How to Repair a Large Drywall Hole

Dents are easily filled, but a hole large enough to see through requires structural support before it can be patched. When you have a gap exceeding four inches, simple mesh tape and spackle will fail; you need a proper 'back-up' method to create a rigid surface for your patch. Done well, the repair becomes completely invisible under a layer of paint. The secret lies in creating a frame behind the wall that pulls the new patch perfectly flush with the existing surface. Take your time with the mudding stages, as thin, gradual layers always outperform one thick application.

1. Square the hole first. Use a drywall saw to cut the jagged hole into a clean rectangle. This makes it significantly easier to cut a matching piece of drywall later.
2. Build the backing frame. Cut two pieces of scrap 1x2 or 2x4 lumber slightly longer than your opening. Slide them into the hole and screw them into the existing drywall edges so they bridge the gap, creating a frame for your patch.
3. Fit the new patch piece. Measure the hole and cut a matching piece of drywall to fit snugly inside the frame. Screw this patch directly into the wood backing you installed.
4. Tape and mud the seams. Apply paper or fiberglass mesh tape over the seams where the patch meets the wall. Use a 6-inch taping knife to spread a thin layer of joint compound over the tape and screw holes.
5. Feather edges perfectly smooth. Once dry, lightly sand the area with 120-grit sandpaper to remove high spots. Apply a second, wider coat of mud to blend the edges into the surrounding wall.
6. Prime and paint to blend. Wipe away all dust with a damp cloth, then apply a coat of drywall primer. Once dry, finish with two coats of wall paint to match the existing finish.