The subject property comprised a 1950s style two-storey semi-detached house of cavity wall brick construction.
Problem
The existing wall ties viewed were found to be mild steel vertical
twist ties, commonly known as fishtail ties. The wall ties were found
to be heavily corroded, fractured and delaminated.

The corrosion of the embedded mild steel wall ties had resulted in the
forming of ferrous oxide, which had expanded to several times the
thickness of the metal it had resulted from, lifting and cracking the
brickwork.
Solution
AWT completed a remedial programme providing a viable repair through
the introduction of a pattern of remedial wall ties and isolating the
existing ties, together with general brickwork repairs and weather
struck re-pointing.