: I am building a shower stall in a new addition which : will have a ceramic tile floor. I need to find out : what the material(s) under the tile needs to be and : what thicknesses they need to be. I presently have 3/4 : T & G OSB over 2×8 lumber at 16 OC in place and : nothing else. I am an amateur on my first try and would : greatly appreciate any insight you could provide me on : this one. : Thank You
