In Tucson, a 28,000-square-foot city roof got a white elastomeric coating; cooling energy fell 50–65%, saving over 400 million Btu and nearly $4,000 a year

Cool roof coatings present an easy and efficient method to lower cooling bills during hot summer days. A Tucson city building illustrated impressive energy savings after the installation of a white elastomeric roof coating. Such reflective surfaces are adept at reducing sunlight absorption, successfully decreasing both surface and indoor temperatures. Despite a minor increase in heating costs during the milder winter months, the benefits of reduced cooling expenses generally prevail.