Green roof’s drainage and storage layers

Layers that drain and/or store water are essential for the functioning of the green roof. The drainage layer is selected based on the roof pitch, the required drainage and water retention capacity and the properties of the relevant vegetation and substrate layer.

For roofs with a slope smaller than 1:10, we recommend Platon DE 25 and DE 40 sheets. These products are manufactured by Isola with decades of experience in green roof construction. Platon DE 40 is the right choice for sites with high water retention and drainage capacity requirements, such as roof gardens.

Platon DE 25

Platon DE 25 can be used as a drainage layer on low-slope green roofs.

Platon DE 40

Platon DE 40 can be used as a drainage layer on low-slope green roofs with high drainage requirement.

Kerabit QDrain drainage layer

QDrain can be used as a drainage layer for exterior decks and green roofs.

Veg Tech VT-Filt felt mat

Veg Tech VT-Filt is a water-retaining felt mat intended for Xeroflor sedum roofs.

Veg Tech Xerodrän drainage layer

Intended for Xeroflor sedum-moss roofs, Veg Tech Xerodrän is a drainage layer with no water retention capacity.