The ND Sedum Cassette – Premium makes it possible to realize an extensive green roof in one go. The cassettes have dimensions of 460 x 495 mm x 80 mm. The cassettes combine the drainage layer, water buffering layer, filter layer, substrate layer and vegetation layer in one product. This means that it’s not necessary to apply substrate and vegetation separately. he cassettes are designed in such a way that they can be connected quickly and easily on the root-resistant waterproofing membrane, which has to be protected by a protective layer such as the ND SV-300 Protection Geotextile.
The ND Sedum Cassette – Premium makes it possible to realize an extensive green roof in one go. The cassettes have dimensions of 460 x 495 mm x 80 mm. The cassettes combine the drainage layer, water buffering layer, filter layer, substrate layer and vegetation layer in one product. This means that it’s not necessary to apply substrate and vegetation separately. he cassettes are designed in such a way that they can be connected quickly and easily on the root-resistant waterproofing membrane, which has to be protected by a protective layer such as the ND SV-300 Protection Geotextile.
The composition of the sedum cassette consists of 5 layers:
1. Drainage layer: excess rainwater can drain into the sewage system. That is why four drainage holes have been made per cavity at the top and bottom of the water-buffering layer.
2. Water buffering layer: rainwater is buffered capillary in a substrate of slightly expanded clay granules. The excess water that can’t be stored is being drained quickly of the roof. To create an extra water buffer for dry periods, water is also stored non-capillary because the drainage holes are installed about 1 cm from the bottom.
3. Filter layer: A non-woven polyester filter geotextile of 150 g/m² ensures that the fine particles of the substrate cannot be washed away and cannot block the drainage holes.
4. Substrate layer: the thickness of the substrate layer is adapted to the needs of the sedum and the climate. The substrate layer provides the nutrients and water supply for the sedum on the one hand, and oxygen and anchorage for the roots on the other.
5. Vegetation layer – Sedum: The sedum cassettes have at least 80% coverage with 8 to 10 different types of sedum.
The following species can occur in the ND Sedum Cassettes:
Delivery and installation
The ND Sedum Cassettes – Premium can be delivered per piece and can be used on roofs with no or limited falls and roofs with a slope up to 15 degrees. First, always check whether the waterproofing membrane is suitable for the installation of a green roof. Suitable root-resistant foils (such as the ND WSB-50 Root Barrier) and protective membranes (such as the ND SV-300 Protection Geotextile) can also be found in our product range. If necessary, the cassettes can be cut to size. The transition to ascending areas can easily be achieved with gravel.
De ND Sedum Cassettes – Sedum are also available with wildflowers.
Curious about the possibilities of our innovative Nophadrain solutions for your project? Don’t wait any longer and request an quotation here!
