The tile in my shower floor got torn apart
use a stanley knife to scrape out the grout.remove the tile using a hammer and a bulster or a old chissel always work from the middle avoiding damage to the other tiles.next use the hammer and bolster to chip up all the old adhesive next spread the new tile adhesive on the new tile lay it and check that its not sticking out in front of the other tiles.make sure its level with them.once dry after a thew hours then you can grout it.
You will have to chip out the damaged ones and replace them. After you grout be sure to apply a grout sealer. These links will give you some guidelines.
DIY doc is correct, but I would add that if this condition has been there for a while, there is the possibility that the floor under the tub is rotted from getting wet everytime some took a shower. I recently had a simular problem in a kitchen of a friend. When I pulled up the tile the floor was so bad that I could stick a screw driver through it with little difficulty. Pulling up the rotted floor boards i discovered that the sub-floor was rotted also. After a little investigating I found a leak in a water line going under his dishwasher. His wife never told him because she thought she was using the dish washer incorrectly. (yes, she is blonde) We had to replace all the flooring in the kitchen
Without more detail; I have to ask your definition of Torn Apart. I'll assume you mean separated from the substrate? Certainly it would help to know WHY? It would also help to know what the substance of the substrate is; the method of tile install; type of mortar (mastic) and the general condition of any tile that remains in place. Do you have extra tile? Do you have tools such as a Diag. Grinder; you might use to remove old mortar and grout for the substrate and back of each tile piece? I'm remediating 11,000 sq. ft. of tile now; installed improperly in a commercial building basement that floods. Tedious work; but do-able. Steven Wolf
