I know nothing about your rig, but any noticeable sag implies the flooring plywood/particle board is not properly supported from underneath. A reasonably skilled person should be able to supplement the framing from below.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears;
--2016 Montana 3711FL, 40'
--2014 Wildcat 327CK, 38' SOLD
I think itís pretty common. The floor joists are too widely spaced and the floor material way too thin. When the foam between the joists gets compressed over time you get the sag. You will probably see it wherever people stand. The bathroom sink, the toilet, and near the dinette are typical.
If you have luan floor then its typical with that floor i have 2018 wildwood heritage glen 5th wheel that is soft in front of stove and its not from a water leak. you can here the top layer of 3 strand plywood cracking when you step on it.i have some what plan to fix it it will be summer time project as i live in mine full time.
Thanks, so it's not just mine.
I have an extended warranty on my camper, will they fix that under warranty ?
Don't know how we answer your question, since you provided no information on which extended warranty you have.
All I can say is look at the fine print, which is where most 3rd party extended warranties list their exclusions.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity