Reply by xedos

What s on the other side of the wall?

A carpenters way to do this is cut a notch in the stud and either shim (if bowed in) or push it in and toe nail it.

However, you risk damaging the wall material on the other side.

So do what bold1 said. Tilers commonly float out uneven walls and floors.

Your other option is sister nailers on to the studs and bring it out level.

- Robert

I have read about all these methods but I don t think they will work for this particular situation
If I run a straight edge (8 level) across the studs I am seeing different situations in different areas
the above will fix a caved (C shape) stud but not one ore more that have an S profile

- MiniMe

Robert’s advise on sistering will absolutely work.

Two strings crossed in an “x” will give you a better picture of what’s going on over a broader area.

LVL studs are well worth their cost for tiled walls. Especially mosaic tile.

DO NOT use thinset as to fill in gaps, depressions ect. No thinset is rated or warrantied for such purpose.

If you can still find a tile setter that does mud work , you wouldn’t have to do anything except make the call. And pay. He’ll make the wall flat and plumb regardless of how knarly your studs. Hard to find those guys these days though.