"Kaihua" designed for high strength roof insulation, acoustic noise and fire safety features flat-top roof systems (especially flexible waterproof roof system) tailored. It has excellent resistance to compression, high load and aging and weathering properties. Not only fully capable of carrying workers to move around in the construction, maintenance and upkeep period, but also to ensure that the roof system has long-lasting, stable, thermal insulation, noise reduction features to attract.