ENERGY STAR is for roofs, too. Like the energy-efficient appliances in your home, an ENERGY STAR rated shingle can help make your home more comfortable and energy-efficient. These cool shingles reflect solar energy because the granules on the shingle help bounce the suns rays decreasing the amount of heat transferred into a homes interiorand the amount of air conditioning needed to keep it comfortable. Actual savings will vary based on geographic location and individual building characteristics. ENERGY STAR rated shingles are required to have an initial solar reflectance index of 0.25 and a 3-year aged solar reflectance of 0.15.