Underfloor Heating Leak Investigation
If you suspect a leak in your wet underfloor heating, a proper investigation helps you find the source quickly and avoid unnecessary floor disruption. This service is designed to confirm whether there is a leak, pinpoint the most likely location, and set out clear next steps for repair and recommissioning.
More information
What an underfloor heating leak investigation covers
A focused diagnostic visit to identify the cause and location of a suspected leak in wet underfloor heating pipework and associated components. The aim is to reduce guesswork, limit disruption, and give you clear options.
- Symptom review (pressure loss, cold zones, damp patches, boiler top-ups)
- Visual checks of accessible components such as the manifold, valves, pump, and controls
- System pressure testing to confirm whether a leak is present
- Circuit isolation to narrow the issue to a specific loop where possible
- Targeted leak detection methods (for example thermal checks and moisture readings), chosen to suit the site
- Clear findings and recommended repair approach (spot repair, circuit replacement, manifold repair, or further access)
When this service is the right fit
This investigation is most useful when you need answers before lifting floors or arranging wider works.
Common scenarios include:
- Repeated pressure drops in the underfloor heating circuit
- One or more rooms not heating evenly despite normal boiler operation
- Unexplained damp, staining, or musty odours near heated areas
- A landlord or small commercial site needing a documented diagnosis before authorising remedial work
How the investigation is carried out
You will be talked through what is being checked and why, in plain language. Testing normally starts with the manifold and accessible pipework, then moves to pressure and flow checks to narrow down the fault.
If the leak appears to be within the floor, the goal is to pinpoint the most likely area so any exposure is limited. If evidence suggests the issue is not a pipe leak (for example a valve, connection, or filling loop), you will be advised accordingly.
What happens after the investigation
You will receive a clear summary of the results and the recommended next steps. If repair work is needed, the findings are used to plan the most efficient fix and help avoid unnecessary lifting of floors.
Once repairs are completed, the system can be refilled, purged, and balanced so it runs efficiently and heats evenly.