A cool surface reflects the sun's ultraviolet rays and slows down roof aging. Roofing materials also contract and expand daily as they heat up during the day and cool down at night. A roof with a cool coating doesn't experience such large daily temperature fluctuations so it undergoes less thermal fatigue. Lower roof temperatures also reduce the rate of any chemical breakdown. A cool coating can increase roof life and significantly decrease roof maintenance and expenditures.
Cool coatings can also reduce air pollution.
Direct reductions in air pollution generated from power plants result when less energy is used to cool a building. Use of cool coatings can also reduce the amount of roofing materials produced, used and thrown away. Eleven million tons of roofing waste currently land in U.S. landfills every year. If cool coatings are used to increase roof life this waste can be greatly reduced, and the energy and materials needed to produce new roofing can be conserved. The same properties that keep a roof cool in summer also reduce its temperature and heat transfer to the building below in winter.