I purchased discontinued porcelain tilees and used them on my kitchen floor. To my surprise some of the tiles have been cracking. Why would new tiles crack? Now I need to replace the cracked tiles and I am unable to purchase new ones since they were discontinued. What do I do? Sincerely, Sharon
It is unfortunate to hear that your newly renovated kitchen floor is cracking. Discontinued tiles doesn't mean that anything is wrong with the tiles. So, I wouldn't worry about that. The tile store was most likely bringing in new inventory. Porcelain is a very durable tile for floor applications since it is madeup of water, clay and quartz ferrous sand materials. It is common for a ceramic/porcelain tile to crack if the foundation of your house is settling or if it was improperly installed.
My thought is that your contractor did not properly prepare the subfloor. You want a level subfloor for ceramic /porcelain flooring. Otherwise it proves unreliable, thus the cracks you have been experiencing.
Professional tile contractors that warrant their work over long periods of time mud set their floors. "Mud setting" is the ideal substrate because the mud set provides a flat and level floor, a water resistant base and adds structural stability to new and especially existing old floors. When I renovated my downstairs space (see Zen Modern blog), the subfloor had a huge bow across the room and it required a mud set floor, especially since I purchased 12" X 24" porcelain tiles. (see pic below)
Unfortunatley your kitchen space is done and I really doubt you want to start over and rip up the entire new floor and fix the sub floor. Perhaps, your contractor can come back and rip up the problematic area and level it off so that future tiles do not crack.
The other problem you face is that you cannot purchase new tiles since you purchased discontinued tiles.Take a sneek peek under the refrigerator, cabinetry or island to see if any of the tiles were installed under there. Your tile contractor can use those tiles for the subfloor repair and solve your cracking issues!
Best of luck,