How to Repair Damaged Drywall Corners and Beads

Corner bead is the metal or paper strip that runs along every inside corner and outside corner in your home. It takes a beating—door swings, furniture bumps, seasonal settling—and when it dents, cracks, or separates from the drywall, it shows. A damaged corner looks sloppy and can get worse if water finds its way behind it. The good news is this is a straightforward repair that doesn't require special skills, just patience and the right approach to feathering compound smoothly. The key to invisible corner repair is working in thin layers and understanding that you're not filling a hole—you're building a smooth transition that reads as part of the wall. Whether you're dealing with a crease that won't tape properly or a bead that's buckled away from the corner, the fix follows the same logic: expose the problem, replace the bead, and blend it back to flat.

1. Spot the Hidden Damage. Run your hand along the corner to feel exactly how much of the bead is damaged. Mark the bad section with a pencil, extending at least 6 inches beyond the damage in each direction. This gives you room to feather compound smoothly without it looking patchy. If the bead is dented but still bonded, you may only need to mud over it; if it's separated or torn, you'll need to remove and replace it.
2. Strip Back to Bare Bead. Use a putty knife or margin trowel to scrape away joint compound back to the bead. Work carefully to avoid gouging the drywall face. If the bead is metal and damaged beyond 6 inches, cut it out with a utility knife on both sides, then pry it away. For paper bead, simply scrape the old compound; the paper usually comes off with it. Once the bead is exposed, vacuum or brush away all dust and debris.
3. Seat Fresh Bead. Cut a piece of bead slightly longer than the damaged section. For metal bead, use tin snips; for paper, use a utility knife. Apply a thin bed of joint compound directly to the corner using a putty knife, then press the new bead firmly into it. The bead should sit centered in the corner with no gaps. Wipe away excess compound from both sides with your trowel, leaving just enough to hold the bead in place.
4. Feather Wide and Thin. Once the first compound coat holding the bead has firmed up (usually 2-3 hours), apply a wider base coat using a 6-inch taping knife. Spread compound in one smooth motion, feathering it onto the wall face. The goal is to cover the bead completely and extend the repair zone out at least 6 inches on both sides of the corner. Keep it thin—thick coats crack and take forever to dry.
5. Refine and Extend. Once the base coat is fully dry, sand it lightly with 150-grit sandpaper to knock down ridges and bumps. The surface should feel smooth, not sticky. Dust off completely. Apply a second, thinner coat with an 8-inch knife, again feathering well beyond the first coat. This coat is about refinement, not coverage—let the first coat do the heavy lifting.
6. Seal Before Paint. Sand the second coat with 220-grit paper, feathering the edges one more time. You're looking for a surface that feels like the surrounding wall. Wipe clean with a damp sponge to remove dust. Prime the repair area with drywall primer, which will seal any remaining compound and give you a true color baseline for paint.
7. Blend Into Invisibility. Once primer is dry, paint the repaired corner with the same finish as the surrounding wall. Apply two thin coats rather than one thick coat. The repair zone should disappear into the wall. If the existing paint is old, the repair may look fresher even after paint—that's normal and fades as the paint seasons.