Green Roofs

Green roofs are one of many techniques being used to address runoff from roofs. Green roofs are making more and more appearances on public and park buildings, but they are not limited to those installations.

While most green roofs are used to address stormwater, research from the EPA has found that these installations reduce the impact of the Urban Heat Island Effect.

From the EPA: Reducing Urban Heat Islands: Compendium of Strategies: Green Roofs

Green Roofs in the Field


In 2015, during the Statewide LID Training, there was a module on Green Roofs addressing the replanting of the Urban Waters Building in Tacoma.

Greenroof Retrofit, Lessons Learned: Out with the old and in with the new

Initially, the green roof on the UWaters building in Tacoma, along the Thea Foss Waterway, was a mix of drought tolerant and aesthetic flowers and perennial plants. It was replanted with densely planted sedum tiles. Not only did this prevent invasives from taking root, it also provided habitat for local wildlife.

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