Stain on a beam below a concealed shower
The property
A listed timber-framed house in the old part of town, with a shower set into a stud wall upstairs and a beamed sitting room below.
The problem
A dark mark spread along a beam beneath the shower, even on days nobody showered. A tiler had already resealed the tray, and the mark kept growing.
How we found it
Moisture readings led to the wall behind the shower valve. Pressure tests on its feeds showed the hot side falling, and listening at the wall picked up the escaping water.
The outcome
The repair, quoted separately, went in through a small panel on the bedroom side at the marked spot, so the shower tiles were spared. The report went with the claim.