A roof coating is a fluid-applied protective membrane that covers the entirety of a roof. These coatings have enough elasticity to allow them to expand and contract with changes in temperature. A roof coating serves as the top layer of a composite roof membrane and its underlying system, protecting it against UV rays, rain, hail, and other physical damages. Applying a roof coating will improve protection from hail, high winds, and hail. Coatings can also be used to increase the maximum lifespan of your asphalt roof and increase energy savings. Although some roof coatings can be walked on, none are designed for high traffic.