... 3. Used in green roof project. HDPE Green Roof Drainage Sheet Description:HDPE green roof drainage sheet with a special ... or concrete backfill. Main Technical Indicators of HDPE Green Roof Drainage SheetFeatures:1. Strong tensile strength, high elongation ... force, etc.Typical Application:1. Green Engineering: garage roof greening, roof garden, roof garden, soccer fields, golf courses, beach project.2 ...