Hi all - I'm in the middle of a bathroom remodel - and fairly new to tiling. Need help deciding how to prep the floors...
Looked to be a fairly simple job - before the tear-out; House was built in 1939, and the HO wants a 32 inch wide tub & shower to replace the old 30 inch tub. The design calls for moving the toilet & sink plumbing - (if we don't move the toilet, it will only be centered 13 inches from the tub / glass shower doors... code requires 15...).
This presents two problems: 1) the current toilet drain is set into the '30's / 40's era black & white mosaic tile over mudset (a 2" deep box & filled with concrete), and 2) I need to remove or lower & level three inches from the existing mudset floor to give the new tub room to sit.
I'm hoping to avoid tearing out the entire concrete subfloor, if possible. (If not, please let me know...)
There's enough room between the joists to move the toilet drain - except that it's set into the concrete underlayment. So I need to cut out a 16 inch by 24 inch section of the concrete mudset to give the plumber enough room to work. Would a diamond blade on a skill saw do the trick? Or do I need something more specialized?
Next: The previous tub sat directly on a plank subfloor, and the old tile work ran right up to it. Looked good. But, those planks are 7/16 to 9/16ths of an inch below the level of the existing tile - and the mudset starts right at 30 inches from the joists. I need two more inches (minimum) to get the tub in and level. Initially, I thought I could chisel up about 4 inches of the mudset then refill it with concrete & float it level with the wooden planks - but that's turning into a pain - and I'm not sure it's the best method.
Anyone have any suggestions to this problem? Or is my best-bet going to be breaking up the mudset & starting over

?