When to Replace Wall Ties: Advice from Cavitech
Wall ties are small, hidden components in cavity walls, but their role in holding the inner and outer walls together is vital. If they fail, the consequences can range from unsightly cracks to serious structural problems. At Cavitech, we often see cases where timely replacement could have prevented costly repairs.
Why Wall Ties Matter
Since the 1920s, most UK houses have been built with cavity walls. Metal wall ties bridge the cavity, securing the two leaves of the wall so they act as one stable unit. Older wall ties, especially those made from mild steel, are prone to corrosion. Once ties start to rust and expand, they can crack brickwork and undermine the stability of the outer wall.
Modern stainless steel wall ties, by contrast, are designed to last the lifetime of the building.
Warning Signs of Wall Tie Failure
Common signs that wall ties may be failing include:
- Horizontal cracks along mortar joints
- Bulging or bowing brickwork
- Lintel failure above doors and windows
- Rust staining on brickwork
- Loose or unstable masonry
These symptoms suggest that the cavity wall is no longer being tied securely. If left untreated, the damage will worsen, increasing the risk of significant structural repairs.
Professional Wall Tie Surveys
Spotting the early signs yourself can be difficult. That is why Cavitech offers professional wall tie surveys. Using borescope, our qualified surveyors locate and assess existing ties without unnecessary disruption. Once the inspection is complete, we provide a clear report and practical recommendations.
The Replacement Process
If replacement is required, we install new stainless steel wall ties alongside the old ones and isolate the originals to prevent further damage. The process is carried out from the outside of the property, minimising inconvenience and leaving your walls neat and secure.
Why Timely Replacement is Worth It
Replacing wall ties promptly helps to:
- Maintain the structural integrity of your home
- Prevent water ingress and further cracking
- Protect property value
- Avoid expensive large-scale repairs
Protect Your Property
If you are concerned about the condition of your wall ties, or if you own a property built before the 1980s, now is the time to act. Contact Cavitech today to arrange a professional wall tie survey.