Damp along the base of a shared wall
The property
A concrete-built mid-terrace house with a solid ground floor, its heating pipes and next door's running in the floor near the party wall.
The problem
A dark tide mark crept up the living room wall beside next door. The owner's boiler held pressure, so suspicion fell on the neighbours.
How we found it
Moisture readings on both sides of the wall were highest on the neighbour's. Their ground-floor heating circuit failed a pressure test, and once it was warm, thermal imaging showed heat fanning out right where the readings peaked.
The outcome
We photographed and marked the point on the neighbour's side. Both households had the report, so the right owner could book the repair.