Grey patch on a utility room floor
The property
A newer estate home built on a concrete floor, where the cold feed to the utility room runs through the screed.
The problem
A grey patch on the utility room vinyl came back after the owner dried the corner and relaid the floor. Then a water company letter about continuous use arrived.
How we found it
Once the stop tap was shut, the meter stood still, so the leak was inside. Moisture readings mapped the wet screed, and tracer gas in the isolated cold pipe surfaced by the wall.
The outcome
A small square of screed came up at the mark, exposing a push-fit joint. We renewed it while we were there, at a separately agreed price.