How to Repair Drywall Yourself: Holes, Cracks, and Texture

Most drywall repair needs less than twenty dollars of materials, and buying the right ones matters more than buying a lot. Here is what is on our truck for patch work, and what you actually need for each size of job.

• Lightweight spackle for nail holes and dents under a quarter inch, and all-purpose joint compound (drywall mud) for everything bigger. Spackle shrinks less and dries fast; joint compound sands smoother and feathers wider.
• A 2-inch putty knife for small fills and a 6-inch flexible joint knife for feathering coats. A 10-inch knife if you are taping a large patch.
• A self-adhesive mesh patch (or a drywall patch kit) for holes up to about three inches. Paper joint tape or mesh drywall tape for seams on bigger repairs.
• A utility knife with fresh blades, a drywall saw for cutting openings, and a tape measure.
• A sanding sponge or fine grit sandpaper (150 to 220 grit), a dust mask, and a drop cloth. Sanding dust travels.
• Primer. Joint compound soaks up paint differently than the painted wall around it, and a patch that skips primer flashes through the finish coat as a dull spot. This is the step most first-timers skip and then regret.
• For large holes: a scrap piece of drywall the same thickness as the wall (half inch in most rooms), a few drywall screws, and a strip of wood for backing.

Small nail holes, screw holes, anchor holes, and dents under half an inch are a five-minute fix. Scrape any raised paper or lip flat with the putty knife so the surface is flush. Press lightweight spackle into the hole with the knife, then drag the blade across at a low angle to leave the fill just proud of the wall. Let it dry completely (an hour for spackle, longer in Florida humidity), sand it flush with the sanding sponge, wipe the dust off with a damp rag, and prime the spot before paint.

One coat is usually enough for a nail hole. If the fill shrinks back into the hole as it dries, which happens with deeper holes, add a second thin coat rather than one thick one. Thick coats crack.

A doorknob strike, a hole from a removed towel bar, or anything from half an inch to about three inches across needs something for the compound to sit on. That is the job of a self-adhesive mesh patch, which is a square of fiberglass mesh with a thin metal backing that spans the hole.

1. 1

   Prep the damaged area

   Trim loose paper and rough edges back with the utility knife so nothing sticks up past the wall. Frayed edges telegraph through every coat you put over them. Wipe the area so the patch adheres.

2. 2

   Set the patch

   Peel the backing and press the mesh patch centered over the hole, sticky side to the wall, and rub it down firmly. The patch should overlap sound drywall by at least an inch on every side.

3. 3

   Apply joint compound in thin coats

   Spread joint compound over the patch with the 6-inch knife, pressing it through the mesh, then feather the edges out two or three inches past the patch. Keep it thin. Let it dry, then add a second coat feathered wider than the first, and often a third. Each coat gets thirty to sixty minutes of drying at least; on a humid Florida afternoon give it more.

4. 4

   Sand, prime, paint

   Once completely dry, sand the repaired area smooth with fine grit in a light crisscross pattern, working from the center out, until you cannot feel the edge with your fingertips. Wipe the dust, prime the whole patch, and paint. If the wall has texture, see the texture section before you paint.

Past about three inches, a mesh patch will sag and crack. Large holes need a new piece of drywall set into a clean opening and screwed to something solid. It sounds harder than it is, and it is the repair that separates a patch you can find from one you cannot.

1. 1

   Square up the hole

   Use a stud finder, a magnet, or the knock test to check whether a stud runs behind the damage; a screw or a wire could too, so look into the hole with a flashlight before cutting. Draw a clean square or rectangle around the damaged section, then cut it out with the drywall saw. A square opening is far easier to patch than a ragged one.

2. 2

   Add backing

   Cut a strip of wood (a piece of 1x3 or a furring strip) a few inches longer than the opening is tall. Slip it into the cavity behind the drywall, hold it against the back of the wall, and drive drywall screws through the existing drywall into each end of the strip so it is fixed in place. Now there is something solid behind the middle of the hole. If a stud runs along one side of the opening, you can screw the patch to it directly on that side and back the other.

3. 3

   Cut and fit the patch

   Cut a piece of new drywall the same size as the opening (measure twice; a snug fit with no more than an eighth of an inch gap). Set it in and fasten it to the backing with drywall screws, sinking each screw head just below the paper without tearing it.

4. 4

   Tape and mud the seams

   Cover every seam with paper tape or mesh drywall tape, then coat with joint compound. The first coat fills the seams and covers the tape; the second and third feather the edges out several inches so the patch blends into the surrounding wall. Thin coats, full drying between them, and a light sand after each.

5. 5

   Finish

   Final sand with fine grit, wipe, prime the whole repair, match the texture if the wall has one, and paint. A large patch finished this way disappears; the same patch done with one thick coat of mud shows a rectangle in raking light for the life of the house.

Cracks come in two kinds, and treating the wrong kind is why they come back. A hairline crack where the wall meets the ceiling, or in a corner, is usually the joint tape letting go or the house moving a little with the seasons. Fill that one with flexible paintable caulk, not mud, because rigid compound cracks again the next time the framing shifts. Smooth the bead with a damp finger and paint it when it cures.

A crack that runs across the middle of a wall or a ceiling, especially one you can feel a ridge on, is a seam crack: the joint tape under the surface has failed. Scrape the loose compound out, cut away any lifted tape, then embed fresh paper tape in a thin bed of joint compound, coat it, and feather it out. A drywall repair on a ceiling crack is the same process done overhead, which is slower and messier, so protect the floor and expect to wear the dust.

A crack that is wider than an eighth of an inch, keeps growing, or runs diagonally from the corner of a door or window can be a sign of settling or a moisture problem and deserves a look from a licensed contractor before anyone fills it.

Almost every Florida home has textured walls, and texture is where do-it-yourself patches get caught. A perfectly smooth patch on an orange peel wall shows up like a bald spot. The fix is a can of spray texture from the hardware store, sold in orange peel and knockdown patterns with an adjustable nozzle.

Practice on a piece of cardboard first, because the spray pattern is everything. Hold the can 18 to 24 inches from the wall and spray lightly past the edges of the repair so the new texture fades into the old. For orange peel, let it dry and paint. For knockdown, wait about ten to fifteen minutes for the splatter to set up, then drag a wide knife across it with almost no pressure to flatten the peaks. Prime over the dried texture, then paint.

If the texture is peeling off the drywall in sheets, that is water getting behind it, and spraying new texture over the problem just hides it for a season. Find the leak first.

• One thick coat instead of three thin ones. Thick mud shrinks, cracks, and takes days to dry in humidity.
• Skipping primer. Every patch that flashes through the paint skipped this step.
• Sanding too hard. Fine grit and a light touch; aggressive sanding scuffs the paper around the patch and makes a bigger repair.
• Cutting without looking. Wires and pipes live behind drywall, especially near outlets, switches, and bathrooms. Look in the hole before you cut it bigger.
• Patching over water damage. Soft, stained, or bubbled drywall means moisture. Fix the leak and replace the wet board; mud over it and the stain comes back through the paint.
• Using a mesh patch on a hole bigger than your fist. It will crack. Cut in a new piece of drywall.
• Forgetting popped nails. A popped nail head is a bump that shows through paint; drive it back or replace it with a screw an inch away, then fill both.

Repairing drywall is a real Saturday skill, and a nail hole or a doorknob strike is a fair fight. Some jobs are not, and knowing the line is worth more than any tutorial. A hole bigger than a dinner plate, anything on a ceiling, any repair where the board is soft or stained from water, a smooth-finish wall where every flaw shows, or a whole house of dings before a sale are the jobs that end up with our crews, usually after a first attempt.

Our craftsmen cut out the damage, set a proper patch, apply joint compound in thin coats, and blend the texture into the surrounding wall so the surface reads as one again, primed and paint-ready or painted to match. One price in writing for the whole list, and a one year warranty. If your first try still shows, we can cut it out and do it right, and nobody on the crew will say a word about the first try.