filling step of filling the adhesive into the hole into which the base member is inserted; A waterproof sheet fixing method including a connecting step of connecting and fixing the sheet fixing device to the base member from above the surface layer.

3. 3. The waterproof sheet fixing method according to claim 1, wherein in the inserting step, the base member is inserted until it touches the waterproof substrate.

4. The waterproof sheet fixing method according to claim 1 , wherein the connecting step is carried out after the adhesive filled in the hole portion has hardened.

5. A method for fixing a waterproof sheet described in any one of claims 1 to 4, wherein the adhesive is composed of at least one of an acrylic resin system, an epoxy resin system, and a synthetic rubber system.

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