Repair Foam Roof Blisters

Polyurethane foam roofing can sometimes develop blisters the most common cause of which is due to the presence of moisture.

Repair foam roof blisters.

Causes of blisters all conventional low slope roof systems experience blisters in some form. Unnecessary repair attempts can result in leaks and premature roof problems. This area can fill up with air or water to form a blister which looks like a bubble on your roof. If left untreated a blister can grow larger and allow more moisture to get in so that the problem gets worse until more extensive repairs and possible replacement is necessary unless it pops.

If there is traffic on the roof fix it. The majority of blisters do not pose a threat to the integrity of the foam roofing system. Spray foam spf is not a roof. This article provides some guidance on whether or not to repair blistered areas on different types of conventional low slope membrane systems.

Foam roofs take a beating from our phoenix sun. No traffic you may want to leave it. This also applies to blisters in built in and single ply membrane systems. Type a blisters should always be repaired as soon as possible.

What to watch for roof coating blisters in ponding water areas are due to moisture permeation from above. Repair in there is heavy traffic. Also the roof will be cleaned thoroughly first. Type d typically left in place.

If the coating is secured over a dirty surface it can pull away from the foam and possibly peel away from the roof. Make sure you cure the cause type b blisters. With proper care and repair your foam roof can virtually last forever. Most industry warranties do not cover spf blisters as they generally cover only the water tightness of the polyurethane foam coating.

Moisture trapped in spray down foam due to deterioration or loss of protective coating. Roof coating blisters in areas of adequate drainage are usually coming from below. It is an insulator not a waterproofing system. Foam blisters fix it or leave it.

Type c typically left in place. A roof blister is a raised area where there is a loss of adhesion of the roof. If repairs are warranted it should be left to the roofing contractor to properly repair them. Spf spray polyurethane foam is a mixture of two liquid compounds isocyanate and polyol which expands to 20 or 30 times larger than its original size by creating bubbles or air pockets.

Unnecessary repair attempts can result in leaks and premature roof problems. Phoenix foam roof repair. The majority of blisters do not pose a threat to the integrity of the foam roofing system.