2012 Montana 3400RL. Did 6 month and 20K miles in 20014. Cleaned the carpet when we got home in October. The dirty water was black so the DW BOSS... said the carpet had to go.
Puller carpet on floor, left it on the slides. When you have the carpet up check subfloor for loose screws or squeeky spots. Rescrew as needed.
I used 48" X 6" Vinyl planks from Lumber Liquidators that snaps together. It can be installed without glueing down but I glued everyother row. This product makes for easy install and looks like the Tiffan class A floor we saw at the Pamona RV show. No problem with the slides.
The DW loves it and so does the dogs. Happy Wife Happy Life.
Happy new year