Extensive | steep pitched roof without curb

The ideal system for installing a maintenance-friendly extensive green roof with sedum blankets. Suitable for extensive vegetation on steep pitched roofs with a slope between 25° and 45°, without a roof curb.

The growing-medium layer of this structure consists only of a substrate replacement: ND SM-50 Substrate Panels. Because there is no substrate applied in this system, only vegetation blankets are suitable. Cuttings and plug plants are not possible for this composition (see 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. 88 mm
Total system weight, dry
n/a
n/a
approx. 17 kg/m²
Total system weight, saturated
n/a
n/a
approx. 56 kg/m²
Total water buffering
n/a
n/a
approx. 39 l/m²
Run-off coefficients
n/a
n/a
Cs = 0.5 - 0.6
Type of vegetation
n/a
n/a
Sedum
Slope in degrees
n/a
n/a
25° - 45°

Example composition

ND Erosion Protection Profiles and ND Fixation Clips

ND 100 Drainage System; filter layer and drainage layer glued into one product.

Root-resistant waterproofing membrane

from 88 mm
from 17 kg/m²
from 56 kg/m²
from 39 l/m²
Cs = 0.5 - 0.6
up to 45°

Suitable system for steep pitched roofs without roof curb

For roofs without curbs with a roof slope of 25° or more, erosion protection measures need to be done. In this structure, the ND Erosion Protection Profiles serve as a roof curb. The profiles are attached to the ND ESG 40/40 Erosion Protective Geogrid using the ND Fixing Clips.

The ND 100 Drainage System on a roll forms the core of this extensive green roof. This multifunctional CE-marked drainage system protects vegetation against water build-up. The ND 100 Drainage System protects the waterproofing membrane against the build-up of water pressure and mechanical loads both during and after construction. In tegenstelling tot drainagesystemen uit de ND +1 serie voor groendaken heeft dit drainagesysteem geen omgekeerde nop met waterbuffer.

The ND 100 Drainage System is easy and quick to install because the filter geotextile and drainage core are glued together. The drainage system is supplied on a roll and is therefore easy to handle and quick to unroll.

Due to the slope of the roof, increased rainwater drainage must be taken into account.

With this system we recommend using a root-resistant waterproofing membrane to limit the risk of sliding. More information regarding erosion protection can be found in the FLL guidelines.

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