Has ENERGY STAR® created guidelines for determining whether a low slope roofing product is reflective or not?
Yes. They are composed of reflectivity testing per ASTM E903 or ASTM C1549. Additionally, • Product must meet or exceed initial reflectivity of 0.65. • Maintenance of Reflectivity must be 0.50 AND be obtained from testing of specimens from at least three identified existing roofs that have been installed for a minimum of three years. A minimum of three specimens per roof is required to be tested. Roof specimens may be cleaned with soap and water before testing and the individual data points are averaged. At least one of the identified roofs must be located within a major metropolitan area.
