JP7374841B2 - Waterproofing method and structure - Google Patents

Description

The present invention relates to a waterproofing method for repairing an FRP waterproof layer on a balcony of a wooden house, and a waterproof structure formed by the method.

Conventionally, various technologies have been proposed for waterproofing methods and waterproof structures for repairing FRP waterproof layers on balconies of wooden houses. "Structure and waterproofing methods".

The "waterproofing method" described in Patent Document 1 includes a first step of laying a waterproof sheet on a part of the target area of the base, which is a flat surface, and at least a peripheral area of the target area where the waterproof sheet is not laid. The waterproof sheet includes a resin sheet containing a polyvinyl chloride resin, and is provided on one side of the resin sheet and adhered to the base. an adhesive layer, the adhesive layer is provided in a partial area of the resin sheet, and the waterproof coating film includes a polyurethane resin, and is provided in contact with the resin sheet on at least a part of the surface of the periphery of the waterproof sheet. It is said that it will be done.

JP 2019-78085 Publication

The "waterproofing method" described in Patent Document 1 has the advantage of providing a "waterproof structure" that does not require the use of fixing tools, suppresses swelling, and is easy to construct. However, in some aspects, it is not possible to sufficiently meet the demands of the industrial field to which the present invention pertains, such as shortening the construction period, improving the protective function of the waterproof layer (durability, weather resistance), and improving the design. This is the actual situation.

Therefore, the problem to be solved by the present invention is to provide a waterproof construction method and waterproof structure that can shorten the construction period, improve the waterproof layer protection function (durability, weather resistance), and improve the design. It is in.

The waterproofing method according to the present invention is a waterproofing method for repairing an FRP waterproof layer on the balcony of a wooden house,
A base treatment process to smooth out the unevenness of the top coat of the existing FRP waterproof layer;
a step of applying a primer for FRP on the smoothed surface of the top coat;
forming at least one urethane waterproof layer on the surface of the primer;
a step of applying a top coat to the surface of the urethane waterproof layer;
applying a urethane adhesive to the surface of the top coat;
The method is characterized by comprising the step of pasting a vinyl chloride sheet on the surface of the urethane adhesive.
Note that the FRP is an abbreviation for "Fiberglass Reinforced Plastics."

The waterproof structure according to the present invention is a waterproof structure formed by repairing the FRP waterproof layer of the balcony of a wooden house,
A primer for FRP that covers the surface of the top coat of the existing FRP waterproof layer,
at least one urethane waterproof layer covering the surface of the primer;
a top coat that covers the surface of the urethane waterproof layer;
a urethane adhesive that covers the surface of the top coat;
A vinyl chloride sheet is attached to the surface of the urethane adhesive.

According to the present invention, it is possible to provide a waterproof construction method and a waterproof structure that can shorten the construction period, improve the waterproof layer protection function (durability, weather resistance), and improve the design.

It is a vertical sectional view showing an existing FRP waterproof layer of a balcony of a wooden house with a part omitted. 1 is a partially omitted vertical cross-sectional view showing a waterproof structure according to an embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the waterproofing method and waterproofing structure which are embodiments of this invention are demonstrated based on FIG. 1, FIG. 2.

FIG. 1 shows an existing FRP waterproof layer 100 that is a construction target of the waterproof construction method and waterproof structure according to the present embodiment. The FRP waterproof layer 100 was constructed based on "Architectural Institute of Japan JASS8 standard specifications".
As shown in FIG. 1, in the FRP waterproof layer 100, a wooden plywood (veneer board) 102 is laid on the top surface of a wooden joist 101, and a primer 103 for FRP is applied to the top surface of the wooden plywood 102. An FRP resin layer 104 is formed on the upper surface.

The FRP resin layer 104 is formed by overlaying an FRP resin 104a and a glass fiber mesh sheet 104b. A top coat 105 is applied to the upper surface of the FRP resin layer 104. As the top coat 105, a polyester top coat or an acrylic urethane top coat is used. As shown in FIG. 1, the surface of the top coat 105 has irregularities and unevenness due to aging.

Next, the waterproofing method and waterproof structure according to the present embodiment will be explained based on FIG. 2. In the waterproof structure 10 shown in FIG. 2, parts common to the FRP resin layer 104 shown in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and the description thereof will be omitted.

In the waterproofing method according to the present embodiment, as shown in FIG. 1, surface treatment is performed on the top coat 105, which has become uneven and uneven due to aging. Specifically, the surface of the top coat 105 is smoothed by smoothing out unevenness or unevenness, and removing dirt and dust (base treatment step).

Next, as shown in FIG. 2, a primer 1 for FRP is applied to the smoothed surface of the top coat 105. Although the primer 1 is not limited, a dedicated primer containing urethane resin and polyester resin is suitable.

After applying the primer 1, the primer 1 is allowed to stand for about half a day to dry, and then two layers of urethane waterproofing paint are applied to the surface of the primer 1 to form a urethane waterproofing layer 2. In this case, after applying the first urethane waterproof paint, it is necessary to leave it for about half a day to dry, and then apply the second urethane waterproof paint. The urethane waterproof paint is not limited, but for example, "(trade name) DP One Guard Zero" from "Dip Roofing Co., Ltd." is suitable.

After the second application of the urethane waterproof paint is completed and the urethane waterproof layer 2 is left to stand for about half a day to dry, a urethane top coat 3 is applied to the surface of the urethane waterproof layer 2. The reason for applying the urethane top coat 3 is to ensure the adhesive action of the urethane adhesive 4 that will be used thereafter. The urethane top coat 3 is not limited, but a weak solvent-based environmentally friendly top coat is suitable.

After the application of the urethane top coat 3 is completed, the size of the vinyl chloride sheet 5 to be adhered to the upper surface of the urethane top coat 3 via the urethane adhesive 4 is adjusted. For example, they perform adjustment work such as cutting vinyl chloride sheets delivered to the construction site in the form of long sheets into appropriate sizes. Although the vinyl chloride sheet 5 is not limited, for example, "(trade name) NONSKID series" manufactured by "Sangetsu Co., Ltd." is suitable.

When the size adjustment of the vinyl chloride sheet 5 is completed, apply the urethane adhesive 4 to the surface of the urethane top coat 3 at a coating amount of about 0.35 kg/m ² , and leave it for about 20 to 50 minutes. Dry and degas. The urethane adhesive 4 is not limited, but for example, "(trade name) WPX" manufactured by "Sangetsu Co., Ltd." is suitable.

After the urethane adhesive 4 has been applied and dried and degassed, a vinyl chloride sheet 5 is pasted on the surface of the urethane adhesive 4 to complete the construction and form the waterproof structure 10 shown in FIG. 2. Ru.

As shown in FIG. 2, the waterproof structure 10 includes an FRP primer 1 that covers the smoothed surface of the top coat 105 of the existing FRP waterproof layer 100, and a two-layer urethane waterproof layer 2 that covers the surface of the primer 1. , a urethane top coat 3 covering the surface of the urethane waterproof layer 2, a urethane adhesive 4 covering the surface of the urethane top coat 3, and a vinyl chloride sheet 5 stuck to the surface of the urethane adhesive 4. We are prepared.

In the waterproofing method explained based on FIGS. 1 and 2, the process from the base treatment of the top coat 105 of the existing FRP waterproof layer 100 to the formation of the urethane waterproof layer 2, and the urethane coating on the top surface of the urethane waterproof layer 2 are explained. Since the process of attaching the vinyl chloride sheet 5 via the coat 3 and the urethane adhesive 4 is performed in a series of operations, it is possible to shorten the construction period.

Furthermore, since the vinyl chloride sheet 5 is adhered to the upper surface of the urethane waterproof layer 2, the waterproof layer protection function (durability, weather resistance) is greatly improved. Furthermore, since the vinyl chloride sheet 5 can have various colored patterns or uneven patterns on its surface, the design of the veranda of a wooden house can be improved.

The waterproofing method and waterproof structure 10 described based on FIGS. 1 and 2 are examples of the waterproofing method and waterproof structure according to the present invention. The construction method and waterproof structure 10 are not limited.

The waterproofing method and waterproof structure according to the present invention can be widely used in industrial fields such as the building industry and the construction industry as a technique for repairing the FRP waterproof layer of the balcony of a wooden house.

1 Primer 2 Urethane waterproof layer 3 Urethane top coat 4 Urethane adhesive 5 PVC sheet 100 Existing FRP waterproof layer 101 Joist 102 Plywood (veneer board)
103 Primer for FRP 104 FRP resin layer 104a FRP resin 104b Mesh sheet 105 Top coat

Claims (2)

A waterproofing method for repairing the FRP waterproof layer on the balcony of a wooden house,
A base treatment process to smooth out the unevenness of the top coat of the existing FRP waterproof layer;
a step of applying a primer for FRP on the smoothed surface of the top coat;
forming at least one urethane waterproof layer on the surface of the primer;
a step of applying a top coat to the surface of the urethane waterproof layer;
applying a urethane adhesive to the surface of the top coat;
A waterproofing method comprising the step of pasting a vinyl chloride sheet on the surface of the urethane adhesive. A waterproof structure formed by repairing the FRP waterproof layer on the balcony of a wooden house,
an FRP primer that covers the surface of the top coat of the FRP waterproof layer;
at least one urethane waterproof layer covering the surface of the primer;
a top coat that covers the surface of the urethane waterproof layer;
a urethane adhesive that covers the surface of the top coat;
A waterproof structure comprising: a vinyl chloride sheet adhered to the surface of the urethane adhesive.

Images