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Smart systems for green and utility roofs

Water storage and retention element made of polypropylene for surface drainage and water buffering used in the Nophadrain Systems for extensive green roofs. Due to the special design, the water retention elements can also be used on inverted roofs. The elements can be combined with flow restrictors for the suitable regulation of drainage (e.g. ND AFC-200 Adjustable Flow Control).

Product ND WSE-100lte Water Retention Element
Material Polypropylene (PP) 100% recycling material
Open volume approx. 95%
Open surface 63%
Durability 50 years
Dimensions approx. 0.6 m x 0.6 m x 100 mm
Compressive strength > 240 kN/m²
Weight per piece > 1.8 kg
Material Polypropylene (PP) 100% recycling material
Open volume approx. 95%
Open surface 63%
Durability 50 years
Dimensions approx. 0.6 m x 0.6 m x 100 mm
Compressive strength > 240 kN/m²
Weight per piece > 1.8 kg

Applications

The ND WSE-100lte Water Retention Elements are designed for roofs without fall and are therefore suitable for temporary storage or water buffering of excess water caused by possible discharge restrictions into the sewerage system due to e.g. heavy rain.

To establish targeted definitions of the discharge volume the appropriate throttle system can be combined with an adjustable flow control system (e.g. ND AFC-200) can be combined with a water retention build-up.

The ND WSE-100lte Water Retention Elements are suitable for the use in extensive green roofs. For protection of the waterproofing membrane or the thermal insulation, ND SV 300 Protective Geotextile hasto be placed underneath the ND WSE-100lte. As filter layer, the ND FV-300 Filter Geotextile has to be used.

Accessoires

The ND WSE-100lte Water Retention Systems need to be interlocked with special connectors (type Large) in order to assure best force transmission. Recommended quantity: 6 connectors per m2 (available per bag (50 pieces)).