Rv Roof Blister Bubble

Then i proceeded to put two coats of sealer on the entire roof.

Rv roof blister bubble.

This area can fill up with air or water to form a blister which looks like a bubble on your roof. In bituminous systems voids can be created by improper adhesion during application. These bubbles of trapped air moisture can be caused by a variety of issues which are all avoidable if the roof design is correct and the membrane is correctly installed. Roofs over cathedral ceilings often blister because they are likely poorly vented and collect moisture from the interior.

Whilst bubbles or blisters on a one piece epdm roof can be unsightly they will not cause the rubber membrane to fail. Maybe 25 to 30 total anywhere from dime size to half dollar size. A roof blister is a raised area where there is a loss of adhesion of the roof. The rv manufacturer simply didn t apply the adhesive evenly or left some dirt on the roof that the adhesive couldn t stick to.

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. Well long story short i done a pretty major patch in about a 2 foot square area. The blister is in the membrane itself and not under it because if you scrape it you see white rubber underneath. Membrane systems are most susceptible to blistering because blisters are formed by voids between the plies or at the point between the substrate and the membrane.

I had not paid attention before but i have noticed that there are little blister looking and feeling places throughout the roof. Blisters are mostly about 3 8 with largest about the size of a quarter. Causes of blisters all conventional low slope roof systems experience blisters in some form. Look for water squishing out of small openings as you walk the roof.

Vapour from contact bonding adhesive. It was very hot and humid this past summer and i wonder if this. I have extensive blistering on a 2 year old elkridge dicor roof.