i'm replacing my tub area wall with cement backerboard. how do i butt the backerboard end with the textured drywall end? and how can i remove the old drywall joints (the area with the joint tape)? that's where i will butt the concrete backerboard.
use the same nylon joint tape and the thinset that you used on the other joints of the backerboard. aplly the thinset as smooth as possible. when it dry you can apply a layer of drywall joint compound over the thinset. you dont have to over lap the tile over the joint. after the drywall compound dries, sand and finish like the rest of the drywall
To join the cement board and the drywall, use the same mud you use to join the cement boards.. Then overlap the tile onto the regular drywall by a few inches to hide that joint.
