How to Repair a Large Hole in Drywall

Large drywall holes require a patch piece and compound application in multiple coats, taking 2-3 days due to drying time between coats.

  1. Create Clean Edges First. Use a drywall saw to cut a clean square or rectangle around the damaged area. Make straight cuts that extend past the hole by about an inch on all sides. This creates clean edges that will hold the patch securely.
  2. Install Structural Support. Cut a piece of scrap wood or mesh patch slightly larger than your hole. For wood backing, cut it about 2 inches longer and wider than the hole. Slide it behind the opening and secure it with drywall screws driven through the existing wall into the backing piece.
  3. Fit Your Patch Piece. Cut a new piece of drywall to exactly match your square opening. Test fit it first - it should sit flush with the surrounding wall surface. If it's too tight, sand or trim the edges slightly until it fits perfectly.
  4. Lock It Down Solid. Apply construction adhesive to the backing piece, then press the patch into place. Drive drywall screws through the patch into the backing, placing screws about every 6 inches around the perimeter. Sink the screw heads slightly below the surface.
  5. Begin Blending the Seams. Using a 6-inch putty knife, apply joint compound over the seams and screw heads. Spread it about 6 inches beyond the patch edges, feathering the edges thin. Don't worry about perfection on this coat - focus on filling gaps and covering screws.
  6. Build Smoothness Gradually. After 24 hours, lightly sand the dried compound with 120-grit sandpaper. Apply a second coat with an 8-inch knife, extending the compound wider than the first coat. This coat should be smoother and blend better with the surrounding wall.
  7. Feather to Invisibility. Sand lightly again after the second coat dries. Apply a final thin coat with a 10-12 inch knife, feathering the edges out even further. Once dry, sand with 150-grit paper until the repair area feels smooth and matches the surrounding wall texture.
  8. Seal and Match the Wall. Apply primer to the repaired area before painting. The compound will absorb paint differently than the existing wall, so priming ensures an even finish. Once the primer dries, paint to match the existing wall color.