Repair a Drywall Hole in a Corner

Corner damage is trickier than flat-wall holes because the corner itself is structural—it's where two sheets of drywall meet at an angle, usually reinforced with metal or paper bead. When that corner takes a hit from a door, furniture, or impact, you're not just filling a hole; you're restoring both the angle and the surface. The key difference: a flat-wall patch relies on drywall behind it for support, but a corner relies on the bead to hold its shape. If you ignore this and just mud over it, the corner will slowly flatten, crack, and look worse each season. Done right, a corner repair is invisible—the angle stays crisp, the surface stays flush, and you can paint over it without second thoughts.

1. Cut Out Damaged Bead. Look closely at the corner to see what you're dealing with. If the corner bead is dented but not torn, you may be able to work around it. If it's cracked, split, or peeling away from the drywall, you need to cut it out. Use a utility knife to cut a V-groove down the center of the corner, about 6 inches above and below the damage. Cut straight along both sides of the corner, then peel away the damaged section of bead. Cut back to solid, undamaged bead above and below the hole. Clean away any loose paper, mud, or debris with a putty knife.
2. Fit Fresh Bead. Measure the length of the gap you've created. Cut a new piece of corner bead (metal or fiberglass) to length using a utility knife or tin snips. Test-fit it in the corner—it should sit flat against both walls and slide smoothly into the gap. The bead should overlap the existing bead by at least 2 inches on both the top and bottom. If it doesn't sit flush, the corner isn't clean enough; go back and cut it out further.
3. Bed the Bead. Use a putty knife to apply a thin bed of joint compound along both sides of the corner where the new bead will sit. This adhesive layer helps bond the bead to the drywall and fills small gaps. Apply just enough to create a 1/8-inch thick layer—too much and it'll squeeze out and create a mess. Don't worry about it being perfect; the bead will compress it as you press it in.
4. Seat Bead Firmly. Starting at one end, press the new corner bead firmly into the corner. Use your hand or a corner tool to seat it evenly along its length. Make sure both edges of the bead are in contact with the joint compound and the drywall. Work slowly from top to bottom, pressing as you go. You should feel the bead settle into place. If compound squeezes out around the edges, that's normal—wipe the excess away with a putty knife, but don't overdo it; you need some compound to have settled for the bead to adhere.
5. Spread First Coat. Once the bead has set for 24 hours, apply the first coat of joint compound over the repair. Use a 6-inch putty knife. Apply compound over the bead and along both sides of the corner, feathering it out from the center line at least 3 inches on each side. The goal is to create a smooth transition—the compound should taper to nothing at the edges, not end abruptly. Work in one direction along the corner, then smooth from the opposite direction. Don't try to make it perfect; the first coat is just foundation.
6. Smooth First Coat. After 24 hours, the first coat should be dry enough to sand. Use 120-grit sandpaper on a sanding block or pole sander. Sand the repair area gently, focusing on knocking down ridges and bumps. Sand along the corner to even out the edges. Don't sand aggressively or you'll break through the compound back to the bead. The goal is to get a smooth, even surface with no high spots. Vacuum or wipe away dust as you go.
7. Extend Second Coat. Apply a second coat of joint compound over the repair, feathering it even wider this time—at least 6 inches on each side of the corner. This coat should cover any remaining bead texture and blend into the surrounding wall. Use a 10-inch knife if you have one; it gives you more control and creates a wider, smoother feather. Keep the compound thin and consistent. The idea is to smooth and extend the blend, not build it up thick.
8. Refine Second Coat. After the second coat dries (24 hours), sand again with 120-grit paper. Sand more gently than the first time; you're refining, not roughing up. Focus on any ridges, lumps, or uneven spots. Sand the full width of your feather to make sure the transition is smooth from the repair into the surrounding wall. The repair should feel seamless to your hand.
9. Skim Coat Optional. If the repair still shows texture, compound buildup, or uneven blending, apply a thin final coat using a 12-inch knife. This is a feather coat only—barely any compound on the blade. Smooth it over the repair and fade it into the wall. Many pros call this the 'skim coat.' It requires a light touch but creates a nearly invisible repair. You don't always need this step; assess after sanding the second coat.
10. Polish to Glass. After the final coat dries (or after the second coat if you skipped the final coat), do a final sand with 150- or 220-grit paper. This is a light smoothing pass only. Sand in a circular motion, keeping pressure light. You're removing any remaining bumps, brush marks, or tool marks. The surface should be glass-smooth when you run your hand over it. Vacuum and wipe down dust completely before priming.
11. Prime and Paint. Prime the repair area with drywall primer. The joint compound is very porous and will absorb paint unevenly, creating a dull spot if you don't prime. Use a small brush and prime the entire repair area plus a few inches around it to ensure even priming. Let the primer dry fully (usually 1 hour), then paint with your wall color. Two coats of paint are standard for blending repairs. Paint slightly beyond the repair area to feather the color into the surrounding wall.