I saw this years ago where a homeowner left the plywood subfloor as her real floor just as the workers left it with a good coat of sealer. I want to rip out our bedroom carpet and install plywood over the subfloor. Then I plan to paint a faux finish to resemble 12x12 tiles. Hubby thinks I'm loco. Will I need to place 4/8 panels crossways of the subfloor sheets? Should I nail or use screws. I guess I'll do it myself like all my other projects. Thanks for any help.