Installing corner bead is an essential step in finishing drywall corners, as it not only reinforces and protects the vulnerable edges, but also provides a clean, professional-looking finish. However, when it comes to installing corner bead over old wallpaper, there are some factors to consider. In this article, we will explore the feasibility and challenges of installing corner bead over old wallpaper and provide some tips for successful installation.
The Challenges of Installing Corner Bead Over Old Wallpaper
1. Uneven Surface
One of the primary challenges of installing corner bead over old wallpaper is the uneven surface it creates. Old wallpaper can become brittle, lose adhesion, or have bumps and imperfections, all of which can prevent the corner bead from adhering properly. Additionally, the thickness of the wallpaper can cause an uneven transition, making it difficult to achieve a smooth finish.
2. Adhesive Issues
Another challenge is the adhesive used for corner bead installation. Traditional drywall adhesives may have difficulty bonding with the old wallpaper, resulting in poor adhesion or even failure. This lack of proper adhesion can compromise the integrity of the corner bead and lead to cracks or detachment over time.
Tips for Successful Installation
1. Removing the Wallpaper
The best practice for installing corner bead is to remove the old wallpaper before beginning the process. This ensures a clean and even surface to work with. Use a wallpaper scraper or steamer to remove the wallpaper, being careful not to damage the underlying drywall. Once the wallpaper is removed, thoroughly clean the surface to remove any adhesive residue or loose debris.
2. Patching and Repairing
After removing the wallpaper, evaluate the condition of the drywall. If any areas are damaged or uneven, it is essential to patch and repair them before installing corner bead. Use joint compound to fill in any cracks, holes, or imperfections, and sand the repaired areas to create a smooth surface.
3. Applying a Primer
Before installing the corner bead, apply a primer to the repaired areas and the rest of the wall. The primer ensures proper adhesion between the drywall, joint compound, and the corner bead. It also helps create a uniform surface and prevents the underlying drywall from absorbing moisture from the joint compound, which could potentially cause issues in the future.
4. Choosing the Right Adhesive
To ensure a successful installation, it is crucial to choose the right adhesive specifically designed for installing corner bead. Look for an adhesive that is suitable for difficult surfaces or wallpaper. These adhesives usually have strong bonding capabilities and can adhere well even to challenging surfaces.
5. Proper Installation Technique
When installing corner bead, follow the manufacturer’s instructions carefully. Apply the adhesive evenly on the backside of the corner bead and press it firmly against the corner of the wall. Use a level to ensure it is straight. Once the bead is in place, secure it with drywall screws or nails, following the recommended spacing provided by the manufacturer. Finally, apply joint compound over the corner bead, feathering it out to create a smooth transition with the surrounding wall.
While it is technically possible to install corner bead over old wallpaper, it is not the ideal approach due to the challenges it presents. Removing the wallpaper, patching and repairing the drywall, applying a primer, choosing the right adhesive, and following proper installation techniques are crucial for ensuring success. If you are uncertain about your ability to handle this task, it may be best to consult a professional to achieve a proper and long-lasting finish.