The subject buildings form an estate of terraced and semi-detached social street housing of cavity construction under pitched roofs.
The existing wall ties viewed were found to be mild steel vertical twist ties, commonly known as fishtail ties. The galvanised coating was found to be in varying stages of corrosion, blackened with red rusting noted.
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, in turn lifting and cracking the brickwork.
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 re-pointing.
Action Wall Ties (AWT), covering Kent, London, Surrey and Sussex are specialists wall tie replacement and in masonry reinforcement and repair, providing professional solutions to a wide variety of structural problems. Contact us on 01227 721 255, or email us.