How To Repair Foam Roof Blisters
Inspect the damaged area for any moisture and continue cutting away damaged foam until only strong and dry foam remains.
How to repair foam roof blisters. Membrane roof cut away the membrane that has lost adhesion replace any wet insulation with like material and replace. Moisture trapped in spray down foam due to deterioration or loss of protective coating. Blisters are fixed as a part of a routine roof re coat. Foam roofs take a beating from our phoenix sun.
There are a few ways a contractor will repair a blister. What to watch for roof coating blisters in ponding water areas are due to moisture permeation from above. Roof coating blisters in areas of adequate drainage are usually coming from below. Use your polyurethane caulk to fill in the opening where the blister was removed.
In this first picture it identifys a golf ball size blister. Use a putty knife to pry up the blister. Cut the blister out using a razor knife bread knifes work the best. The polyurethane will need to cure before you seal the repair.