Yuyang Engineering Co., Ltd. specializes in various waterproofing projects, with construction items including exterior walls, roofs, bathrooms and toilets, basement diaphragm walls, window frames, efflorescence (wall cancer), silicone repair for building exterior wall window frames, sheet metal heat insulation, and roof heat insulation. Exterior wall workers hold rope access licenses, ensuring employee safety and giving employers peace of mind. Through the understanding of materials accumulated from long-term construction experience, in fact, commonly used PU (polyurethane) is not suitable for application on roofs with direct sunlight exposure, as it will undergo hydrolysis and degradation. Different materials have different applicable areas; inquiries are welcome. The company also sells waterproofing materials for DIY customers to apply themselves, and provides construction methods.