A three-corner bead is installed to cover the exposed part of the corner of a wall. These beads protect the corners and save the areas from wearing off, rendering a smooth, neat look to your walls. Follow the simple steps below to effectively install a corner bead at any three-way corner.
To begin, carefully note the measurements of the corners of your wall to get an idea of the dimensions of the corner beads that would fit onto them. Make sure that the beads you buy are large and long enough that the corner can be completely covered by them. Never buy beads of a smaller dimension than the corner measurements, as joining of several beads to cover the three-way corner looks clumsy and looks untidy, which mars the neat effect a bead is supposed to provide.
After buying the corner beads, cut them up to the exact size you need. Place the beads on a flat surface like the floor and mark out the dimensions of the wall corner onto the bead surface. Now use tin snips or a circular saw to carefully cut through the beads along the line marked. Do not apply too much force to the beads. As you cut, take care not to bend or dent the beads.
Installing the Beads
Once you finish cutting the corner beads to size, place them one by one on the outside corners of the wall. See that the beads are fitting perfectly over the corners, and ensure that they are not placed crookedly. Ask a friend to hold the bead over the corner while you countersink the drywall screws into the bead edges. The beads already have spaces for the screws to go in. Make sure that the sides are alternated.
Use 1-inch screws first and then ½-inch screws, and screw them up every 10 inches. You need to countersink the screws to form the dimple that is to be covered with drywall mud. For this, simply apply the ready drywall mud available at a home improvement shop, over the dimple after the screws are sunk in.
Finally, insert a mud knife at the place of the screws to see if you hear any clicking noise. If so, you have to fasten the drywall screws a bit more. If not, the screws are perfectly countersunk into the corner of the wall. It is recommended that you install the beads using screws instead of nails as they are easier to handle.