Time to check your roof seams. I just did mine and found for the first time in 3 years of ownership, a little spot over my bedroom slide coming loose. You can't check with just a visual inspection, you must press the fiberglass to see if it seperates.
Cleaned the seam, resealed it with some Dircor self leveling RV caulk and I'm good to go. Hitting the campground this weekend-Hoo Rah!
Eternabond can be used as a permenant solution if you choose.
2007 Winnebago Journey 39K Freightliner Chassis, Cat C7