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Underfloor heating leak detection

A loop losing pressure does not require the floor to be lifted. It requires the break to be located accurately.

Call 0333 567 2635

Seven days a week, 7am to 9pm

What usually brings us out

  • The system losing pressure faster than the rest of the heating
  • A cold stripe or a cold zone in an otherwise warm floor
  • Damp showing at a skirting or a door threshold
  • A manifold that needs bleeding far more often than it used to

How we go about it

  1. 1Isolate loop by loop at the manifold to find the one at fault
  2. 2Thermal survey of the floor to map the pipe layout before anything else
  3. 3Tracer gas through the affected loop only
  4. 4Acoustic confirmation, then a mark on the floor the size of a saucer

Underfloor heating in one visit

Accurate location is what keeps an underfloor repair to a single opening rather than a full screed lift.

Call 0333 567 2635

Jobs like this one

  • The split in the 22 mm PEX underfloor heating pipe, cut out and held up to the cameraMarlborough · James Bexter

    No pressure held, and air audible through a wall

    An underfloor circuit that would not hold two bar for a moment. Acoustic listening took it from "somewhere in the ground floor" to one corner of one room.

    Leak found in buried PEX pipework, corner of office room.

Reviews of the engineers who do this work

TrustScore 4.7 from 1,629 reviews

Read every review on Trustpilot

Read 7 October 2026

  • Excellent Leak Detection and Repair

    We had a major water leak of approximately 220 litres per hour and, with a holiday booked only a few days later, we urgently needed someone to find and repair it. […] Frank arrived at our house. He was extremely polite, professional and clearly very experienced. He quickly set up the equipment, carried out a tracer gas test and pinpointed the leak to an area just outside our garage underneath the driveway. […] The whole job, from arriving at our house to finding and repairing a 220 litre-per-hour leak, was completed in around three hours.

    Shortened. The marks show where text was left out.

    Peter JorgensenRead it on Trustpilot

  • Fast, effective leak diagnosis and repair

    Fundamentally, the engineer (Mark Pavitt) identified the source of the leak, repaired it and had our house back up and running within the same day. As part of achieving this, he kept the damage to a minimum (only having to cut out sections of the kitchen plasterboard ceiling). He cleaned up the debris, was polite, cheerful and informative of root cause and actions throughout the day. I think the key to success is having an engineer that has expertise in both leak detection and plumbing.

    R. CreganRead it on Trustpilot

  • Very professional and swift service

    Very professional and swift service. Frank arrived and had detected and repaired the leak within 3 hours. Would highly recommend

    Carolyn H.Read it on Trustpilot

Other leaks we find

Speak to the team that books the engineers.

One call confirms the earliest available date and the price, before you commit to anything.

  • You describe what you have seen
  • We find the nearest available engineer
  • You get a date and a price before booking
0333 567 2635Call now

Seven days a week, 7am to 9pm. Most home insurance covers the cost of finding a hidden leak.