I have a loyal client that wants a hard wood floor. There is ceramic tile floor over concrete. Is it possible to lay the wood floor on the tile with out removing the tile. He does not like a floating floor and I do not have the room to install a 3/4 subfloor with out raising all of the door thresholds. Or do I bite the bullet and raise all of the doors, bust up the tile, and do what I know how to do.