Onetwo just had a great tip re drilling into the slate tiles in the bathroom (copied below).
The only thing I’ve discovered is that (i think) we have metal studs (instead of wood). I’m about to try and wall mount a TV (if anyone on the A line happens to have already discovered where the studs are in the master bedroom – that would be awesome! )
“To drill into the slate walls in the bathroom, you will need a diamond or carbide
tipped drill bit. When drilling be careful not to put too much pressure on the
drill bit or you may crack the tile–let the bit do the work for you. Also, if you
keep the tile and bit cool with water the bit will last longer. It takes a while
to get through the tile, so be patient. Finally, use hollow wall anchors to keep
your fixtures in place.
I installed several fixtures in my bathroom without cracking any tiles–good luck!”