Cavity wall ties are essential for structural stability. Over time, they can corrode or fail, leading to serious structural issues. Many Irish homeowners are unaware of the risks until visible cracks appear. A professional property survey can identify cavity wall tie failure before it causes costly damage. 

What are cavity wall ties? 

Cavity walls are common in Irish homes. They consist of two layers of brick or blockwork with a gap in between. Cavity wall ties hold these layers together, ensuring stability and preventing separation. 

If wall ties corrode or break, the outer wall may detach, leading to significant structural problems. Cavity wall tie failure is a major concern in older homes, particularly those built before the 1980s. 

Signs to look for

There are several warning signs of failure of cavity wall ties. If you notice any of the following, you should arrange a professional inspection: 

• Horizontal cracks: Cracks running along mortar joints, often at regular intervals. 

• Bulging walls: The external wall may bow outward, indicating detachment. 

• Lintel cracks: Cracks around windows and doors, suggesting movement. 

• Rust stains on brickwork: Corroded wall ties can leave rust marks on exterior walls. 

• Loose or hollow-sounding brickwork: Tapping on affected areas may reveal instability. 

Ignoring these issues can lead to severe structural instability. A professional surveyor can assess the extent of cavity wall tie failure and recommend repairs. 

What causes cavity wall tie failure? 

Several factors contribute to cavity wall tie failure in Irish homes: 

• Corrosion: Most older wall ties were made from mild steel, which rusts over time. 

• Poor installation: Incorrectly placed ties may fail prematurely. 

• Excessive moisture: Damp conditions accelerate corrosion. 

• Inadequate protection: Older ties often lack a protective coating. 

• Structural movement: Subsidence or heavy loads can put stress on wall ties. 

Regular property inspections can help detect these issues early. 

How surveyors identify the problem 

A professional cavity wall tie failure survey includes: 

• Visual inspection: Checking for cracks, bulging walls, and rust stains. 

• Endoscopic camera survey: Small cameras are inserted into the cavity to inspect wall ties. 

• Metal detector testing: Locating and assessing the condition of existing wall ties. 

• Structural report: A detailed analysis with repair recommendations. 

This type of survey is significant for anyone buying a home or renovating an older property. 

How to fix cavity wall tie failure 

If a survey confirms failure of cavity wall ties, repairs may include: 

• Installing new wall ties: Modern stainless-steel ties replace corroded ones. 

• Isolating old ties: Preventing further corrosion by removing or isolating defective ties. 

• Repointing brickwork: Addressing cracks and reinforcing stability. 

• Improving drainage: Reducing moisture levels to prevent future corrosion. 

A structural engineer or qualified surveyor will determine the best solution for your property. 

Book a property survey today 

Early detection of cavity wall tie failure can prevent costly repairs and structural damage. Book a professional property survey today if you’ve noticed cracks, bulging walls, or rust stains.

 

Contact us to schedule an inspection!