Hello all, my wife and I have been kicking around the idea of buying our first RV. We have been retired for about 2 years now and this option has been on our minds. Originally we were leaning towards ...
The membrane itself is typically warranted for 15-20yr. Very rare for the membrane to actually leak (assuming you don't poke a hole in it with a branch or similar)
It's the seams where you cut into the membrane to put in hatches and other items and along the edges where leaks typically happen.
Your last statement is correct but no manufacturer I've heard of suggests the caulk/sealant lasts forever. In fact, they typically won't honor warranty work if you haven't been keeping up on it.