KR100744727B1 - Expoused double waterproof plus film of paint and sheet in the building and construction method of the same - Google Patents

Abstract

A double exposed waterproof member for a membrane and a sheet of a building structure is provided to double waterproofing effect by placing an asphalt waterproof sheet provided with a colored granule layer on a waterproof coating layer. The double exposed waterproof member for a membrane and a sheet of a building structure includes a rubberized asphalt waterproof coating layer, that is, a rubberized asphalt mastic layer(40) manufactured by mixing a quick drying asphalt compound with one of a synthetic high molecular resinous adhesive composition, natural mineral fibers, petroleum resins and isobutylene or poly isobutylene based synthetic resins and coupled with a base(20) or a primer layer(30) of a building structure, and a self-adhesive exposed asphalt waterproof sheet(70) composed of a sheet layer(50) formed by applying an asphalt-rubber mixture on two sides of synthetic resins to the appointed thickness and a colored granule layer(60) coated with ultraviolet materials on an upper exposed surface and attached on the rubberized asphalt waterproof coating layer.

Description

Exposed double waterproof plus film of paint and sheet in the building and construction method of the same}

1 is a block diagram of an improved asphalt waterproof sheet according to the prior art.

Figure 2 is a cross-sectional view schematically showing the coating film and sheet double exposure waterproofing method of the building structure according to the present invention.

Figure 3 is a perspective view showing the configuration of the asphalt exposed asphalt waterproof sheet used in the present invention.

4 is an exemplary view of the present invention applied to new construction.

5 is an exemplary view of the present invention applied to the repair work.

* Explanation of symbols for the main parts of the drawings

20: ground surface of the concrete structure 30: primer layer

40: rubber asphalt coating film waterproof layer 50: sheet layer

60: colored granule particle layer 70: exposed waterproof sheet

The present invention relates to a double-layer waterproofing method of the coating and sheet of the building structure for waterproofing the roof of the building or the upper part of the parking lot, in particular a coating film having a strong adhesive force, elasticity, elasticity to the concrete object, according to the concrete crack The present invention relates to a coating and sheet double exposure waterproofing material for a building structure that maximizes the coating and sheet double waterproofing effect by combining a waterproof sheet and a waterproof sheet layer formed of an upper exposed layer of colored granule particle layers resistant to ultraviolet rays, and a construction method thereof.

In general, concrete buildings, especially rooftops, are the ones that are most in contact with external factors. They are waterproof to prevent precipitation, reduce the heat load of solar radiation caused by sunlight, and insulate and insulate the heat inside. Appropriate waterproofing method and waterproofing material should be selected in consideration of the ability to handle the loading load acting on the roof surface by function, snow load and weathering load.

For the renovation of the rooftop waterproofing of the building, after removing the existing waterproof layer protection pressed concrete and waterproof layers, form a new waterproof layer (non-exposed waterproof layer) and press the waterproof layer protection again. Press It can be classified by covering the new waterproof layer (exposure waterproof layer) on top of it without removing the concrete layer. The advantages and disadvantages of these methods are as follows.

The non-exposed waterproof layer applied to the deterioration of the existing waterproof layer of the former prevents the impact on the waterproof layer to protect the waterproof layer against cold and snow, and has excellent weather resistance and durability due to the safety of the waterproof layer against UV rays and acid rain, It takes a lot of work, and the construction period is long, and the existing waterproof layer and the waterproof layer are pressed. When the concrete layer is removed, noise and dust are generated.

The latter covering waterproof layer has simple advantages such as simple repair period, short repair period, economical cost of maintenance, and minimal load on the slab due to the formation of a new waterproof layer, while it is not possible to place heavy materials on the rooftop. Are somewhat restricted to

Meanwhile, in order to prevent moisture from penetrating into the exposed areas such as the roof of the building structure, an impermeable waterproof layer is formed on the surface of the structure, and the method of forming such a waterproof layer is exposed asphalt sheet waterproof, liquid waterproof, epoxy Various methods such as waterproofing and polyurethane waterproofing are used.

Here, the exposure-type asphalt sheet waterproofing method is a heat fusion method for the operator to heat the lower surface of the waterproof sheet with a torch lamp to melt the rubber asphalt while adhering to the concrete base surface. The method does not achieve uniform heating of the asphalt waterproof sheet because the asphalt waterproof sheet is heated by the torch lamp depending on the attraction force. Due to this, there is a problem in that the full adhesion with the concrete base surface is not made, thereby partially lifting the sheet waterproof layer. In particular, in the process of heating the bottom surface of the waterproof sheet or the connection joint of the waterproof sheet, the watertightness due to the combustion oxidation of the asphalt compound is weakened, so that there are frequent problems such as leakage accidents.
In addition, the exposed asphalt waterproof sheet applied to the above method had another problem of cracking or lifting after repeated expansion and contraction for many years due to long-term exposure to sunlight in the summer or cold and freezing weather in winter.

Coating waterproofing is to form a coating by applying a liquid coating waterproofing material, which is mainly made of polyurethane or acrylic rubber, several times, which can form a seamless waterproofing layer and can easily construct narrow construction sites, but it is a liquid coating waterproofing material. When sequentially applying a plurality of layers, each time requires a curing time of more than about 24 hours each, so the construction time is long, and if a crack occurs in the structure, the coating material also breaks, causing a leak.

Recently, as a waterproof method performed on a rooftop slab, a composite waterproof method combining an asphalt sheet waterproof and a polyurethane coating waterproof has been proposed and used. This conventional composite waterproof method is presented in Patent Registration No. 0590854. In the composite waterproof method, as shown in FIG. 1, the asphalt sheet 120 is laid on the concrete base surface or the primer layer 110, and the nonwoven fabric layer 130 is formed on the asphalt sheet 120. By installing the polyurethane coating waterproof layer 140 as an exposed surface on the layer 130 is a structure 100 to achieve a bond between the asphalt sheet layer 120 and the coating waterproof layer 140 of a different material.

In the composite waterproof structure 100, the polyurethane layer is excellent in heat resistance and elasticity resistance, so it has a property that does not shrink or expand even in the cold or freezing weather in the summer for a long time in the summer, suitable for waterproofing the exposed surface Is being used.

However, the composite waterproof structure 100 of the asphalt sheet and polyurethane combination is a concrete base surface and the asphalt waterproof sheet layer 120 is partially bonded to form an insulating waterproof layer that floats the sheet waterproof layer from the concrete base surface, concrete There is an advantage that can be installed even in the base surface and some wet conditions, but if there is a fault caused by careless construction, the leaked water flows under the waterproof layer, so there is a big problem that partial repair is impossible.
Particularly, since the polyurethane coating waterproof layer and the asphalt waterproof sheet layer are made of heterogeneous materials, the structure may cause the polyurethane layer to be separated from the asphalt waterproof sheet layer after a long time, leading to a waterproof defect. The construction method proposed in the above is made up of most of the waterproof construction work by manpower of workers, and thus contains the fundamental problem of frequent defects caused by inadvertent construction.

Therefore, the present invention has been proposed to solve the above problems, it is produced by applying colored granule particles to the asphalt mastic coating waterproofing material and the exposed surface for the purpose of waterproofing the coating film, such as the roof of the building or the upper part of the underground parking lot. As a method of attaching the exposed waterproof sheet, it prevents the penetration of water and moisture, and is not affected by alkali or acidic materials, and has high tensile strength, elasticity and durability, and resistance to concrete cracking. The purpose of the present invention is to provide a coating and sheet double exposure waterproofing material and a construction method thereof of the building structure.

In addition, the present invention can be easily applied to the difficult construction site by using a gel-like asphalt mastic coating waterproofing, and easy to find and repair the defect site, as well as coating and sheet of the building structure that can be built in winter Another object is to provide a double exposure waterproofing material and its construction method.

In addition, the present invention can perform the finishing process only by covering the waterproof sheet coated with a layer of granulated granules strong to external ultraviolet rays to the coating waterproof layer without placing protective mortar or pressed concrete as a protective waterproof layer, thereby reducing the construction process. It is another object of the present invention to provide a double-coated waterproofing material and a method of constructing a coating and sheet of a building structure that can reduce the construction cost and shorten the construction period.

In order to achieve the above object, the present invention, a quick-drying asphalt compound (Quick Drying Asphalt Compound) as the main raw material, the synthetic polymer resin adhesive, natural mineral fiber, petroleum resin and isobutylene or poly isobutylene-based synthetic resin to the material It is prepared by mixing the materials of, rubber asphalt coating waterproofing layer is bonded to the building surface or primer layer; And an exposed asphalt waterproof sheet layer laminated on the coating waterproof material, and having a rubber asphalt mixture coated on both sides of a synthetic resin and coated with granulated granules coated with an ultraviolet ray material on an upper exposed surface. It provides a coating film and a sheet double exposed waterproof material.

In addition, the present invention is a quick drying asphalt compound (Quick Drying Asphalt Compound) as a main raw material, by mixing a material of one of synthetic polymer resin adhesive, natural mineral fiber, petroleum resin and isobutylene or poly isobutylene-based synthetic resin to the material A first step of applying the prepared coating waterproofing material to the surface of the mother body to be constructed; A rubber asphalt mixture is coated on both sides of the synthetic resin, a release film is attached to the lower surface, and colored granule particles coated with an ultraviolet ray material (ultraviolet material) are coated on the upper exposed surface. A second step of adhering onto the coating waterproofing material; And applying a secondary coating waterproofing material having the same width as that of the primary coating waterproofing material on a top of one end side of the exposed asphalt waterproofing sheet, spreading the other exposed asphalt waterproofing sheet on it and connecting the joint portions. Provided is a method of constructing a double exposure waterproofing coating and sheet of a building structure comprising a third step of finishing.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 5.

Double-coated waterproofing material and sheet of the building structure according to the present invention and its construction method is exposed to the coating layer and the layer of granulated granules coated with a sunscreen having a strong adhesive strength, elasticity, elasticity to the concrete coating, resistance to concrete cracks By stacking the asphalt waterproof sheet formed of a layer, it shows an excellent waterproof effect by double waterproofing of the coating film and the sheet, and is implemented to be easily constructed.

As shown in FIGS. 2 and 3, the coating film and the sheet double exposed waterproofing material of the building structure according to the present invention are made of a quick drying asphalt compound as a main raw material, and the synthetic polymer resin adhesive and the natural mineral fiber are applied to the material. , A rubber asphalt mastic (hereinafter referred to as 'rubber asphalt') manufactured by mixing a material of petroleum resin and one of isobutylene or poly isobutylene-based synthetic resin and combined with a base surface 20 or a primer layer 30 of a building structure Coating film waterproofing material); It is composed of a sheet layer 50 coated with a rubber asphalt mixture uniformly to a predetermined thickness on both sides of the synthetic resin and a colored granule particle layer 60 coated with an ultraviolet ray material (Ultraviolet material) on the upper exposed surface, and laminated on the coating waterproofing material. Self-adhesive exposed asphalt waterproof sheet 70 is attached to the state.

In an embodiment of the present invention, the exposed asphalt waterproof sheet is a self-supporting waterproof sheet is attached to the release film to be easily peeled off from the asphalt mixture at the bottom. The release film is to prevent the surface and the corresponding surface of the waterproof sheet is bonded to each other when the waterproof sheet is wound in a roll (roll) form, and the release film when the waterproof sheet is attached to the waterproof layer After peeling off, it is constructed.

The exposed asphalt waterproof sheet may be formed by adhesively molding a polyester long fiber nonwoven fabric on the surface of the rubber asphalt mixture below. In this case, the nonwoven fabric is impregnated with the coating waterproof material, thereby the coating waterproof material and the waterproof sheet are integrated to maintain a firm adhesive force.

The coating film waterproofing layer combines the waterproofing film with the function of an adhesive for adhering the waterproof sheet and the concrete surface, and should be cured to a dry condition in a state showing elasticity within 1 hour after application.

The basic condition of the waterproof layer of rubber asphalt coating which provides waterproofing function should be applied to concrete surface to increase adhesion to concrete surface and to increase the bonding strength between concrete surface and waterproof sheet layer.

In order to meet these conditions, the quality performance standards of asphalt roof cement prescribed in the US ASTM D2823 are shown in Table 1 below.

<Table 1>

Test Items unit Standard value Remarks Water absorption % 1.0 or less    ASTM D2823 Test Standard Nonvolatile matter % 50 or more Mineral stabiligers % 5-20 Asphalt % 40 or more Mineral matter based on original mass of insoluble residue % 80 or more Heat resistance (behavior at 60 ℃) - There should be no flow or bubble. Pliability at 0 ° C - No peeling and cracking

Rubber asphalt coating waterproofing layer of the present invention for satisfying the criteria as shown in Table 1, the main material is 40 ~ 57wt% of Quick Drying Asphalt Compound, Synthetic Rubber Adhesives 15 ~ 25wt%, natural mineral fibers (Asbestos fibers, Modified Cellulose fibers) 12 ~ 16wt%, petroleum resin 5 ~ 10wt% and isobutylene or poly isobutylene synthetic resin 3 ~ 10wt% of the mixed material do.

In addition, 0.2 ~ 0.6 wt% of zinc stearate is added as a co-additive to the mixture material mixed above to enhance durability and flexibility, and 5 to 7 wt% of petroleum solvent to facilitate viscosity control, workability and dispersibility. It is prepared by adding 0.2 to 0.4 wt% of at least one material selected from other dispersants, antioxidants, and plasticizers.

The asphalt compound is cutback asphalt (Cutback Asphalt) or blown asphalt (Blown Asphalt) or a mixture of these cutback asphalt and blown asphalt, composed of 80% asphalt solids, 20% petroleum solvent (Solvent).

The synthetic polymer resin adhesive is to impart a coping force, heat resistance and adhesion to cracks, and when it is added below 15wt%, the elongation rate and adhesive strength decrease, and when it is added above 25wt%, the elongation rate becomes too large. At the same time the adhesive strength is lowered, there is a problem that the manufacturing cost increases.

The natural mineral fiber is to be mixed with the synthetic rubber adhesive to give a crack resistance and to increase the adhesive strength, when added to less than 12wt% can not obtain the adhesive strength required by the present invention When added in more than 16wt%, there is a problem that the durability is worse.

The petroleum resin is for reinforcing adhesive strength, increasing tensile strength and heat resistance, and when added to 5wt% or less, there is a problem that the tensile strength and heat resistance are lowered, and when added to 10wt% or more, the strength is too large. There is a problem that is very likely to occur cracks.

The natural mineral fiber may be made of asbestos fibers or inorganic wheelers processed with natural stone.

The rubber asphalt coating waterproofing material manufactured with the composition described above, in addition to the primer layer used in the existing asphalt sheet waterproofing method, the coating film and the adhesion function can be reliably only by applying a predetermined thickness (about 1.0 to 2.0 mm in this embodiment). As a result, it is possible to perform a complete adhesion between the inorganic concrete base surface and the organic stretch asphalt felt together with the waterproofing function of the film. In addition, the coating film waterproofing material is made of a gel, it can be easily and uniformly applied to not only the concrete base surface or primer layer, but also the wall surface using a roller or a brush. In addition, by carrying out the continuous operation of laying the exposed waterproof sheet at the same time as coating the coating waterproofing material can not only perform the construction, but also solve the problem of excessive labor cost, and the waterproofing of the worker due to the care of the construction You can prevent it.

Rubber asphalt coating waterproofing material composed of the above-described composition is a perfect adhesion between the concrete base surface and self-exposed exposed asphalt waterproof sheet by the unique strong adhesion.

In the exposed asphalt waterproof sheet, the synthetic resin is made of any one of a polypropylene woven fabric and a polyester nonwoven fabric, and the asphalt compound coated on both sides of the synthetic resin is SBS (Styrene-Butadiene-Styrene) improved asphalt compound having excellent mixing properties with asphalt. When mixed with asphalt, it is formed of APP (Atactic Polypropylene) modified asphalt compound with excellent heat resistance and weather resistance.

Unlike the general waterproof sheet, the exposed asphalt waterproof sheet has an adhesive effect by impregnating the coating waterproof material coated on the surface of the concrete matrix when the polyester nonwoven fabric is attached to the lower surface of the sheet, that is, the adhesive surface with the coating waterproof material. At the same time, it is possible to prevent the rolling phenomenon of the sheet and to prevent the fluidity of the coating waterproofing material in the gel state even during pressing concrete pouring work.

In addition, the polyester nonwoven fabric attached to the asphalt compound of the bottom surface of the exposed asphalt waterproof sheet has at least 60 g / ㎡ or more in order to easily impregnate the coating waterproofing material, excellent durability and high tensile force. The exposed asphalt waterproof sheet is used to have a thickness of at least 4mm or more, and is usually manufactured in a roll form so as to be easily spread on the coating waterproofing material.

The exposed asphalt waterproof sheet in the present invention is used to meet the quality performance criteria of the following <Table 2>.

<Table 2>

Test Items unit Quality standards The tensile strength N / cm 80 or more Elongation % More than 15 Tear strength N More than 20 Heat resistance mm 5 or more Low Temperature Flexibility (-5 ℃) - No crack and peeling phenomenon

 Referring to the construction method using the asphalt bitumen-based waterproof film and the waterproof sheet configured as described above with reference to the waterproof construction of the floor shown in Figures 4 and 5 as follows.

4 is a detailed construction drawing at the time of new construction, and FIG. 5 is a detailed construction drawing at the time of repair work.

First, in the new construction, the concrete matrix surface (slab) to be waterproofed as shown in Figure 4 to clean and flatten. At this time, it is preferable to treat the wires or nails so as not to protrude, and the uneven parts are flattened with iron trowels or after the pus mortar is applied, the soil, dust, sand, etc. are cleaned cleanly. In addition, after coating and reinforcing the film waterproofing material with a thickness of 2 to 3 mm on the fragile areas where water-proof defects such as concrete pouring seams, drains, floors and wall edges, corners, and pipe joints are easily generated, asphalt primer (0.4 L / m 2), and the primary coating waterproofing material is applied to a thickness of about 2 mm.

Here, the primer coating process may be omitted because the primary coating waterproofing material (asphalt mastic; coating film) is applied to the bottom surface in a liquid or gel form and adheres firmly.

The first coating waterproof layer is evenly applied to the thickness of about 2mm from the lower place to the high place using the toothed trowel as the width of the waterproof sheet.

And, by spreading the exposed waterproof sheet rolled in a roll shape on the first coating film waterproofing material, by pressing lightly with a roller, the waterproofing material and the waterproof sheet can be doubled to maximize the waterproofness, and also the waterproof sheet Since the finishing work can be performed only by covering the waterproof layer, the waterproof construction process can be simplified.

Next, the connection part (seam) between the exposed waterproof sheets is first coated with a 1 ~ 2mm thickness of the secondary coating waterproofing material (asphalt mastic; reinforcing) on the end side of the waterproof sheet, and then exposed and waterproofed thereon. Gently press down on the rollers while overlapping the sheets to bond the lower and upper sheets. The secondary coating waterproofing material is made of the same components as the primary coating waterproofing material.

After performing the process, water or moisture is applied to the joint portion by reinforcing and applying the third asphalt mastic by using a trowel as much as 1 to 2 mm in the left and right width of the joint at the joint end portion where the waterproof sheet is overlapped. Prevent it from penetrating.

Complete the waterproof construction by applying the coating waterproofing material and laying the exposed waterproof sheet as described above.

In the waterproof construction process, the secondary and tertiary asphalt mastic for seam reinforcement uses a curable asphalt mastic which is completely cured after 4 to 5 hours.

The present invention constructed and constructed as described above can be applied to the external waterproofing of all structures requiring waterproofing, such as a rooftop of a building structure, an underground parking lot slab, and the like, as in the following embodiments.

As shown in FIG. 5, the repair work is carried out by arranging the base surface of the pressed concrete formed on the existing waterproof layer and then performing the same construction as in FIG.

On the other hand, in the case of vertical wall waterproofing construction, it is the same as the case of the above-described waterproof floor construction. Particularly, the edges of the floor and the wall attach the bottom waterproof sheet about 10cm to the vertical wall surface, and the waterproof sheet down from the vertical wall attach about 10cm to the floor surface so that they overlap in two layers.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

As described above, according to the present invention, the following effects are realized.

First, it is possible to secure safety and reliability of waterproofing with excellent watertightness by forming a double waterproof layer by the exposed asphalt waterproof sheet composed of the exposed surface of rubber asphalt coating waterproofing material and colored granule particle layer having both asphalt coating and adhesive function. Excellent responsiveness to behavior, chemical resistance, durability and weather resistance.

Second, as a room temperature construction method, vertical wall construction is possible, there is no risk of material handling and transportation work, and the workability is good and continuous finish by the room temperature application of rubber asphalt coating waterproofing material and continuous work of exposed asphalt waterproof sheet. The process can be omitted.

Third, due to the strong adhesion of the rubber asphalt coating waterproofing material, by forming a rubber asphalt coating layer that can completely adhere the concrete surface and the exposed asphalt waterproof sheet without lifting or peeling from the concrete ground surface. Water leaks under the waterproofing layer cannot flow even when water-resistant defects occur. Therefore, defects are easily found and partial repair work is easy.

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Claims (9)

Quick Drying Asphalt Compound is used as the main raw material, and is manufactured by mixing one of synthetic polymer resin adhesive, natural mineral fiber, petroleum resin and isobutylene or poly isobutylene synthetic resin with the material, and building structure Rubber asphalt coating waterproofing layer bonded to the base surface or the primer layer; And The exposed asphalt waterproof sheet layer coated on the waterproof layer of the coating layer and coated with rubber asphalt mixture on both sides of the synthetic resin and coated with granulated granules coated with an ultraviolet ray material (Ultraviolet material) on the upper exposed surface. Double exposure waterproofing material and sheet of the building structure comprising a. The method of claim 1, The rubber asphalt coating waterproof layer Quick Drying Asphalt Compound 40 ~ 57wt% is the main raw material, the synthetic polymer resin adhesive 15-25wt%, natural mineral fiber 12-16wt%, petroleum resin 5-10wt% and isobutylene or poly 3 to 10 wt% of one of the isobutylene synthetic resins is mixed, and 0.2 to 0.6 wt% of zinc stearate and 5 to 7 wt% of a petroleum solvent are included as auxiliary additives to 100 wt% of the mixture, and a dispersant, antioxidant, and plasticizer Rubber asphalt coating film and sheet double exposure waterproofing material, characterized in that manufactured by adding at least one selected from 0.2 to 0.4wt. The method according to claim 1 or 2, The exposed asphalt waterproof sheet is a rubber asphalt coating and sheet double exposure waterproof material, characterized in that the lower surface is further provided with a polyester non-woven fabric. A quick-drying asphalt compound (Quick Drying Asphalt Compound) as a main raw material, a coating film waterproofing material prepared by mixing a material of synthetic polymer resin adhesive, natural mineral fiber, petroleum resin and isobutylene or poly isobutylene synthetic resin to the material A first step of applying to the surface of the mother body to be constructed; Roll-shaped self-adhesive exposed asphalt waterproof sheet produced by applying a rubber asphalt mixture on both sides of the resin, a release film on the lower surface, and colored granules coated with an ultraviolet ray material on the upper exposed surface. A second step of spreading the adhesive on the coating waterproofing material; And The secondary coating waterproofing material made of the same width as the primary coating waterproofing material is applied to one end of the exposed asphalt waterproofing sheet by a predetermined width, and the other self-exposed exposed asphalt waterproofing sheet is overlapped thereon to connect the joint portions. Steps to make and close Double exposure waterproof construction method of the coating and sheet of the building structure comprising a. The method of claim 4, wherein The first step of applying a coating waterproofing material to the mother surface First step to clean the matrix surface: A second process of flattening the mother surface; And The third process of reinforcing the waterproof layer by applying a coating waterproofing material to the fragile areas where waterproof defects such as concrete pouring seams, drains, floors and wall edges, corners, and pipe joints are likely to occur. Double exposure waterproof construction method for coating and sheet of the building structure comprising a. The method according to claim 4 or 5, And a fourth step of applying a primer before applying the asphalt mastic to the mother surface of the first step. The method according to claim 4 or 5, And a sixth step of applying a third thickness waterproofing material with a predetermined width to the left and right sides of the joint ends of the joint part after overlapping the waterproof sheet and connecting the joint part. Coating and sheet double exposure waterproof construction method. The method of claim 4, wherein The primary coating waterproofing material is coated with a coating waterproofing material that is maintained in a gel state, and the secondary and tertiary asphalt mastics are double exposed waterproof construction of the coating structure and sheet of a building structure coated with a curable coating waterproofing material that is cured after 4 to 5 hours. Way.  The method of claim 1, The exposed asphalt waterproof sheet has a rubber asphalt mixture of its lower surface has an adhesive performance, The release film is attached to the lower surface of the exposed asphalt waterproof sheet, the coating film and sheet double exposure waterproofing material of the building structure, characterized in that the release film is removed when adhering with the rubber asphalt waterproofing layer.

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