What are the types of metal corner beads?

There are several types of metal corner beads, each designed for protecting and finishing drywall corners, particularly external (outside) corners. Here’s a breakdown of the main types:

1. Standard Metal Corner Bead

• Material: Typically galvanized steel or aluminum.

• Shape: "L" shaped with a sharp nose for crisp corners.

• Application: Nailed, screwed, stapled, or crimped into place, then mudded over with joint compound.

• Common Use: Most basic drywall installations.

2. Paper-Faced Metal Corner Bead

• Material: Metal core with a paper overlay.

• Shape: Similar to standard but with paper to help it bond better with drywall mud.

• Application: Installed using joint compound (not nailed or screwed).

• Advantages: Reduces cracking and peeling at corners, better adhesion, and hides fasteners.

3. Vinyl-Coated Metal Corner Bead

• Material: Metal core with a vinyl or PVC coating.

• Advantages: Corrosion-resistant, good for high-humidity areas (like bathrooms).

• Application: Attached similar to standard beads; the coating makes it easier to achieve a smooth finish.

4. Arch or Flexible Metal Corner Bead

• Material: Thin metal designed to flex.

• Shape: Pre-slotted or flexible design for curves and arches.

• Application: Used for non-standard, curved wall shapes or arches.

5. Bullnose Metal Corner Bead

• Material: Usually galvanized steel.

• Shape: Rounded (instead of sharp 90°).

• Application: Installed similarly to standard beads.

• Common Use: For softer, rounded drywall corners, which are popular in modern or Southwestern-style architecture.

6. Expanded Metal Corner Bead

• Material: Expanded (mesh-like) galvanized metal.

• Features: More surface area for mud to grip.

• Application: Nailed, stapled, or crimped in place; excellent for high-durability needs like commercial projects.

7. Double or Wide-Flange Metal Corner Bead

• Material: Heavier galvanized steel with wider wings.

• Application: Provides more strength for heavy-duty protection, often used in high-traffic areas like schools and hospitals.