Plastic drainage board are made of polystyrene (HIPS) or polyethylene (HDPE) as raw materials. In the production process, the plastic sheet is stamped to form a hollow platform. In this way, a drainage board is made.
It is also called concave-convex drainage plate, drainage protection plate, garage roof drainage plate, drainage plate, etc. It is mainly used for drainage and storage of the concrete protective layer on the garage roof. So as to ensure that the excess water on the roof of the garage can be discharged after backfilling. It can also be used for tunnel drainage.