[JavaBrewer]

Demo the floor is the only way to proceed here. BTDT several times however all my homes were on concrete slab. Tile on wood subfloor should have a concrete board screwed/nailed to wood and tile on top of that. When I was younger and foolish I thought I could remove first floor tile myself with a demo hammer and wide chisel...first couple tiles came up whole with first whack...winning I thought. The rest of the tile came up in quarter sized pieces. Terrible job and my hands & back paid for it. Broken tile & mortar is heavy, I was putting into a wheel barrel to cart into the back yard. Current house I hired floor demo crew who came in with air chisels, charged me something like $1.50/sq ft and they were done in 2 days and hauled away the mess (travertine). They also cleaned the floor and leveled for me to prep for hardwood and tile that I installed. Best money I have spent.