Leak detection in Derry / Londonderry

Damp patches, falling boiler pressure or water where it should not be? We help homes and businesses in Derry / Londonderry find hidden leaks and understand the repair needed. Call to discuss your property and arrange the next step.

A local job example

Resolving heating pressure loss in Waterside

Waterside, Derry / Londonderry · Bungalow · Around August 2026

The problem

A homeowner in Waterside contacted us about persistent pressure drops in their heating system. The leak was concealed beneath the kitchen floor.

The investigation

The engineer used acoustic investigation alongside tracer gas testing to narrow down the source. Together, the checks located the affected pipe beneath a kitchen tile.

The outcome

One tile was removed to reach the pipe, which was repaired during the visit. A trace-and-access summary recorded the findings, access and completed repair for insurance purposes.

Pipe exposed through a rectangular opening in beige floor tiles
Illustrative job photo. Example of targeted access beneath a tiled floor.

Find the leak. Understand the repair.

Start with the symptoms

You do not need to know where the leak is before calling. Explain what you have noticed and any previous tests or repairs. The investigation is chosen to suit the symptoms, pipework and access.

Know what happens after it is found

Specialist methods help focus access where it is needed. Engineers usually repair leaks too, but the findings, access and parts determine what can be completed during the visit. Agree the repair scope and price before work begins.

From your first call to the next step

  1. 01

    Explain the symptoms

    Tell us the postcode, what has changed and whether water is still escaping. Mention access restrictions or shared pipework.

  2. 02

    Agree the survey and price

    Confirm availability, investigation scope and price before booking, including any report or access work you need.

  3. 03

    Review findings and repairs

    Use the findings to agree the repair and any further work. Drying or reinstatement may need a separate trade or quote.

Coverage in and around Derry / Londonderry

Enquiries are welcome across Derry / Londonderry and the following areas:

  • Cityside
  • Waterside
  • Bogside
  • Creggan
  • Limavady
  • Claudy
  • Eglinton
  • Newbuildings
  • Strabane

Give us your postcode to confirm location and attendance arrangements. For a property elsewhere in Northern Ireland, see our wider coverage.

Questions before you book

Can you attend urgently in Derry / Londonderry?

Call to explain the urgency and confirm availability. If water is actively escaping, use the telephone rather than waiting for a callback. An enquiry does not book an emergency visit.

What will the survey cost?

The quote depends on the property and problem. Agree the investigation price before booking and ask about separate access, repair, report or attendance charges.

Will the engineer repair the leak?

Engineers usually repair leaks. Completion during the detection visit depends on the findings, access, parts and agreed scope. Ask what is included and whether further attendance is needed.

Will walls or floors need to be opened?

Specialist checks help narrow down the source and focus access work. A floor or wall may still need opening to reach the pipe. Agree any access and making-good work before proceeding.

Can I get a report for an insurance claim?

Tell us before booking. A leak-detection report is needed for claims assistance following a leak; agree its content and cost with the contractor. PCLA’s optional water-damage survey and claims service are separate. Insurance cover depends on your policy and circumstances.

Who carries out and charges for the work?

You contract with and pay the independent contractor directly. NI Leak Detection arranges the introduction and receives no commission or financial reward for it.

Need help finding a leak in Derry / Londonderry?

Tell us what you have noticed and where the property is. You do not need to identify the cause before calling or requesting a callback.