JP7742742B2 - Building flood prevention structure - Google Patents

Description

This invention relates to a building flood prevention structure that can prevent water from entering a building due to flooding around the building.

Patent Document 1 discloses a thermal insulation structure for a building. This thermal insulation structure for a building includes a perimeter foundation that supports the building and rises above the ground, a foundation packing installed on the perimeter foundation, and a base installed on the foundation packing. The thermal insulation structure includes a foundation insulation material that covers the outdoor or indoor side of the perimeter foundation, a packing insulation material that covers the outdoor or indoor side of the foundation packing and is positioned between the perimeter foundation and the foundation insulation, and a pressing member that is fixed to the outdoor or indoor side of the base with a fixing member and presses the packing insulation toward the perimeter foundation and the foundation insulation.

Japanese Patent Application Laid-Open No. 2018-165448

In the thermal insulation structure of the building, the vertical fascias are fixed to the studs with nails or the like, with a moisture-permeable waterproof sheet sandwiched between them and the exterior side of the exterior wall insulation. However, while this moisture-permeable waterproof sheet is adhered to the exterior wall insulation to prevent rainwater from seeping in during rainfall, it is believed that such adhesion may not easily prevent water from seeping into the building in the event of flooding around the building due to, for example, internal flooding.

This invention provides a building flood prevention structure that can prevent water from entering a building through a waterproof sheet adhered to an insulating surface material such as exterior wall insulation, in the event of flooding around the building due to inland flooding or other causes.

The building flood prevention structure of this invention comprises:
The foundations of the building and
a base fixed on the foundation;
A plurality of pillars fixed on the base;
A plurality of heat insulating face materials arranged on the outdoor side of the plurality of columns or between the columns;
An indoor elastic adhesive sealant applied to the side edge side of the heat insulating face material and the lower side of the heat insulating face material;
A plurality of waterproof sheets attached to the outdoor surface of the heat insulating face material by the indoor elastic adhesive sealant;
An outdoor elastic adhesive sealant applied to the outdoor side of the joint between adjacent waterproof sheets and to the lower edge area of the waterproof sheet;
The present invention is characterized by comprising:

With the above configuration, the indoor-side elastic adhesive sealant applied to the side edges and lower portion of the insulating facing allows for simultaneous sealing of the relevant areas and affixing of the waterproof sheet to the outdoor surface of the insulating facing. Even if the waterproof sheet is torn, the indoor-side elastic adhesive sealant maintains its sealing state, preventing water from seeping into the building. Furthermore, since the outdoor-side elastic adhesive sealant is applied to the outdoor side of the joints between adjacent waterproof sheets and the lower edge area of the waterproof sheet, even if there is a defect in the adhesion of the waterproof sheet with the indoor-side elastic adhesive sealant at the joints between adjacent waterproof sheets, the defect can be properly overcoated and sealed with the outdoor-side elastic adhesive sealant. Furthermore, the indoor-side elastic adhesive sealant and the outdoor-side elastic adhesive sealant are made of the same material, avoiding the inefficiency of preparing multiple types of materials when using different types of materials and reducing problems caused by misuse.

The indoor-side elastic adhesive sealant and the outdoor-side elastic adhesive sealant are applied up to a predetermined height, which is the expected flood height, and any height above the predetermined height may be waterproofed against rain. This prevents excessive use of the indoor-side elastic adhesive sealant, etc.

In the above-mentioned building flood prevention structure,
The horizontal beams are fixed to the exterior side of the foundation.
the heat insulating face material is an exterior wall heat insulating material arranged on the horizontal beam across the outdoor side of the plurality of columns,
The indoor-side elastic adhesive sealant is also applied to the outdoor surface of the horizontal rail,
The waterproof sheet may also be attached to the exterior surface of the cross rail.

In the above-mentioned building flood prevention structure,
A vertical furring strip arranged on the outdoor side of the waterproof sheet;
An adhesive water-stopping layer portion located between the vertical furring strip and the waterproof sheet;
Screws that penetrate the vertical furring strips, the adhesive water-stopping layer portion, and the waterproof sheet to fix the vertical furring strips to the base and the pillars;
According to this, the adhesive water blocking layer portion adhering to the surface of the screw can prevent water from entering through a gap between the surface of the screw and the hole made by the screw.

Alternatively, in the above-mentioned building flood prevention structure,
an exterior wall fastener arranged on the outdoor side of the waterproof sheet;
an adhesive water stopping layer portion located between the exterior wall fastener and the waterproof sheet;
screws that penetrate the exterior wall fasteners, the adhesive water-stopping layer, and the waterproof sheet to fix the exterior wall fasteners to the base and the pillars;
may also be provided.

The lower region of the outdoor-side elastic adhesive sealant may be applied so that it extends to the top edge of the foundation. In this way, even if there are areas where the waterproof sheet is not properly sealed when the indoor-side elastic adhesive sealant is applied to the horizontal rails, the lower region of the outdoor-side elastic adhesive sealant can prevent water from seeping in from those areas. The lower region can also prevent water from seeping in from the underside of the horizontal rail to the base.

The lower area of the exterior-side elastic adhesive sealant that extends to the top of the foundation may be covered with a base flashing. This prevents the lower area of the exterior-side elastic adhesive sealant from detracting from the aesthetic appearance of the building.

This invention has the effect of preventing water from entering the building through the waterproof sheet adhered to the insulating surface material, such as exterior wall insulation, even in the event of flooding around the building due to inland flooding or other causes.

1A and 1B are diagrams showing a building flood prevention structure according to an embodiment, in which FIG. 1A is a schematic vertical cross-sectional view, and FIG. 1B is a schematic horizontal cross-sectional view. 2 is a perspective view showing a manufacturing process of a corner portion of a building having the building flood prevention structure of FIG. 1. FIG. FIG. 3 is a perspective view showing a post-process step of FIG. 2; FIG. 4 is a perspective view showing a post-process step of FIG. 3; FIG. 5 is a perspective view showing a post-process step of FIG. 4 . FIG. 6 is a perspective view showing a process subsequent to that shown in FIG. 5; FIG. 7 is a perspective view showing a process subsequent to that shown in FIG. 6; FIG. 8 is a perspective view showing a post-process step of FIG. 7; FIG. 9 is a perspective view showing a post-process step of FIG. 8; FIG. 10 is a perspective view showing a post-process step of FIG. 9 . FIG. 11 is a perspective view showing a post-process step of FIG. 10 . FIG. 12 is a perspective view showing a post-process step of FIG. 11 . FIG. 13 is a perspective view showing a post-process step of FIG. 12 . FIG. 14 is a perspective view showing a post-process step of FIG. 13 . FIG. 15 is a perspective view showing a post-process step of FIG. 14 . This is a diagram showing another embodiment of a building flood prevention structure, and is a schematic horizontal cross-sectional view of a structure that supports exterior wall surface materials without using vertical furring strips.

Hereinafter, an embodiment according to one aspect of the present invention will be described with reference to the accompanying drawings.
1A shows a schematic vertical cross section of a corner of a building having a building flood prevention structure 1 according to an embodiment, and FIG. 1B shows a schematic horizontal cross section of the corner. In these figures, the thickness of the components and the spacing between the components may differ from the actual values in order to make the component configuration easier to understand.

The building flood prevention structure 1 has a foundation 11 and a wooden base 12 fixed onto the foundation 11. Furthermore, multiple rows of water-stopping materials 13 are provided between the top of the foundation 11 and the base 12, and a moisture-proof sheet 14 is laid on top of the water-stopping materials 13 to cover the top of the foundation 11. The moisture-proof sheet 14 and water-stopping materials 13 are primarily intended to prevent moisture from the concrete of the foundation 11 from transferring to the base 12, and do not provide a very high level of waterproofing against flooding. The top of the foundation 11 may be made of a leveler.

A number of pillars 2 are fixed at predetermined intervals on the base 12. In addition, partition studs 2A are provided between the pillars 2, and insulating material such as glass wool is provided between the pillars 2 and the partition studs 2A. A horizontal crosspiece 21 made of wood is placed on the outdoor side of the base 12, on the top edge of the foundation 11, and this horizontal crosspiece 21 is fixed to the base 12 with screws or the like. Furthermore, a wall plywood packing 22 is fixed to the outdoor side of the pillar 2 with screws or the like.

On the outdoor side of the pillars 2 (in this embodiment, on the outdoor side of the wall plywood packing 22), multiple sheets of exterior wall insulation material 31 (for example, Styrofoam product name: 30 mm thick) made of foam plastic material or the like that make up the exterior wall section 3 are arranged. The exterior wall insulation material 31 is arranged in a row on the cross beams 21 across the outdoor sides of the multiple pillars 2.

An indoor-side elastic adhesive sealant 41 is applied so as to seal the outdoor side of the joints (horizontal edge side) between adjacent pieces of exterior wall insulation 31, and so as to extend from the outdoor surface of the lower part of the exterior wall insulation 31 to the outdoor surface of the horizontal rail 21. The indoor-side elastic adhesive sealant 41 functions as an amorphous waterproofing agent, and has adhesive properties and a certain degree of elasticity even after drying. Examples of the indoor-side elastic adhesive sealant 41 include a one-component modified silicone resin-based elastic adhesive (such as MPX-1 manufactured by Konishi Co., Ltd.), or a caulking agent with adhesive properties and elasticity (elastic recovery rate) equivalent to those of this elastic adhesive.

Then, multiple moisture-permeable waterproof sheets (sometimes simply referred to as waterproof sheets) 32 are attached to the exterior surfaces of the exterior wall insulation 31 and cross bars 21 using the indoor-side elastic adhesive sealant 41 applied as described above. That is, the lower portions of the moisture-permeable waterproof sheets 32 are adhered from the lower portions of the exterior wall insulation 31 to the cross bars 21 using the indoor-side elastic adhesive sealant 41. Furthermore, the left and right edges of adjacent moisture-permeable waterproof sheets 32 overlap slightly. The moisture-permeable waterproof sheets 32 are adhered to the exterior wall insulation 31 with the indoor-side elastic adhesive sealant 41 within a predetermined height range. This predetermined height is the expected flood height, and is, for example, 800 mm or less above ground level. The outdoor-side elastic adhesive sealant 42, described below, is also applied up to the predetermined height, and general rainproofing treatment may be applied above the predetermined height.

An exterior-side elastic adhesive sealant 42 is applied to the exterior side of the joints between adjacent moisture-permeable waterproof sheets 32 and to the area extending from the lower edge of the moisture-permeable waterproof sheets 32 to the exterior surface of the horizontal rail 21. Examples of the exterior-side elastic adhesive sealant 42 include a one-component modified silicone resin-based elastic adhesive (e.g., MPX-1 manufactured by Konishi Co., Ltd.) or a caulking agent with adhesive properties and elasticity (elastic recovery rate) equivalent to that of the elastic adhesive. The interior-side elastic adhesive sealant 41 and the exterior-side elastic adhesive sealant 42 do not need to be identical products from the same manufacturer, but they should be similar enough to be interchangeable. It is desirable for the interior-side elastic adhesive sealant 41 and the exterior-side elastic adhesive sealant 42 to have a 50% modulus of 0.2 N/ ^mm² or less (low modulus).

In addition, waterproof sheets 32A, rather than breathable waterproof sheets 32, are attached to the outdoor surfaces of the exterior wall insulation 31 located at the corners.

Vertical furring strips (vertical furring strips) 34 are positioned on the exterior side of the waterproof sheets 32, 32A, and each vertical furring strip 34 is fixed to the base 12 and pillars 2 with screws 51. The lower ends of the vertical furring strips 34 are located below the lower end of the exterior wall insulation 31. An adhesive water-stopping layer 33 (e.g., self-fusing tape (butyl rubber tape, etc.)) with adhesive and water-stopping properties is positioned between the vertical furring strips 34 and the waterproof sheets 32, 32A. The lower end of the adhesive water-stopping layer 33 is located below the lower end of the exterior wall insulation 31. The tip of the screw 51 penetrates the vertical furring strips 34, adhesive water-stopping layer 33, moisture-permeable waterproof sheet 32, and exterior wall insulation 31 to reach the base 12. Support brackets (not shown) are fixed to the vertical furring strips 34, and these support brackets support the exterior wall surface material 35.

The lower region of the outdoor-side elastic adhesive sealant 42 extends to the top edge of the foundation 11 and is also extended and applied to the upper side of the outdoor-side rising surface of the foundation 11. The extended and applied outdoor-side elastic adhesive sealant 42 (lower region) is then covered by the base flashing 5. The base flashing 5 is fixed to the cross beam 21 with screws.

That is, the building flood prevention structure of this embodiment is as follows:
The foundation of the building 11,
a base 12 fixed on the foundation 11;
A plurality of pillars 2 fixed on the base 12;
A horizontal beam 21 fixed to the outdoor side of the base 12;
A plurality of exterior wall heat insulating materials 31 arranged on the horizontal beams 21 across the outdoor side of the plurality of columns 2;
an indoor-side elastic adhesive sealant 41 applied to the joints between adjacent exterior wall heat insulating materials 31 and from the lower part of the exterior wall heat insulating materials 31 to the outdoor surface of the horizontal rail 21;
a plurality of waterproof sheets 32, 32A attached to the exterior surfaces of the exterior wall heat insulating material 31 and the horizontal rails 21 by the indoor-side elastic adhesive sealant 41;
The waterproof sheet 32 is provided with an outdoor elastic adhesive sealant 42 applied to the outdoor side of the joint between adjacent waterproof sheets 32, 32A and to the area from the lower edge side of the waterproof sheets 32, 32A to the outdoor surface of the cross bar 21.

With the above configuration, the indoor-side elastic adhesive sealant 41 seals the joints between adjacent exterior wall insulation materials 31 and between the exterior wall insulation materials 31 and the cross beams 21, allowing the waterproof sheets 32, 32A to be attached to the outdoor surface of the exterior wall insulation materials 31 simultaneously. Furthermore, even if the moisture-permeable waterproof sheet 32 is torn, the above-mentioned seal provided by the indoor-side elastic adhesive sealant 41 is maintained, preventing water from entering the building. Furthermore, the outdoor-side elastic adhesive sealant 42 is applied to the outdoor side of the joints between adjacent moisture-permeable waterproof sheets 32 and waterproof sheets 32A, and to the area from the lower edge of the waterproof sheets 32, 32A to the outdoor surface of the cross rail 21. Therefore, even if there are any defective adhesive seals with the indoor-side elastic adhesive sealant 41 at the joints between adjacent moisture-permeable waterproof sheets 32 or waterproof sheets 32A, these defective areas can be properly overcoated and sealed with the outdoor-side elastic adhesive sealant 42. Furthermore, the indoor-side elastic adhesive sealant 41 and the outdoor-side elastic adhesive sealant 42 are made of the same material, which avoids the inefficiency of preparing multiple types of material when using different types of materials and also reduces problems caused by misuse.

The indoor-side elastic adhesive sealant 41 and the outdoor-side elastic adhesive sealant 42 are applied up to a predetermined height, which is the expected flood height, and are waterproofed against rain at heights above this predetermined height. This avoids excessive flood prevention measures and prevents excessive use of the indoor-side elastic adhesive sealant 41, etc.

The vertical furring strips 34 are fixed to the base 12 by screws 51 that penetrate the vertical furring strips 34, adhesive water-stopping layer 33, waterproof sheets 32, 32A, and exterior wall insulation 31. As a result, the adhesive water-stopping layer 33, which adheres to the surface of the screws 51, prevents water from seeping in through the gap between the surface of the screws 51 and the holes made by the screws 51.

If the lower region of the outdoor-side elastic adhesive sealant 42 is applied so that it extends to the top edge of the foundation 11, even if there are areas where the waterproof sheets 32, 32A are not properly sealed when attached to the cross bars 21, the lower region of the outdoor-side elastic adhesive sealant 42 can prevent water from seeping in from those areas. The lower region can also prevent water from seeping in from the underside of the cross bars 21 to the base 12. While the top edge of the foundation 11 may be coated with a silicone agent that does not have any particular adhesive properties, different from the outdoor-side elastic adhesive sealant 42, applying the top edge of the foundation 11 with the outdoor-side elastic adhesive sealant 42 avoids the inefficiency of preparing multiple types of materials and reduces problems caused by misuse.

When the lower area of the exterior elastic adhesive sealant 42, which is applied extending to the top edge of the foundation 11, is covered by the base flashing 5, it is possible to prevent the lower area of the exterior elastic adhesive sealant 42 from detracting from the aesthetic appearance of the building.

If the top edge of the foundation 11 is formed with a leveler, it is desirable to extend the lower region of the outdoor-side elastic adhesive sealant 42 to the rising surface (leveler side) of the foundation 11 on the outdoor side. The leveler has a higher water-cement ratio than the concrete of the foundation 11 and is less dense, so there is a risk of water seeping in through the leveler, but this can be prevented by the lower region.

Next, we will explain the method for fabricating a corner of a building equipped with a building flood prevention structure 1 using Figures 2 to 15. Note that these figures show an experimental building flood prevention structure constructed in a water tank to evaluate its flood resistance.

As shown in Figure 2, a foundation 11 is prepared, a waterproofing material 13 is applied to the top of the foundation 11, and a moisture-proof sheet 14 is laid on top of this waterproofing material 13.

As shown in Figure 3, the base 12 is placed on the moisture-proof sheet 14, and this base 12 is fixed to the foundation 11 using anchor bolts 11a and nuts (not shown). Columns 2 are also erected on the base 12.

As shown in Figure 4, horizontal beams 21 made of wood are placed on the outdoor side of the base 12, on the top edge of the foundation 11, and these horizontal beams 21 are fixed to the base 12 with screws or the like. In addition, partition walls 2A are erected on the base 12 between the pillars 2. Furthermore, wall plywood gaskets 22 are fixed to the outdoor sides of the pillars 2 and partition walls 2A with screws or the like.

As shown in Figure 5, multiple sheets of exterior wall insulation material 31 are arranged side by side on the cross beams 21 outside the wall plywood packing 22. The exterior wall insulation material 31 is temporarily fixed to the outdoor surface of the wall plywood packing 22 with nails, for example.

As shown in Figure 6, the indoor-side elastic adhesive sealant 41 is applied to the joints between adjacent exterior wall insulation materials 31, and to the area extending from the bottom of the exterior wall insulation materials 31 to the outdoor surface of the cross rail 21.

As shown in Figure 7, the applied indoor elastic adhesive sealant 41 is spread using a spatula or similar tool.

As shown in Figure 8, the moisture-permeable waterproof sheet 32 is attached to the exterior surface of the exterior wall insulation material 31 and the horizontal beam 21 using an indoor-side elastic adhesive sealant 41.

As shown in Figure 9, the waterproof sheet 32A is attached to the outdoor surface of the exterior wall insulation 31 located at the corner using an indoor-side elastic adhesive sealant 41. To bond the edges of the waterproof sheet 32A and the moisture-permeable waterproof sheet 32 together, the indoor-side elastic adhesive sealant 41 may be spread over the edge of the moisture-permeable waterproof sheet 32.

As shown in Figure 10, the outdoor-side elastic adhesive sealant 42 is applied to the outdoor side of the joint between adjacent waterproof sheets 32, 32A and to the area from the lower edge of the waterproof sheets 32, 32A to the outdoor surface of the cross rail 21.

As shown in Figure 11, the applied outdoor-side elastic adhesive sealant 42 is spread using a spatula or similar tool. At this time, the lower area of the outdoor-side elastic adhesive sealant 42 is extended to the top edge of the foundation 11, and is also spread over the upper side of the outdoor-side rising surface of the foundation 11.

As shown in Figure 12, the base flashing 5 is fixed to the cross beam 21 with screws. This base flashing 5 covers the extended outdoor elastic adhesive sealant 42 (lower area).

As shown in Figure 13, the adhesive water-stopping layer 33 is attached to the outdoor side of the moisture-permeable waterproof sheet 32 where the vertical furring strips 34 will be located (where the screws will be inserted).

As shown in Figure 14, vertical furring strips 34 are placed on the adhesive water-stopping layer 33, and each vertical furring strip 34 is fixed to the base 12 and pillar 2 with screws 51 (see Figure 1). For convenience, the vertical furring strips 34 are shown at the specified height above, but they should actually be of a height corresponding to the height of the exterior wall. The adhesive water-stopping layer 33 may also be made taller to match the height of the vertical furring strips 34.

As shown in Figure 15, the exterior wall panel 35 is fixed to the vertical furring strips 34. Support brackets (not shown) are fixed to the vertical furring strips 34, and the exterior wall panel 35 is supported by these support brackets. In structures that include the above-mentioned support brackets, the screws 51 are also installed to pass through the support brackets.

Figure 16 shows another embodiment of a building water inundation prevention structure that does not have vertical furring strips and in which the exterior wall surface materials are directly supported by exterior wall fasteners 55, which are support fittings. This structure includes exterior wall fasteners 55 positioned on the outdoor side of the waterproof sheets 32, 32A, an adhesive water-stopping layer 33 positioned between the exterior wall fasteners 55 and the waterproof sheets 32, 32A, and screws 51 that penetrate the exterior wall fasteners 55, the adhesive water-stopping layer 33, the waterproof sheets 32, 32A, and the exterior wall insulation 31 to secure the exterior wall fasteners 55 to the base 12 and the columns 2.

The exterior wall fasteners 55 may be ordinary fasteners. Furthermore, joiners 56 can be attached to structures equipped with the exterior wall fasteners 55. The legs of these joiners 56 are positioned on the exterior side of the exterior-side elastic adhesive sealant 42. The structure shown in Figure 1 can also be configured with joiners positioned on the exterior side of the vertical furring strips 34.

Furthermore, the building flood prevention structure of this invention is not limited to those equipped with the above-mentioned exterior wall insulation (exterior insulation) 31. It can also be applied to structures in which an insulating face material is placed between pillars instead of the exterior wall insulation 31. In such structures, the horizontal crosspieces 21 are not required. Furthermore, an indoor-side elastic adhesive sealant 41 is applied to the joints between the horizontal edges of the pillars and the insulating face material.

Although an embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope.

1: Building flood prevention structure 2: Pillar 2A: Stud 3: Exterior wall 5: Base drip 11: Foundation 11a: Anchor bolt 12: Base 13: Water stop material 14: Moisture-proof sheet 21: Cross beam 22: Wall plywood packing 31: Exterior wall insulation material (insulation surface material)
32: Moisture-permeable waterproof sheet 32A: Waterproof sheet 33: Adhesive water-stopping layer portion 34: Vertical furring strip 35: Exterior wall surface material 41: Indoor elastic adhesive sealant 42: Outdoor elastic adhesive sealant 51: Screw 55: Exterior wall fastening metal fittings 56: Joiner

Claims (7)

The foundations of the building and
a base fixed on the foundation;
A plurality of pillars fixed on the base;
A plurality of heat insulating face materials arranged on the outdoor side of the plurality of columns or between the columns;
An indoor elastic adhesive sealant applied to the side edge side of the heat insulating face material and the lower side of the heat insulating face material;
A plurality of waterproof sheets attached to the outdoor surface of the heat insulating face material by the indoor elastic adhesive sealant;
an outdoor-side elastic adhesive sealant that is applied to the outdoor side of the joint between adjacent waterproof sheets and to the area on the lower edge of the waterproof sheets without providing a waterproof member in the gap between the joints of the adjacent waterproof sheets , and that serves as a topcoat seal for the indoor-side elastic adhesive sealant;
A building flood prevention structure characterized by comprising: The building flood prevention structure described in claim 1, wherein the indoor-side elastic adhesive sealant and the outdoor-side elastic adhesive sealant are applied up to a predetermined height that is the expected flood height, and heights above the predetermined height are waterproofed against rain. The building flood prevention structure according to claim 1 or 2,
The horizontal beams are fixed to the exterior side of the foundation.
the heat insulating face material is an exterior wall heat insulating material arranged on the horizontal beam across the outdoor side of the plurality of columns,
The indoor-side elastic adhesive sealant is also applied to the outdoor surface of the horizontal rail,
The building flood prevention structure is characterized in that the waterproof sheet is also attached to the outdoor surface of the cross rail. The building flood prevention structure according to any one of claims 1 to 3,
A vertical furring strip arranged on the outdoor side of the waterproof sheet;
An adhesive water-stopping layer portion located between the vertical furring strip and the waterproof sheet;
Screws that penetrate the vertical furring strips, the adhesive water-stopping layer portion, and the waterproof sheet to fix the vertical furring strips to the base and the pillars;
A building flood prevention structure characterized by comprising: The building flood prevention structure according to any one of claims 1 to 3,
an exterior wall fastener arranged on the outdoor side of the waterproof sheet;
an adhesive water stopping layer portion located between the exterior wall fastener and the waterproof sheet;
screws that penetrate the exterior wall fasteners, the adhesive water-stopping layer, and the waterproof sheet to fix the exterior wall fasteners to the base and the pillars;
A building flood prevention structure characterized by comprising: A building flood prevention structure according to any one of claims 1 to 5, characterized in that the lower region of the exterior-side elastic adhesive sealant is applied and extends to the top edge of the foundation. The building flood prevention structure described in claim 6, characterized in that the lower area of the exterior-side elastic adhesive sealant applied and extending to the top of the foundation is covered by a foundation flashing.