How many layers are in the ECCOsedum green roof system?

- 08/06/2023 -

The ECCOsedum green roof system consists of 3 layers:

  1. Drainage layer: The trays are designed to allow rainwater that is not absorbed by the green roof system to run off smoothly without obstruction to drainage points. The lower drain holes are located 1 cm from the bottom so that even non-capillary water can be stored to a limited extent.
  2. Substrate layer – water buffer layer: The trays are filled to full height (8 cm) with substrate. In some places (near the emergency spillways), the thickness of the substrate is 3.5 cm. Thus, the minimum thickness of the substrate is 3.5 cm – the average thickness is 6 cm. The substrate layer has several functions: It provides nutrition, oxygen and water to vegetation, as well as it anchors the roots. ECCOsedum trays are filled with roof garden substrate, composed of lava, pumice and green compost.
    Water buffer volume per tray: 32.5 litres/m²
    Chip size: 0-12 mm
    Volume weight of substrate after compaction in dry condition: 0.78 g/cm³
    Volume weight of substrate after compaction at maximum water capacity: 1.27 g/cm³
  3. Vegetation layer: The pre-cultivated extensive green roof system consists of at least 7 species of sedum plants. The trays are delivered at least 80% densely grown.