Watch PECO's Green Roof Grow

Totaling more than 45,000 square feet, PECOs green roof is the largest ever installed on an existing building in an urban setting in Pennsylvania. The vegetative roof consists of a variety of plants ranging from four to eight inches in thickness. The roof will help reduce stormwater runoff by absorbing 60 to 70 percent of the approximate 1.5 million gallons of annual rainwater that falls on the Main Office Building. The new roof also will save on heating and cooling costs by reducing the summertime peak roof temperature by 60 to 80 degrees, and absorbing air pollution which helps alleviate common respiratory problems.