I have an alcove tub surround. On the 90 degree outside edge where the tiled surface will meet the painted surface, how do I treat the joining of the drywall boards... someone told me corner bead will flare out the tile so don't use it... what would I use?
"J" channel on the drywall. It looks like a square bottomed J, and slips over the end of the drywall. Tape and mud around it to the cbu. If you are using a bullnose or quarter-round tile, you'll have a nice flat, square edge.
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013