Roof coatings use an extra layer of defense versus UV rays and weathering; they can extend the life of an existing roof while enhancing its energy effectiveness.

http://roofefficiencyguruqdvn956.trexgame.net/what-is-included-in-a-comprehensive-commercial-roofing-solution

Roof finishes offer an additional layer of defense against UV rays and weathering; they can extend the life of an existing roof while enhancing its energy efficiency