what is wall tie failure

Different Types of Cavity Wall Ties Cavity wall construction has become a popular choice in modern building design due to its excellent thermal and moisture performance. One crucial component of cavity wall systems is the cavity wall tie, which serves to connect the inner and outer leaves of the wall, providing structural integrity and stability. Various types of cavity wall ties are available, each designed to accommodate different building materials, environmental conditions, and load requirements. 1. Metal Ties Metal cavity wall ties are the most commonly used tie types. They are typically made from stainless steel or galvanized steel, offering durability and resistance to corrosion. Stainless steel ties are particularly advantageous in coastal regions or areas with high humidity, while galvanized ties are often used in less severe environments. Metal ties can be classified into several subcategories - Twisted wire ties These simple and effective ties are made of a single piece of wire twisted into a loop, providing sufficient tensile strength while being easy to install. - Flat ties These ties are flat, steel strips with holes at either end. They provide a larger surface area for bonding with mortar, making them suitable for heavier loads. 2. Plastic Ties different types of cavity wall ties Plastic cavity wall ties are a newer alternative that has gained popularity due to their resistance to moisture and corrosion. They are made from high-density polyethylene (HDPE) or polyvinyl chloride (PVC) and are lightweight, making them easy to handle and install. Plastic ties are often used in areas where metal ties may corrode, such as in highly alkaline environments. Furthermore, they provide excellent thermal insulation, which is beneficial for energy efficiency in buildings. 3. Composite Ties Composite wall ties combine the benefits of metal and plastic. They typically consist of a core made from strong plastic materials, reinforced with metal strands to enhance tensile strength. These ties are engineered to resist decay and corrosion while maintaining the structural integrity of the wall. Composite ties are ideal for environments where both strength and resistance to corrosion are necessary. 4. Adjustable Ties For buildings with varying wall widths or where adjustments may be needed during construction, adjustable cavity wall ties are very useful. These ties allow for flexibility in installation, making it easier to connect walls with different thicknesses. They are often adjustable in length and feature mechanisms that help maintain tension between the wall sections. Conclusion Choosing the right type of cavity wall tie is essential for ensuring the longevity and stability of a cavity wall system. Factors such as the building's location, the materials used, and environmental conditions will all influence the decision. By understanding the different types of cavity wall ties available, builders and architects can ensure that they select the most appropriate option for their specific construction projects, leading to safer and more efficient buildings.