KR100732473B1 - Water-proofing method for urathane flim of paint using zinc galvanizing sheets - Google Patents

Abstract

An urethane coating and waterproofing method using galvanized steel sheets is provided to increase an environment-friendly effect, waterproofing effect and durability by covering a structure with a galvanized steel sheet and coating/waterproofing with urethane. The urethane coating and waterproofing method using galvanized steel sheets comprises the steps of arranging concrete layers(1) of the bottom or the vertical wall of the existing rooftop, applying high rigid urethane primer(3) on the surface of the arranged concrete layers of the bottom or the vertical wall to the appointed thickness, applying urethane putty(4) on the cracks and the corners, attaching polyethylene based insulating materials(5) having the appointed thickness(t1), attaching a galvanized steel sheet(6) as a hard steel sheet having the appointed thickness and coated with corrosion-resistant chlorinated rubber(61) on the top of the urethane primer and urethane putty coated layer using a double-sided tape(62) and fixing the partially overlapped part of the galvanized steel sheet using a concrete nail(63), applying polyurethane 2-liquid sealants(8) on the top of the urethane putty to the appointed thickness and width, applying polyurethane elastic hard intermediate lacquers(9,10) on the top of the galvanized steel sheet and the polyurethane 2-liquid sealants to the appointed thickness, and applying a top coating(11) on the top of the polyurethane elastic hard intermediate lacquers to the appointed thickness.

Description

Water-proofing method for urathane flim of paint using zinc galvanizing sheets}

1 is a side cross-sectional view of a rooftop bottom waterproofed by the method of the present invention.

2 is a partial plan view of a roof top surface waterproofed by the method of the present invention.

3 is a side cross-sectional view of a rooftop vertical wall waterproofed by the method of the present invention.

Figure 4 is a process chart for explaining a waterproof method of the vertical roof of the roof of the present invention.

Figure 5 is a process chart for explaining the waterproofing method of the roof bottom surface of the present invention.

Explanation of symbols on the main parts of the drawings

1: floor concrete floor 2: vertical wall concrete floor

3,7 urethane primer 4,71,72 urethane putty

5: polyethylene insulation material 6: galvanized sheet

8: Polyurethane 2 component sealant 9,10: Polyurethane elastic hard intermediate reki

11: top coating 12: storm drain

61: corrosion resistant rubber chloride 62: double sided tape

63: concrete nail 64: joint adhesive tape

The present invention relates to a waterproofing method of urethane coating using a galvanized sheet, more specifically, by applying a method of waterproofing the coating with urethane after covering the galvanized sheet on the structure, less noise and dust generated during the existing ground treatment and take out. Environmental factors are good due to less waste, and it combines the advantages of sheet waterproofing and urethane waterproofing for excellent waterproofing (i.e., good waterproofing effect), and the use of galvanized sheet can greatly improve durability compared to existing urethane waterproofing. Invented.

In general, the cause of leakage on the roof of a concrete building is that the waterproofing layer is damaged or the waterproofing layer is aging due to the cracking and behavior caused by the defect of the structure, and the watertight layer is lifted up, causing water to flow between the waterproofing layer and the flooring surface. Diffusion movement, leaks through structural defects, can occur.

These leaks are a natural occurrence over time, requiring periodic waterproof repair, as well as providing a variety of waterproof materials and methods.

During the repair, the non-exposed method removes the damaged waterproof layer and the protective concrete layer to reconstruct the new waterproof layer and the protective concrete layer, and the exposed method removes the protective concrete layer and reconstructs it to cure, then completely dry the floor. The primer is applied by arranging the bottom surface such as removing the latency of the film, and a coating waterproofing agent is used on the top.

The methods can increase the damage of the existing structure by removing the waterproof layer and the protective concrete layer, causing environmental pollution, such as noise and a large amount of waste during construction, there is a problem that the construction period is long and expensive.

As a method to solve this problem, an exposed waterproof method is used to clean the bottom surface without removing the existing waterproof layer and protective concrete layer, and then apply a primer and directly form a polyurethane waterproof layer thereon.

However, the exposed waterproof method is a ground condition and defects in the construction method, damage to the waterproof layer due to the behavior and fatigue of the concrete and aging of the waterproofing agent and moisture from the concrete surface and the attached structure during the post-construction period This causes bubbles and partial lifting to cause leakage.

In addition, a method using a pad or a nonwoven fabric as a reinforcing agent (for example, Korean Patent Publication No. 10-576102) has been provided, but such a construction method is complicated in construction, weak in impact, and insufficient thermal insulation function.

In addition, Korean Patent Laid-Open Publication No. 10-2006-80833 has recently been proposed as a thermal insulation waterproof structure and construction method for defect repair of rooftop waterproofing, which is without removing the existing waterproof layer and the protective concrete layer or the existing exposed waterproof layer. After arranging, the primer layer, rubber chip waterproofing layer, polyurethane waterproofing layer and top coating layer are sequentially applied.

However, the insulating waterproof structure and its construction method are also cracking of the rubber chip waterproof layer, polyurethane waterproof layer and top coating layer due to the cracking of the structure, and between the concrete layer and the rubber chip waterproof layer and between the rubber chip waterproof layer and polyurethane There is a problem in that moisture is generated between the waterproof layer and the adhesive surface of the polyurethane waterproof layer and the top coating layer, so that adhesion between them is not perfect and bubbles and partial lifting phenomenon appear.

On the other hand, as a way to solve the above problems, the coating film waterproofing method using a hard sheet has been developed and the Korean Patent Publication No. 10-0271421 has been proposed, which is the base layer of the building and the surface of the corner portion raised In the waterproofing method in which the coating film waterproofing material is applied or the soft sheet is bonded, a moisture-proof cloth is laid on the surface of the base layer, and a metal hard sheet cut to the unit standard is placed on the upper layer so that the joints of the respective hard sheets can be joined together. The non-woven fabric is laid on the surface of the joint, and the tape is taped on the surface of the joint, and then a conventional coating waterproof is applied to the surface of the hard sheet and the tape to form a waterproof coating layer. However, if necessary, the joint of the rigid sheet is fixed. It penetrates and fixes to a base layer with a nail, and the heat insulating material was laminated | stacked between the moisture proof fabric and a hard sheet | seat.

However, this waterproof method not only has a form in which a moisture-proof cloth, a hard sheet, and a coating waterproof layer are sequentially applied and laminated on the floor of a building, but also simply installs a non-woven fabric on the joint of the hard sheet, and then tapes the surface. Since the coating film waterproof layer is formed by coating and hardening ordinary coating waterproofing material on the surface of the sheet and the tape, the thickness of the coating layer on the top of the hard sheet is very thin, so durability is weak, and when a defect occurs, the sheet is overlaid. Maintenance is required, and in particular, by using the hard sheet itself as it is, the surface directly contacting the bottom layer or the heat insulator is corroded by moisture or the like, and thus has a very short lifespan.

The present invention has been made to solve such a conventional problem, by coating the galvanized sheet on the structure and then waterproofing the coating film with urethane, less noise and dust generation and less waste waste than the existing ground treatment, environmentally friendly By combining the advantages of sheet waterproofing and urethane waterproofing, the waterproofing effect can be enhanced, and the use of galvanized sheet provides urethane coating waterproofing method using zinc-plated sheet that can greatly improve durability than the existing urethane waterproofing. Its purpose is to.

Waterproofing method of the present invention for achieving the above object, the step of arranging and plastering the existing floor surface or vertical wall concrete layer; Applying a urethane primer to a predetermined thickness of the existing floor surface or the vertical wall concrete layer in a predetermined thickness to waterproof the coating film; Applying a urethane putty to cracks and corners; Attaching a galvanized sheet using a double-sided tape with a hard metal sheet coated with a rubber chloride on the bottom surface with a predetermined thickness, but attaching portions of the galvanized sheets in contact with each other; Attaching a joint adhesive tape made of a nonwoven fabric to an upper surface of a joint part of the galvanized sheet and applying a urethane putty on the upper surface of the galvanized sheet twice; Applying a polyurethane two-component sealant to the upper surface of the urethane putty by a predetermined number of times to have a predetermined thickness and width; Applying a polyurethane elastic hard midway reki to the galvanized sheet and the polyurethane two-component sealant upper surface portion one or two times by a predetermined thickness and number of times; Characterized in that it comprises a step of applying a top coating to a predetermined thickness on the upper surface portion of the polyurethane elastic hard middle reiki.

At this time, when the object to be waterproofed is a rooftop concrete layer on the roof, urethane putty is applied to the cracks and edges, and then a polyethylene plating insulation material having a predetermined thickness is further subjected to zinc plating on the upper surface of the insulation. The sheet is attached by double-sided tape.

In addition, the process of arranging and plastering the floor concrete layer is to remove the vulnerable part or the excited part by corrosion, and after reinforcing the part with the polymer non-contraction high flow mortar, etc., using a grinder or the like. Completely remove the aged skin, reinforce and repair cracked areas and seams around the drainage, and wake up the area around the rainwater drain with a hammer drill, drain the water accumulated on the waterproofing layer, and finish it with water by pressing mortar. The rainwater drain is characterized by consisting of a process for installing the rainwater pipe again after the special waterproof treatment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a side cross-sectional view of a rooftop floor surface waterproofed by the method of the invention, and FIG. 2 shows a partial plan view of a rooftop floor surface waterproofed by the method of the invention, and FIG. 4 is a side cross-sectional view of a rooftop vertical wall waterproofed by the present invention. FIG. 4 is a flowchart illustrating a waterproofing method of the rooftop vertical wall of the present invention, and FIG. 5 illustrates a waterproofing method of the rooftop floor surface of the present invention. It shows a process chart for.

According to the present invention, the waterproofing method, a step (S1) of arranging and plastering the existing floor surface or vertical wall concrete layer (1) (2);

A step (S2) of applying a high-strength urethane primer (3) to a predetermined thickness on the surface of the existing existing floor surface or vertical wall concrete layer (1) (2);

Applying a urethane putty (4) to cracks and corners (S3);

The zinc plated sheet 6 is a double-sided tape having a predetermined thickness (t2) on the upper surface of the urethane primer (3) and the urethane putty (4) coating layer and a hard metal sheet coated with a corrosion-resistant rubber chloride (61). Attaching using (62), but the part of the galvanized sheet (6) abuts to each other so as to overlap the part fixed to the concrete nail (63) (S5);

Attaching a joint adhesive tape 64 made of non-woven fabric to the joint of the galvanized sheet 6 and applying urethane putty 71 and 72 to the upper surface of the adhesive tape 64 twice (S6); ;

Applying a polyurethane two-component sealant (8) on the upper surface of the urethane putty (72) by a predetermined number of times to have a predetermined thickness and width (S7);

The process of applying the polyurethane elastic hard midway reki (9) (10) to the upper surface of the galvanized sheet (6) and the polyurethane two-component sealant (8) over a first and second by a predetermined thickness and the number of times (S8, S9);

Characterized in that it comprises a step (S10) to finish by the top coating 11 to a predetermined thickness on the upper surface portion of the polyurethane elastic hard midway reki (9) (10).

In this case, when the object to be waterproofed in the present invention is a rooftop concrete layer (1), the polyethylene having a predetermined thickness (t1) after the step (S3) of applying the urethane putty (4) to the cracks and corners After the step (S4) of attaching the system insulator 5 is further performed, the zinc plated sheet 6 is attached to the upper surface of the insulator 5 by the double-sided tape 62 (S5).

On the other hand, the process of cleaning and plastering the floor concrete layer (1) of the existing rooftop or vertical wall concrete layer (1) (2) to clean up and plastering process, the corrosion or vulnerable parts or The exfoliated part is removed, and the plastered part is reinforced with polymer non-shrinkage high flow mortar, etc., and then the aged skin is completely removed using a grinding machine, and the cracked part and the surrounding area are reinforced and repaired. After draining water around the rainwater drain 12 with a hammer drill, the water is finished on the waterproofing layer and finished with plastering while giving water with a pressing mortar. The rainwater drain 12 is specially waterproofed and then installs rainwater pipe again. Characterized in that the process.

In the above, the parts leaked by the cracks are waterproofed by the injection grouting wet construction at 8-12 cm intervals around the cracks.

In addition, after draining the bottom 30cm around the rainwater drain 12, the liquid waterproofing is pressed twice, and after the mortar treatment is waterproofed, the inside of the rainwater drain and roll the galvanized sheet to a depth of 30cm and the bottom surface and The 2cm overlapping construction prevents water from entering, and then the air vent is perforated over the sheet waterproof layer and installed in a 30mm T-shape of stainless pipe. After installation, the periphery is finished with polyurethane sealant.

In addition, the urethane primer (3) coating step (S2), after finishing the grounding of the floor or vertical wall concrete layer (1) (2) completely dried (water content of 8% or less), using a roller 0.3 ~ 0.5 It is applied to the kg / ㎡, if necessary, depending on the ground state of the concrete layer, the number of coating is characterized in that it is applied once or twice.

In addition, the thickness of the polyethylene-based heat insulating material (5) to be attached before fixing the galvanized sheet 6, which is a hard metal sheet on the floor is characterized in that 3T.

On the other hand, the overlapping width of the portion where the galvanized sheet 6 abuts each other is characterized in that 100mm.

In addition, the polyurethane two-component sealant 8 is characterized in that it is constructed twice so that the width and thickness are 15 mm and 3 mm, respectively.

 In addition, the polyurethane elastic hard midway reki (9) (10) is formulated in the order of high rigid urethane base, hardener according to the mixing ratio prescribed in the round bottom container, and added 5-10% of the designated thinner for adjusting the viscosity After the viscosity ratio is 60% or more, the mixture is formed by stirring for about 5 minutes while being careful not to generate bubbles with the stirrer.

At this time, the polyurethane elastic hard midway reki (9, 10) to be carried out over the first and second is different depending on the position to be waterproofed, in the case of a vertical wall using a roller or the like to 0.3mm primer coating thickness After the first coating (S8) with the target, the middle coating thickness is applied to the target with a thickness of 0.3mm or more in the same way (S9) to have an average thickness of 0.6mm. After applying the primary coating film thickness (0.5mm) to the primary coating (S8) to harden, cut out the bubble and reinforce the fragile part, and apply the secondary coating (S9) to the middle coating thickness of 2.5mm or more in the same way. It is characterized in that the construction to have an average thickness of 3.0mm.

In addition, the coating thickness of the top coating 11 layer, which is the finishing work, is characterized in that the construction to 0.5mm.

Referring to the effect of the waterproof method of the present invention made of such a process as follows.

First, in the present invention, in order to clean up and plaster (S1) the bottom and vertical walls of the existing rooftop and vertical wall concrete layers (1) and (2) like the existing waterproofing method, the existing concrete layer (1) ( 2) Remove the vulnerable or excited parts that have already been corroded, and make reinforcement by plastering with polymer non-condensed high flow mortar, etc., and then completely remove the aged skin by using a grinder, etc. Reinforce and repair the periphery of the seam, but in the case of the concrete layer (1) of the bottom surface, break the periphery with a hammer drill and drain the accumulated water on the waterproof layer, and then finish the plastering by pouring it with pressing mortar. After the special waterproof treatment, the rainwater pipe is installed again, and the wastes generated in the floor cleaning process are put out in bags and cleaned.

Thereafter, the existing floor and vertical wall concrete layers (1) (2) arranged as described above are completely dried to have a water content of 8% or less, and then the surfaces of the floor and vertical wall concrete layers (1) (2) High rigid urethane primer (3) is applied to a certain thickness (S2) to the coating film waterproof treatment, wherein the waterproof layer of the urethane primer (3) is applied using a roller to be 0.3 ~ 0.5㎏ / ㎡, but the bottom surface In the case of, in accordance with the state it is preferable to perform the coating number of 1 to 2 times more.

In this way, even if the high-strength urethane primer (3) is applied to a certain thickness after cleaning the foundation concrete layer on the roof floor and the vertical wall, the cracks and the cracks are formed. Since there is a risk of leakage through such cracks and corners by applying a urethane putty (4) once more to achieve a perfect waterproof (S3).

Since the vertical wall of the roof is not related to heat insulation, the galvanized sheet 6 may be directly attached to the upper surface of the urethane primer 3 and the urethane putty 4, but in the case of the roof surface, In order to prevent heat transfer, it is preferable to attach and install the polyethylene-based heat insulating material 5 having a thickness t1 of 3T by using the double-sided tape 62 (S4).

Subsequently, the upper surface of the urethane primer 3 and the urethane putty 4 or the upper surface of the heat insulating material 5 has a thickness t2 of 0.5T as a hard metal sheet, and the bottom surface is coated with a corrosion resistant rubber chloride 61. The galvanized sheet 6 is attached using a double-sided tape 62. At this time, the portions of the galvanized sheet 6 contacted with each other are approximately 100 mm overlapped and the overlapped portions are concrete nails 63. Using a fixed to the roof surface or vertical wall concrete layer (1) (2) using (S5).

When the installation and fixing of the galvanized sheet 6 is completed as described above, a joint adhesive tape 64 made of a nonwoven fabric is attached to the joint of the galvanized sheet 6, and the joint adhesive tape 64 and the galvanized sheet are attached. (6) urethane putty (71, 72) was applied to the upper surface of the joint adhesive tape (64) for two times (S6), and then to the upper surface of the urethane butter (72) to the undercoat layer The polyurethane two-component sealant 8 is applied twice with a width of 15 mm and a thickness of 3 mm (S7).

Subsequently, the polyurethane-elastic hard mid-range reki (9) 10 is applied to the upper surface of the zinc-plated sheet 6 and the polyurethane two-component sealant 8 in a middle layer for a predetermined thickness and number of times. S8, S9), wherein the polyurethane elastic hard intermediate reki (9) (10) is formulated in the order of high-hard urethane base, hardener according to the mixing ratio prescribed in the round bottom container, and the designated thinner for adjusting the viscosity After adding 5-10% and making a viscosity ratio 60% or more, it forms by stirring for about 5 minutes, surrounding it so that an air bubble will not arise with a stirrer.

The polyurethane elastic hard midway reki (9, 10) formed in this way is different from each other depending on the position to be waterproofed, for example, in the case of a vertical wall of the roof, such as a wall or a paravet, using a roller or the like primer coating film After the primary coating (S8) to the target thickness of 0.3mm (S8) in the same way to the secondary coating (S9) to the intermediate coating film thickness of 0.3mm or more target to be constructed to have an average thickness of 0.6mm.

In the case of the rooftop surface, use a roller or a dedicated scoop for the first time to apply a primer coating thickness of 0.5 mm (S8), and harden it for about 20 hours, and then cut off the bubble on the coated surface with a knife or the like. After reinforcing and trimming the fragile parts, it is preferable to apply the secondary coating (S9) to a thickness of 2.5 mm or more in the same way to have an average thickness of 3.0 mm.

In this way, when the coating step (S8, S9) of the polyurethane elastic hard middle reiki (9) 10, which becomes two intermediate layers, is completed, the top coat is formed on the upper surface of the polyurethane elastic hard middle reiki (9) (10). When the top coating 11 is applied to the layer with a thickness of 0.5 mm (S10) and then cured, all the waterproofing processes are completed.

In this way, when the galvanized sheet is coated on the upper and front surfaces of the rooftop or vertical wall concrete layer, and the coating is waterproofed with urethane, less noise and dust are generated and less carry-out waste than conventional ground treatment. Environmentally friendly, by combining the advantages of the waterproof sheet and the urethane waterproof can improve the waterproof effect, and by using a galvanized sheet can be significantly improved durability than the existing urethane waterproof.

In particular, the joint adhesive tape 64 is attached to the joint of the galvanized sheet, and the urethane putty (71, 72) is applied to the upper portion of the galvanized sheet as well as the polyurethane two-component sealant (8) twice. After the coating, the polyurethane sheet (6) and the polyurethane two-component sealant (8) were applied to the upper surface of the polyurethane elastic hard mid-range reki (9) (10) in two steps, followed by top coating. Compared with the conventional waterproofing method, the waterproof performance is very good at the joints of the galvanized sheet as well as the upper waterproof layer itself is made of the lower, middle, and top layers, which greatly improves durability, thereby obtaining a perfect waterproof effect.

On the other hand, when the specification or purpose of use for the polyurethane hard coating waterproofing materials used in the present invention are displayed in a table as follows.

division standard Remarks Polyurethane high rigid Waterproof coating Midway Polyurethane primer Waterproof coating Hado Polyurethane top coating Waterproof coating normal course Non-woven Rooftop Fiber System Bubble prevention Floor repair plasterer Mortar adhesive Plaster for plaster Polyurethane sealant For crack boss 2-component putty Pecker 5-7CM Water leaking part Polyurethane 2-component Sealing Grouting Waterproofing Liquid Water leaking part

Although the above-described embodiments have been described with respect to the most preferred embodiments of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications can be made without departing from the technical spirit of the present invention.

As described above, according to the urethane coating waterproofing method using the galvanized sheet of the present invention, by coating the galvanized sheet on the roof structure and waterproofing the coating film with urethane, the generation of noise and dust less than the conventional ground treatment, and take out It is a very useful invention that it is environmentally friendly due to less waste, and it can greatly enhance the waterproofing effect by combining the advantages of waterproofing sheet and urethane waterproofing, and it can greatly enhance durability than the existing urethane waterproofing by using galvanized sheet. .

Claims (13)

Arranging and plastering the roof floor or vertical wall concrete layer; Applying a hard urethane primer to the surface of the cleaned floor or vertical wall concrete layer to perform waterproofing of the coating film; Applying a urethane putty to cracks and corners; Attaching a galvanized sheet using a double-sided tape to an upper surface of the urethane primer and urethane putty coating layer, and fixing the concrete nails by overlapping a portion where the galvanized sheets contact each other; Attaching a joint adhesive tape made of non-woven fabric to the joint of the galvanized sheet, and applying urethane putty on the upper surface of the adhesive tape in a secondary manner; Applying a polyurethane two-component sealant to an upper surface of the urethane putty; Applying a polyurethane-elastic hard intermediate reki to the galvanized sheet and the polyurethane two-component sealant on the upper and second stages; Urethane coating film waterproof method using a galvanized sheet, characterized in that consisting of ;; The method according to claim 1, If the object to be waterproofed is a floor concrete layer on the rooftop, the urethane putty is applied to the cracks and corners, and then the polyethylene-based heat insulating material is further attached to the upper surface of the heat insulating material. Urethane coating waterproofing method using a galvanized sheet, characterized in that attached. The method according to claim 1, In the case of the floor concrete layer, when the floor floor concrete layer is cleaned and plastered when the existing floor surface or vertical wall concrete layer is cleaned, the polymer non-condensed high flow is removed in such a removed area. After reinforcement with mortar, use the grinding machine to completely remove the aged skin, reinforce and repair cracked areas and seams, and drain water around the rainwater drain with a hammer drill. Plastering the finish while giving a seal with a pressing mortar, the rainwater drain is a urethane coating waterproofing method using a galvanized sheet, characterized in that made of a process of installing a rainwater pipe again after a special waterproof treatment. The method according to claim 3, Water leakage by crack is urethane coating waterproofing method using galvanized sheet which is waterproofed by injection grouting with 8-12cm intervals around cracks. The method according to claim 3, After draining the bottom of the rainwater drainage 30cm, press the liquid waterproofing twice, and then apply a mortar and waterproofing process.Inside the rainwater drainage, roll the galvanized sheet to a depth of 30cm and overlap the bottom surface with 2cm. After preventing the water from entering, the air vent is perforated over the sheet waterproofing layer and is installed in a 30mm T-shape of stainless pipe, and after installation, the periphery of the urethane coating film using a galvanized sheet is characterized by finishing with a polyurethane sealant. The method according to claim 1, In the initial urethane primer coating process, after finishing the grounding of the floor or vertical wall concrete layer and completely drying (water content below 8%), apply 0.3 ~ 0.5㎏ / ㎡ using roller, but if necessary, Urethane coating waterproofing method using a galvanized sheet, characterized in that the coating is applied once or twice depending on the state. The method according to claim 2, The thickness (t1) of the polyethylene-based insulation to be attached before fixing the galvanized sheet on the floor is a urethane coating waterproofing method using a galvanized sheet, characterized in that 3T. The method according to claim 1, The thickness (t2) of the galvanized sheet is 0.5T, the bottom surface thereof is coated with corrosion-resistant rubber chloride, and the overlapping width of the areas where the galvanized sheet is in contact with each other using a galvanized sheet, characterized in that Urethane coating waterproofing method. The method according to claim 1, The polyurethane two-component sealant is a urethane coating film waterproofing method using a galvanized sheet, characterized in that the construction twice to the thickness 15mm 3mm. The method according to claim 1, The polyurethane elastic hard intermediate reki is formulated in the order of high rigid urethane base and hardener according to the mixing ratio prescribed in the round bottom container, and adds 5-10% of the designated thinner to adjust the viscosity so that the viscosity ratio is 60% or more. After that, the urethane coating film waterproofing method using a galvanized sheet, characterized in that the stirring was formed for about 5 minutes while being careful not to bubble. The method according to claim 1, When the object to be waterproofed is the vertical wall of the roof, the polyurethane elastic hard mid-reki is applied to the primer coating thickness with a target of 0.3 mm by using a roller first, and then the secondary coating with a thickness of 0.3 mm by the same method. Urethane coating waterproofing method using a galvanized sheet, characterized in that the coating is applied to have an average thickness of 0.6mm. The method according to claim 1, When the object to be waterproof is the roof top surface, the polyurethane elastic hard middle reki is hardened by cutting off the bubble where it has been formed after first applying the primer coating thickness to a target of 0.5mm using a roller or a dedicated squeegee and curing it. The urethane coating waterproofing method using a galvanized sheet, characterized in that the reinforcement and trimming of the parts, and then applied to the middle coating film thickness 2.5mm target in the same way to have an average 3.0mm thickness. The method according to claim 1, The coating layer thickness of the top coating layer is a urethane coating film waterproof method using a galvanized sheet, characterized in that the construction.

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