Air Bubbles in Rubber Roof

[Festus2]

A friend of mine just purchased a new '09 Keystone 5th wheel and noticed that there are two bulges which appear to be air pockets on the rubber roof. These bulges are located near the front part of the roof near the middle and are about 7-8 in long and about 2 in wide.
We are certain they are not caused by high temperatures as the weather in our area has been cool and wet since he purchased it.
He was wondering if the rubber roof membrane is glued down over its entire area or does it lie on its own and merely fastened or glued along the edges?
Is this something he should be concerned about? Do these bulges come and go? Any comments ???

[K&Gs3400RL]

I remember we had a few on our second cougar, and think I remember the service tech telling me not to worry about it, But I would call just incase.

[Terrydactile]

My Keystone owners manual states that small sections of rubber may not be adhered to the sub structure and that this is normal. The problem to me is the definition of "small sections". I would have the dealer look at it next time your in.

Until then keep an eye on them because if they get larger that may mean that air is getting under the skin and balloning the rubber up. I have heard of some folks having this issue but it also means that if air can get in so can water.

[rjsurfer]

The small ones I have on my Cougar have not gotten any bigger over the last few years, not a big deal.

I guess you could make a small hole in them to inject some glue then press them down until dry.

Ron W.