PM P-20-GEOTEX
PM P-20-GEOTEX is a water-storing drainage membrane with an integrated geotextile and is considered the ideal solution for extensive and intensive green roofs. In the green roof, it takes on the function of a protective, filter, seepage and water-storage layer.
PM P-20-GEOTEX is a water-storing drainage membrane and is regarded as an ideal solution for extensive and intensive roof greening. Compared to normal dimpled membranes, PM P-20-GEOTEX offers many times the drainage and water storage capacity and assumes the function of a protective, filter, seepage and water storage layer in green roofs.
The 20 mm dimples have a water storage capacity of approx. 6 l/m2. The pressure resistance of approx. 150 kN/m² offers a high level of security, corresponding to a compressive strength of approx. 15 tonnes per m². The 20 mm dimpled membrane also offers a unusually high drainage capacity of i = 0.02; approx. 0,61 l/s·m. It can therefore also be used for very large drainage lengths and/or very low roof slopes.
The plant substrate can be applied directly as the geotextile is already integrated. This saves an additional work step. 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. The geotextile should be removed from walkable areas without vegetation. 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.
Technical Data
| Dimpled membrane | HDPE approx. 700 g/m² |
|---|---|
| Geotextil | PP approx. 100 g/m² |
| Dimple height | approx. 20 mm |
| Total weight | approx. 800 g/m² |
| Number of dimples | 400 dimples/m² |
| Compressive strength | approx. 150 kN/m² |
| Colour | black |
| Water flow capacity in the plane i = 1.0 | approx. 8,54 l/s·m at 20 kPa rigid/soft |
| Water flow capacity in the plane i = 0.01 | approx. 0,36 l/s·m at 20 kPa rigid/soft |
| Water flow capacity in the plane i = 0.02 | approx. 0,61 l/s·m at 20 kPa rigid/soft |
| Water flow capacity in the plane i = 0.03 | approx. 0,78 l/s·m at 20 kPa rigid/soft |
| Water storage | approx. 6,0 l/m² |
| Roll length | 10 m or on request |
| Roll width | 2 m |
| Air volume between the dimples | approx. 14 l/m² |
| Temperature resistance | –30 °C to +80 °C |
| Chemical properties | chemical-resistant |
| Physiological properties | safe for drinking water |
| Characteristic opening width | approx. 170 μm |
| Water permeability EN ISO 11058 | approx. 100 · 10<sup>-3</sup> m/s |
| Fire behaviour | class E |
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