Extensive | roof with limited fall

The ideal system for installing a maintenance-friendly extensive green roof with sedum, herbs and grasses. Suitable for roofs with limited fall due to the ND 5+1 Drainage System as the core of the composition.

We supply complete extensive green roof systems, including the vegetation. We grow the vegetation ourselves at our sedum nursery and it is of excellent quality. The growing-medium layer of this standard composition consists only of substrate. The extensive substrate is tailored to the needs of the sedum vegetation. The substrate height is determined by the chosen type of vegetation: sedum blankets, plug plants or cuttings (see table below).

Technical data

Cuttings
Plug plants
Blankets
Recommended substrate height
approx. 80 mm
approx. 80 mm
approx. 50 mm
Total system height
approx. 108 mm
approx. 108 mm
approx. 108 mm
Total system weight, dry
approx. 90 kg/m²
approx. 90 kg/m²
approx. 72 kg/m²
Total system weight, saturated
approx. 118 kg/m²
approx. 118 kg/m²
approx. 96 kg/m²
Total water buffering
approx. 29 l/m²
approx. 29 l/m²
approx. 29 l/m²
Run-off coefficients
Cs = 0.4-0.5
Cs = 0.4-0.5
Cs = 0.4-0.5
Type of vegetation
Extensive vegetation
Extensive vegetation
Extensive vegetation
Slope in degrees
0° - 5°
0° - 5°
0° - 5°

Example composition

Extensive vegetation (blankets, plug plants or cuttings)

ND 5+1 Drainage System; filter layer, drainage layer, protective layer and water buffer layer glued to one product.

Root-resistant waterproofing membrane

from approx. 108 mm
from approx. 71 kg/m²
from approx. 96 kg/m²
from approx. 29 l/m²
Cs = 0.4-0.5
0° - 5°

A strong core with extra high water buffering dimple

The core of this extensive green roof with a roof construction with insufficient slope is formed by the ND 5+1 Drainage System on a roll. This multifunctional CE-marked drainage system with high compressive strength protects vegetation against water build-up and at the same time stores water in the built-in water reservoir (5.8 l/m²) for dry periods. The high dimple of this drainage system ensures that on roofs with insufficient fall, the waterproofing membrane is protected against the build-up of water pressure and mechanical loads.

This multifunctional CE-marked drainage system with high compressive strength protects vegetation against water build-up and at the same time stores water in the built-in water reservoir (5.8 l/m²) for dry periods. The high dimple of this drainage system ensures that on roofs with insufficient fall, the waterproofing membrane is protected against the build-up of water pressure and mechanical loads.

If the waterproofing membrane is not root-resistant, we recommend adding the ND WSB-50 Root Barrier.

View our projects

Would you like to learn more about the possibilities of our innovative Nophadrain solutions for your project? Check out our existing projects here.

Generic filters
Exact matches only
Filter by Product categorieën
Green roof packages
Root barrier layer
Water buffering and water retention layer
Trafficable roofs
Vertical protection and drainage layer
Vegetation layer
Solar roofs
Growing medium layer
Roof edge / edge retaining profiles
Filter and drainage layer
Separation, protection and slip layer
Filter layer
Green roofs
Sedum cassettes
Erosion protection
Water retention
Inspection chambers
Generic filters
Exact matches only
Filter by Product categorieën
Green roof packages
Root barrier layer
Water buffering and water retention layer
Trafficable roofs
Vertical protection and drainage layer
Vegetation layer
Solar roofs
Growing medium layer
Roof edge / edge retaining profiles
Filter and drainage layer
Separation, protection and slip layer
Filter layer
Green roofs
Sedum cassettes
Erosion protection
Water retention
Inspection chambers
Generic filters
Exact matches only
Filter by Product categorieën
Green roof packages
Root barrier layer
Water buffering and water retention layer
Trafficable roofs
Vertical protection and drainage layer
Vegetation layer
Solar roofs
Growing medium layer
Roof edge / edge retaining profiles
Filter and drainage layer
Separation, protection and slip layer
Filter layer
Green roofs
Sedum cassettes
Erosion protection
Water retention
Inspection chambers
Generic filters
Exact matches only
Filter by Product categorieën
Green roof packages
Root barrier layer
Water buffering and water retention layer
Trafficable roofs
Vertical protection and drainage layer
Vegetation layer
Solar roofs
Growing medium layer
Roof edge / edge retaining profiles
Filter and drainage layer
Separation, protection and slip layer
Filter layer
Green roofs
Sedum cassettes
Erosion protection
Water retention
Inspection chambers