Foam Roof Bubbles

Bubbles across your foam roof will look like small or large rounded domes that stick up from the surface.

Foam roof bubbles.

Spray foam spf is not a roof. The second layer wouldn t stick to the first so the bubble forms when the two separate and air gets between them. These bubbles are often referred to as blisters and they are a sign that moisture has reached the inner layers of the polyurethane material. 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.

The top coat is an acrylic or an acrylic with granules imbedded in the coating. It is an insulator not a waterproofing system. This area can fill up with air or water to form a blister which looks like a bubble on your roof. Foam roofs get bubbles and blisters sometimes and need to be repaired.

Although this is more common on flat roofs shingle bubbles can occur in pitched roofs as well. A roof blister is a raised area where there is a loss of adhesion of the 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. Foam roofs are made from spray foam polyurethane by mixing two different materials together.

Water buildup combined with heat from the sun can cause shingles to blister and bubble.