How to Install Metal Corner Beads – Step by Step
Metal corner beads are widely used to reinforce wall edges, protect corners from impact, and achieve clean, straight finishes in drywall, gypsum board, and plaster systems. Correct installation is essential to ensure durability, crack resistance, and a professional final appearance. This step-by-step guide explains how to install metal corner beads properly for long-lasting results.
Tools and Materials Required
- Metal corner beads (cut to required length)
- Tin snips or metal cutting tool
- Spirit level or straight edge
- Hammer and drywall nails or screws
- Joint compound or plaster
- Putty knife or trowel
- Measuring tape and pencil
Step-by-Step Installation Guide
Step 1: Prepare the Wall Corner
Ensure the wall corner is clean, dry, and free from loose debris. Check that the corner is reasonably straight. Any major uneven areas should be corrected before installing the corner bead.
Step 2: Measure and Cut the Corner Bead
Measure the height of the wall corner accurately. Using tin snips, cut the metal corner bead to the required length. Make sure the cut edges are clean and not sharp.
Step 3: Position the Corner Bead
Place the metal corner bead over the corner, ensuring both flanges sit evenly on each side of the wall. Use a spirit level to confirm that the bead is perfectly vertical and aligned.
Step 4: Fix the Corner Bead in Place
Secure the corner bead using drywall nails or screws. Start from the top and work downward, fixing at regular intervals (typically every 200–300 mm). Ensure the bead remains straight while fixing.
Step 5: Check Alignment
Once fixed, recheck the alignment with a spirit level or straight edge. Adjust immediately if needed before applying any finishing material.
Step 6: Apply the First Coat of Joint Compound or Plaster
Using a putty knife or trowel, apply the first coat of joint compound or plaster over the corner bead. Cover the metal flanges evenly and feather the edges outward onto the wall surface.
Step 7: Allow to Dry and Apply Additional Coats
Allow the first coat to dry completely. Apply a second and, if necessary, a third coat to fully conceal the corner bead and achieve a smooth, seamless finish. Feather each coat wider than the previous one.
Step 8: Sand and Finish
Once fully dry, lightly sand the surface to remove any imperfections. The corner should appear straight, smooth, and ready for painting or final finishing.
Common Installation Mistakes to Avoid
- Fixing the bead without checking alignment
- Using too few fasteners
- Applying thick plaster coats without drying time
- Not feathering the joint compound properly
Tips for Best Results
- Always use corrosion-resistant metal beads in humid areas
- Maintain consistent spacing between fixings
- Use compatible joint compounds or plaster
- Allow adequate drying time between coats
Frequently Asked Questions (FAQ)
1. Can metal corner beads be used with plaster?
Yes, metal corner beads are suitable for plaster walls and provide excellent edge reinforcement when installed correctly.
2. Should I nail or screw metal corner beads?
Both methods work well. Screws provide stronger hold, while nails are faster for drywall applications.
3. How many coats of joint compound are required?
Usually two to three coats are sufficient for a smooth and professional finish.
4. Can metal corner beads rust?
Standard metal beads may rust in humid conditions. Use galvanized or treated metal beads for moisture-prone areas.
5. Is sanding necessary?
Yes, light sanding ensures a smooth surface before painting or finishing.
Raltro
Raltro Trades provides high-quality metal corner beads and complete wall finishing solutions for drywall, gypsum board, and plaster systems. Along with corner beads, Raltro offers joint compounds, plastering materials, tools, and accessories sourced from trusted brands. With reliable products and professional solutions, Raltro supports builders and contractors in achieving strong, straight, and long-lasting wall corners.