I'm trying to salvage what I can of the tile around my tub. Our home was built in the late 1940's. The tile in our tub is 4 inch black tile, which I like. The problem is that there are a number of cracked tiles - about 20 or so. Some are in the center of the wall, and some cracks run parallel to the ground, across a complete row of tile. It looks like it all stems from a window that was replaced, which is where most of the cracks start/end. I attempted to chisel some of the cracked exterior tiles away, but quickly discovered that the tiles were set into about 1 inch thick wet concrete/mortar. This caused the next tile to crack as I chiseled. There is also a metal grid like thing set into it. I was told that I'd have to demolish the entire thing. Is this true, or do any of you know of ways to remove and replace these tiles?