A cavity wall tie survey involves several steps:
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External Assessment: The surveyor examines the building’s exterior to identify construction details, the presence of a cavity, insulation, and any visible cracks or defects.
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Locating Wall Ties: A metal detector is used to find the positions of the wall ties.
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Inspection: Small inspection holes are drilled near the located ties, and a borescope (a type of endoscope) is used to visually assess their condition.
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Documentation: Photographs of the wall ties are taken for further analysis and record-keeping.
This procedure is straightforward and usually takes less than an hour.