Inspiration Card
Nature Based Solution
Green Roofs

N12 Extensive Green 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

Extensive green roofs are lightweight systems that contain a thin layer of substrate covered with low growing, rapidly spreading vegetation. Typical groups of vegetation for extensive green roofs include sedums, herbs, wildflowers, grasses and mosses, since they are relatively hardy and can survive in low-nutrient conditions. Once established, extensive greens roofs require minimal maintenance and management and offer benefits like localized air temperature and pollution reduction and contribute to water management.  

Conditions for Implementation
  • Flat or relatively flat rooftops
  • Sufficient load-bearing capacity including underground support structures
  • Waterproofing the surface of the roof
  • Sustainable irrigation facilities for critically dry periods
Similar Terminology
Low-Profile green roof
Extensive roof greening
    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