Extensive green roof at Fildorado, Filderstadt, Germany © Optigroen

Retention roof

Data

  • Weight: from 120-180 kg/m²
  • Depth: 12 cm
  • Roof pitch: 0-5° (0-9%)
  • Vegetation form: herbs / grasses / sedum
  • Water retention: ≥ 80%
  • Discharge coefficient: ≤ 0.2
  • Water storage: approx. 25 l/m²
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© Optigroen

1 vegetation
2 substrate
3 filter mat
4-5 drainage layer
6 flow regulation
7 protection mat