Cabover leaks - Would This Work

One thing that will help with front cabover leaks due to the front cabover window's seals - there's two of them ... the rubber one all around the glass and the sticky chaulk one between the outer frame and the outer RV surface - is to remove the window and while it's out use a good grade of construction tape to seal all the way around the sandwich opening between the outer and inner walls. Doing this, if a leak develops in either of the two window seals the water is kept either to the outside, or at least can only run down onto the outside of the inner wall where you can easily see it from the the inside. No water can get in between the cabover walls sandwich structure to rot things where you can't see it.

We had this done to ours when the window was replaced several years ago, just in case. Sealing of this window is so tricky that it took the professionals three separate whole window assembles to get it installed without leaking using hose testing. The final two complete cabover window assemblies were factory ones direct from Winnebago.