CAN A PORCELAIN STONEWARE BE INSTALLED ON AN EXISTING FLOOR?
I should redo the flooring on the ground floor of my house (approx. 190 sqm). Can I apply a porcelain stoneware on an existing floor? Which thickness can you advise to use?
The overlapping can be done, observing the following precautions:
Check that the existing tiles are actually attached to the substrate (do not hear the classic vacuum sound).
After removing any tiles not well attached, it would be good to use an angle grinder (or even better a special sander) to damage the surface of the existing tiles, to improve the adhesion of the glue.
During the laying phase, apply the double layer both on the pre-existing tiles with grooved spatula and on those to be laid (with smooth spatula). Use a cementitious glue, possibly with a good elastic modulus, and make joints near the existing ones with silicone products.
If you follow these suggestions, probably your outdoor floor will not give you problems in the future.