Fiberglass roofs
Our Motor Home has a fiberglass roof, which I really like, as it is all one piece. Do any of the current builders or coaches still have these?? I have seen a lot of damage and failures on the rubber...
Forum Discussion
msmith1199 wrote:
Okay Doug I get it. The roof bubbling is not because the glue failed. It's because the air caused the glue to fail?? Was I wrong because I used the word glue instead of adhesive? Isn't glue an adhesive? Either way didn't the glue fail and cause the roof to bubble???
No, Adhesive or glue, it will not cause bubbling if it fails. The bubbling is caused because air is getting in somewhere and getting under the Rubber and bubbling it up. You would be amazed at how small (less than a 1/4 inch) gap anywhere in the front area that is not correctly sealed and allowing the Air in transit to get under the rubber. Of course, the longer this continues to happen the larger the bubble and amount of membrane comes loose from the existing adhesive. Eventually the force of the air will rip the rubber away from the front Cap and the rubber will flap and no longer bubble. Usually we find the area where the sidewall awning rails are not correctly sealed and there is that small 1/4 inch hole allowing road wind to get in. This will not leak water in but allow wind to get under the rubber. Also this can happen when the EPDM is incorrectly replaced and they did not insert the membrane UNDER the Cap or front metal rail. Doug
