Green roofs help cool cities, manage storm water, clean the air, and build habitat

What's a Green Roof and How Does It Help The Environment?

A green roof replaces traditional roofing with a lightweight, living system of soil, compost, and plants. It creates a thin, green skin atop a building that gives a little something back to the world.

The plants–and the dirt and gravel that hold them–filter rainwater and some of its pollutants. The plants produce oxygen that help clean the air. A green roof reduces a building's heating and cooling costs, acting as a form of insulation. And they lessen the heat island effect, in which buildings warm up so much that they heat the surroundings.

Explore the Benefits of a Green Roof





This green roof is on the ASLA building in Washington D.C.


360-tour Visit a REAL GREEN ROOF!

Take the 360° virtual tour and see how it feels to be ON the green roof.



Teacher Resources

The ASLA Green Roof Education Program is made possible by a grant from the National Endowment for the Arts and a generous contribution from the landscape architecture firm of Lewis Scully Gionet, Inc.