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