Hi Dennis,
This sounds like what the previous owner of my coach had happen to him. I’ll quote from the maintenance records he left with the coach as I have no personal experience with the issue. From the Lazy Days invoice of 12/14/2011:
“Recall-Warranty Check – Slide outs marking up floors dragging/ black will not come off floor
Correction – Found floor coming apart under room. Removed sofa dinette table, pulled back carpet. Drilled hole & installed T nut on bottom side & found do to floor pulled apart, bolt too short. Had to install longer bolts & swap out after floor pulled up to it. Reinstalled all items removed. Floor tiles had rub marks that I could not clean off.”
This seems to be a common issue in some coaches. A simple t-nut can fix it if your issue is the same as mine was.
Another poster in a different forum said that Fleetwood "have a Kit (#406190) which is a T-nut design ($24.00)." You could check with Fleetwood customer service.