Foam Roof Bubbles

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.

Foam roof bubbles.

Although this is more common on flat roofs shingle bubbles can occur in pitched roofs as well. Bubbles across your foam roof will look like small or large rounded domes that stick up from the surface. Spray foam spf is not a roof. The top coat is an acrylic or an acrylic with granules imbedded in the coating.

This area can fill up with air or water to form a blister which looks like a bubble on your roof. These bubbles are often referred to as blisters and they are a sign that moisture has reached the inner layers of the polyurethane material. A roof blister is a raised area where there is a loss of adhesion of the roof. Foam roofs get bubbles and blisters sometimes and need to be repaired.

Chas the owner of the non gone able roofing once told me that foam bubbles are sometimes caused when the foam got applied in two thin layers. Water buildup combined with heat from the sun can cause shingles to blister and bubble. Does anyone know if this recoating work must be done by the professionals or it is a diy work. This is a quick video showing you how do repair the foam bubbles and blisters on your flat roof.

In the top 10 foam roofing myths section it mentioned to maintain a foam roof we may need to periodically adding re coats to protect the roof from prolonged uv exposure.