RV Repair: Wall Delamination Repair, interior paneling, window leaks

Question
87 27' shasta with rot and delamination issues from window leaks.  They haven't been sealed in sometime.  I have peeld interior paneling off and only see insulation foam.  Can I repar delamination or just put up new interior paneling. Is it possible to reattachexterior walls?

Answer
Hi Russ.
That is a hand full. The outside skin was glued to the foam which was attached to the paneling. The water leak destroyed the bond between the three materials. Getting a bond to the outside wall is almost impossible without using fasteners from the outside. Having it look good when finished is the hard part but "do-able". You'll find that the outside skin has expanded and won't want to lay flat. So you'll still end with a lumpy wall. Good Luck and go slow.
Thom