I need help to understand on flooring insulation.
I am ready to install a new solid hardwood floor over subfloor over crawl space cover with plywood. Even though I do have insulation under my subfloor/crawl space, I like to put an extra insulation layer between the plywood and the hardwood...
I currently have 1" wide oak hardwood flooring and would like to cover it with 3 1/2" wide cherry wood.
Do I have to put plywood down or can I install it directly over the old flooring?
what other prep do I need to do?