Metal detector

Tips

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.