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Smart systems for green and utility roofs

High-performance, CE-marked drainage system with very high compressive strength and a special mono-filament woven geotextile. Specially suited for installing pedestrian and vehicular pavements on sub-base layers made of rubble and permeable concrete. The drainage system prevents the build-up of hydrostatic pressure on the waterproofing membrane and protects it against mechanical loads. It's a 3-in-1 product (on roll) consisting of a woven filter geotextile and a pressure dividing slip film (ND 620hd) that are glued (not thermally bonded) to the dimpled core.

ND 620hd Drainage System
approx. 32 m x 1.25 m 
approx. 40 m², roll
approx. 1,400 g/m²
approx. 12.5 mm
 1,200 kPa
recycled, high impact polystyrene (HIPS)
polypropylene (PP)
polypropylene (PP)
5.36 l/(s.m)
0.74 l/(s.m)


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Download the brochure below