Green roof

Urban Farm DB summary

This article describes green roofs as roof structures covered with vegetation and growing media that provide stormwater retention, insulation, urban heat island mitigation, and biodiversity benefits. Installation costs vary widely by system type, from $108-248/m2 for extensive systems to $355-2,368/m2 for intensive systems, with long-term economic benefits such as extended roof lifespan and increased property value offsetting high upfront costs.

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 108–248 usd_per_m2

  extensive system installation cost(green roof)

  Design

  method

  extensive green roof system

• 75 %

  stormwater retention rate(stormwater)

  Water

  method

  green roof, maximum retention

• 30 celsius_degrees↓ Decrease

  surface temperature reduction(roof surface temperature)

  ClimateControl: conventional roof, summer

  method

  2023 meta-analysis

• 26 %↓ Decrease

  cooling and heating demand reduction(building energy)

  ClimateControl: conventional roof

  method

  Environment Canada study

• 7 %↑ Increase

  property value increase(property value)

  EconomicsControl: average home without green roof
• 355–2,368 usd_per_m2

  intensive system installation cost(green roof)

  Design

  method

  intensive green roof system

• 1.4–4.4 celsius_degrees↓ Decrease

  surface temperature difference(roof surface temperature)

  ClimateControl: conventional roof

  region

  Chicago

  site

  Chicago City Hall

• 200 %↑ Increase

  roof lifespan extension(roof lifespan)

  DesignControl: conventional roof

Direction of conclusions

Each author conclusion is recorded only as a coded direction per topic. Read the original for the conclusion itself.

• StormwaterSupports
• Heat islandSupports
• Economic viabilityMixedWith caveats