Green Roofs

Also known as “living roofs”, green roofs serve several purposes for a building, such as absorbing rainwater, providing insulation, creating a habitat for wildlife, and helping to lower urban air temperatures and combat the heat island effect.

Benefits of a Green Roof System?

• Reduce storm water run-off which, in turn, reduces the stress on urban sewer systems and decreases run-off related pollution of natural waterways
• Insulating qualities mean reduced energy costs for building owners
• Air quality improvement – lower rooftop temperatures mean less smog from the “urban heat island effect”
• Noise pollution reduction – studies show noise levels in a building can be reduced by as much as 40 decibels
• Extended life of the roof system due to moderated temperature swings that cause a roof system to expand and contract as well as protection from everyday wear and tear.

There are two types of green roofs: intensive roofs, which are thicker and can support a wider variety of plants but are heavier and require more maintenance, and extensive roofs, which are covered in a light layer of vegetation and are lighter than an intensive green roof.

Green roof technologies not only provide the owners of buildings with a proven return on investment, but also represent opportunities for significant social, economic and environmental benefits, particularly in cities. Find out more about the private and public benefits of green roof technologies at www.greenroofs.org. 

Green Roof Frequently Asked Questions