ND 4+1h Drainage system
Product code
076306
The ND 4+1h Drainage system is the ideal under layer for an extensive green roof. This multifunctional, CE-marked drainage system with high compressive strength protects the vegetation from water stagnation, while at the same time storing water for dry periods in the built-in water reservoir.
In addition, the ND 4+1h Drainage System protects the waterproofing membrane from a build-up of hydrostatic pressure and mechanical loads, both during and after installation. Details
ND 4+1h Drainage system
| Dimensions | approx. 30 m x 1.25 m |
| Packaging | approx. 37.5 m², roll |
| Weight | approx. 1,017g/m² |
| Build-up height | approx. 17 mm |
| Compressive strength | approx. 450 kPa |
| Material dimpled sheet | recycled, high impact polystyrene (HIPS) |
| Material geotextile filter | polypropylene (PP) |
| Material vapour-permeable geotextile | polypropylene (PP) and propyethylene (PE) |
| Perforations /m² | approx. 1,540, ? 6.3 mm |
| Water reservoir | approx. 4.3 l/m² |
| Drainage capacity i = 1 (20 kPa) | 7.86 l/(s.m) |
| Drainage capacity 2 % fall (20 kPa) | 0.96 l/(s.m) |
| CE | hEN EN 13252 |
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