Rv Roof Blister Bubble

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

Rv roof blister bubble.

Blisters are mostly about 3 8 with largest about the size of a quarter. I have extensive blistering on a 2 year old elkridge dicor roof. My roof is tan and rv has been left in central florida the past two summers. Well long story short i done a pretty major patch in about a 2 foot square area.

Maybe 25 to 30 total anywhere from dime size to half dollar size. Causes of blisters all conventional low slope roof systems experience blisters in some form. The most common cause of roof bubbling is poor installation of the roof. Roofs over cathedral ceilings often blister because they are likely poorly vented and collect moisture from the interior.

Look for water squishing out of small openings as you walk the roof. Whilst bubbles or blisters on a one piece epdm roof can be unsightly they will not cause the rubber membrane to fail. 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. 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.

The blister is in the membrane itself and not under it because if you scrape it you see white rubber underneath. Roof bubbling is just what it sounds like spots where the rubber has lifted off the surface of the roof and formed a bubble or blister. Vapour from contact bonding adhesive. I had not paid attention before but i have noticed that there are little blister looking and feeling places throughout 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. 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.