Plywood floor. Inexpensive paintable floor. A pinner said "Did this in our house...we just put the sheets of plywood down and routed out grooves...then some stain and poly...its been ten years and still looks great and we love it..."
Installing Wood Flooring Over Concrete - Install a wood base, then the finish flooring. You can install a wood plank floor over concrete if you first install a layer of 3/4-in. plywood. We show you the best way to do it. By the DIY experts of The Family Handyman Magazine