I am laying 12″ X 3/4″ tile on a concrete slab next to a wood floor that is furred off the slab by 3/4″ of an inch. I know that typically, if a slab is flat and in good shape, you can set tile directly on the clab, but it will be about 1/2″ to 3/4″ too low relative to the finished HW.
Any recommendations on how to bring up the height of the tile? I have never done a morter bed before, and I fear that with my L-shaped, 12’x10′ room a morter bed would be a lot of work and I am likely to screw it up. Backer board doesn’t seem feasible since I can’t secure it easily to the slab.