PM P-40

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PM P-40

Dimpled sheet in plate form

PM P-40 is a water-storing, perforated dimpled membrane in sheet form and is recommendable as an ideal solution for intensive roof greening. Compared to conventional green roof products, it offers many times the drainage and water storage capacity and assumes the function of an extremely high-performance drainage and water storage layer in intensive green roofs.

The 40 mm high dimples have a water storage capacity of approx. 15 l/m². This allows the optimal installation of green areas designed to do without irrigation for extended periods. The pressure resistance of approx. 200 kN/m² boasts a striking level of security, thereby corresponding to a compressive strength of approx. 20 tonnes per m². The dimpled membrane has a unusually high drainage capacity of i = 0.10; approx. 3.78 l/s·m, allowing it to be used for very large drainage lengths and/or very low roof slopes.

PM P-40 is available as a dimpled sheet in the dimensions 1.00 x 2.00 m. The plant substrate can be applied directly on the dimpled membrane after laying a separate geotextile.

Thanks to the perforation, the water-storing drainage element 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. Then the pavement or slab covering can be laid on top of it.

Dimpled membrane HDPE approx. 2200 g/m²
Dimple height approx. 40 mm
Material thickness approx. 1,50 mm
Total weight approx. 2,20 kg/m²
Number of dimples 164 dimples/m²
Compressive strength approx. 200 kN/m²
Colour black
Water draining capacity
i = 1.00
approx. 4,30 l/s·m
Water draining capacity
i = 0.10
approx. 3,78 l/s·m
Water storage approx. 15 l/m²
Plate length 2,00 m
Sheetwidth 1,00 m
Temperature resistance –30 °C to +80 °C
Chemical properties chemical-resistant
Physiological properties safe for drinking water
Fire behaviour class E

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