EIFS (Exterior Insulation and Finish System) is a popular choice for homeowners looking to enhance the aesthetics and energy efficiency of their homes. One essential component of EIFS installation is the corner bead, which provides structure and protection to the system’s corners. However, many homeowners wonder if they can install EIFS corner bead over old plaster. In this article, we will discuss this topic in detail, exploring the compatibility of these two materials and the considerations that need to be taken into account.
Understanding EIFS Corner Bead:
Before delving into the compatibility aspect, it’s crucial to have a clear understanding of what EIFS corner bead actually is. Corner bead is a metallic or PVC strip specifically designed for EIFS systems, which are used to protect and reinforce the sharp corners of a building’s exterior. The bead acts as a rigid support structure, preventing damage and cracking at these vulnerable spots. It also helps to ensure a smooth and straight finish, enhancing the visual appeal.
Compatibility of EIFS Corner Bead and Old Plaster:
When considering installing EIFS corner bead over old plaster, it is important to evaluate the compatibility of these two materials. In general, EIFS corner bead is designed to be installed over a stable and sound substrate, which typically includes concrete, cement board, and certain types of sheathing. Old plaster, on the other hand, may not always offer the required stability and strength.
Factors to Consider:
- Condition of the Old Plaster: The condition of the old plaster plays a crucial role in determining its compatibility with EIFS corner bead. If the plaster is deteriorated, cracked, or in poor condition, it may not provide a stable substrate for the corner bead. In such cases, it is advisable to address the issues with the plaster before proceeding with the installation of the bead.
- Adhesion: Another important consideration is the ability of the corner bead to adhere to the old plaster. EIFS corner bead requires appropriate bonding and adhesion to ensure a secure and long-lasting installation. If the old plaster is too smooth or has a high level of paint or other coatings, it may not allow for proper adhesion of the corner bead. In such cases, surface preparation, such as roughening or cleansing the old plaster, may be necessary to facilitate the adhesion.
- Compatibility of Materials: It is important to ensure that the materials used for the corner bead and the old plaster are compatible. For example, if the corner bead is made of metal and the old plaster contains moisture or salts, it may result in corrosion over time. To avoid such compatibility issues, it is recommended to consult with a professional who can provide guidance on the suitable materials for your specific situation.
Professional Assessment:
In any case, when considering installing EIFS corner bead over old plaster, it is always advisable to seek the opinion of a professional contractor or EIFS system specialist. They can assess the condition of the existing plaster, identify any potential issues, and provide expert advice on the compatibility, preparation, and installation process. Their experience and expertise can help ensure a successful and durable installation of the EIFS corner bead.
While it may be possible to install EIFS corner bead over old plaster, several factors need to be considered to ensure a proper and long-lasting installation. Assessing the condition of the old plaster, evaluating the adhesion and compatibility, and seeking professional advice are crucial steps in determining the feasibility of this approach. By taking the necessary precautions and consulting with experts, you can achieve a sturdy and visually appealing EIFS corner bead installation while maintaining the integrity and stability of your existing plaster.