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
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
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.
