Metal detector


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  1. Bosch Detector Truvo £36 Amazon works well for surface metal.
  2. Nuzamas Hand Held Metal Detector – £16 Amazon – less easy to use, but provides greater depth.
  3. Use metal detector to identify metal in walls,
    • Steel joist “RSJ”,
    • Embedded metal supporting a lintel,
    • Electrical wiring,
    • Metal mains water pipe,
    • Old gas pipe,
    • External wrought iron down-pipe,
    • Any other metal likely to result in a thermal bridge.
  4. Use to identify and then check (with endoscope) for cavity wall tie corrosion.

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