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The American Society of Landscape Architects (ASLA) has released the first performance report since the society’s green roof was installed in July 2006.
ASLA’s green roof retained 27,500 gallons of storm water between July 2006 and May 2007, reduced building energy costs by hundreds of dollars a month and significantly lowered outdoor air temperature according to a report from the society. The report examined various components of ASLA’s green roof demonstration project, in downtown Washington, D.C., ranging from water and temperature monitoring to individual plant performance.