The corners of drywall require a metal bead.
Drywall installed in a home requires joint compound, or "mud," to cover the screws and seams before the wall can be plastered or painted. However, drywall that comes together in a corner can have a metal corner piece attached. This metal corner will need to be finished to blend in with the existing drywall. You can finish drywall with metal corners by applying drywall mud and then sanding.
Instructions
1. Measure the height of the wall with the tape measure. Transfer the measurement to the metal bead and cut it to the required length with the tin snips.
2. Place the metal bead over an outside corner where two pieces of drywall meet. Secure the metal bead to the drywall with drywall screws using the screwdriver. Drive a drywall screw every 5 inches on both sides of the metal bead.
3. Mix the drywall mud in a small container and then apply it over the metal bead with the finish knife. Start at the top and scrape down to feather out the drywall mud. The drywall mud should extend out from the corner at least 4 inches on both sides of the metal bead.
4. Sand the first layer of drywall mud with 120-grit sandpaper once the drywall mud has dried. Use a cloth or rag to wipe away the dust from the wall.
5. Mix another batch of drywall mud and apply another coat to both sides of the metal bead using the 8-inch finish knife. The drywall mud should extend 3 to 4 inches beyond the first coat.
6. Sand the second layer once it has dried and then wipe away any dust.
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