Drywall installation uses specialized tools.
Bullnose corners on drywall are popular in the home building and home design business. During construction, there are three options for bullnose styles: bullnose, baby bullnose and chamfer. Bullnose provides a rounded corner with a 3/4-inch radius. Baby bullnose creates a 1/2-inch radius rounded corner, and chamfer creates an angular bullnose corner. The angular bullnose varies, with the flat corner surface ranging from 1/2-inch to 1 1/4-inches across.
Instructions
Prepare Drywall Corners
1. Hang drywall so that two sheets of drywall coming together at an outside corner do not meet, but instead create a right or 90-degree angle, like a notch open to the outside.
2. Dry fit a short piece of corner bead against the drywalled corner. If the corner bead rocks, one or both pieces of drywall comes too near the outside edge of the corner. Cut the drywall back until the applied corner bead does not rock.
3. Install transition pieces if applicable. Transition pieces may be used at the floor to facilitate the installation of bullnose baseboard corner moldings or flat baseboard moldings.
4. Measure the length of corner bead needed to fit between the ceiling and the floor or the transition piece at the floor. Cut with tin snips. Apply the bullnose corner bead to the drywall corner according to the type of corner bead used. See instructions that follow.
Apply Plastic Bullnose Corner Bead
5. Apply spray adhesive to plastic corner bead and to drywall where corner is to be applied.
6. Press the corner bead into place. Hold in place for 15 seconds. Pull the corner bead off and reapply. Hold until bonded to the drywall.
7. Mix joint compound according to instructions.
8. Apply joint compound to complete the drywall bullnose corner according to standard drywall practice. Using a 6-inch drywall taping knife apply joint compound to either side of the bullnose bead.
9. Sand lightly. Apply a second coat of joint compound. Use a 12-inch drywall taping knife and apply another coat of joint compound to feather edges. When dry, sand as needed for a smooth finish.
Apply Metal Bullnose Corner Bead
10. Mix joint compound according to instructions.
11. Apply joint compound to each side of the drywall corner using a 6-inch drywall taping knife.
12. Press the metal bullnose corner bead into the joint compound to stick. Ensure a tight seal by running your taping knife down either side of the bead, holding the knife at a 45-degree angle.
13. Skim joint compound over the bullnose corner bead, using the 6-inch drywall taping knife. Allow to dry.
14. Sand lightly and apply a second coat of joint compound. Allow to dry. Sand to smooth.
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