JP2021167549A - Water cut-off structure and water cut-off method - Google Patents

Abstract

To provide a water cut-off structure and the like which can more surely cut off a screwing part of a screw that is screwed into a portion that is not exposed by being blocked by a partition part.SOLUTION: There is provided a water cut-off structure which includes a partition part that partitions the inner side where a wooden part covered with a waterproof sheet is provided and the outer side and is provided on a portion where a screw entering from the outer side is screwed into the wooden part. Each of the partition part and the waterproof sheet includes a first through hole that has the larger inner diameter than the outer diameter of a thread of the screw. The wooden part includes a recess that becomes depressed to the opposite side to the partition part on the partition part side and has the larger inner diameter than the outer diameter of the thread. The screw includes an undefined shape cut-off material which penetrates the first through hole, enters the recess, is screwed into the wooden part and extends between the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet.SELECTED DRAWING: Figure 1

Description

The present invention relates to a water-stopping structure and a water-stopping method for a screwed portion into which a screw is screwed.

Conventionally, as a waterproof structure of the screwed part where the screw is screwed, the waterproof sheet laid on the upper surface of the floor covers the lower part of the wall at the corner part which is the entrance corner between the floor and the wall of the building. A waterproof tape is placed across the upper edge of the riser and the wall surface above it, and the drainer that covers the riser and the waterproof tape is attached to the wall with a fixing screw that penetrates the waterproof tape. The structure is known (see, for example, Patent Document 1). In this draining structure, when attaching the draining material, an irregular water blocking material such as caulking material is applied to the tip of the fixing screw and the screw is tightened, so that the irregular water blocking material applied to the fixing screw is removed. It is said that it spreads around the through hole of the drainer and the upper edge of the waterproof tape to be waterproofed.

JP-A-2017-193920

The amorphous water blocking material such as the caulking material applied to the tip of the screw as described above is removed by the member to which the screw is screwed when the screw is tightened. At this time, the amorphous water blocking material to be removed remains around the tarpaulin and the member to which the screw is screwed, but it does not always remain on the entire circumference of the screw, and the amorphous waterproof material does not always remain. There is a risk of being biased. At this time, if the member to which the screw is screwed is exposed to the outside, an additional amorphous water blocking material may be replenished in a place where the amorphous water blocking material is not spread. When a screw is screwed into the skeleton provided inside the outer wall when attaching a member to the outer wall, it is blocked by the outer wall and it is not possible to additionally replenish the amorphous water blocking material, so it is reliable. There is a risk that the water cannot be stopped.

The present invention has been made in view of such a problem, and an object of the present invention is to more reliably stop water at a screwed portion of a screw that is blocked by a partition portion and screwed into an unexposed portion. It is an object of the present invention to provide a water-stopping structure capable of the water-stopping structure and a water-stopping method.

The main invention for achieving such an object is to provide a partition portion for partitioning the inside and the outside provided with a wood part covered with a waterproof sheet, and a screw entering from the outside is screwed into the wood part. The partition portion and the waterproof sheet each have a first through hole having an inner diameter larger than the outer diameter of the thread of the screw, and the wood portion is on the partition portion side. It has a recess on the opposite side of the partition and has an inner diameter larger than the outer diameter of the thread, and the screw penetrates the first through hole and enters the recess to be screwed into the wood part. A water blocking structure that is fitted and has an indefinite water blocking material extending between the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet. Is.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, there is provided a water stopping structure capable of more reliably stopping water at a screwed portion of a screw screwed into a portion blocked by a partition portion and not exposed, and a water stopping method. It is possible.

It is the schematic of the cross section which shows the water stop structure which concerns on this invention. It is the schematic of the cross section which shows the water-stopping method of this invention. It is the schematic of the cross section explaining the water-stopping method in the case which does not have a furring strip.

Hereinafter, the waterproof structure according to the embodiment of the present invention will be described with reference to the drawings.
The waterproof structure of the present embodiment includes various building attachments such as a balcony railing provided outside the building, a rafter hanging supporting the building side of a roof such as a solarium, an outer shade, and a wall lattice. It is a water-stop structure of the screwed part where the screw that attaches the member constituting the building to the building is screwed into the skeleton or the like. Therefore, in the following description, the member attached to the outer wall 1 is referred to as an attachment member 2, and in the drawing, the cross section of the attachment member 2 which is in contact with the outer wall 1 and is attached by the screw 3 is schematically rectangular. It will be shown and explained.

First, the structure of a building having an outer wall 1 to which the mounting member 2 is mounted will be described.
As shown in FIG. 1, in the skeleton 4 as a wooden part of a building, the surface 4a on the outdoor side is covered with a moisture-permeable waterproof sheet (waterproof sheet) 5, and the outdoor side of the moisture-permeable waterproof sheet 5 is in the vertical direction. An outer wall 1 made of a siding material or the like is provided via a plurality of furring strips 6 provided along the above. That is, an outer wall 1 is provided on the outdoor side of the skeleton 4 covered with the moisture-permeable waterproof sheet 5 at intervals from the waterproof sheet 5, and the plurality of furring strips 6 are the outer wall 1 and the moisture-permeable waterproof sheet 5. They are provided at appropriate intervals in the horizontal direction between the two.

The mounting member 2 is brought into contact with the already provided outer wall 1, and a screw 3 penetrating the outer wall 1 is screwed into the skeleton 4 to be mounted. Therefore, at the position where the screw 3 penetrates, there may be a case where the furring strip 6 is present between the outer wall 1 and the moisture permeable waterproof sheet 5 or a case where the furring strip 6 is not present. Here, a case where the screw 3 is passed through the position where the furring strip 6 exists between the outer wall 1 and the moisture permeable waterproof sheet 5 will be described as an example. Here, the outer wall 1 corresponds to a partition portion for partitioning the inside and the outside provided with a wooden portion covered with a waterproof sheet, and the furring strip 6 is another member existing between the partition portion and the waterproof sheet. Corresponds to. Further, the outside partitioned by the partition portion corresponds to the outdoor side, and the inside corresponds to the indoor side.

The screws 3 for fixing the mounting member 2 include a screw portion 3a that is screwed into the skeleton 4, a screw head 3b that comes into contact with the outdoor side surface 2a of the mounting member 2 when tightened, and a screw portion 3a. It has a columnar non-threaded portion 3c provided between the screw head 3b and the screw head 3b and not provided with a thread. In the present embodiment, as shown in FIG. 2C, the length L1 of the non-threaded portion 3c is from the outdoor side surface 2a of the mounting member 2 abutting the outer wall 1 to the outdoor side surface of the skeleton 4. The distance to 4a is longer than L2 (FIG. 1), and the outer diameter D1 of the non-threaded portion 3c is formed to be larger than the outer diameter D2 of the thread of the threaded portion 3a. Further, the threaded portion 3a before screwing is provided with an amorphous water blocking material 7 such as putty sealant or unvulcanized rubber on the peripheral surface.

The outer wall 1, the mounting member 2, the moisture-permeable waterproof sheet 5, and the furring strip 6 have through holes 1a having an inner diameter D3 that is smaller than the screw head 3b of the screw 3 and larger than the outer diameter D1 of the non-threaded portion 3c. 2b, 5a, and 6a are provided coaxially, and the skeleton 4 is formed coaxially with the outer wall 1, the moisture-permeable waterproof sheet 5, and the furring strip 6, and has the same inner diameter D3 and is recessed indoors. A recess 4b is provided on the surface 4a on the outdoor side. The screw 3 enters the recess 4b and is screwed into the skeleton 4 from the outdoor side to the indoor side at the center of the recess. Here, the through holes 1a and 5a provided in the outer wall 1 and the moisture permeable waterproof sheet 5 correspond to the first through holes, and the through holes 6a provided in the furring strip 6 correspond to the second through holes.

In the mounting member 2, the outer wall 1, the mounting member 2, the moisture-permeable waterproof sheet 5, and the screw 3 penetrating the furring strip 6 enter the recess 4b and move from the outdoor side to the indoor side at the center of the recess 4b. It is screwed into the skeleton 4, and is sandwiched and fixed between the outer wall 1 and the screw head 3b. Therefore, the length L1 of the non-threaded portion 3c of the screw 3 is the distance L3 (from the outdoor side surface 2a of the mounting member 2 in contact with the outer wall 1 to the outdoor side surface 4c in the recess 4b of the skeleton 4). It is formed shorter than Fig. 1). In the present embodiment, since the moisture-permeable waterproof sheet 5 is thin, the screw 3 substantially simply penetrates the moisture-permeable waterproof sheet 5, but since the screw 3 enters while rotating, the moisture-permeable waterproof sheet The state in which the screw 3 penetrates the 5 is expressed as a screw.

When the screw 3 is screwed into the skeleton 4, the amorphous water blocking material 7 provided in the screw portion 3a of the screw 3 is scraped off by the skeleton 4 and remains in the recess 4b. As the screw 3 is tightened, the amount of the amorphous water blocking material 7 that is torn off and remains in the recess 4b increases, and overflows from the recess 4b to the outdoor side of the skeleton 4. The overflowing amorphous water blocking material 7 is formed between the outdoor side surface 4a of the skeleton 4 and the moisture permeable waterproof sheet 5, and between the moisture permeable waterproof sheet 5 and the indoor side surface 6b of the furring strip 6, and the furring strip. It has entered between the through hole 6a of 6 and the non-threaded portion 3c of the screw 3. Therefore, water is stopped between the moisture-permeable waterproof sheet 5 and the skeleton 4 by an amorphous water blocking material 7 to prevent water such as rainwater from entering the screwed portion where the screw 3 is screwed. doing.

The water stopping method at the screwed portion of the screw 3 for mounting the mounting member 2 is as follows: first, at the position where the mounting member 2 is to be mounted, that is, the position where the mounting member 2 is to be screwed, a screw 3 is used as shown in FIG. A pilot hole 4d for use is formed. At this time, the pilot hole 4d is formed by penetrating the outer wall 1, the moisture-permeable waterproof sheet 5, and the furring strip 6 from the outdoor side to the indoor side of the outer wall 1 so as to reach the skeleton 4.

Next, as shown in FIG. 2B, the through holes 1a, 5a, and 6a of the inner diameter D3 larger than the outer diameter D1 of the non-threaded portion 3c of the screw 3 are drilled so as to be substantially coaxial with the prepared hole 4d. The outer wall, the moisture-permeable waterproof sheet 5, and the furring strip 6 are formed through the outer wall 1 from the outdoor side to the indoor side, and a drill is further inserted to form a recess 4b in the skeleton 4. do. Here, the step of forming the prepared holes 4d, the through holes 1a, 5a, 6a, and the recesses 4b corresponds to the first step. At this time, the order in which the prepared holes 4d, the through holes 1a, 5a, 6a, and the recesses 4b are formed may be either first. When the furring strip 6 does not exist, the step of forming the prepared holes 4d, the through holes 1a and 5a, and the recesses 4b corresponds to the first step.

Next, as shown in FIG. 2C, the mounting member 2 provided with the outer wall 1, the moisture permeable waterproof sheet 5, and the through holes 1a, 5a, 6a of the furring strip 6 and the through holes 2b having the same inner diameter D3. Is arranged according to the position of the through hole 1a of the outer wall 1, and the screw 3 is inserted into each of the through holes 1a, 2b, 5a, and 6a from the outdoor side of the mounting member 2. At this time, the tip of the screw 3 is brought into contact with the skeleton 4 so that the amorphous water blocking material 7 provided on the screw 3 does not come into contact with the inner circumferences of the through holes 1a, 2b, 5a, and 6a as much as possible.

Finally, as shown in FIG. 1, the screw 3 is screwed into the skeleton 4, and the mounting member 2 is sandwiched between the outer wall 1 and the screw head 3b for mounting. Here, the step of inserting the screws 3 into the through holes 1a, 2b, 5a, and 6a from the outdoor side of the mounting member 2 and screwing the screws 3 into the skeleton 4 corresponds to the second step.

According to the water-stopping structure and the water-stopping method of the present embodiment, the amorphous water-stopping material 7 is placed on at least one surface side of the moisture-permeable waterproof sheet 5 from the inside of the recess 4b of the skeleton 4 to which the screw 3 is screwed. Is provided so that the inside of the recess 4b in which the screw 3 is screwed and between the peripheral edge of the moisture permeable waterproof sheet 5 through which the screw 3 penetrates and the skeleton 4 are irregular water blocking materials. It is sealed by 7. Therefore, it is possible to provide higher waterproofness.

Further, since the through hole 5a provided in the moisture permeable waterproof sheet 5 through which the screw 3 penetrates and the recess 4b of the skeleton 4 have an inner diameter D3 larger than the outer diameter D2 of the screw thread, the screw portion 3a Even when the screw 3 provided with the indefinite water stop material 7 is screwed into the skeleton 4, the indefinite water stop material 7 applied to the screw portion 3a is removed until it is screwed into the skeleton 4. I can't. Therefore, it is possible to stop water between the moisture permeable waterproof sheet 5 and the skeleton 4 by retaining the amorphous water blocking material 7 that has been screwed and removed in the recess 4b and causing it to overflow. .. Therefore, even if the outer wall 1 is provided at a distance from the skeleton 4 into which the screws 3 are screwed, and the skeleton 4 separated from the outside by the outer wall 1 cannot be directly sealed. , The screwed portion into which the screw 3 is screwed can be more reliably and easily stopped from water. That is, it is possible to provide higher water stopping property while screwing the screw 3 into the skeleton 4 which is blocked by the outer wall 1 and is not exposed.

Further, the screw 3 is located between the screw portion 3a screwed into the skeleton 4 and the screw head 3b, which is larger than the outer diameter D2 of the thread and smaller than the inner diameter D3 of the through holes 1a, 2b, 5a, and 6a. Since it has a non-threaded portion 3c having a diameter D1, it is possible to prevent the indefinite water blocking material 7 from moving along the thread groove to the screw head 3b side, and the indefinite type stopping material 7 can be prevented. It is possible to retain more water material 7 in the recess 4b.

Further, since the furring strip 6 existing between the outer wall 1 and the moisture permeable waterproof sheet 5 is also provided with a through hole 6a having an inner diameter D3 larger than the outer diameter D2 of the thread, the outer wall 1 and the moisture permeable waterproof sheet 5 are provided. Even when the furring strip 6 is present between the seat 5 and the seat 5, it is possible to more reliably and easily stop the water in the screwed portion into which the screw 3 is screwed.

Further, since the through holes 1a, 5a, 6a and the recess 4b can be formed at once from the outdoor side of the outer wall 1 to the skeleton 4 by a drill or the like, the outer wall 1, the moisture permeable waterproof sheet 5, and the furring strip 6 can be formed. , Through holes 1a, 5a, 6a having the same inner diameter larger than the outer diameter D2 of the thread can be easily provided coaxially. Further, since the through holes 1a, 5a, and 6a can be easily inserted while the amorphous water blocking material 7 remains on the peripheral surface of the screw portion 3a, more irregular water blocking materials 7 can be formed by the skeleton 4. It is possible to remove it and keep it in the recess 4b, and let it overflow from the recess 4b, and between the outdoor side surface 4a of the skeleton 4 and the moisture permeable waterproof sheet 5, the moisture permeable waterproof sheet 5 and It is possible to more reliably enter between the indoor side surface 6b of the furring strip 6 and between the through hole 6a of the furring strip 6 and the non-threaded portion 3c of the screw 3. For this reason, even if the outer wall 1 is provided at a distance from the skeleton 4 into which the screws 3 are screwed and separates the outside from the moisture-permeable waterproof sheet 5 side, the work from the outdoor side of the outer wall 1 lowers the outer wall 1. Simply by forming the holes 4d, through holes 1a, 5a, 6a and recesses 4b and tightening the screws 3 provided with the irregular water blocking material 7, the moisture permeable waterproof sheet 5 and the skeleton can be more easily and reliably. Provided is a water stopping method capable of stopping water with an irregular water blocking material 7 and preventing water such as rainwater from entering the screwed portion of the skeleton 4 to which the screw 3 is screwed. It is possible to do.

In the above embodiment, the example in which the non-threaded portion 3c is provided on the screw 3 has been described, but the non-threaded portion 3c may not necessarily be provided.

Further, in the above embodiment, the case where the screw 3 is passed through the position where the furring strip 6 exists between the outer wall 1 and the moisture permeable waterproof sheet 5 has been described as an example, but the furring strip does not exist. When the screw 3 is passed through, as shown in FIGS. 3A and 3B, only the furring strip 6 does not exist in the above embodiment, and the skeleton 4 has a pilot hole 4d and a recess 4b. Further, after forming through holes 1a and 5a in the outer wall 1 and the moisture permeable waterproof sheet 5, a screw 3 provided with an amorphous water blocking material 7 in the screw portion 3a is inserted from the through hole 1a side of the outer wall 1. By screwing from the inside of the recess 4b of the skeleton 4, the amorphous water blocking material 7 can be connected from the recess 4b and penetrate to both sides of the moisture permeable waterproof sheet 5. Therefore, even in a position where the furring strip does not exist, it is easier and more reliable to extend between the peripheral surface of the screw 3 in the recess 4b and the peripheral edge of the through hole 5a of the moisture permeable waterproof sheet 5. It is possible to provide the amorphous water blocking material 7, and it is possible to prevent water such as rainwater from entering the screwed portion of the skeleton 4 to which the screw 3 is screwed.

In the above embodiment, an example in which the wood part is the skeleton 4 and the partition part is the outer wall 1 has been described, but the present invention is not limited to this, and the inside and the outside where the wood part covered with the waterproof sheet is provided. It is applicable when a member is attached to the partition portion for partitioning by a screw screwed into a wooden portion.

The above embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. It goes without saying that the present invention can be modified and improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.
The present embodiment includes at least the following inventions.

A partition portion for partitioning the inside and the outside provided with a wooden portion covered with a waterproof sheet is provided, and the water-stopping structure of a portion where a screw entering from the outside is screwed into the wooden portion. Each of the partition portion and the waterproof sheet has a first through hole having an inner diameter larger than the outer diameter of the thread of the screw, and the woody portion is recessed on the partition portion side on the side opposite to the partition portion. The screw has a recess having an inner diameter larger than the outer diameter of the thread, the screw penetrates the first through hole, enters the recess, and is screwed into the wood portion, and the screw in the recess. The water-stopping structure is characterized by having an irregular water-stopping material extending between the peripheral surface of the waterproof sheet and the peripheral edge of the first through hole of the waterproof sheet.

According to such a water-stopping structure, the screw is screwed because it has an indefinite water-stopping material extending between the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet. Water is stopped by an indefinite water blocking material in the recessed portion and between the peripheral edge of the waterproof sheet through which the screw penetrates and the wood part. Therefore, even if the screw penetrates the waterproof sheet, it is possible to provide higher waterproofness. Further, since the first through hole through which the screw penetrates and the recess of the wood part have an inner diameter larger than the outer diameter of the screw thread, for example, in a state where the screw is coated with an irregular water blocking material, the wood part is covered. Even in the case of screwing, the irregular water blocking material applied to the screw is not removed until it is screwed into the wood part. For this reason, the amorphous water blocking material that has been removed from the wood by screwing is retained in the recess, and by overflowing, the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet It is possible to stop the water between them. Therefore, even if the wood portion side to which the screw is screwed and the outside are partitioned by a partition member, the screwed portion can be more reliably and easily stopped from water. That is, it is possible to provide a water-stopping structure capable of providing a higher water-stopping property while screwing a screw into a member that is blocked by a partition and is not exposed.

In the water blocking structure of such a member, the screw is larger than the outer diameter of the thread and smaller than the inner diameter of the first through hole between the screw portion screwed into the wood portion and the screw head. It is characterized by having a non-threaded portion having an outer diameter and having no thread formed.

According to such a water blocking structure, it is possible to prevent the amorphous water blocking material from moving to the screw head side along the screw groove, and the amorphous water blocking material can be fastened more in the recess. Is possible.

In such a water-stopping structure, when another member is present between the partition portion and the waterproof sheet, the screw penetrates the other member and is larger than the outer diameter of the screw thread. Is also characterized in that a second through hole having a large inner diameter is provided.

According to such a waterproof structure, other members existing between the partition portion and the waterproof sheet are also provided with a second through hole having an inner diameter larger than the outer diameter of the thread, so that the partition portion is provided. Even when another member is present between the waterproof sheet and the waterproof sheet, the threaded portion can be more reliably and easily stopped from water.

The water-stopping structure is characterized in that the wooden portion is a skeleton of a building, the partition portion is an outer wall of the building, and an accessory is attached to the building by the screw.

According to such a water-stopping structure, even if the skeleton side to which the screw is screwed and the outside are separated by an outer wall, the screwed portion of the screw can be more reliably and easily stopped from water. .. That is, it is possible to attach an accessory to a building with higher water stopping property while screwing a screw into a skeleton that is blocked by an outer wall and is not exposed.

Further, it is a method of stopping water at a portion where a screw entering from the outside of a partition portion for partitioning an inside and an outside provided with a wood part covered with a waterproof sheet is screwed into the wood part. A prepared hole for screwing the screw and a concave portion having an inner diameter larger than the outer diameter of the thread of the screw, which is provided on the outer peripheral side of the prepared hole and is recessed on the side opposite to the partition portion, are formed. The first step of forming a first through hole having an inner diameter larger than the outer diameter of the thread in the partition portion and the waterproof sheet, and the screw provided with an irregular water blocking material in the thread portion are subjected to the first step. It is a water stopping method characterized by having a second step of penetrating a through hole and screwing it into the prepared hole.

According to such a water stopping method, the inner diameters of the first through hole, the second through hole, and the recess through which the screw passes to reach the prepared hole are larger than the outer diameter of the thread, so that the thread portion has a thread portion. It is possible to screw a screw into a pilot hole in a recess provided in a wooden portion with an irregular water blocking material provided. Therefore, the amorphous water blocking material provided on the screw can be screwed into the wood portion without being scraped off before reaching the prepared hole. For this reason, the amorphous water blocking material that has been screwed and removed is allowed to stay in the recess more and overflow, so that the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet are formed. It is possible to stop the water between them. Therefore, even if the screw is partitioned by a partition member that separates the wood portion side to which the screw is screwed from the outside, the threaded portion can be more reliably and easily stopped from water. That is, it is possible to provide a water stopping method capable of providing a higher water stopping property while screwing a screw into a member which is blocked by a partition portion and is not exposed.

1 outer wall, 1a through hole (first through hole), 2 mounting member,
2b through hole, 3 screw, 3a screw part, 3b screw head,
3c threaded part, 4 skeleton, 4b recess, 4d pilot hole, 5 moisture permeable waterproof sheet,
5a through hole (first through hole), 6 furring strip, 6a through hole (second through hole),
7 Amorphous water blocking material,
D1 Non-threaded outer diameter, D2 Threaded outer diameter,
D3 Inner diameter of first through hole, second through hole, and recess

Claims (5)

A partition portion for partitioning the inside and the outside, which is provided with a wood part covered with a waterproof sheet, is provided, and has a water-stop structure at a portion where a screw entering from the outside is screwed into the wood part.
The partition and the waterproof sheet each have a first through hole having an inner diameter larger than the outer diameter of the thread of the screw.
The xylem portion has a recess on the partition portion side opposite to the partition portion and has an inner diameter larger than the outer diameter of the screw thread.
The screw penetrates the first through hole, enters the recess, and is screwed into the woody portion.
A water blocking structure characterized by having an amorphous water blocking material extending between the peripheral surface of the screw in the recess and the peripheral edge of the first through hole of the waterproof sheet. The waterproof structure according to claim 1.
The screw has an outer diameter larger than the outer diameter of the thread and smaller than the inner diameter of the first through hole between the screw portion screwed into the wood portion and the screw head, and the screw thread is formed. A waterproof structure characterized by having a non-threaded portion. The water-stop structure according to claim 1 or 2.
When another member is present between the partition portion and the waterproof sheet, the screw penetrates the other member and has a second through hole having an inner diameter larger than the outer diameter of the thread. A waterproof structure characterized by being provided with. The water-stop structure according to any one of claims 1 to 3.
The xylem is the skeleton of the building
The partition is the outer wall of the building and
A water-stop structure characterized in that an accessory is attached to the building by the screw. It is a method of stopping water at a portion where a screw entering from the outside of a partition portion for partitioning an inside and an outside provided with a wood part covered with a waterproof sheet is screwed into the wood part.
A pilot hole for screwing the screw into the wood portion and a recess provided on the outer peripheral side of the prepared hole and recessed on the side opposite to the partition portion and having an inner diameter larger than the outer diameter of the screw thread of the screw. Form and
The first step of forming a first through hole having an inner diameter larger than the outer diameter of the thread in the partition portion and the waterproof sheet,
In the second step, the screw provided with the amorphous water blocking material in the screw portion is screwed into the prepared hole through the first through hole.
A water stopping method characterized by having.

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