PM P-STANDARD GS

Dimpled sheet

PM P-STANDARD GS is a water-storing, perforated dimpled membrane and is regarded as an ideal solution for extensive roof greening. Compared to normal dimpled membranes, PM P-STANDARD GS offers a high drainage and water storage capacity and assumes the function of a protective and water storage layer in green roofs. The 8 mm dimples have a water storage capacity of approx. 3 l/m².

The pressure resistance of approx. 200 kN/m² offers a high level of security, corresponding to a compressive strength of approx. 20 tonnes per m². The 8 mm dimpled membrane also offers a high drainage capacity.

The plant substrate can be applied directly on the dimpled membrane after laying a separate geotextile. Thanks to the perforation, the water-storing drainage membrane is permeable and can also be used for inverted roofs. This prevents a film of water from forming on the inverted roof insulation. In walkable areas without vegetation, no geotextile is used. The base layer and the bedding material can then be applied directly on the dimpled membrane without changing the material, and then the pavement or slab covering can be laid on top of it.

Material	HDPE
Dimple height	approx. 8 mm
Number of dimples	1.710 dimples/m²
Colour	black
Compressive strength	approx. 200 kN/m²
Water flow capacity in the plane i = 1.0	approx. 2,25 l/s·m at 20 kPa rigid/soft
Water flow capacity in the plane i = 0.01	approx. 0,16 l/s·m at 20 kPa rigid/soft
Water flow capacity in the plane i = 0.02	approx. 0,26 l/s·m at 20 kPa rigid/soft
Water flow capacity in the plane i = 0.03	approx. 0,34 l/s·m at 20 kPa rigid/soft
Water storage	approx. 3,0 l/m²
Roll length	20 m or on request
Roll width	2,0 m
Air volume between the dimples	approx. 5,5 l/m²
Temperature resistance	–30 °C to +80 °C
Chemical properties	chemical-resistant
Physiological properties	safe for drinking water
Fire behaviour	class E