Measures › Heat › Green roofs › Extensive green roofs › Retention roof
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
  • Water: 3
  • Heat: 2
  • Biodiversity: 1
  • Air quality: 1
  • Energy: 2
  • Multifunctional space usage: 2
  • Costs: 2

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Retention roof © Optigroen

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