Extensive | inverted roof
The ideal system for installing a maintenance-friendly extensive green roof with sedum, herbs and grasses. Suitable for roofs with an inverted roof construction.
All systems for extensive green roofs, with the exception of steep (pitched) roofs, is also applicable for an inverted roof construction. With an inverted roof, the insulation is above the waterproofing membrane. The other layers of the structures remain the same.
As with the other extensive applications, we show the possibilities here in terms of substrate height and type of vegetation. The insulation values are not included (see table below).
Technical data
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.
Thermal insulation
Root-resistant waterproofing membrane
Suitable for standard and inverted roof constructions
The core of this extensive green roof is formed by the ND 4+1h Drainage System on a roll. All ND +1 Drainage Systems (ND 4+1, ND 4+1h, ND 5+1, ND 6+1, ND 6+1v) can be used with both standard roof constructions and inverted roof constructions. They are all equipped with a perforated core and separating geotextile (not a slip film) so that the water vapor from the XPS insulation can evaporate freely with an inverted roof. The suitability of the thermal insulation has to be proven by the insulation supplier.
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.
