Airmen from the 9th Civil Engineer Squadron roof maintenance team, spray a silicone-based rubberized roofing system on the Base Exchange as part of the roof restoration project July 31, 2014, at Beale Air Force Base, Calif. To date, the roof maintenance team has completed 12 roofs covering more than 90,000 square feet. (U.S. Air Force photo by Airman 1st Class Ramon A. Adelan/ Released)