The existing roof of the commercial warehouse is a multi-ply, built-up roofing (BUR) with a granular-surfaced cap sheet. However, the existing BUR has been losing its reflective granules, and the waterproofing asphalt has deteriorated. Additionally, the flashings and air conditioning curbs have developed cracks, which could lead to water infiltration into the building. Over time, the building occupants have been experiencing more and more leaks, to the point that it has become difficult to patch them reactively. The leaks have started to damage the occupants’ personal equipment and warehouse inventory.