Sedum/Substrate (6cm) and vegetation
In the case of large projects, we advise sedum cuttings to be sown onto a substrate layer of about 6 cm. For smaller projects, we recommend the use of pre-cultivated layers. The substrate layer ensures feeding substances, water supplies to the vegetation plus oxygen and anchoring of the root structure.
alkorPLUS®81016 water retention layer
This layer provides the plants with extra water in time of drought or prolonged high temperatures. This allows the plants to continue growing and maintain their life expectancy.
alkorPLUS®81015 filter- and drainage layer
This layer is in two parts. The filter layer limits particles from the substrate layer migrating into the drainage layer causing blockages. The drainage layer ensures a steady removal of redundant water which is not held by the water retention layer.



alkorPLUS® 81014 slip layer or
alkorPLAN®35121 protection layer
This layer provides additional protection to underlying layers.

alkorPLAN® LA waterproofing membrane
(1.5 mm)
This product provides a watertight roof and is totally unaffected by roots. Fully glued with adhesive alkorPLUS® 81068)
Faced insulation

Vapour barrier

Structure