Leaky roof seam cause to delamination the 93 Santara skin

I did a 88 Pace arrow a few years ago. I took the whole side off, the windows, doors & fiberglass. Replaced the rotted wood with 1/4 inch plywood. It took me about a month to do it. I had to cut the fiberglass in half about half way back it was to heavy in one piece. I used laminate glue and drywall screws on the plywood & fiberglass, I had to use a few screws in the fiberglass. The framework was rusted, I used a gas tank coating on it. I did the roof with eternabond tape. Use a lot of the glue it soaks into the plywood, I had a few places that came loose after the sun worked on it.