I have an 8"x8" ceramic tile floor in my kitchen. It was not well installed. There is no backer board. A few months ago, the water supply to the ice maker in my fridge leaked, the plywood underlayment and subfloor expanded, a lot of grout cracked or separated from the tile, and a few tiles cracked, too.
Most of the broken tiles were in a group in front of the fridge. I had someone replace them. He chiseled out the old tiles, got up some of the old thin set, put down new, and fit in the new tiles. Two weeks later, some of the grout in one small area is cracking and the tiles move up and down when I press on the edge. I think these are tiles next to where he worked.
I can get a lot of the grout out from around these tiles but to save them I need to get something rigid underneath, filling the gap and supporting the side of the tile. Any thoughts for something I can inject at the edge and force under the tile? Epoxy and thin set are too viscous and/or grainy.
http://www.lowes.com/pd_217371-68-37584_4294729418__?productId=3024887 seems worth a shot.