Cavity wall ties are small but vital components in the structure of many properties across the UK. They hold together the two layers (or ‘skins’) of a cavity wall, ensuring stability and strength. When these wall ties fail, the structural integrity of your home or building can be compromised, leading to cracks, instability, and in severe cases, unsafe conditions.
At Surveying Cymru, we offer a comprehensive cavity wall tie replacement service carried out by experienced Surveyors. Based in Monmouth and serving South Wales, Gloucestershire, and Herefordshire, our team combines professional expertise with modern techniques to keep your property safe, secure, and structurally sound.
Call: 01600 715350 to enquire about a survey
What Are Cavity Wall Ties and Why Do They Need Replacing?
The Purpose of Cavity Wall Ties in Construction
Cavity walls are built with two layers of masonry separated by an air gap. The wall ties act as connectors between the two layers, ensuring they work together to bear the load of the building. They also help prevent moisture from crossing the cavity.
If these ties fail due to age, corrosion, or poor installation, the walls can begin to move independently, causing visible damage and increasing the risk of collapse.
Common Signs of Wall Tie Failure
- Horizontal cracks along the mortar joints (often in a stepped pattern)
- Bulging or bowing brickwork
- Loose or unstable masonry
- Rust staining on external walls
- Visible movement in the wall when pressure is applied
If you notice any of these signs, it’s important to arrange a professional inspection as soon as possible.

WHAT OUR CLIENTS SAY
Causes of Cavity Wall Tie Failure
Corrosion and Rust
Over time, steel wall ties can corrode, especially if the galvanised coating has deteriorated. Rust causes the ties to expand, creating cracks in the surrounding brickwork.
Poor Installation Practices
Incorrect spacing, unsuitable materials, or improper alignment during construction can reduce the lifespan and performance of wall ties.
Natural Wear Over Time
Like all building materials, wall ties degrade with age. Many older homes still have their original ties, which may now be past their expected lifespan.
Our Process for Replacing Cavity Wall Ties
Inspection by a Chartered Surveyor
Our process starts with a detailed survey by a qualified Surveyor. We use specialist equipment to locate and assess the condition of existing wall ties without unnecessary damage to your property.
Wall Tie Extraction and Clearance
Once defective ties are identified, we carefully extract them, ensuring the surrounding masonry is not damaged. In some cases, we leave the old ties in place but isolate them to prevent further damage.
Installation of New, Long-Lasting Wall Ties
We use stainless steel wall ties for durability and corrosion resistance. These are installed at the correct spacing and alignment to meet current building standards.
Quality Checks and Final Report
After installation, we carry out a full quality check to ensure every tie is secure and positioned correctly. You will receive a written report confirming the work carried out, along with photographs for your records.

Benefits of Replacing Cavity Wall Ties Promptly
Maintaining Structural Integrity
Replacing damaged wall ties prevents the walls from moving apart, ensuring the property remains stable and safe.
Preventing Cracks and Structural Movement
Timely replacement helps avoid further damage to brickwork, which can be expensive to repair if left unchecked.
Protecting Property Value
A structurally sound property is more appealing to buyers and can help maintain or even increase a property’s value.
Frequently Asked Questions
Look for horizontal cracks, bulging brickwork, or rust stains on exterior walls. A survey from a Surveyor will confirm whether replacement is needed.
In most cases, replacement is the safest and most effective solution. Repairing corroded ties usually only offers a temporary fix.
Yes. Our reports include detailed readings, photographs, and recommendations, suitable for use in insurance claims or disputes.
For most residential properties, the work can be completed in a few days, depending on the size and complexity of the building.
We work carefully to minimise disruption. Most work is carried out from the outside of the property, meaning you can remain in your home during the process.
Book Your Cavity Wall Tie Replacement Service Today
If you suspect your cavity wall ties are failing, or you’ve already noticed signs of movement or cracking – don’t wait for the damage to get worse. At Surveying Cymru, we provide fast, reliable, and professional wall tie replacement services to restore your property’s safety and strength.
Call: 01600 715350 Email: nick@surveyingcymru.co.uk
Surveying Cymru – Trusted surveyors delivering expert solutions for homes across South Wales, Gloucestershire and Herefordshire.