Brick ties and crack stitching
When cavity brick or block structures are built, brick ties are often used to link the two layers together and provide additional structural integrity. Brick ties are a metal, usually galvanised, device that binds the internal and external walls. Over time, especially if galvanising is inadequate, the brick ties can corrode and no longer provide support. This can lead to cracks in the walls.
To counter failing brick ties, stainless steel helical ties can be used. The new ties stitch the wall back together and provide the same support as the original ties. Being made of stainless steel provides additional resistance to corrosion.
Crack stitching using profiled stainless steel bars, resin grout and other innovative products and materials can be an effective method of repair when improvements are needed to the structural strength of concrete, stone or brick structures.