Call 0333 567 2635

Bathroom leak detection

Water travels before it appears, so the mark on the ceiling is an unreliable guide to the fault above it.

Call 0333 567 2635

Seven days a week, 7am to 9pm

What usually brings us out

  • A stain on the ceiling under a bathroom that grows after a shower
  • Grout or sealant going dark along one edge
  • A shower tray or bath that flexes underfoot
  • Damp at the bottom of a wall on the other side of the bathroom

How we go about it

  1. 1Moisture mapping to show how far the water has actually travelled
  2. 2Comparative testing: tray, waste, overflow and seals one at a time
  3. 3Dye testing where two possible sources sit close together
  4. 4Borescope through a small hole rather than a hole you can see

Bathrooms, showers and wet rooms in one visit

Each fitting is tested separately, which is slow work. The engineer has the full day for it, so the testing is not cut short.

Call 0333 567 2635

Jobs like this one

  • A corroded joint on the copper cold feed pipe, exposed in the concrete beneath the bathroom floorOxford · Gabor Weber

    Damp in a corridor, and three circuits to rule out

    Damp on a corridor floor with nothing visible above it. Pressure testing each circuit separately put the fault on the cold feed, and acoustic listening put it under the bathroom tiles.

    Cold feed pipe leak found and repaired beneath bathroom floor.

  • The failed soldered fitting on the heating pipe, water pooling around it in the opened floorCamberwell, London · Aaron Baker

    A bar of pressure every twelve hours

    Heating pressure falling by about a bar every twelve hours, and damp in the bathroom where somebody had already had the floor up once.

    Failed copper fitting found and replaced beneath the bathroom floor.

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.