Corner bead is an essential component in drywall installations as it provides strength, protection, and aesthetic value to the corners. It is a metal or plastic strip that is used to protect the edges of drywall corners from cracking or getting damaged. However, during the installation process, it is common for small gaps to appear between the corner bead and the drywall, leaving homeowners wondering whether they can apply compound over corner bead to seal these gaps. In this article, we will explore whether this practice is feasible and the proper techniques for accomplishing it successfully.
Understanding the Purpose of Corner Bead
Before delving into the question at hand, let’s first understand the purpose of corner bead in a drywall installation. As mentioned earlier, corner bead serves a variety of purposes. Firstly, it adds strength to the corners, preventing them from getting dented or chipped easily. Corner bead also acts as a guide, providing a straight edge for a smooth and even taping and mudding process. Lastly, it creates neat, crisp corners that give a professional finish to the walls.
Examining Feasibility and Techniques
Upon examining the question of whether compound can be applied over corner bead, the answer is both yes and no. It ultimately depends on the type of corner bead being used. Let’s explore the two most common types and their compatibility with applying compound.
1. Metal Corner Bead:
Metal corner bead is the traditional and most widely used option. It is made of a thin, l-shaped metal strip that is attached to the corners of the drywall. When it comes to applying compound over metal corner bead, it is generally not recommended. Compound does not adhere well to the metal surface, and over time, it may crack or peel. Moreover, if the compound is applied unevenly, it can result in an unsightly finish.
2. Vinyl Corner Bead:
Vinyl corner bead is a newer alternative to metal and offers several advantages. It is made of flexible vinyl, making it easier to install and less prone to denting. In the case of vinyl corner bead, applying compound over it is indeed feasible and a common practice. The flexibility of vinyl allows the compound to adhere and bond well, offering a smooth, crack-free finish. Additionally, vinyl corner bead can be easily sanded if needed, adding to its convenience.
Considerations and Best Practices
Before proceeding with applying compound over vinyl corner bead, it is essential to consider a few factors and follow specific best practices. Here are some key points to keep in mind:
1. Clean and Prep:
Before applying compound, ensure that the corner bead is clean, free from dust, and firmly attached to the drywall. Sand down any rough edges or imperfections on the vinyl corner bead to create a smooth surface for the compound to adhere to.
2. Apply Joint Compound:
Using a drywall knife or trowel, apply a thin layer of joint compound over the corner bead. Start from the center and work your way outwards, ensuring even coverage. Be careful not to apply too much compound, as it may result in cracking during the drying process.
3. Embed Drywall Tape:
To further reinforce the corner, embed a strip of drywall tape into the compound. This will provide additional strength and prevent future cracking. Gently press the tape into the compound, making sure it lays flat and adheres well.
4. Feather and Sand:
Once the compound has dried, you will likely need to apply additional layers to achieve a smooth finish. Feather the compound by gradually spreading it outwards to blend it seamlessly with the surrounding wall. Sand the dried compound lightly to remove any imperfections and create a flush, even surface.
While it is generally not advisable to apply compound over metal corner bead, it is indeed feasible and practical to do so with vinyl corner bead. However, it is crucial to ensure a proper cleaning and preparation process, follow the recommended techniques, and practice good finishing practices. By doing so, you can achieve a professional-looking, crack-free finish for your drywall corners.