Sitting room stain below a freestanding bath
The property
A large detached house extended twice, with four bathrooms. The main one has a freestanding bath mid-room, its pipes running under the timber floor to taps standing beside it.
The problem
A brown mark on the sitting room ceiling never quite dried. Both en suite showers nearby had been resealed, and the owners were ready to strip the main bathroom.
How we found it
Readings put the mark under the bath. Closing each bathroom's valves in turn, only the bath's cold feed lost pressure, and the ground microphone heard it hissing under the boards by the taps.
The outcome
We marked two boards beside the bath and photographed them. The repair was agreed before work started and done while we were there, so the bathroom stayed as it was.