bubble on roof help needed

[jeeptj2005]

Well we're new to hybrid's and travel trailers and we are hoping you folks might help us out . We just bought 2004 shamrock 25bh. Its appeared to be in great shape with no signs at all of water leaks inside the trailer ,,, but earlier today i was cleaning the little gutter 'and I noticed a bump on the edge of the roof about 10 inches wide by 16 inches long . At first a thought it was a air pocket ,but when I pressed on it , its feels like plywood that has been wet at some point and dried out started to delaminated . What should we do ?

[milzat]

The only way to investigate this area is to lift the roof material.
You'll need to remove the molding that retains the roof material and lift it up a bit to see what the problem is. This molding is usually on the sidewall, at the roof line.

Handling Moisture in RV's