Urban Farm DB
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Database research record2026·United States

Using Green Roofs to Reduce Heat Islands

U.S. Environmental Protection Agency (EPA)

U.S. Environmental Protection Agency (EPA)

Urban Farm DB summary

This EPA page explains that green roofs can lower surface temperatures by up to 56°F, nearby air temperatures by up to 20°F, and indoor air temperatures by 27°F compared to conventional roofs, while cutting cooling loads by up to 70% and reducing runoff by 60-100%. The industry grew 5-15% from 2013-2019, with 763 projects covering more than 3.1 million square feet installed in 2019.

Extracted facts

6 facts

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.

  • 56 F↓ Decrease

    surface temperature reduction(green roof)

    ClimateControl: conventional roof
    region
    United States
  • 20 F↓ Decrease

    nearby air temperature reduction(green roof)

    ClimateControl: conventional roof / urban baseline
    region
    United States
  • 27 F↓ Decrease

    indoor air temperature reduction(green roof)

    ClimateControl: conventional roof
    region
    United States
  • 70 %↓ Decrease

    cooling load reduction(green roof)

    ClimateControl: conventional roof
    region
    United States
  • 60–100 %↓ Decrease

    stormwater runoff reduction(green roof)

    WaterControl: conventional roof
    region
    United States
  • 763 count

    installed projects(green roof industry)

    Economics
    region
    United States
    year
    2019

Direction of conclusions

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  • Heat islandSupports
  • StormwaterSupports

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