Inspiration Card
Nature Based Solution
Green Roofs

N14 Constructed Wet Roof

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Climate Resilience Water Management Natural and Climate Hazards Biodiversity Enhancement Air Quality Health and Well-being Social Justice and Social Cohesion

Constructed wet roofs combine the ideas of extensive green roofs and constructed wetlands for storm water and domestic wastewater treatment. Constructed wet roofs temporarily retain and then gradually release storm water, thereby reducing peak runoff flow rates and associated flood risk. Additionally, the treated water may be reused for irrigation or other purposes. Constructed wet roofs offer many of the same benefits as extensive green roofs, but are more physiologically active and therefore contribute to stronger positive impacts on the microclimate, air quality and biodiversity.

Conditions for Implementation
  • Slope gradient to water outlets
  • Emergency overflows
  • Waterproofing the surface of the roof
  • Sufficient load-bearing capacity including underground support structures
Similar Terminology
Wetland roofs
    Cooling Service Transpiration
    Building (Insulation)
    Reflection (Albedo)
    Surface Water Regulation Water Conveyance
    Water Infiltration
    Water Retention
    Water Storage
    Water Reuse
    Water Purification Water Filtering
    Water Bio-remediation
    Air Purification and Noise Reduction Deposition
    Air Biofiltration
    Noise Reduction
    Biodiversity Habitat Provision
    Socio-Cultural Services Beauty / Appearance
    Usability / Functionality
    Social Interaction
    Provisioning Service Food / Energy / Material
    Climate Regulation CO2 Sequestration