Extensive | pitched roof multilayer

Pitched roof with substrate replacing panels

With the exception of the ‘single-layer pitched roof system‘, Nophadrain systems are multi-layered. In a multi-layer structure, the vegetation-bearing layer is separated from the drainage layer by a separate filter layer. In this structure, the growing-medium layer consists of the ND SM-50 Substrate Panels. This substrate replacement is lightweight, but can store approximately 30 l /m² water. The ND WSF-24 Water Resistant Strip Foil ensures that moisture is retained better in the ND SM-50 Substrate Panels in a pitched position.

The core of this extensive green roof is formed by the ND 100 Drainage System on a roll 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. Unlike drainage systems from the ND +1 series for green roofs, this drainage system does not have an inverted dimple with a water buffer.

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.

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.