Cracks in brickwork can be unsettling, not just for how they look, but for what they might be hiding beneath the surface. One of the most common causes of stepped or diagonal cracks in cavity walls is the failure of wall ties. Left untreated, this kind of structural movement can compromise the safety and stability of a building.
At CavClear, we specialise in a proven method of repair called brickwork stitching. It’s a discreet, effective, and long-term solution that restores the strength of cracked masonry without the need for major rebuilding.
What Causes Step Cracking?
Step cracking typically follows the mortar lines in a zig-zag pattern and is often seen near windows, doors, or corners of buildings. This kind of cracking is frequently caused by the failure of cavity wall ties, metal components that connect the outer and inner layers (or ‘leaves’) of a cavity wall. You can read more about this here.
Over time, especially in older properties, these ties can corrode or break down. When they fail, the outer leaf of brickwork can begin to move independently, resulting in cracks that gradually worsen. In more severe cases, the wall may bulge or even become unstable.
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The Role of Brickwork Stitching
Brickwork stitching is a highly effective way to stabilise cracked masonry and restore the structural integrity of the wall. Instead of removing and rebuilding sections of brickwork, we ‘stitch’ the cracked areas together using stainless steel bars embedded in the mortar joints.
The process involves carefully cutting into the mortar above and below the crack, installing helical bars, and bonding them in place with a strong grout. This ties the masonry back together and spreads the load evenly across the wall, preventing further movement.
Once complete, the wall looks unchanged from the outside, but internally, it’s been reinforced for long-term strength.
Why Stitching Matters in Wall Tie Repairs
In many cases, brickwork stitching goes hand in hand with wall tie replacement. While replacing the failed ties addresses the underlying cause, stitching deals with the visible symptoms, the cracking and weakening of the wall structure. Together, they offer a repair solution that restores both form and function. Unlike some short-term patching methods, stitching is a permanent fix. It doesn’t just hide the problem, it solves it.
When Should You Be Concerned?
If you’ve noticed step cracks forming in your walls, particularly around openings or at the edges of your property, it may be time to act. Cracks wider than a few millimetres, or any sign of bulging brickwork, should be assessed by a professional. Rust stains on the surface of brickwork can also indicate wall tie corrosion. Early intervention can save you from more extensive repairs down the line!
At Cavclear, we combine deep expertise in building preservation with practical, efficient repair techniques. Our team uses the highest quality materials, including stainless steel reinforcement bars and non-shrink grouts, to ensure a long-lasting result with minimal disruption to your property.
Whether you’re dealing with cracking from wall tie failure, settlement, or general structural movement, our brickwork stitching service offers a robust and cost-effective solution.
Get in touch today to book a site visit or find out more about how brickwork stitching could restore strength to your home or property.
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