Tile Experts - Ditra or Backerboard for 1/2' Travertine Tile?
My tile contractor will be installing 1/2" thick travertine tile in my home. The existing sub-floor is 3/4" plywood. The game plan is to install 1/2" cement backerboard over the 3/4" plywood subfloor. A large notch trowel will be used to provide a 1/2" thick layer of thin set. This installation will give me a finished height from the sub-floor of 1.5". Being told this is what is required when installing 1/2" thick travertine material.
First, are you tile experts in agreement with this installation process when using backerboard?
Second, am I better off using the Ditra product and why? How would a Ditra insallation be installed when using 1/2" travertine? What would my finished height be using Ditra?
Lastly, will Ditra create a solid enough base for 1/2" thick travertine? 1/2' backboard will obviously create an extremely solid surface. Where as, the Ditra is a flexible material and it seems like there could be some movement when applied over a 3/4" plywood sub-floor. I know travertine material is more prone to crack than other types of tile so this is a real concern.
Any and all feedback will be greatly appreciated!