ND 5+1 Drainage system

Product code


High-quality, CE-marked drainage system with a water reservoir for roofs with limited fall that are planted with extensive or intensive vegetation, or where extensive drainage lengths are required.

The drainage system prevents the build-up of hydrostatic pressure on the waterproofing membrane, protects it against mechanical loads and ensures that vapour is able to evaporate freely from the XPS insulation on an inverted roof. Details

ND 5+1 Drainage system

Dimensions approx. 20 m x 1.25 m
Packaging approx. 25 m², roll
Weight approx. 1,252 g/m²
Build-up height approx. 27.5 mm
Compressive strength approx. 480 kPa
Material dimpled sheet recycled, high impact polystyrene (HIPS)
Material geotextile filter polypropylene (PP)
Material vapour-permeable geotextile polypropylene (PP) and propyethylene (PE)
Perforation /m² approx. 575, ? 15.8 mm
Water reservoir approx. 5.8 l/m²
Drainage capacity i = 1 (20 kPa) 15.70 l/(s.m)
Drainage capacity 2 % fall (20 kPa) 2.14 l/(s.m)
CE hEN EN 13252

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