plasterboard external corner bead

The Essential Guide to Plasterboard External Corner Beads

Plasterboard, or gypsum board, is widely used in construction and interior design for its versatility, ease of installation, and cost-effectiveness. When it comes to finishing external corners, plasterboard corner beads play a crucial role in achieving smooth, well-defined edges that enhance both aesthetics and durability. In this article, we will explore the importance of external corner beads, the different types available, and best practices for installation.

What Are Plasterboard External Corner Beads?

Plasterboard external corner beads are protective strips used to reinforce and protect the corners of plasterboard installations. They are designed to create sharp, clean edges at right angles, preventing damage to the corners from everyday wear and tear. This is particularly important in high-traffic areas, where the edges are more likely to be bumped or scraped.

Typically made from materials like metal, plastic, or paper-faced steel, corner beads help ensure that the angles remain intact and visually appealing throughout the lifetime of the wall. They serve both functional and decorative purposes, making them a staple in residential and commercial constructions.

Types of Corner Beads

1. Metal Corner Beads These are the most common type of corner beads and provide excellent durability and strength. Typically constructed from galvanized steel, metal corner beads are resistant to impact and can withstand the rigors of high-traffic areas. They are often coated with a rust-resistant finish, enhancing their longevity.

2. Plastic Corner Beads Lightweight and easy to work with, plastic corner beads are another popular option. They are immune to rust and corrosion, making them suitable for moist environments like bathrooms or kitchens. However, they may not be as durable as metal options, making them better suited for less stressful applications.

3. Paper-Faced Corner Beads These are made of a cardboard-like material on the face and a metal or plastic core. They combine the best of both worlds—strength from the core and easy application thanks to the paper face, which allows for seamless taping and finishing.

Installing plasterboard external corner beads requires careful attention to detail to ensure a professional finish. Here are some best practices

1. Preparation Before installation, ensure that the plasterboard edges are cut straight and clean. Any irregularities may affect the alignment of the corner bead.

2. Fastening Apply the corner bead to the corner using screws or nails, depending on the material. It is vital to secure it firmly without overdriving the nails or screws, which could deform the bead.

3. Taping and Finishing Once the corner bead is secured, apply joint compound over the bead using a drywall knife. Feather the edges to create a smooth transition between the bead and the wall. Allow the compound to dry thoroughly before sanding it smooth.

4. Final Touches After sanding, apply a second coat of joint compound if necessary. Once dried, sand it again for a perfect finish. Finally, prime and paint the corner to match the wall.

Conclusion

Plasterboard external corner beads are an essential component in creating durable, aesthetically pleasing internal finishes. By choosing the right type of corner bead and following proper installation techniques, one can ensure that corners remain intact and visually appealing over the years. Whether you are a seasoned contractor or a DIY homeowner, understanding the importance and application of corner beads can significantly elevate the quality of your plasterboard projects. With the right tools and techniques, achieving a flawless finish is within reach.