10~30mm Dimple Height Roof Garden Drainage Board for Other Earthwork Product Drainage Board Price Product Description The plastic drainage board is made of polystyrene (HIPS) or polyethylene (HDPE) as raw materials. The plastic bottom plate is stamped into the convex points (or hollow cylindrical porous) of conical protrusions or stiffeners. After continuous innovation and research, the raw materials have been greatly improved and changed. Now it is pressed with polyvinyl chloride (PVC) as raw materials. The compressive strength and overall flatness have been greatly improved, with a width of 1 ~ 3M, The length is 4 ~ 10 meters or more. Dimple HDPE geomembrane is made of high molecular, produced by extrusion and adsorption. The tri-dimensional space can drain gas and fluid. It is a multi-functional material, can form channels for water and gas easily, which is sound insulation and vibration isolation. In the field of civil construction can be widely used in building roof system layer overhead, planted roof drainage ventilation, basement waterproofing system protection, thermal and moisture isolation of the interior surface, road and rail tunnel drainage protection. In the urban land, space, material resources are becoming scarce today, Dimple HDPE geomembrane to provide the most valuable option. Drainage board have a flat back which is pressed against an underground structure such as a basement wall or subsurface footing. The pressure of backfilled soils holds the Drainage board in place. A filtration geotextile covers the drainage core. The geotextile allows unrestricted flow of moisture into the core while it restricts the passing of soil particles which could contaminate and clog the core. Since most of the soil exposed surface of a subsurface structure is covered with the Drainage board, hydrostatic pressure is virtually eliminated. Drainage board are very ligthweight, easy to handle and easy to install. They require no special equipment or skilled labor. drainage board Specification: 1. Raw material:HDPE 2. Dimple heigt: 8mm-20mm 3. Sheet thickness:0.8mm-2.0mm 4. Roll width: 2m or 3m 5. Length: According to user's requirements. Number Item Name 1 Material Type HDPE HDPE HDPE HDPE HDPE HDPE HDPE 2 HDPE Average Thickness (mm)≥ 0.50 0.70 0.80 1.00 1.00 1.00 / 3 Weight (g/m2) 500 700 800 1000 1000 1000 2000 4 Sheet Thickness (mm) 8 8 12 12 16 20 20 5 Standard Packing Roll (Width x Length) 3mX20m 3mX20m 3mX20m 3mX20m 3mX15m 3mX15m 3mX20m Number Item Name 1 Unit Weight g/m2 ≥ 500 700 800 1000 1000 1000 2000 2 Tensile Strength N/5cm ≥ 250 350 350 450 450 450 / 3 Compressive Load KPa ≥ 200 300 300 300 300 300 350 4 Elongation at Crack % 25 25 30 40 40 40 5 Longitudinal Flow Capacity cm3/cm s ≥ 5.60 5.60 7.20 7.20 10.0 12.5 21.5 6 Puncture Strength N ≥ 300 320 350 400 400 400 / drainage board Property: 1.Waterproofing and drainage: form a channel, which water and gas can go through 2.Sound insulation and vibration isolation 3.Chemical resistance, resist to plants' root 4.Easy for construction 5.Long life drainage board Application: Greening project: garage roof greening, roof garden, vertical greening, sloping roof greening, football field, golf course. Municipal engineering: airport, road subgrade, subway, tunnel, landfill. Construction engineering: the upper or lower layer of the building foundation, the indoor and outdoor walls and bottom plates of the basement, as well as the roof, roof anti-seepage and heat insulation layer, etc. Water conservancy projects: anti-seepage water in reservoirs, reservoirs, and artificial lakes. Traffic engineering: