Learn More › “Mudding,” the process of applying multiple thin coats of drywall ... a thin coat of mud to both sides of an inside corner, making sure to work it all the way into the center.

The drywall will bend inward slightly, creating a recess for the tape and mud. Tape recessed butt joints ... knife, or better yet, a 14-in. knife. The best way to handle butt joints is to avoid ...