Drywall Installation Inside a Corner Bead | eHow

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Most drywall installations occur over bare wood frames. The advantage of this approach is that you only have to cut the board to size and use screws to attach it. However, some projects call for installing a new piece of drywall next to an existing installation. If the transition is an outside corner that is wrapped in corner bead, you might want to slip the new drywall in place without removing the existing corner bead.

Corner bead is metal sheathing used to guard the fragile edges where two boards of drywall meet. Common locations of corner bead include vertical outside corners and around entryways and windows.

The first step is to remove the old drywall. Use a hammer to break it apart and pull it off. Remove any remaining screws or nails projecting from the underlying frame. Leave the site as clean as possible. Chances are, the corner bead will bend as you pull the drywall from underneath it. Slight bending won't do much harm, but extreme bending might warp the corner bead and make it difficult to reattach later.

Drywall installers typically mount corner bead with screws or nails. If the installers used nails, it might be best to remove the old piece of corner bead and replace it with a new one. Prying the nails away likely will bend the corner bead too much, leaving it warped and uneven. If the installers mounted the corner bead with screws, use a screw gun to back the screws out. When you finish, the area under the corner bead should be bare and ready to receive the new piece of drywall.

Cut the new section of drywall to size and slip it underneath the corner bead. Use screws first to attach the drywall to the wood frame and then to hold down the edges of the corner bead. Corner bead has holes along its edges into which you can install the screws to make the edges flush with the wall. If you didn't bend the corner bead too much, it should be easy to hold the edges down with screws. However, if the corner bead is warped, you might have to install many screws to tamp the edges down. Once the installation is complete, you can finish the drywall installation as you normally would, using joint compound.

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Drywall Installation Inside a Corner Bead | eHow