Cavity wall tie repair and replacement specialists
Looking for help? Get in touch with us
Cavity wall tie repair and replacement specialists
Looking for help? Get in touch with us
Get in touch
If you have any questions or would like to book a survey, complete the form below and a member of our team will call you back.
What causes cavity wall ties to corrode?
Originally, cavity wall ties were crafted from iron or steel, but these metals corrode under damp conditions. To counteract this, wall ties were coated with zinc. However, this protective layer can deteriorate over time, leading to tie failure. The first British standard wall tie with a defined zinc coating was introduced in 1945 and further refined in 1981.
Pre-1981 wall ties are prone to premature failure due to various factors like corrosive mortars, exposure to rain, and substandard galvanizing. Corroded fishtail ties can cause cracking in the outer leaf, while wire Butterfly ties may snap without warning, leading to bulging in the wall. Though Butterfly ties typically last around 35 years, conditions can shorten their lifespan significantly.
To mitigate future tie failures, modern wall ties are made from stainless steel, eliminating corrosion concerns. Replacement of wall ties requires specialised expertise and is recommended to be done by professionals to ensure structural integrity.
Signs of cavity wall tie failure
Horizontal Cracks
Found in the mortar, often at a high level. This is caused by the expansion of corroded wall ties on the external leaf.
Bulging Brickword
A sign of snapped wall ties, which can make your property unstable.
Internal Cracking
Internal cracking is caused by the expansion of corroded wall ties.
Cracks in the render
Vertical cracks in the render
Roof edges lifting
The inner leaf carries the roof load, but as corroded wall ties expand and crack the mortar, the outer leaf takes the load resulting in forcing the roof upwards or the gable ridge to rise
Signs of cavity wall tie failure
Horizontal Cracks
Found in the mortar, often at a high level. This is caused by the expansion of corroded wall ties on the external leaf.
Bulging Brickword
A sign of snapped wall ties, which can make your property unstable.
Internal Cracking
Internal cracking is caused by the expansion of corroded wall ties.
Cracks in the render
Vertical cracks in the render
Roof edges lifting
The inner leaf carries the roof load, but as corroded wall ties expand and crack the mortar, the outer leaf takes the load resulting in forcing the roof upwards or the gable ridge to rise
Book a survey
Whether you want to book a survey, or get a quote, simply complete the form below and a member of our team will be in touch.
Testimonials
After wall tie failure was highlighted on our building survey, North West Wall Ties produced a professional pre-purchase report for us in really good time, and gave us what seems a perfectly reasonable quote for the work. Hopefully our purchase goes through and then we’ll be able to get the required work done with this company.
Warren was fantastic. From the first point of contact to the job was complete he was contactable, reliable, extremely fair in price and more than punctual.
Very professional manner and very thorough in his work. Extremely approachable, happy and pleasant. Very highly recommended.
Warren and his team were friendly and efficient, working well together to get the job done properly and quickly. He quoted for the work back in September, and the price stayed the same despite us not confirming the go-ahead until December. All in all professional and I would recommend them to anyone needing wall ties in future.