How to Replace a Door Knob Hole in Drywall

Measure out a 3-by-3-inch square on the replacement drywall and cut it using the drywall saw.

Place the square of drywall over the door knob hole and trace along the outside of it.

Use the drywall saw to cut along the traced lines on the wall to make a squared-off hole in the wall, then use the utility knife to trim off any uneven edges left by the drywall saw.

Cut two 5-inch pieces of the furring strip with the hand saw.

Place the first furring strip inside the wall along the top of the cut out square. At least half of the furring strip should be visible in the hole. Secure the furring strip by driving a 2-inch drywall screw through the wall and into the wood strip. You should have one screw on each end of the furring strip. Install the bottom furring strip in the same manner.

Insert the replacement square of drywall into the hole so it is firmly up against the furring strips. Drive one screw through each corner of the square of drywall so it is firmly attached to the furring strips.

Apply mesh joint tape on top of the seams of the replacement piece of drywall.

Fill the mud pan with the premixed joint compound.

Load the 10-inch drywall taping knife with joint compound and apply a thin, even layer over the repaired area. Do your best to taper the edges of the compound, which helps you get a seamless finish. Allow the joint compound to dry.

Apply a second coat of joint compound over the repaired area and allow it to dry.

Sand the dried joint compound with a fine-grit sanding sponge. Apply very little pressure when sanding to prevent grooves from forming on the surface. If any high or low spots are present when you run your hand over the area, apply another thin layer of joint compound to smooth it out, then sand it again when dry.