Rv Roof Blister Bubble

Well long story short i done a pretty major patch in about a 2 foot square area.

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. Vapour from contact bonding adhesive. Look for water squishing out of small openings as you walk 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.

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. A roof blister is a raised area where there is a loss of adhesion of the roof. In bituminous systems voids can be created by improper adhesion during application. Then i proceeded to put two coats of sealer on the entire roof.

I have extensive blistering on a 2 year old elkridge dicor 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. 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.

Whilst bubbles or blisters on a one piece epdm roof can be unsightly they will not cause the rubber membrane to fail. Causes of blisters all conventional low slope roof systems experience blisters in some form. 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. Roofs over cathedral ceilings often blister because they are likely poorly vented and collect moisture from the interior.

The most common cause of roof bubbling is poor installation of the roof. 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.