How to repair a large hole in drywall

damaged drywall
SJ Duran/Shutterstock

Repairing drywall is a skill that every thrifty homeowner should have on their resume. It’s not complicated, doesn’t require specialty tools, and takes just a little time. For a small hole, it’s a simple matter of plugging it with lightweight spackle, smoothing it out after it dries, and then touching up the paint. Larger holes, however, are a bit more challenging.

After the initial shock of breaking a 6-inch or larger hole in a wall, you may at first think it’s a job for a professional. That might not actually be the case. If you’re a DIYer with a few basic hand tools, there’s no need to hire out this project. You can tackle the job in just a day or two (including drying time), and you’ll spend less than $100 on materials to do it. 

Tools and equipment

  • Tape measure
  • Pencil
  • Builder’s square
  • Drywall saw
  • Wood saw
  • Utility knife
  • Cordless drill/driver with #2 Phillips-head screwdriver bit
  • Drywall taping knife
  • Sanding sponge, 150-grit
  • Dust mask
  • Vacuum cleaner
  • Tack cloth
  • Rag
  • Paintbrush
  • Paint roller, roller cover, and pan

Project materials

  • 1 x 4 common board (length varies based on the size of the hole)
  • 1 ¼ inch coarse threaded drywall screws
  • Drywall, the same thickness as that to be repaired
  • Self-adhesive mesh drywall tape
  • Drywall joint compound
  • Primer
  • Paint 
installing a drywall patch
Charles Lewis/Shutterstock

How to patch drywall

Prepare the wall

Gently remove any loose, broken pieces of drywall. Look for wiring, pipes, or ductwork in the wall space behind the area that needs to be patched. If any of these are present, be careful not to damage them during the repair. Next, use the builder’s square and a pencil to mark straight lines just beyond the edges of the broken hole to square it up. Use the drywall saw to carefully cut out the excess pieces. 

Install backer boards

Cut two backer boards out of a 1 x 4 board, about 4 inches longer than the long sides of the opening. Install the first backer board inside the wall so that the face of the board is centered on the edge of the opening, half behind the drywall and half exposed. Each end should extend about 2 inches past the opening. Hold the backer board in place and secure it with drywall screws through the drywall and into the board. Space the screws 1-inch from the edge of the drywall and 6-inches apart. Sink the screw heads slightly below the surface of the drywall. Repeat the installation process with the second backer board along the opposite long edge of the opening.

Cut and install the drywall patch

Measure, mark, and cut the drywall patch to the same dimensions as the opening. A little wiggle room is fine, but the gap between the patch and the existing drywall should be ⅛-inch or less. Place the patch in position and fasten it with more drywall screws. Space the screws 1 inch from the edge of the patch, and 6-inches apart.

sanding a patched wall
Sergiy1975/Shutterstock

Tape the joints

Measure the lengths of the seams between the patch and the existing drywall, and use the utility knife cut strips of mesh drywall tape. Tape over the lengths of all the seams, overlapping the tape at the corners. Be careful to avoid creating wrinkles and bubbles in the tape. 

Mud the joints

Use the drywall knife to work a thin layer of joint compound into the mesh tape. The texture of the mesh should still be visible. Allow the mud to dry, then scrape it with the knife to smooth it out. 

Apply a second thin layer of joint compound to further smooth the texture of the tape. Use the drywall knife to feather out the wet compound beyond the edges of the tape. Let it dry, and scrape to smooth again.

Apply a third and final layer of compound. Feather it out to blend with the surface of the wall beyond the patch, then let it dry.

Sand

Put on the dust mask and use the sanding sponge to smooth out the surface of the drywall compound, being thorough but not aggressive. Over-sanding will cause the mesh tape to show through, which would then require you to re-mud, dry, and sand all over again. After sanding, clean up the dust with a vacuum cleaner and wipe down the patch with the tack cloth.

Paint

Use the paintbrush to apply a coat of primer over the patched area. Let it dry thoroughly, then use the roller to apply two or three coats of paint to match the rest of the wall. For the best color match, paint the entire wall instead of just the repaired area.

To save big money on home repairs, learn to do the basics yourself. Repairing drywall is neither difficult, time-consuming, nor expensive, so it’s a perfect do-it-yourself project for thrifty homeowners.

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