JP2022101862A - Ventilation structure and waterproof construction method using ventilation structure - Google Patents

Abstract

To provide a ventilation structure capable of ventilating gas such as water vapor generated from a roof in a plane direction of a waterproof sheet, and a waterproof construction method having a step of arranging the ventilation structure.SOLUTION: A ventilation structure 1 that is placed on the roof side of the tarpaulin has a rubber layer 10 and a woven cloth 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ventilation structure arranged on the roof side surface of the waterproof sheet in the case of a waterproof construction method using the waterproof sheet.

As waterproofing methods for rooftops of buildings, there are sheet waterproofing methods that attach a waterproof sheet to the roof to form a waterproof structure, and coating waterproofing methods that apply waterproof paint to the roof to form a waterproof structure. be.

Above all, the sheet waterproofing method has an advantage that the construction is simpler than other waterproofing methods such as the coating film waterproofing method. In the sheet waterproofing method, an adhesive such as chloroprene rubber is applied to the roof portion of a building, the adhesive is dried, and then the waterproof sheet is attached to the roof portion to form a waterproof structure (for example, Patent Document 1). And 2). Further, in the sheet waterproofing method, a waterproof structure may be constructed by arranging a waterproof sheet on the roof portion of a building and fixing the waterproof sheet with a fixture (see, for example, Patent Document 3).

Japanese Unexamined Patent Publication No. 2004-270148 Japanese Unexamined Patent Publication No. 2005-146633 Japanese Unexamined Patent Publication No. 2001-241118

Gas such as water vapor may be generated from the roof of the building after the waterproofing method is applied. For example, the base concrete laid on the roof of a building is exposed to a drastic temperature change of about 60 ° C in summer and about -20 ° C in winter. Therefore, when the temperature rises, a large amount of gas such as water vapor contained in concrete is released to the outside.

In a waterproof structure as in Patent Documents 1 to 3, gas such as water vapor generated from the roof portion cannot be released to the outside, and the waterproof sheet may swell or the waterproof sheet may break. There was a problem.

The present invention has been made in view of the above problems, and an object thereof is to arrange a ventilation structure and a ventilation structure capable of ventilating a gas such as water vapor generated from a roof portion in a plane direction of a waterproof sheet. The purpose is to provide a waterproof construction method having a step of performing.

The ventilation structure of the present invention that has been able to solve the above problems is a ventilation structure arranged on the roof side surface of the waterproof sheet, and is characterized by having a rubber layer and a woven cloth. It is something to do.

In the ventilation structure of the present invention, the threads constituting the woven fabric include a first thread and a second thread, and the first thread is preferably thicker than the second thread.

In the ventilation structure of the present invention, it is preferable that at least one of the warp and weft constituting the woven fabric contains a pull-aligned yarn in which a plurality of yarns are aligned in parallel.

In the ventilation structure of the present invention, the woven fabric has a plurality of draw-aligned yarns and a plurality of single yarns, and the distance between the draw-aligned yarns and the drawn-aligned yarns adjacent to the drawn-aligned yarns is set. It is preferably larger than the distance between the single yarn and the single yarn adjacent to the single yarn.

In the ventilation structure of the present invention, the number of yarns constituting the drawn yarn is preferably 5 or more and 50 or less.

In the ventilation structure of the present invention, the rubber layer preferably contains butyl rubber.

In the ventilation structure of the present invention, the roof side protective sheet is provided on the roof surface side, the waterproof sheet side protective sheet is provided on the waterproof sheet side, and the rigidity of the roof side protective sheet is the rigidity of the waterproof sheet side protective sheet. It is preferably higher than.

In the ventilation structure of the present invention, the material constituting the roof side protective sheet is preferably paper, and the material constituting the waterproof sheet side protective sheet is preferably a synthetic resin film.

The waterproofing method of the present invention that has been able to solve the above problems is a waterproofing method using the ventilation structure of the present invention and the waterproof sheet, and the roof side protective sheet of at least a part of the ventilation structure is used. The steps of peeling off, arranging the ventilation structure on the roof, arranging the waterproof sheet on the ventilation structure, and peeling off the waterproof sheet side protective sheet of the ventilation structure are sequentially performed. It is a feature.

Since the ventilation structure of the present invention has a rubber layer and a woven cloth, a space for ventilation can be provided on the roof side surface of the waterproof sheet, and a gas such as water vapor generated from the roof portion can be provided. Can be ventilated in the plane direction of the waterproof sheet. Further, in the waterproof construction method of the present invention, by using a ventilation structure, a ventilation space is provided on the roof side surface of the waterproof sheet to allow gas generated from the roof portion to be ventilated in the plane direction of the waterproof sheet, and further, the ventilation structure. The process of peeling off the roof side protective sheet of at least a part of the body, the process of arranging the ventilation structure on the roof, the process of arranging the waterproof sheet on the ventilation structure, and the process of arranging the waterproof sheet side protective sheet of the ventilation structure. By sequentially performing the steps of peeling off the roof, it is possible to make it easy to attach the waterproof sheet to the intended position neatly.

The top view of the ventilation structure in embodiment of this invention is shown. The II-II sectional view of the ventilation structure shown in FIG. 1 is shown.

Hereinafter, the waterproof structure according to the present invention will be specifically described with reference to the drawings. Modifications can also be made and they are all within the technical scope of the invention.

In a waterproofing method for forming a waterproof structure on a roof portion of a building such as a roof using a waterproof sheet, the ventilation structure of the present invention is arranged on the roof side surface of the waterproof sheet and is located between the waterproof sheet and the roof portion. Form a space for ventilation. That is, by arranging the ventilation structure on the roof side surface of the waterproof sheet, it is possible to ventilate the gas such as water vapor released from the roof portion of the building in the plane direction of the waterproof sheet.

FIG. 1 shows a top view of the ventilation structure 1 according to the present invention as viewed from above, and FIG. 2 shows a cross-sectional view of the ventilation structure 1. As shown in FIGS. 1 and 2, the ventilation structure 1 according to the embodiment of the present invention has a rubber layer 10 and a woven fabric 20. Since the ventilation structure 1 has the rubber layer 10 and the woven fabric 20, the rubber layer 10 protects the woven fabric 20 and the woven fabric 20 is a gas in a state where the ventilation structure 1 is arranged on the roof. As a flow passage, the gas released from the roof portion between the waterproof sheet and the roof portion can pass in the plane direction of the waterproof sheet. Although not shown, by providing the waterproof structure with a de-cylinder, it is possible to allow the gas released from the roof portion to pass in the plane direction of the waterproof sheet and to be discharged to the outside through the de-cylinder. Therefore, even if a gas such as water vapor is released from the roof portion, the waterproof sheet is less likely to swell or break. In FIG. 2, the upper side of the drawing is the side on which the waterproof sheet is arranged, and the lower side of the drawing is the roof side.

The waterproof sheet is a sheet-like material used to impart waterproofness to the roof portion of a building. Examples of the material constituting the waterproof sheet include synthetic rubber such as ethylene propylene diene rubber (EPDM) and urethane rubber (U), and synthetic resin such as vinyl chloride.

As shown in FIGS. 1 and 2, the rubber layer 10 may be arranged on the roof side of the woven fabric 20, but is preferably arranged on the waterproof sheet side. Since the rubber layer 10 is arranged closer to the waterproof sheet than the woven fabric 20, the ventilation structure 1 can easily follow the waterproof sheet, and the area where the ventilation structure 1 and the waterproof sheet contact can be increased, so that ventilation can be achieved. The structure 1 and the waterproof sheet can be sufficiently fixed.

Examples of the material constituting the rubber layer 10 include polyisobutylene-based rubber, chloroprene-based rubber, and fluorine-based rubber. Above all, the rubber layer 10 preferably contains butyl rubber (isobutylene / isoprene copolymer). Further, the material constituting the rubber layer 10 is more preferably butyl rubber. Since the rubber layer 10 contains butyl rubber, the rubber layer 10 is given appropriate flexibility, and when the ventilation structure 1 is arranged on the roof side surface of the waterproof sheet, the ventilation structure 1 is the surface of the roof portion of the building. It will be easier to arrange along the roof.

The rubber layer 10 included in the ventilation structure 1 may be one or a plurality of rubber layers 10 in the thickness direction of the ventilation structure 1, but may be present in the width direction and the length direction of the ventilation structure 1. It is preferable that there are a plurality of them on at least one of them. That is, it is preferable that a plurality of rubber layers 10 are arranged in at least one of the width direction and the length direction of the ventilation structure 1. By having a plurality of rubber layers 10 in at least one of the width direction and the length direction of the ventilation structure 1, the ventilation structure 1 is easily bent in the width direction and the length direction, and the ventilation structure 1 is arranged on the roof. It is easy to do, and the ventilation structure 1 is easy to adhere to the roof.

Examples of the type of woven fabric 20 include woven fabrics such as plain weave, twill weave, and satin weave. Above all, the woven fabric 20 is preferably a plain weave. Since the woven fabric 20 is a plain weave, the woven fabric 20 becomes durable. For example, the ventilation structure 1 is kept wrapped in a roll, and the ventilation structure 1 is pulled on the roof portion while pulling the roll-shaped ventilation structure 1. Even when 1 is arranged, excessive stretching or breakage of the woven fabric 20 is unlikely to occur, and the workability of the process of arranging the ventilation structure 1 can be improved.

Examples of the fibers constituting the woven fabric 20 include synthetic fibers such as polyester, polyethylene, polyurethane and nylon, natural fibers such as cotton and linen, and glass fibers. Among them, the fibers constituting the woven fabric 20 are preferably synthetic fibers, more preferably polyester. Since the fibers constituting the woven fabric 20 are synthetic fibers, it is possible to increase the strength and durability of the woven fabric 20.

As shown in FIGS. 1 and 2, the threads constituting the woven fabric 20 include a first thread 21 and a second thread 22, and the first thread 21 is thicker than the second thread 22. Is preferable. Since the woven fabric 20 contains the second thread 22 and the first thread 21 which is thicker than the second thread 22, the breathability of the portion where the first thread 21 which is a thick thread is arranged is improved. It can be enhanced and the ventilation performance of the ventilation structure 1 can be improved.

The thickness of the first thread 21 is preferably thicker than the thickness of the second thread 22, and when the thicknesses of the first thread 21 and the second thread 22 are represented by counts, the first thread 21 The count is preferably smaller than the count of the second thread 22. The specific thicknesses of the first thread 21 and the second thread 22 are as follows. The count of the first yarn 21 is preferably 3 or more, more preferably 5 or more, and even more preferably 8 or more. The count of the second thread 22 is preferably 40 or more, more preferably 45 or more, and even more preferably 50 or more. By setting the lower limit of the counts of the first thread 21 and the second thread 22 in the above range, the first thread 21 and the second thread 22 of the woven fabric 20 become excessively thick. This prevents the ventilation structure 1 from becoming heavier and the ventilation structure 1 from becoming too rigid to roll the ventilation structure 1 into a roll shape. It will be easy to handle. The count of the first yarn 21 is preferably 30 or less, more preferably 25 or less, and even more preferably 20 or less. The count of the second thread 22 is preferably 80 counts or less, more preferably 75 counts or less, and further preferably 70 counts or less. By setting the upper limit of the counts of the first thread 21 and the second thread 22 in the above range, the strength of the woven fabric 20 can be increased, and the ventilation space of the ventilation structure 1 by the woven fabric 20 can be further increased. It can be secured sufficiently.

As shown in FIGS. 1 and 2, at least one of the warp and weft constituting the woven fabric 20 preferably contains a pulling yarn 40 in which a plurality of yarns are aligned in parallel. Since the woven fabric 20 includes the pull-aligned yarn 40, the air permeability of the portion of the drawn-aligned yarn 40 is enhanced, and the ventilation performance of the ventilation structure 1 can be improved.

As shown in FIG. 1, the woven fabric 20 has a plurality of draw-aligned yarns 40 and a plurality of single yarns 50, and the draw-alignment yarns 40 and the draw-alignment yarns 40 adjacent to the draw-alignment yarns 40. It is preferable that the distance D1 between the single yarn 50 and the single yarn 50 is larger than the distance D2 between the single yarn 50 and the adjacent single yarn 50. In the woven fabric 20, the distance D1 between the two adjacent draw-aligned yarns 40 is larger than the distance D2 between the two adjacent single yarns 50, so that the quantity of the draw-alignment yarns 40 possessed by the woven fabric 20 is appropriate. Therefore, the flexibility of the ventilation structure 1 can be maintained while ensuring the ventilation performance of the ventilation structure 1.

The distance D1 between the pull-aligned yarn 40 and the drawn-aligned yarn 40 adjacent to the drawn-aligned yarn 40 is preferably 10 times or more the distance D2 between the single yarn 50 and the adjacent single yarn 50. , 15 times or more is preferable, and 20 times or more is more preferable. By setting the lower limit of the ratio between the distance D1 between the two adjacent pulling yarns 40 and the distance D2 between the two adjacent single yarns 50 within the above range, the ratio of the pulling yarns 40 in the woven fabric 20 is appropriate. The workability can be improved in the process of arranging the ventilation structure 1 by making the ventilation structure 1 flexible. Further, the distance D1 between the pull-aligned yarn 40 and the drawn-aligned yarn 40 adjacent to the drawn-aligned yarn 40 is 50 times or less the distance D2 between the single yarn 50 and the adjacent single yarn 50. Is preferable, 45 times or less is more preferable, and 40 times or less is further preferable. By setting the upper limit of the ratio between the distance D1 between the two adjacent pull-aligned yarns 40 and the distance D2 between the two adjacent single yarns 50 within the above range, the draw-alignment yarn 40 is sufficiently provided to the ventilation structure 1. It can be provided, and the ventilation performance of the ventilation structure 1 can be ensured.

The thickness of the yarn constituting the pull-aligned yarn 40 is preferably thicker than the thickness of the single yarn 50. Since the thickness of the threads constituting the draw-aligned thread 40 is thicker than the thickness of the single thread 50, the air permeability of the portion of the draw-aligned thread 40 can be improved, and the ventilation performance of the ventilation structure 1 can be improved. Can be done.

When the thicknesses of the yarns constituting the draw-aligned yarn 40 and the single yarn 50 are represented by counts, it is preferable that the counts of the yarns constituting the draw-aligned yarn 40 are smaller than the counts of the single yarn 50. Specifically, the yarn counts constituting the draw-aligned yarn 40 are preferably 3rd or higher, more preferably 5th or higher, and even more preferably 8th or higher. The count of the single yarn 50 is preferably 40 or higher, more preferably 45 or higher, and even more preferably 50 or higher. By setting the lower limit values of the yarn counts constituting the draw-aligned yarn 40 and the counts of the single yarn 50 within the above range, the yarns such as the draw-aligned yarn 40 and the single yarn 50 constituting the woven fabric 20 become thicker. It is prevented from becoming too much, the weight of the ventilation structure 1 becomes heavier due to the increase in the weight of the woven fabric 20, and the rigidity of the ventilation structure 1 becomes excessively increased due to the increase in the rigidity of the woven fabric 20. It is possible to prevent the body 1 from becoming difficult to roll and to make the ventilation structure 1 easy to handle. Further, the yarn counts constituting the pull-aligned yarn 40 are preferably 30 counts or less, more preferably 25 counts or less, and further preferably 20 counts or less. The count of the single yarn 50 is preferably 80 counts or less, more preferably 75 counts or less, and further preferably 70 counts or less. By setting the upper limit of the counts of the yarns constituting the draw-aligned yarn 40 and the single yarn 50 in the above range, the strength of the woven fabric 20 is increased, and the woven fabric 20 has breathability, so that the ventilation structure is formed. It is possible to improve the ventilation performance of 1.

The number of yarns constituting the draw-aligned yarn 40 is preferably 5 or more and 50 or less. Since the draw-aligned yarn 40 is composed of 5 or more and 50 or less yarns, a sufficient ventilation space can be provided in the portion of the draw-aligned yarn 40 of the woven fabric 20, and the ventilation of the ventilation structure 1 can be improved. Can be enhanced.

The number of yarns constituting the draw-aligned yarn 40 is preferably 5 or more, more preferably 10 or more, and further preferably 15 or more. By setting the lower limit of the number of yarns constituting the draw-aligned yarn 40 within the above range, the air permeability of the portion of the draw-aligned yarn 40 can be made sufficient. Further, the number of yarns constituting the draw-aligned yarn 40 is preferably 50 or less, more preferably 45 or less, and further preferably 40 or less. By setting the upper limit of the number of yarns constituting the draw-aligned yarn 40 within the above range, the ratio of the draw-aligned yarn 40 in the woven fabric 20 becomes appropriate, and the flexibility of the ventilation structure 1 can be maintained. It will be possible.

As shown in FIGS. 1 and 2, the ventilation structure 1 has a roof side protective sheet 31 on the roof side, a waterproof sheet side protective sheet 32 on the waterproof sheet side, and the roof side protective sheet 31. The rigidity is preferably higher than the rigidity of the waterproof sheet side protective sheet 32. Since the ventilation structure 1 has the roof side protective sheet 31 and the waterproof sheet side protective sheet 32, the roof side surface and the waterproof sheet side surface can be protected until the ventilation structure 1 is used, and the rubber layer 10 can be protected. And the woven cloth 20 and the like can be made hard to be damaged. Further, since the rigidity of the roof side protective sheet 31 is higher than the rigidity of the waterproof sheet side protective sheet 32, when the ventilation structure 1 is arranged, the roof side surface is more easily damaged than the waterproof sheet side surface because it is in contact with the roof portion. Can be strongly protected. Further, by arranging the protective sheet having higher rigidity than the other side surface on one side surface of the ventilation structure 1, the rigidity of the entire ventilation structure 1 is appropriately increased, and when the ventilation structure 1 is arranged. The ventilation structure 1 is easy to handle and can improve workability.

In order to make the rigidity of the roof side protective sheet 31 higher than the rigidity of the waterproof sheet side protective sheet 32, for example, the material constituting the roof side protective sheet 31 is higher in rigidity than the material constituting the waterproof sheet side protective sheet 32. The roof side protective sheet 31 may be thicker than the waterproof sheet side protective sheet 32, and only the waterproof sheet side protective sheet 32 may have holes or slits.

Above all, it is preferable that the material constituting the roof side protective sheet 31 is paper, and the material constituting the waterproof sheet side protective sheet 32 is a synthetic resin film. Since the material constituting the roof side protective sheet 31 is paper and the material constituting the waterproof sheet side protective sheet 32 is a synthetic resin film, the rigidity of the roof side protective sheet 31 is higher than the rigidity of the waterproof sheet side protective sheet 32. Can be easily increased, and the entire ventilation structure 1 can be made to have appropriate rigidity.

Examples of the paper material constituting the roof side protective sheet 31 include kraft paper, rugged base paper, and paperboard. Above all, the paper material constituting the roof side protective sheet 31 is preferably kraft paper. Since the paper material constituting the roof side protective sheet 31 is kraft paper, the rigidity of the roof side protective sheet 31 becomes appropriate, and the roof side protective sheet 31 can be easily handled. Therefore, the ventilation structure 1 Workability in the process of peeling off the roof side protective sheet 31 from the roof side is improved.

Examples of the synthetic resin constituting the waterproof sheet side protective sheet 32 include a polyolefin resin, a vinyl chloride resin, a polyester resin and the like. Above all, the synthetic resin constituting the waterproof sheet side protective sheet 32 is preferably polypropylene. Since the synthetic resin constituting the tarpaulin side protective sheet 32 is polypropylene, the rigidity is lower than that of the roof side protective sheet 31, and the handleability of the tarpaulin side protective sheet 32 is improved. It becomes easier to perform work in the process of peeling off the sheet-side protective sheet 32.

The waterproofing method of the present invention is a waterproofing method using a ventilation structure 1 having a roof side protective sheet 31 on the roof side surface and a waterproof sheet side protective sheet 32 on the side surface of the waterproof sheet, and a waterproof sheet. A step of peeling off at least a part of the roof side protective sheet 31 of the ventilation structure 1, a step of arranging the ventilation structure 1 on the roof, a step of arranging a waterproof sheet on the ventilation structure 1, and a ventilation structure. The step of peeling off the waterproof sheet side protective sheet 32 of 1 is sequentially performed. By peeling off at least a part of the roof side protective sheet 31 and arranging the ventilation structure 1 on the roof, and after arranging the waterproof sheet on the ventilation structure 1, the waterproof sheet side protective sheet 32 is peeled off to form a roof. The ventilation structure 1 and the ventilation structure 1 and the waterproof sheet can be easily arranged at an intended position, the working time of the waterproofing method can be shortened, and a beautiful finish can be obtained.

Each process of the waterproofing method will be described below. In the waterproofing method, a ventilation structure 1 having a roof side protective sheet 31 on the roof side surface and a waterproof sheet side protective sheet 32 on the side surface of the waterproof sheet, and a waterproof sheet are used. In the following description of the waterproofing method, the description of the part overlapping with the above description of the ventilation structure 1 will be omitted.

First, at least a part of the roof side protective sheet 31 of the ventilation structure 1 is peeled off. By removing the roof side protective sheet 31 from the ventilation structure 1, the roof side surface of the ventilation structure 1 is exposed, and the next step of arranging the ventilation structure 1 on the roof becomes easy.

It is preferable to have a step of applying a primer to the roof before the step of peeling off the roof side protective sheet 31 of the ventilation structure 1. By applying the primer to the roof, the ventilation structure 1 can be sufficiently fixed to the roof.

After the step of peeling off the roof side protective sheet 31 of the ventilation structure 1, the ventilation structure 1 is arranged on the roof. By arranging the ventilation structure 1 on the roof, a space for ventilation is provided between the roof and the waterproof sheet, and gas such as water vapor generated from the roof portion can be ventilated in the plane direction of the waterproof sheet. It is possible to prevent the waterproof sheet from swelling or breaking. The method of fixing the ventilation structure 1 to the roof is not particularly limited, and for example, an adhesive or the like can be used.

In the step of peeling off the roof side protective sheet 31 of the ventilation structure 1 and the step of arranging the ventilation structure 1 on the roof, the roof side protection sheet 31 at the end of the ventilation structure 1 is peeled off, and the roof side protection sheet 31 is attached. It is preferable to bring the end portion of the peeled ventilation structure 1 into contact with the roof and arrange the ventilation structure 1 on the roof while peeling off the remaining roof side protective sheet 31. By bringing the end of the ventilation structure 1 from which the roof side protective sheet 31 has peeled off into contact with the roof and arranging the ventilation structure 1 on the roof while peeling off the remaining roof side protection sheet 31, the roof side protection sheet 31 Since the roof side surface of the ventilation structure 1 that has been peeled off can be immediately placed on the roof, it is possible to prevent the surface of the roof side surface of the ventilation structure 1 from being scratched or adhering dust or dirt, and ventilation is possible. The fixing force of the structure 1 to the roof can be increased.

After the step of arranging the ventilation structure 1 on the roof, the waterproof sheet is arranged on the ventilation structure 1. In the step of arranging the waterproof sheet on the ventilation structure 1, the waterproof sheet side protective sheet 32 of the ventilation structure 1 is not peeled off. That is, there is a waterproof sheet side protective sheet 32 on the side surface of the waterproof sheet of the ventilation structure 1, and the waterproof sheet is arranged on the waterproof sheet side protective sheet 32. In the process of arranging the waterproof sheet on the ventilation structure 1, the waterproof sheet side protective sheet 32 of the ventilation structure 1 is not peeled off, so that the waterproof sheet is not fixed to the ventilation structure 1 and is waterproof. The position of the sheet can be finely adjusted, and the workability of the waterproof method can be improved.

After the step of arranging the waterproof sheet on the ventilation structure 1, the waterproof sheet side protective sheet 32 of the ventilation structure 1 is peeled off. Specifically, in the step of peeling off the waterproof sheet side protective sheet 32 of the ventilation structure 1, after peeling off the waterproof sheet side protection sheet 32 at the end of the ventilation structure 1, the ventilation structure 1 and the waterproof sheet are separated. The waterproof sheet side protective sheet 32 is pulled sideways from between, the waterproof sheet side protective sheet 32 is peeled off, and the waterproof sheet is fixed to the ventilation structure 1. The method of fixing the ventilation structure 1 to the waterproof sheet is not particularly limited, and for example, an adhesive or the like can be used.

As described above, the ventilation structure is a ventilation structure arranged on the roof side surface of the waterproof sheet, and has a rubber layer and a woven fabric. By having the rubber layer and the woven cloth, the ventilation structure can provide a space for ventilation on the roof side surface of the waterproof sheet, and the gas such as water vapor generated from the roof portion can be removed from the waterproof sheet. It is possible to ventilate in the plane direction of.

Further, as described above, the waterproof construction method is a waterproof construction method using a ventilation structure having a roof side protective sheet on the roof side surface and a waterproof sheet side protective sheet on the side surface of the waterproof sheet, and a waterproof sheet. , The process of peeling off at least a part of the roof side protective sheet of the ventilation structure, the process of arranging the ventilation structure on the roof, the process of arranging the waterproof sheet on the ventilation structure, and the waterproof sheet of the ventilation structure. The steps of peeling off the side protective sheet are sequentially performed. In the waterproof construction method, by using a ventilation structure, a ventilation space is provided on the roof side surface of the waterproof sheet to allow gas generated from the roof portion to be ventilated in the plane direction of the waterproof sheet, and at least a part of the ventilation structure. The process of peeling off the roof side protective sheet, the process of arranging the ventilation structure on the roof, the process of arranging the waterproof sheet on the ventilation structure, and the process of peeling off the waterproof sheet side protective sheet of the ventilation structure. By sequentially performing the above steps, it is possible to make it easier to attach the waterproof sheet to the intended position neatly.

1: Ventilation structure 10: Rubber layer 20: Woven cloth 21: First thread 22: Second thread 31: Roof side protective sheet 32: Waterproof sheet side protective sheet 40: Aligned thread 50: Single thread D1: Pull Spacing between the aligned yarn and the aligned yarn adjacent to the aligned yarn D2: Spacing between the single yarn and the adjacent single yarn

Claims (9)

A ventilation structure placed on the roof side of the tarpaulin,
With a rubber layer,
A ventilation structure characterized by having a woven fabric. The threads constituting the woven fabric include a first thread and a second thread.
The ventilation structure according to claim 1, wherein the first thread is thicker than the second thread. The ventilation structure according to claim 1 or 2, wherein at least one of the warp and weft constituting the woven fabric includes a pull-aligned yarn in which a plurality of yarns are aligned in parallel. The woven fabric has a plurality of the aligned yarns and a plurality of single yarns.
The ventilation structure according to claim 3, wherein the distance between the pull-aligned yarn and the drawn-aligned yarn adjacent to the pulled-aligned yarn is larger than the distance between the single yarn and the adjacent single yarn. body. The ventilation structure according to claim 3 or 4, wherein the number of yarns constituting the drawn yarn is 5 or more and 50 or less. The ventilation structure according to any one of claims 1 to 5, wherein the rubber layer contains butyl rubber. It has a roof side protective sheet on the roof side,
It has a tarpaulin side protective sheet on the tarpaulin side,
The ventilation structure according to any one of claims 1 to 6, wherein the rigidity of the roof side protective sheet is higher than the rigidity of the waterproof sheet side protective sheet. The material constituting the roof side protective sheet is paper.
The ventilation structure according to claim 7, wherein the material constituting the waterproof sheet side protective sheet is a synthetic resin film. A waterproof construction method using the ventilation structure according to claim 7 or 8 and a waterproof sheet.
The step of peeling off the roof side protective sheet of at least a part of the ventilation structure,
The process of arranging the ventilation structure on the roof and
The step of arranging the waterproof sheet on the ventilation structure and
A waterproofing method characterized by sequentially performing a step of peeling off the waterproof sheet side protective sheet of the ventilation structure.

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