Cavity Wall Ties: Types, Requirements, and Modern Solutions

In this post, we’ll explore the types, Requirements, and Modern Solutions of wall ties. Wall ties are a crucial component in cavity wall construction, providing essential stability and support by connecting the inner and outer walls. However, over time, older cavity ties, often made of mild steel, can deteriorate, leading to structural issues. We will cover the benefits of modern alternatives like resin and neoprene wall ties, and why replacing outdated mild steel ties is vital for your property’s longevity.

The Role and Importance of Wall Ties

Wall ties are embedded within the cavity wall and are responsible for:

1. Maintaining Structural Integrity: They hold together the two leaves of a cavity wall, preventing them from bowing or separating.
2. Distributing Load: Wall ties help distribute the weight of the building evenly, ensuring stability.
3. Preventing Moisture Transfer: Properly installed ties prevent moisture from crossing the cavity, protecting the interior from dampness.

Types of Wall Ties

1. Resin These types of ties are a modern solution designed to provide superior strength and longevity. These ties are often used in replacement projects where older, corroded ties have failed. The benefits of resin wall ties include:

• Corrosion Resistance: Resin is highly resistant to corrosion, making these ties durable even in harsh weather conditions.
• High Bond Strength: The resin material ensures a strong bond with both masonry leaves, enhancing the stability of the structure.
• Versatility: They can be used in a variety of building materials and conditions, making them a versatile choice for many projects.

2. Neoprene Neoprene ties are another innovative solution, known for their flexibility and durability. Key features include:

• Elasticity: The neoprene material allows for slight movements within the wall structure without compromising the bond, making them ideal for areas prone to thermal expansion or contraction.
• Vibration Damping: Neoprene ties can absorb vibrations and shocks, protecting the masonry from stress fractures.
• Weather Resistance: They are resistant to a wide range of environmental conditions, including extreme temperatures and moisture.

The Problem with Older Mild Steel Ties

Older mild steel ties, were once the standard in construction. However, the problems that come with this type of wall tie is typically 

• Corrosion: Over time, mild steel can corrode, especially if they are exposed to moisture for extended periods. This corrosion can weaken the ties, leading to structural instability.
• Structural Damage: Corroded ties can cause cracks and separation in the masonry, leading to significant structural damage.
• Moisture Penetration: If corroded ties deteriorate enough, they can allow moisture to penetrate the inner walls, causing dampness and mould.

Why Replacement is Essential

Regular inspections of wall ties are crucial, especially in older buildings. Replacing outdated and ineffective cavity ties with modern alternatives like resin or neoprene can prevent potential structural failures and maintain the safety and integrity of the property.

If you’ve noticed the signs of failing cavity ties, which you can read about here, you can book a CavClear wall tie survey today. Our expert surveys come with a full report and recommendations for remedial works, which may include wall tie replacement if necessary. 

Wall ties are a vital part of any cavity wall construction, and keeping them in good condition is essential for the overall stability of your building. For professional inspections, replacements, and advice, contact CavClear today, here.