Green Roof
Green Roof Performance Data
- Roof produced a 10 percent decrease in building energy use over the winter months.
- The temperature on the green roof on the hottest summer days can be as much as 59 degrees cooler than conventional roofs on neighboring buildings.
- During a 10¨Cmonth monitoring period, Ë¿¹ÏÊÓƵ¡¯s green roof prevented 27,500 gallons of stormwater ¡ª nearly 78 percent of all precipitation hitting the roof ¡ª from flowing into D.C.¡¯s overburdened sewer and stormwater system.
- Water quality testing shows that the water runoff contains fewer pollutants than typical water runoff.? Most significantly, the roof is reducing the amount of nitrogen entering the watershed.??
- Except during repeated heavy rains, the roof only creates runoff during rainfalls of more than one inch.
Synopsis of Performance
Full Report
Sustainability with Style: The Ë¿¹ÏÊÓƵ Headquarters Green Roof, by Nancy Somerville, Hon. Ë¿¹ÏÊÓƵ and Chistopher Counts, Ë¿¹ÏÊÓƵ