Metal Roof With Silicone

This is a 26,000 square foot metal roof on a commercial hangar.  This roof was leaking around many screw heads and around many of the penetrations throughout the entire roof.  The metal roof was power washed.  All penetrations were inspected and treated with trowel grade silicone.  All screw heads were inspected, tightened as needed and pre- treated with trowel grade silicone before applying 22 mils of silicone to the entire roof.