Goodbye Ugly Holes, Hello Smooth Walls
Whether it's a doorknob dent, a picture hook gone wrong, or a chunk ripped out during a move, holes in walls are one of the most common household problems — and one of the easiest to fix yourself. With the right filler and technique, you can make a hole completely invisible, even under paint.
What You'll Need
- Ready-mixed filler or two-part filler (for larger holes)
- Flexible filling knife (putty knife)
- Sandpaper (medium-grit 80–120, then fine 180–220)
- Primer and paint to match your wall
- Damp cloth
- For larger holes: mesh patch kit
Diagnosing Your Hole
- Nail holes and small dents (under 1cm): ready-mixed filler applied with a finger or knife
- Medium holes (1–5cm): mesh patch + filler
- Large holes (over 5cm): plasterboard patch + jointing compound
Fixing Small Holes
Clean the hole — remove any loose plaster or crumbling edges. Dampen the area slightly (this helps filler bond). Press ready-mixed filler firmly into the hole with your filling knife, dragging it flat across the surface. Slightly overfill — filler shrinks as it dries. Leave for 2–4 hours.
Once dry, sand smooth with medium then fine sandpaper. Dust off, apply a thin coat of primer over the repair, let dry, then paint to match. Feather the paint slightly beyond the repair area for a seamless result.
Fixing Medium Holes with a Mesh Patch
Self-adhesive mesh patches are available at any DIY shop for under £5. Peel and stick the mesh over the hole. Apply filler over the mesh in thin layers, letting each coat dry and sanding between coats (2–3 coats is typical). Prime and paint as above.
Fixing Large Holes
For holes bigger than your fist, you'll need a piece of plasterboard cut to size. Cut the damaged area into a clean rectangle. Cut a patch slightly larger than the hole. Secure wooden battens inside the wall cavity as backing boards. Screw the patch to the battens. Apply jointing tape over the edges, then build up with jointing compound in thin coats, feathering the edges out wide. Sand smooth, prime, paint.
Pro Tips for a Seamless Finish
The secret to invisible repairs isn't the filler — it's the finish. Always prime before painting, always sand between coats, and always feather your paint beyond the repair zone. If your walls have a textured finish, recreate the texture while the final coat is still wet by dabbing gently with a sponge.