How to Patch a Large Hole in Drywall
What to Do With Drywall Holes Larger Than 6 Inches
Sudden impact or force from an object or person can accidentally cause a large hole in your drywall. Repairing large holes in drywall—anything over 6 inches—is different from fixing a small hole in drywall. Small holes can be patched over with drywall tape or a self-adhesive drywall patch, but large holes need a more rigid material to span over the larger opening. Learn how to patch a large hole in drywall like a pro with the proper drywall materials and these easy steps.
The simplest solution is also the best: cutting a patch from another piece of drywall and securing it with wood backing strips and drywall screws. Once the patch is in place, tape and "mud" (apply joint compound) over the seams, just like when installing new drywall. If you finish the patch carefully, it will not be visible.
Need more help? Talk to a drywall repair expert
What You'll Need
Equipment / Tools
- Framing square
- Pencil
- Drywall saw
- Tape measure
- Wood saw
- Drill with screwdriver bit
- Utility knife
- 6 inch drywall knife
- 150-grit sanding sponge
- Rag
- Paintbrush
Materials
- Scrap lumber or plywood strips, at least 3 inches wide
- Piece of drywall (thickness must match drywall in repair area)
- 1 1/4 inch coarse-thread drywall screws
- Self-adhesive mesh drywall joint tape
- Drywall joint compound
- Primer
- Paint
Instructions
How to Patch Large Holes in Drywall
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Measure and Cut the Opening
- Trim the edges of the hole to create straight sides and a square or rectangular overall shape.
- Use a framing square and a pencil to mark cutting lines on the drywall.
- Cut along the lines with a drywall saw.
- Measure the size of the opening after you have cut it.
Warning
Make sure there is no wiring or plumbing behind the drywall surface before cutting by looking through the hole with a flashlight.
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Install the Backing Strips
- Cut two pieces of lumber or plywood a few inches longer than the long sides of the hole (if it's a rectangle).
- Place one piece into the hole, parallel to one of the long sides, so the strip is centered over the drywall edge (half is behind the drywall and half is exposed).
- Secure the strip with drywall screws driven through the drywall and into the strip.
- Keep the screws about 1 inch from the drywall edge, and space them about 6 inches apart.
- Repeat the same process to install the other backing strip along the opposite edge of the hole.
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Install the Drywall Patch
- Cut a piece of drywall to fit the hole. It doesn't have to be a snug fit, but the seams should be not more than about 1/8 inch wide.
- Position the patch over the hole and secure it to the backing strips with screws.
- Keep the screws about 1 inch from the edges of the patch and space them 6 inches apart.
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Tape the Seams
- Cut strips to the length of drywall joint tape using a utility knife.
- Cover each seam with a strip of joint tape.
- Overlap the tape strips at the corners. Make sure the tape lies flat, with no wrinkles or bulges.
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Apply Drywall Joint Compound
- Cover the drywall tape with a thin layer of drywall compound, using a 6-inch drywall knife. You should be able to see the mesh through the compound.
- Let the compound dry and then scrape the surface with the knife to remove any burrs or clumps.
- Apply another thin layer of compound, extending it beyond the edges of the first layer. Use the knife to feather the edges of the wet compound over the surrounding drywall so it gradually tapers to nothing.
- Let the second layer dry and then scrape again.
- Add a third layer. Let the third layer dry.
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Sand the Mud
Sand the dried compound with a sanding sponge to smooth the surface. Be careful not to oversand, which would cause the mesh tape to show through.
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Prime and Paint the Patch
- Cover the entire patch area with a coat of primer, using a paintbrush.
- Let the primer dry.
- Apply two or more coats of paint to match the surrounding area, as needed.
- Alternatively, if the wall or ceiling could use a new paint job, this is a great time to paint the whole thing, which will further help hide the patch. Sometimes new paint, even if it is the same color, will appear more vibrant than the existing paint, which may have faded over time.
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How big of a hole in drywall is too big to patch?
A hole over 8 or 10 inches in diameter could be considered too large to patch. However, it's not necessarily the size of the hole but rather how the hole is affecting the structural integrity of the drywall panel. The hole may be smaller but there may be additional cracks, which can mean replacement of the drywall panel is necessary.
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Can I use spackle instead of drywall mud?
Do not use spackle to replace drywall mud when fixing a large hole. Drywall mud is the same thing as drywall joint compound, which is what should be used fixing a large hole in your drywall.
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Which is stronger, spackle or joint compound?
It's easy to confuse spackle and joint compound (also called drywall mud). Spackle may be weaker than joint compound but it is best for filling in holes. Spackle is more elastic than joint compound, dries faster, and does not shrink that much. Joint compound is best for taping and finishing large holes in drywall.
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How big of a gap can spackle fill?
Spackle can fill a gap that's about 1/2-inch wide, or less. If the gap is larger than this but still small, you will want to patch it with another piece of drywall.