bubbles in fiberglass

hello have a 2013 big horn when the sun hits the road side of the camper three big bubbles appear. one on the rear wall behind slide.one on the rearward side of the slide and on in the wall before the slide out. you can push fiberglass in and it feels tacky behind it and pops back out.also when sun is off the side of the camper the bubble goes away.anyone else heard or have this issue

Yes, I had the same issue on my Greystone. It is delamination of the fiberglass skin that is bonded/glued to wood backer. Mine would bubble when the sun heated it up then when cooled it would shrink back.


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My 2013 Bighorn is doing the same thing - when the sun hits the bedroom slide there several bubbles - but when evening comes and the slide cools down the fiberglass is flat as a pancake. I can not find where there is any water intrusion on mine? My bedroom slide faces the west - so I clip a Harbor Freight Silver Tarp on the bedroom slide and it seems to stop the bubbles during the day.

If you are sure you have no water leaks then the only other thing is a bad bonding job at the factory