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Cavity wall tie corrosion is the term used when the cavity wall ties bedded in a property with a cavity wall construction corrode due to the breakdown of their protective coating.
Wall tie corrosion can seriously damage external walls and could, in some cases, make a building unstable.
According to BRE research out of nine million dwellings constructed with cavity walls, two million suffer wall tie corrosion or failure and are in need of specialist remedial wall tie replacement. Often the problem is found to be exacerbated by insufficient ties having been installed during construction.
The 25 years guarantee is covered by the WTIF.
What Are Cavity Wall Ties?
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Horizontal Cracks - in the mortar, usually at high level caused by expansion of wall ties
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Bulging brickwork - caused by snapped wall ties which have corroded, this can make your property unstable
Causes
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Inadequate protection - prior to the 1930s ties were not galvanised
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Substandard galvanising - the British Standard for weight of galvanising was actually reduced between 1964 and 1981
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Chemical action - for instance where corrosive black ash mortar has been used
How To Identify Cavity Wall Tie Failure:
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Drilling holes in brickwork for access to wall ties (using the appropriate access equipment where needed)
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Installation of new stainless steel wall ties
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Isolation if necessary of existing wall ties to prevent further damage
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Preserving the appearance of your property - make drilled holes good to match the existing wall appearance
Wall Tie Replacement:
For more information about our wall tie services in Gateshead, call Abbey Damp & Wall Ties
07795 660 695
