Green roofs should be waterproofed carefully using appropriate torch-applied modified bitumen membranes of the correct product classification. The topmost waterproofing layer can be made of Kerabit Root Prevention Membrane that prevents the roots of the plants from penetrating the waterproofing layer.
Depending on the decking, roof pitch and structural design, the following Kerabit underlay membranes may be used:
- Kerabit 4100 UT torch-on, TL 2
- Kerabit 3300 UTL line-torch-on, TL 2
- Kerabit 3000 U glued with molten bitumen, TL 2
- Kerabit 3000 UB with adhesive edges, TL 2
Kerabit 4100 UT, TL 2, may be used as an intermediate layer. For the top membrane, we recommend Kerabit Root Prevention Membrane, TL 2.