How to Corner Bead Corners on a Tray Ceiling

Spray drywall spray adhesive at the intersecting corner. Position the bull-nose connector to the intersecting corners and secure it with drywall screws using an Phillips adapter bit on a drill. Countersink the screw heads slightly below the drywall.

Measure each outside corner with a tape measure. Transfer the measurement to the bull-nose bead strips. Cut the strips to size with a pair of tin snips.

Apply spray adhesive to both sides of the outside corner. Press the end of the bull-nose bead under the groove of the connector and firmly press the length of the corner bead against the outside corner.

Install drywall screws every 8 inches down the length of the bull-nose corner bead on both sides. Countersink each of the screw heads below the surface of the drywall.

Place drywall mud in a paint tray and add ¼ cup of water. Mix the water and drywall mud well with a paint stick. This thins out the mud so that it infiltrates inside the vanes of the bull-nose corner bead.

Apply the thinned drywall mud to the corners with a wide blade mud knife, just as you would with a regular corner bead. Flatten the surface with the mud knife and allow the mud to dry.

Apply a second coat of unthinned drywall mud to the corners. Allow the mud to dry completely and sand with a fine-grit sandpaper and sanding block until smooth.