Why is corner bead used in drywall finishing?

Corner bead is primarily used in drywall finishing to provide a stronger corner edge. When drywall is installed, the edges of the boards can be fragile and susceptible to damage from everyday wear and tear, such as bumps and impacts. By applying corner bead, which is typically made of metal or plastic, the corners receive added protection, making them more durable and resistant to chipping or cracking.

This strengthening of the corner edge is essential as it helps maintain the overall integrity and aesthetic of drywall installations. A well-finished corner not only looks better but also enhances the longevity of the drywall structure, minimizing the need for repairs over time. The use of corner bead ensures that the corners remain sharp and defined, contributing to a professional appearance in completed interiors.