An ecoroof is a term used to describe a green living roof of vegetation and soil. This type of roof is also called a green roof or extensive roof garden. It is a light weight roof system consisting of a synthetic waterproof membrane, a drainage layer, a thin soil layer, and is covered with specific plant species adapted to the extremes of a rooftop environment. The ecoroof is a low maintenance, self-sustaining plant/soil community without need of irrigation, fertilizers, or pesticides. Ecoroofs are a proven technology and have been used in Europe for over 40 years. Check out our revealing interactive timeline and learn more about how our project went from start to finish.


The City of Portland is encouraging the use of ecoroofs as part of itsefforts to clean and protect our streams and rivers. In urban areas, stormwater runs off hard surfaces like roofs, roads, parking lots, and sidewalks. It is flushed to a network of underground pipes, that eventually dump it all in the urban streams, ruining fish habitat. Ecoroofs, on the other hand, soak up the water and eventually return it to the natural hydrologic cycle, through evaporation and photosynthesis. Ecoroofing is one of several stormwater management approaches that can return a natural healthy watershed to our community.


Check out our links. Explore other greenroof projects. Take the Pledge to do your part to help save Salmon. Check our other watershed information from City of Portland, Environmental Services. Learn about the complex interconnected ecological and economic benefits of disconnecting your site's stormwater flow from the traditional concrete and steel piped system. Find other ways of reconnecting it to the natural hydrologic cycle, instead.