Thanks for your reply. I checked the roof again today to get a little better idea of the situation, and I notice that the problem is the worse where the roof rounds down to the sidewalls. There is quite a bit of separation along this rounded corner from roof to sidewall, and then a few areas where it is separated on the flat portions of the roof. I don't have a copy of the warranty, but I doubt it is covered, I'm more interested in what I can do to make sure this doesn't become a future issue. Regarding the warranty, my motorhome still has the Ford 3 year 36,000 miles on the chassis, and this is good until August of 2010. The motorhome doesn't appear to have been abused, and it only has 16,000 miles on it, so it has seen reasonably little use. Do you or anyone have an email for the warranty or construction branch of Phoenix Cruiser? Thanks again.