Extensive | lightweight roof (without substrate)

The ideal system for installing a maintenance-friendly extensive green roof with sedum blankets. Suitable for roofs with a light load capacity.

Because there is no substrate used in this system, only vegetation blankets can be applied. Cuttings and plug plants are not possible for this system (view the table below).

Technical data

Cuttings
Plug plants
Blankets
Height substrate replacement
n/a
n/a
approx. 50 mm
Total system height
n/a
n/a
approx. 97 mm
Total system weight, dry
n/a
n/a
approx. 21 kg/m²
Total weight, saturated
n/a
n/a
approx.60 kg/m²
Total water buffering
n/a
n/a
approx. 39 l/m²
Run-off coefficients
n/a
n/a
Cs = 0.45 - 0.5
Type of vegetation
n/a
n/a
Sedum
Slope in degrees
n/a
n/a
1.5° - 15°

Example composition

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. 20 kg/m²
from approx. 60 kg/m²
from approx. 39 l/m²
Cs = 0.45 - 0.5
1.5° - 15°

Lightweight system with high water buffering

We have developed a lightweight system for roofs with a minimum load-bearing capacity. In this structure, the medium-growing layer consists of the ND SM-50 Substrate Panels. This substrate replacement is lightweight, but can store approximately 30 l of water per m².

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.

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