I have bubbles all over the roof and they don't really concern me. The part about this particular spot is that it is at the edge where the fiberglass side wraps under it. I'm able to push the fiberglass skin down in the bubble about 1/2 inch or so. I guess I'm wondering also if the fiberglass should be stuck to the roof under the rubber roof. The bubble runs about the length of my hand long, and about 2 or 3 fingers wide.
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