We're redoing a wall in our kitchen because it was too uneven to lay our countertop-to-ceiling tile backsplash.
The base cabinets and countertops have been installed already, and there are no upper cabinets, so we decided to only redo the part of the wall from the countertop to the ceiling. We're going to install cement backer board directly on the studs.
To even out the wall, we'll need to shim the backer board up to a 1/2" in places, including along the horizontal cut line along the countertop.
I understand we should tape cement board joints with alkali-resistant fiberglass mesh tape, but I'm not sure how to treat the joint between the cement backer board and the existing drywall because they won't be flush with one another.
Can we tape the joint with an uneven rift? Or is there something else that should be done?
I'm not worried about it being visually correct because the recessed existing drywall will be hidden behind the countertop and base cabinets. I'm more concerned about anything that might cause cracking in the tile grout down the road.