Wall tie is a steel bar, strap or twisted wire which is built into a double skin or cavity wall to hold the masonry together; usually made of mild steel. Wall ties are crucial to the stability of external walls.
Older ties were made of a thick mild steel bar formed into the shape of a fishtail. More modern ties are made of a twisted wire and form the shape of a butterfly. Any building with cavity walls built prior to 1981, an estimated 10 million dwellings, could be prone to wall tie corrosion and failure.
How Important Are Wall Ties?
If the steel of a wall tie is exposed to air and oxygen, the all too familiar rusting cycle begins. The loss, by rusting and corrosion, of the wall tie is one problem but the other major consideration is the increased volume of the steel, causing mortar to split and lift. This will result in instability of the cavity wall and the likelihood of it moving out of plumb.
Wall Ties in Manchester
Locally based in Manchester, A1 Damp Proofing cover the Greater Manchester area including Manchester, Salford, Walkden, Worsley, Swinton, Tyldesley, Atherton, Leigh, Wigan, Bolton, Farnworth and surrounding areas, so why not give us a call today!