When I moved into my house the kitchen had a slate floor that was coming up all over the place. The joists are over-spanned and the person who installed the floor just put the tile right on plywood. It was doomed from the beginning. I have pulled up the tile with the intent of putting down some cheap crappy floor as a temporary measure until I totally remodel the kitchen at which time I am replacing the floor down to the joists, and actually a few of the joists themselves.
Ideally I’d like to just put a sheet of linoleum down, but there is thinset still stuck in places and it is a real bear to get off. I’ve gotten it all down to less than a 16th of an inch or so, but it’s still not good enough to put a sheet floor over.
I considered putting luan over it and screwing it down good, but am afraid with the unevenness, and lack of contact the floor will move around, perhaps ungluing the sheet flooring.
I’ve also considered putting thinset Between the plywood and luan to try to bond them and wind up with a thick piece of wood/concrete composite. That seems like a gamble. It might be stiff enough not to move enough to crack. Or it might not be, then I’d have little pieces of cracked off thinset between two layers of wood.
Any suggestions? Insight?
I don’t want to pull the plywood up since the cabinets, stove, dishwasher, and other things are presently sitting on it.