Foam Roof Bubbles

Flat roof blisterts bubbles occur as the direct result of hot air that rises from the crawl space between the top floor ceiling and the roof deck of the home.

Foam roof bubbles.

Look for water squishing out of small openings as you walk the roof. Coatings on older foam roofs that have not been well maintained will result in blistering water intrudes into the foam and can t be seen when recoating. This means that air bubbles are locked into the foam and moisture. Foam blisters type d type d.

Can occur in just about any recover. Foam roofs are made from spray foam polyurethane by mixing two different materials together. The roofing material is a closed cell foam. Liquid applied coatings should be installed per the manufacturer s instructions which may include a waiting period.

There are four main reasons why blisters bubbles occur on your flat roof. It is an insulator not a waterproofing system. Water can permeate foam asphalt and decking and is very hard to dry out. For small repair areas it is a common practice to apply the coating immediately after the membrane repair.

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. We had a bubble on our roof a couple years ago and there s a new one forming near the old repair 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. With weather changes roof blisters may pop up on your commercial flat roof. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing.

These materials are called isocyanate and polyol and the finished product is similar to the spray foam used for home and business insulation. Similar to type c as they are very rigid and not readily detectable by visual inspection. Foam roofs get bubbles and blisters sometimes and need to be repaired. This is a quick video showing you how do repair the foam bubbles and blisters on your flat roof.

Causes prevention and repair as weather changes from season to season it s important to keep up with your maintenance plan to keep your roof in working order. These type blisters are often large 9 square meters one roofing square or larger and located between felts or other components of the original roof. Does anyone know if this recoating work must be done by the professionals or it is a diy work.