This blog provides additional guidelines for replacing wall ties for existing buildings. Any work done during construction must be carried out in compliance with the appropriate tolerances.
Cavity walls that incorporate metal tie-ups have been used in the late 19th century. They are prevalent in houses built from the beginning into the century of the twentieth century. You can get the best services of wall tie replacement in Sydney via www.keystonepointing.com.au/wall-tie-replacement-sydney.
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Huge numbers of these homes were constructed during the construction boom in the 1930s. Since 1950, the cavity wall has been the norm of construction for homes and other buildings of a similar size.
The goal of the cavity wall was to enhance the weather resistance of the conventional 225mm masonry wall, by dividing it into two pieces comprised of 112mm of brick and linked by ties made of metal.
A cavity wall can be determined by studying the pattern or bond that the bricks have. If all bricks are laid with longer edges ('stretchers') facing you then it is a cavity wall. If all bricks laid out with shorter edges ('header') facing you then the wall is solid. 'Headers are employed to improve the strength and durability of the wall.
If, however, the wall has been rendered or plastered and the bond is not observed, then the most effective method to determine its structure is to cut a small hole in the exterior to a depth of around 130mm. If there is no visible cavity through this method, then the wall will be considered solid. This can be verified by measuring the wall's thickness in door openings and windows that reveal.