Originally Posted by Maggie01
SNIP ... take 1/2" tongue and groove plywood and prime and paint it on all sides to seal it, then lay it on the floor and then screw the plywood down on the edges going through the insulation, which would secure them too, then apply top flooring, (probably laminate click together strips). ... SNIP
Please read the installation instructions on your flooring. Some products recommend that they be installed over bare wood, not painted wood. If yours is like that, you will paint on the bottom and the edges only. The product we are installing (Alure ISO-CORE vinyl planking) is one that recommends installation on bare wood surfaces.