Proud owner on a 2008 x139 here !
Last month I noticed bubbles on the ceiling of the bathroom next to the vent (see picture). I cut the delaminated white board membrane.
From the hole of the vent , it looks to me that the ceiling is made from a thick plywood...but I know it's not the case. The back area (where the water was stuck) seems to be hollow behind the backing.
Is it nomal or my ceiling is completely rotten?
Can I just change the ceiling plywood without removing the roof plywood ?
Thank you !!!