How to Patch Small Holes and Cracks in Drywall

Nail holes, doorknob dings, and small cracks in drywall are some of the fastest wins in home repair — most can be patched, sanded, and painted in a single afternoon with under $15 in materials. This guide covers the two most common jobs: small holes (up to about 1/2 inch) and hairline cracks, using a basic drywall repair kit.

How to Patch Drywall: Quick Overview

Small nail holes and dings can be filled directly with spackle or lightweight joint compound and sanded smooth. Cracks and slightly larger holes need a self-adhesive mesh patch underneath the compound so the repair doesn’t just crack open again. If you’re seeing the same crack reappear again and again in the same spot, especially near a foundation wall or corner, that can point to structural settling rather than a cosmetic issue — our foundation repair cost guide covers what that looks like and what it costs to address. And if the drywall damage came from a leak rather than an impact, check our water damage and mold remediation guide before you patch over it, since trapped moisture needs to be resolved first.

What’s Actually Wrong

Drywall is a paper-faced gypsum panel, so any impact — a doorknob, a moved piece of furniture, a picture hook — either dents or punches through the paper and gypsum core. Hairline cracks usually show up at the seams between drywall sheets or in corners where the house has settled slightly, which is normal in almost every home and not usually a structural concern on its own. The key to a repair that lasts is bridging the damaged area with a patch material that can flex slightly with the wall rather than just filling the hole, which is why mesh-backed patches outperform plain spackle on anything bigger than a small nail hole.

Tools You’ll Need

• Drywall repair kit (self-adhesive mesh patches and lightweight joint compound)
• Putty knife (a 4-inch and a 6-inch are both useful)
• Fine-grit sanding sponge (150-220 grit)
• Damp cloth
• Primer and matching paint
• Drop cloth or old towel

Step-by-Step Fix

1. Clean the area. Knock away any loose paper or crumbling gypsum around the hole or crack, and wipe away dust with a damp cloth. Let it dry fully.
2. For small holes (under 1/2 inch): Apply spackle or joint compound directly with a putty knife, slightly overfilling the hole, and scrape it flush.
3. For larger holes or cracks: Cut a piece of self-adhesive mesh patch to cover the damage with about an inch of overlap on all sides, and press it firmly onto the wall.
4. Apply the first coat of compound. Spread a thin, even layer over the patch (or hole) with the putty knife, feathering the edges out beyond the patch so there’s no visible ridge. Let it dry per the product’s instructions, usually a few hours.
5. Sand lightly. Once fully dry, sand with a fine-grit sanding sponge until smooth, wiping away dust as you go.
6. Apply a second, thinner coat if needed. Larger patches usually need two coats to disappear completely. Feather each coat wider than the last, let dry, and sand again.
7. Prime and paint. Unprimed compound absorbs paint differently than the surrounding wall, so always prime the patch before painting over it with matching wall color.

Watch the Repair

Getting the patch flat is the part that trips people up. This clip from Ask This Old House shows the feathering and sanding described above, on a real wall.

When to Call a Pro

Holes larger than about 6 inches across usually need a cut-in drywall patch backed by furring strips or a scrap of drywall, which is still doable for an ambitious DIYer but is a bigger job than a basic kit covers. Cracks that keep coming back in the same spot, run diagonally from a window or door corner, or appear alongside doors that stick or gaps in flooring, are worth having a foundation specialist look at rather than repeatedly patching over.