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- Bosch Detector Truvo £36 Amazon works well for surface metal.
- Nuzamas Hand Held Metal Detector – £16 Amazon – less easy to use, but provides greater depth.
- 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.
- Use to identify and then check (with endoscope) for cavity wall tie corrosion.