Cavity Wall Tie

Cavity Wall Tie

Cavity walls have been constructed since the beginning of the 20th century and were implemented to offer better protection from the elements as well as reduce the amount of unnecessary heat lost from the property. The system comprises of two separate walls ‘tied’ at strategic intervals using a form of wall tie commonly made of metal coated in bitumen or zinc, known as cavity wall ties. If your property is suffering from wall tie failure then this can mean that both skins become independent of each other. This means that the property can become structurally unsafe and a danger to those that may be in it or around it.

Timberwise surveyor: Sarah Haslam

Accredited to

Sarah Haslam

Remedial Surveyor and Waterproofing Design Specialist CSRT CSSW
North West

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Need reinforced walls? Call 0800 288 8660 or

Why we are trusted to do the job

Timberwise have fully trained and experienced surveyors who have a range of solutions at their disposal to solve your cavity wall tie problem. Our surveyor will recommend the most suitable structural repairs for your property as well as providing a written report for the work to be carried out.

Identifying Cavity Wall Tie Failure

There are a number of signs to look out for to see if your property is affected:

  • Horizontal Cracks – in mortar, often a high level, caused by expansion of corroded wall ties.
  • Bulging brickwork – caused by snapped wall ties, which have corroded. This can make your property unstable.
  • Lintels sagging
  • Cracks or separation of window reveals
Cavity Wall Tie

What is a Cavity Wall Tie?

Cavity wall ties are metal strips or bars built into the cavity walls with the sole purpose to hold the masonry together. Wall ties are key to the safety and stability of all cavity walls. They are used to stabilise the wall construction and to stop the separate skins of the wall from moving away from each other. The ends of the ties are designed to lock into the cement bed of the mortar joints in each skin. There is also a design element in the tie (usually a twist or dip) that stops the transfer of moisture from the outer leaf to the inner leaf of the wall construction.

Cavity walls usually now have insulation within the cavity that has been incorporated into the design of the wall construction or retrofitted with blown or foam insulation. They usually take the form of galvanised fishtail types in the earlier years and later they then were constructed from galvanised twist wire and more recently stainless steel.

Walls that are solid construction ( don't use have a cavity ) will not have cavity walls ties within their construction as a general rule although there are some exceptions where flat steel plates have been used in solid construction walls.

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Cavity Wall Tie Installation

How we install wall ties

In order to assess existing cavity wall ties Timberwise use various types of specialist equipment. High quality metal detectors are used to locate the wall ties within the construction. New stainless steel wall ties are installed by usually drilling from the external leaf and fitting replacement wall ties

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Request a survey online

Need reinforced walls? Call 0800 288 8660 or

Need a Cavity Wall Tie Replacement in your property

If a problem with cavity wall tie corrosion has been identified, our specialist technicians who will provide the right treatment to your corroded wall ties. Contact Timberwise via our let’s chat button by calling on 0800 288 8660 or you can request a survey online.