Extensive green roofs

The ideal system for installing a maintenance-friendly extensive green roof with sedum, herbs and grasses. Suitable for flat and (steep) pitched roofs. 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. There is a suitable extensive green roof system for almost every roof.

View the most common systems for extensive green roofs under specific applications.

Substrate roof – Extensive

The growing-medum 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
80 mm
80 mm
50 mm
Total system height
97 mm
97 mm
97 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. 28 l/m²
approx. 28 l/m²
approx. 28 l/m²
Run-off coefficients
Cs = 0.4-0.5
Cs = 0.4-0.5
Cs = 0.4-0.5
Type of vegetation
sedum, herbs and grasses
sedum, herbs and grasses
sedum, herbs and grasses
Slope in degrees
1.5° - 15°
1.5° - 15°
1.5° - 15°

Example composition

Extensive vegetation (blankets, plug plants or cuttings)

ND 4+1h Drainage System; filter layer, drainage layer, protective layer and water buffer layer glued to one product.

Root-resistant waterproofing membrane

from approx. 97 mm
from approx. 71 kg/m²
from approx. 96 kg/m²
from approx. 28 l/m²
Cs = 0.4-0.5
1.5° - 15°

Specific applications

A strong core with integrated water buffer

The core of this extensive green roof is formed by the ND 4+1h 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 (of 4.3 l/m²) for dry periods. In addition, the ND 4+1h Drainage System protects the waterproofing membrane against the build-up of water pressure and mechanical loads both during and after construction.

The ND 4+1h Drainage System is easy and quick to install because the filter geotextile, drainage core with water buffering and the protective geotextile are glued together. The drainage system is supplied on a roll and is therefore easy to handle and quick to unroll.

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

Generic filters
Exact matches only
Filter by Product categorieën
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
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
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
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