The hole in my hallway wall was the size of a doorknob. My son had been practicing his “karate moves” and caught the wall instead of the pillow he was aiming for. I stared at it for about three months, telling myself I would fix it when I had time. When I finally tackled it, I failed. Twice. The third attempt finally worked, and the process I landed on has since fixed every hole, crack, and dent in my house.

My first failed attempt was the classic newbie mistake: I just smeared spackle into the hole and smoothed it over. The next morning, the spackle had shrunk as it dried, leaving a visible concave depression. I sanded it and added more spackle, which also shrank. After three rounds of this, I had a lumpy patch that looked worse than the original hole.

For my second attempt, I tried a mesh patch kit from the hardware store. The mesh is supposed to provide structure, but I did not feather the edges properly, and the patch was visibly raised from the wall. When the hallway light hit it at the right angle, it looked like I had taped a piece of cardboard to the wall and painted over it.

The third attempt — the one that actually worked — involved a method I learned from a drywall contractor I met at a neighbor’s renovation. Here is exactly what I did.

First, I cut the hole into a clean square shape. Using a utility knife, I cut about an inch beyond the damaged area in each direction to reach solid drywall. A ragged hole is much harder to patch than a clean square. For a doorknob-sized hole, I cut a square about four inches on each side.

Next, I cut a piece of drywall slightly smaller than the hole. Home Depot sells small squares of drywall for patch work — I got a two-foot by two-foot piece for a few dollars. The patch piece should fit into the hole with a small gap of about an eighth of an inch on all sides.

The trick that made the difference was the backing support. I cut two thin strips of wood — paint stir sticks work perfectly for this — about two inches longer than the hole on each side. I inserted the stir stick into the hole, centered it so it spanned behind the existing drywall on both sides, and screwed through the existing drywall into the stir stick on each side using drywall screws. I did this with two stir sticks, one near the top and one near the bottom of the hole. This created a solid backing that my patch piece could attach to.

I placed the drywall patch into the hole and screwed it into the stir sticks. Now the patch was flush with the surrounding wall and solidly supported.

Then came the joint compound — what I used to call spackle. The key difference is that joint compound can be applied in thin layers and feathered out to blend with the existing wall. I spread a thin layer over the patch and the seams, embedding drywall tape into the wet compound over each seam. This prevents cracking along the patch edges. I feathered the compound out about six inches beyond the seams on all sides, using a wide drywall knife held at a shallow angle.

After the first coat dried overnight, I sanded lightly and applied a second, wider coat, extending the feathered edge even further. A third coat and final sanding made the patch completely invisible. I then applied primer — this step is essential because bare joint compound absorbs paint differently and will show through if you skip it — and two coats of wall paint. You would never know there was ever a hole there.

Since mastering this method, I have fixed a cracked ceiling seam, a dented corner from moving furniture, and several other holes of varying sizes. The investment in materials — a drywall knife, joint compound, drywall tape, and a sanding block — was under $40, and I have used them for at least a dozen repairs.