Drywall compound or thinset
I have a few other posts in the fireplace and remodel forums related to this project in general, but I have a really specific question. I am replacing the tile around the fireplace. I removed the drywall and tile and have and put up concrete board, sealed it to the fireplace and am good to go. The only thing is that the CBU is about 3/16" max recessed from flush from the original drywall. What should I use to fill in the difference before re-tiling, thinset/mortar or just a few coats of drywall compound and primer?