The present invention relates to a waterproof construction method, and more specifically, by using a fixing means, a styrofoam board, and a waterproofing agent on exposed parts such as a roof of a building, the waterproofing ability is excellent and the waterproof surface can be treated flatly to drainage treatment. It relates to a rooftop waterproof construction method using easy styrofoam board and waterproofing agent.;The present invention was devised to solve such a problem, and an object of the present invention is to fix a styrofoam board with a plurality of fixing means on exposed parts such as a roof of a building, and an appropriate amount on the surface of the swiro and the roof using a waterproof agent. Sprinkler foam board that prevents water clogging from occurring on the roof by spraying the coating and flattening the coated surface to prevent separation of the waterproof coated surface from the floor surface. It is to provide a rooftop waterproof construction method using and waterproofing agent.;The manufacturing method of the present invention for achieving the above object, the process of arranging the styrofoam boards having a predetermined size on the entire rooftop floor surface at regular intervals on the roof of the building, the floor using the fixing means for the styrofoam board It is a process of fixing the surface firmly, and spraying the waterproofing agent on the bottom surface and styrofoam board to flatten the coated surface.;Here, after placing the Styrofoam board with a certain size on the entire rooftop surface at a predetermined interval from each other, the cross-shaped fixture 40 is installed between the Styrofoam boards, and a waterproofing agent may be applied to flatten the coated surface to perform rooftop waterproofing.
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