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How To Repair a Metal Wall Corner Bead

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Metal Corner Bead

Metal Corner Bead

Courtesy U.S. Gypsum - Copyright U.S. Gypsum
You won’t know whether your walls have metal corner beads until there is a problem. Underneath is an ugly piece of L-shaped metal called a metal corner bead. It’s used to finish off drywall corners and make them stronger than the other method, which involves wrapping paper tape around the corner. Metal or paper…metal or paper… Hmm, which would you rather have? Actually there is as third option—paper tape reinforced with metal. But what we’re dealing with here is honest-to-goodness metal bead, of the type that professionals install. Even it is cannot withstand the rigors of everyday life.
Difficulty: Average
Time Required: 30 Minutes

Here's How:

  1. Use your hacksaw to cut out the section of damaged metal corner bead. You will be doing a little damage to paint and undamaged drywall, but you will later fix this.
  2. Cut section of new corner bead to exactly fit damaged area. It’s hard to cut little pieces of metal beading, but try to hold it steady (you can even use a vise) because you don’t want to cause undue stress which will bend the edges of the beading.
  3. Place the new corner bead in the area. Secure with four drywall screws: two at the bottom, two at the top of both sides of the corner. File away any burrs in the new metal beading.
  4. Now the artistic part. Trowel on 2 to 3 coats of “mud” (drywall compound) on your new corner. Don’t be overly concerned about making a perfect 90 degree angle at this point.
  5. After the compound has dried, make it a nice, smooth surface--and perfectly angled--with your sander.

What You Need

  • Hacksaw
  • New length of corner bead
  • Cordless drill
  • Metal file, or even coarse-grain sandpaper
  • Drywall compound
  • Drywall trowel
  • Drywall sander
  • 4 drywall screws

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