hello, i'm new to the site and was hoping that i might get a bit of advice. i just purchased my first house and i'm in the process of gutting my bathroom. the house is an old cape, built in '21 and from what i can tell, which isn't much, it still has many of the original bathroom fixtures with a few upgrades. anyway, i've got the old cast iron tub out and the surrounding shower guard and fiber board. despite discovering a colony of carpenter ants and a horrific plumbing upgrade i noticed that the subloor is almost three inches below the tile floor. there appears to be almost a two inch wetbed topped off with the strongest one inch thick mortar/cement mixture securing the tiles. the tiles are those little octogonal one inchers that just completely shatter with any amount of force, either from a chisel or hammer. i've tried an air chisel with the tank cranked to 120lbs. that doesn't work. i'm nervous about using a sledge or pick axe because i don't want to stress my kitchen ceiling any further (already cracking through the tape). i'm at a loss. perhaps drilling relief holes with a cement drill bit and breaking it out in sections? any help would be greatly appreciated. thanks.
No easy solution here, if the mud is to come out, a lump hammer or small sledge will do it, start in one corner and work your way out, messy backbreaking work, wait till you get down to the wire lath.:D