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.
membrane, growing medium (soil) and vegetation (plants) overlying a traditional roof. Green roofs can help mitigate the problems that cities create by bringing the natural cooling, water-treatment and air filtration properties that vegetated landscapes provide to the urban environment. Architects and planners can use
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