I ended up putting down 12x12 stick down Anderson floor tile. It was a lot of trimming took 2x as long as expected, but looks great. Wife picked lighter color brightens up inside & hides dirt. I totally recommend painting wood floor for best adhesion, we just used primer. I had upgraded from missing booth on our used TT to craigslist rv table & chairs so filled in holes an patched floor screwholes etc with floor repair stuff. Going to do trim shoe mold. Removed toilet an vents, reworked vents so duct metal inside not on top of subfloor. I could see myself making error with sheet material like you used, so went with tiles. Try to post pictures. Works for us.