MAY 2011 - General Services Administration
The Benefits and Challenges of Green Roofs on Public and commercial BuildingsA Report of the United States General Services AdministrationMAY 2011Front cover: Image of the green roof on the United States Department of Transportation Headquarters GSA GREEN ROOF BENEFITS AND CHALLENGESTABLE OF CONTENTSCONTENTSEXECUTIVE Purpose of Study ........................................ ........................................ ........................................ ........... Methodology ........................................ ........................................ ........................................ .................. Background to Green Roofs ........................................ ........................................ ................................... Cost ........................................ ........................................ ........................................ .............................. Scope of Report.
commercial and public buildings include: • Improved water quality due to reduced stormwater runoff and fewer overflows of combined sanitary and stormwater sewage systems • Increased habitat promoting biodiversity • Lower temperatures for building roofs and the air above them in most climates • Reduced energy consumption in some climates •
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