DIY Network

How to Replace Rusted Corner Beads

The original corner beads and deck of this home have started to rust. Learn how to replace rusted corner beads with vinyl, reapply the stucco and replace rusty nails.

More in Remodeling

replace rusted corner beads with vinyl
  • Time

    Several Weekends

  • Price Range

    $250 - $500

  • Difficulty

    Moderate to Hard


Step 1: Remove the Old Stucco

Determine how wide the band around the corner needs to be. Measure, level and mark the band width on each side of the corners (Image 1).

Chipping off stucco is a messy job, so lay down a tarp before beginning.

Chip away the stucco in the designated area using a hammer and chisel. Once the area is clear of the unwanted stucco, remove the old corner bead (Image 2).

Step 2: Apply the Corners and Stucco Stop

Measure out the new plastic corner bead and cut to size; install using noncorrosive nails (Image 1).

Measure out stucco stop and cut to size; use an adhesive to hold in place, making sure the stucco is even with the lines drawn earlier. Use a carpenter’s square to check your work; when it's even, nail into place (Image 2).

Step 3: Apply the Stucco Mud

Apply the stucco mud. Before applying, make sure the surface is free of any paint: rough and porous paint won't allow the base or scratch coat to adhere properly. Load the trowel with mud and press it in place, making sure to fill all the voids (Image 1).

Allow the first coat to dry for several hours before applying the second finish coat. The finish coat is applied from the top down on top of the scratch coat to smooth out the stucco surface.

A damp float, worked lightly in a circular motion, will further smooth out the surface. Follow the same procedure with a dry float (Image 2).

Use a damp sponge to wipe off the new plastic corner bead. When dry, the stucco can be painted.

Step 4: Check for Rusted Nails

If rust is in the wood, any new screw (regardless of the metal composition) in an old hole will rust.

Other than replacing all the decking and hardware, the fix here is to drill new holes and use noncorrosive stainless-steel fasteners.

use noncorrosive stainless steel fasteners