Plastic Compound Dimpled Drainage Sheet Waterproof HDPE Drain Board​

Plastic Dimpled Drainage Board/Compound Dimple Waterproof HDPE Drain Board​ Introduction: Green roof drainage board with a special plastic sheet extrusion process will be closed to the protruding cylinder shell to form a bump-like membrane, shell continuous, with a high degree of three-dimensional space and some supports, can resist the long-term high-pressure, no deformation. Shell top cover geotextile filter layer, to ensure that the drainage channel will not be blocked by