HW-PSD20 (106) DRAIN BOARD,drainage sheet,sheet drain The HW-PSD20 Drain Board develops on the basic off the HW-PSD10, is made by the high polystyrene (HIPS). The surface is joined to an adhesive-bonded cloth, thus forms a combination Drain Board. HW-PSD20 is the one-sided raised Taiwan draining plant, only then the draining water function, compares with HW-PSD10, the HW-PSD20 displacement is bigger. Is suitable quite is deep in the soil layer does not need to store water the function large-scale square to afforest, project and so on garage roof afforestation. The construction for details sees (chart garage roof project) Product: HW-PSD20(106) Color of under plate: Black/White Material quality: High Polystyrene Quality(g/): 860 Thickness (mm): 20 Compressive strength (kpa): 200 Color of Geotextile Membrane : Black/White Material quality : Polyester fiber Hole caliber (mm) : 0.15 Runoff rate : 320 Tensile strengthN : 160 Quality(g/) : 150 Specification of Drain Boardmm: 1200×16660 Flow rate (Loss 5cm) (L/S) : 2.9 Flow rate (Loss 10cm) (L/S) : 4.2