#1, 8" wide joist would be the bare minimum size for even a short span.
#2, I can not imagine adding a third layer of flooring being a good idea.
That's going to throw off all the doors, baseboards, kitchen cabinets, ECT.
#2, I can not imagine adding a third layer of flooring being a good idea.
That's going to throw off all the doors, baseboards, kitchen cabinets, ECT.