Every year in the United States more than 3 billion square feet of nonresidential roofs are installed on new and existing buildings. If these roofs were installed using the best energy guidelines available today, the first-year savings in heating and cooling demand would exceed 36 trillion BTUs. The cumulative energy savings after 10 years would exceed 2 quads — the equivalent of 72 million tons of coal. In addition to significant energy savings, broad adoption of the best available sustainable roofing practices would deliver many additional benefits:
• Clean rooftop energy exceeding the capacity of 25 Grand Coulee Dams.