Corner Bead

Definition

A corner bead is a metal or plastic strip used to form a neat, durable edge at the outside corner of two walls of plaster or gypsum board.

Purpose

The purpose of a corner bead is to protect the edges of walls from damage and to provide a clean, straight edge for a professional finish on plaster or drywall corners.

Examples of Use

• In drywall installation, corner beads are used on external corners to protect the edges from impacts and to ensure a smooth, finished look.
• Plaster walls use corner beads to form sharp, durable corners that resist chipping and wear.
• Remodeling projects often involve installing new corner beads to repair or upgrade damaged corners.

Related Terms

• Drywall Tape: A paper or mesh tape used to cover joints between drywall panels.
• Joint Compound: A plaster-like substance used to finish drywall seams and cover corner beads.
• Bullnose Corner Bead: A type of corner bead with a rounded edge for a softer, more modern look.

Notes

Corner beads must be properly installed and secured to provide effective protection and a clean finish. They are typically embedded in joint compound and sanded smooth during the finishing process.