Before you lay any sort of tile whether it is stone ceramic or peel and stick vinyl you must prepare your concrete floor to ensure that the tiles will go down properly and stay where they re.
How to lay a ceramic tile floor on concrete.
To install ceramic tile over wood the wood surface must be structurally sound enough to support the weight of the tile.
Chipboard cushioned vinyl flooring particle boards of any type oriented strand board osb interior grade plywood tongue and groove planking and hardwood floors are unsuitable substrates for direct installation of ceramic tile.
Lay the tiles into the mortar and using the spacers make sure you are running even with the chalk line.
This will help prevent cracking of tiles.
Installing over wood.
Installing tile directly on concrete.
You can purchase it in sheets or in liquid form.
Purchase an anti fracture membrane to lay over your leveled concrete.
As you move on to the subsequent rows use the spacers to keep your pattern square.
Yet this application does make sense since concrete is heavy solid and is typically thought of as an unbending uncompromising material.
Opt to cut sheets of ditra membrane to fit the area you are tiling.