The floor is on a raised foundation and we were told that there are 2 options: float it on thin set or use a concrete back board. Is there any perference to one over the other? I don't want the tile to crack.
Use the concrete backerboard. If you float it on thin set it will crack. Period.
Float it on thin set. Concrete board is used for countertops, showers, tubs, e.t.c. The tile should be just fine if the house is built according to code. If you find spots that flex or move or squick when you step on them, you should fix these spots first. Good luck!!!
These answer are old there are at least three different kind of boards you can lay down instead of cement board they are lighter less expensive. Check with your local Lowes or Home depot they carry them and tell you which one is best for what you are laying, there is a big difference from slate and granite and just plain old ceramic tile
What is the floor material? Never heard of floating ceramic tiles. Wood? Use the backer board or use the old fashion method of 2 concret base. Concrete already? Lay right on top of it
I've never went wrong with cement backer board. Any flexibility and your grout will crack.
