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ND 4+1h Drainage System

High-performance, CE-marked drainage system with a water reservoir for roofs planted with extensive or intensive vegetation. 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. It's a 3-in-1 product (on roll) consisting of a filter geotextile and a vapour-permeable geotextile that are glued (not thermally bonded) to the dimpled core.

ND 4+1h Drainage System
Dimensions approx. 30 m x 1.25 m
Packaging approx. 37.5 m², roll
Weight approx. 1,010 g/m²
Construction height approx. 17 mm
Compressive strength approx. 450 kPa
Material dimpled sheet recycled, high impact polystyrene (HIPS)
Material filter geotextile polypropylene (PP)
Material vapour-permeable geotextile polypropylene (PP) and propyethylene (PE)
Perforations /m² approx. 1,540, Ø 6.3 mm
Water reservoir approx. 4.3 l/m²
Drainage capacity i = 1 (20 kPa) approx. 7.61 l/(s.m)
Drainage capacity 2 % fall (20 kPa) approx. 1.19 l/(s.m)
CE hEN 13252


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Downloads ND 4+1h Drainage System

DoP ND 4+1h

DoP ND 4+1h

Here you can download the DoP of this product.
Product brochure

Product brochure

Here you can download the Nophadrain product brochure.