My RV mechanic, who weighs about 275, was looking at my fridge today and noticed the floor in my '13 Siesta adjacent to the lav is soft. I keep my rig in climate controlled storage off season and have never noticed water intrusion. Roof penetrations are meticulously sealed,
He's recommending floor replacement, an all winter job, for $20K... not outrageous to my ears since he'd have to gut the interior, repair, then reassemble. I'm happy with the Siesta and think it would cost me a lot of $$$ to get something else.