Why do roof penetrations on flat roofs leak, and how can you prevent it?
Roof penetrations on flat roofs leak because they interrupt the roof’s roofing membrane and then get stressed by movement, weather, and standing water. HVAC curbs, vents, and pipes fail most often at flashing seams, corners, and sealant lines. You prevent leaks by using the right flashing details, keeping water from ponding at penetrations, and inspecting…

