The present invention relates to a composite sheet waterproofing reinforcement method, and more particularly, providing waterproofing and surface reinforcement in various types of roofs and building structures, including slab roofs, while reducing the number of coatings and implementing an effective waterproofing insulation function to reduce heating and cooling costs It relates to an improved composite sheet waterproofing reinforcement method that contributes to saving and achieves longer lifespan.
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