How to patch drywall holes

What supplies do I need to patch drywall?

Most patches need only a putty knife, sandpaper or a sanding sponge, primer and paint. The filler and any patch material depend on the size of the hole.

• Nail holes and dents: lightweight spackle and a small putty knife.
• Medium holes: a self-adhesive mesh patch, joint compound and a wider taping knife.
• Larger holes: a scrap of drywall, a drywall saw or utility knife, screws, backing strips, joint tape and joint compound.
• For every repair: an N95 mask, a damp cloth to wipe away dust, primer and matching paint.

Cover the floor with a drop cloth before you sand. Drywall dust is fine and travels farther than you expect.

How do I fix nail holes and small dents in drywall?

Fill them with lightweight spackle, let it dry, sand it smooth, then prime and paint. This is the simplest wall repair and needs very few tools.

1. Wipe away dust and pull out any loose paper or crumbled edges.
2. Press a small amount of spackle into the hole with a putty knife, then scrape across the surface so it sits flush.
3. Let it dry fully. Spackle that shrinks as it dries may need a second thin coat.
4. Sand lightly until the patch feels level with the wall.
5. Wipe off the dust, prime the spot, then paint.

For a shallow dent, skip the pushing and simply skim a thin layer of spackle over it, feathering the edges outward so the repair blends in.

Why do I need to prime a patch before painting?

Primer seals the patch so it takes paint at the same rate as the wall around it. Without it, the repaired spot often shows through as a dull or blotchy patch, an effect painters call flashing.

Spackle and joint compound are more absorbent than painted drywall. Priming the patched area, and a little beyond its edges, evens that out before the final coats of paint go on.

How do I patch a medium-sized hole in drywall?

Use a self-adhesive mesh patch, then cover it with joint compound applied in thin coats. This works for holes too big for spackle alone, such as a doorknob dent or a removed wall anchor that tore out a chunk.

1. Trim away loose paper and crumbling edges, and wipe the area clean.
2. Press the mesh patch over the hole so it is fully stuck down with the hole centered.
3. Spread a thin coat of joint compound over the patch, pressing it through the mesh and extending it a little past the patch edges.
4. Let it dry completely, then add another thin coat, widening it slightly each time so the edges fade into the wall.
5. Sand smooth, wipe off the dust, prime, and paint.

Thin coats matter. A thick coat dries slowly, cracks, and leaves a lump that is hard to sand flat.

How do I repair a large hole in drywall?

Cut out the damaged section into a clean square or rectangle, fit a new piece of drywall, and tape and finish the seams with joint compound. A hole too big for a mesh patch needs real backing, not just filler.

1. Check first that nothing is hidden behind the wall, such as wiring or pipes. If you are unsure, stop and see the pro list below.
2. Trace and cut a clean square or rectangle around the damage with a drywall saw or utility knife.
3. Fasten backing strips or cleats inside the opening so the new piece has something to attach to.
4. Cut a new piece of drywall to fit snugly, and screw it to the backing.
5. Cover the seams with joint tape and spread joint compound over them in thin coats, letting each coat dry and sanding between coats.
6. Prime and paint once the surface is smooth.

Wear an N95 mask and eye protection when cutting and sanding drywall. If your home was built before 1978, the paint may contain lead: test it before you sand or scrape, and follow the EPA's lead-safe work guidance.

What is the best way to get a smooth, invisible patch?

Build the repair up gradually and feather each coat wider than the last. A patch that looks flat up close but shows in side light usually has edges that were not blended far enough.

• Apply thin coats and let each one dry fully before sanding.
• Use a light touch when sanding so you do not gouge the patch or tear the paper face of the drywall.
• Check your work by holding a light at a low angle across the wall. Shadows reveal ridges and dips.
• Prime the patch, then paint the whole wall section corner to corner if the color does not match, since new paint often looks different from old.

Time: A short job, plus drying time between coats..

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Frequently asked questions

More answers

For general homeowner reference only. When a repair involves gas, major electrical, or structural work, call a licensed professional.