We will be using 12" x 12" honed / filled travertine tile for our kitchen / dining room remodel - about 300 sq feet. This will be an install over a 50 year old concrete slab. I have a fair amount of ceramic tiling experience - but have never used travertine. We intend to tile before teh cabinets are installed, placing eh tile under where the cabinets will be. From what I have read it appears we should use a Ditra membrane.

The current floor is inexpensive ynal tile which we will take up. Do we need to prime the floor? What type of mortor / cement should we use to lay the membrane? Then what about toset the tile?

I am also still unsure about how / with what / when to seal the tile.

Anything special about grouting?

Any and all help will be greatly appriciated.