I am installing a 12×12 tile floor in a kitchen. Part of the kitchen has been added on and has 3/4 T&G plywood. The old part has 1/2 plywood for the subfloor. The top of the 3/4 lines up with the top of the 1/2. The floor will have radiant floor heat of the cable type which will increase the amount of thinset under the tile by about 3/16.
I am deciding on what kind of underlayment to use: 1/2″ cement board or 1/2″ Hardibacker. I have heard that the Hardibacker is easier to work with than the cement board.
I am looking for advice on what product to go with.