Score and Break Out Proud Drywall So Door Casing Sits Tight to the Jamb

The Problem

Drywall that finishes slightly proud of the door jamb is everywhere — a heavy coat of mud at the corner, a jamb set a hair deep, and now the casing teeters on the high drywall instead of sitting flat. Nail it anyway and you get a rocked casing with a gap at the jamb line, right at eye level on every door.

The Technique

Make room behind the casing where nobody will ever see it.

1. Hold the casing (pre-assembled, in this carpenter's shop) in position and mark where it will sit on the drywall.
2. Mark a second line inside that footprint, then score along it with a utility knife. The score is the fence — it stops the drywall from breaking out any further than you want.
3. Crush and break out the drywall face between the score line and the jamb with a hammer, removing material until the casing drops in tight against the jamb.
4. Nail it off: 18-gauge brads into the jamb, 16-gauge nails through into the framing.

The relieved zone sits entirely behind the casing — the trim covers its own surgery, and the joint at the jamb closes up tight.