Hidden leaks create uncertainty. You might see damp or staining, notice a musty smell, or have boiler pressure dropping without a clear reason. NI Leak Detection provides water leak detection services and leak detection services for homeowners in Coleraine, Northern Ireland.
We help you locate the source, explain what’s happening in your home, and carry out leak repairs.
Call to arrange leak detection and repair.
A quick phone call helps us understand what’s happening and the safest next step.

If you’re trying to work out whether you have a leak (and where it’s coming from), the priority is reducing guesswork and limiting ongoing damage.
We reduce the guesswork by narrowing down the most likely source of the leak.
You'll limit any ongoing damage by asking us to find the cause.
We'll put in place a targeted repair plan (and complete repairs as soon as possible).
For next steps including Trace and Access reporting where needed, helping you make informed decisions.
We focus on practical diagnosis and clear decisions, not vague assumptions.
Heating & plumbing engineers, who specialise in leak detection and repairs.
A clear, structured approach to testing and narrowing down the source of the leak.
Straightforward communication and practical guidance throughout.
We can provide insurer-ready reports when needed (Trace and Access), using insurance-safe wording.
Local service delivery across Northern Ireland, including Coleraine.
Quick questions first to understand symptoms, affected areas, and urgency.
Structured testing to narrow down the source, including pressure tests where appropriate.
Findings explained in plain language (what's likely happening and where).
Repair options outlined; repair completed where appropriate and agreed.
Documentation provided (photos and video when helpful, a written summary, and a Trace and Access report if requested).
Including any follow-on work that may be needed, such as optional damage restoration if you want us to help, or support for your chosen contractor.
A few practical notes:
To locate hidden water leaks, we may use a mix of methods and technology depending on the symptoms and pipework:
Using acoustic sensors, an acoustic ground microphone, and ultra-sensitive microphones to help pinpoint leak noise.
Thermal imaging and infrared checks using thermal imaging cameras (including FLIR where appropriate).
Tracer gas (hydrogen/nitrogen) and Tracer Gas Technology for hard-to-find leaks.
Moisture mapping using moisture meters to track how water is moving through materials.
Pressure tests where appropriate (for example with a hydraulic pressure testing pump), alongside other testing.
Pipe locating for buried water pipes and Underground Leak Detection on suspected mains runs.
(including RIDGID inspection camera / endoscope) and other cameras for visual checks in voids and service routes.
Leak detector tools selected to match the job, with a focus on clear findings over guesswork.
Leak issues are not always obvious at first. It is worth getting help if you’re seeing any of the following:
Or staining on ceilings or walls that keeps recurring despite treatment.
Mould that keeps returning in the same area despite cleaning and ventilation.
A musty smell or a damp feel in a room that persists.
Boiler pressure repeatedly dropping (sealed systems).
Or intermittent air in the lines that can't be explained.
Warped skirting, or bubbling paint that indicates water damage.
If water is near electrics, prioritise health and safety and contact a professional immediately.
Common sources we see in homes include bathroom & shower leaks (including failed grout lines), Mains water leaks, and hidden issues on water pipes. We also investigate heating systems such as Central heating leaks around radiators, and Underfloor heating leaks.
Often around grout lines, trays, and concealed pipework.
Including radiators and pipework on central heating and other heating systems
Hidden leaks in underfloor heating systems requiring specialised detection.
Affecting water pipes and incoming supplies, often causing pressure issues.
Where buried pipework is suspected of leaking, requiring specialised equipment.
That may need burst pipe repair and urgent isolation support to prevent damage.
“Trace and Access” refers to locating the leak and accessing the area to complete the repair, with documentation of what was found and what work was done.
Most UK home insurance policies distinguish between fixing the pipe (which is often a maintenance cost) and the damage caused to get to it. "Trace and Access" focuses on the latter.
If you're making an insurance claim, your insurer will likely need proof of where the leak was and what work was required to reach it.
Clear, fact-based documentation with photos of the leak and the access work.
A detailed record of what we found, helping you substantiate your claim.
Itemised breakdowns where needed to help you evidence the work.
While we cannot confirm your specific policy coverage, we give you the clear facts and professional evidence you need to support your claim.
If you’re seeing signs of a hidden leak in Coleraine, the safest next step is a short call so we can understand the symptoms and advise what to do next.
Leak detection is a structured process to narrow down where the leak is coming from and what is causing it. We use on-site checks, testing, and cameras where helpful to pinpoint the most likely source, then explain the findings and options clearly.
Where appropriate and agreed, yes. If the work is straightforward and access allows, we can carry out plumbing repairs to resolve the leak. If additional work is needed (for example, reinstatement after opening-up), we will explain the likely next steps.
Not always. It depends on where the leak is and what access is already available. We aim to reduce unnecessary opening-up where possible, but some access may be required to confirm the source and complete a proper repair.
Condensation and ventilation issues can look similar to a leak. Persistent staining, damp in the same area, musty smells, wet flooring, or boiler pressure dropping can indicate a leak. We’ll ask a few questions first, then test likely causes on site to help you get clarity.
Yes, where requested. We can provide a Trace and Access report documenting what was found, what was done to access the leak area, and what work was carried out, with photos where appropriate.
Cover depends on your policy wording and your insurer’s decision. What we can do is provide clear documentation that insurers may request when assessing “escape of water” situations, including evidence of the leak source and the access and repair work completed.
No. We are an independent leak detection and plumbing service. We can provide evidence-led findings and Trace and Access reporting that may help you submit information your insurer requests, but we are not a claims handler and cannot confirm outcomes.
If you are in Coleraine or nearby, call and we will confirm the best next step based on what you are seeing and where the issue appears.
If it’s safe to do so, limit water exposure to electrics and contact a professional. If there’s active ingress or visible escalation, treat it as urgent and call for guidance on the safest next step. If it appears to be a burst, we can advise on immediate steps and arrange burst pipe repair where appropriate.
We cover all of Coleraine and surrounding areas, including:
Castlerock, Portrush, Portstewart, Bushmills, Ballymoney.
We also provide Leak Detection Services across Northern Ireland.
Our engineers are local, and we also cover nearby towns and cities including:
- Leak Detection Armagh
- Leak Detection Ballymena
- Leak Detection Belfast;
- Leak Detection Bangor
- Leak Detection Derry;
- Leak Detection Lisburn;
- Leak Detection Newtownabbey.
Call us to find out how we can help you today.

NI Leak Detection delivers expert, non-invasive leak detection services for homes, businesses, and industrial sites across Northern Ireland. Using cutting-edge technology and a skilled team, we pinpoint leaks with precision, preventing unnecessary damage. Whether dealing with concealed water or gas leaks, or structural issues, our prompt and reliable solutions help you avoid costly repairs and safeguard your property.
NI Leak Detection, part of the PCLA group.
Property Claims Loss Assessors Ltd (PCLA) are authorised and regulated by the Financial Conduct Authority. FRN 933781.
NI Leak Detection is a trading name of Property Claims Loss Assessors LTD. By using the services of NI Leak Detection, you acknowledge and agree that all leak detection services are provided by independent third-party contractors introduced to you by NI Leak Detection.
NI Leak Detection acts solely as an introducer and does not supervise, manage, or control the services performed by third parties. All payments for services must be made directly to the respective third-party contractors. NI Leak Detection receives no commission or financial reward for providing this introduction service.
NI Leak Detection disclaims any and all responsibility or liability for the quality, workmanship, or suitability of services provided by third-party contractors.
To the fullest extent permitted by law, NI Leak Detection shall not be held liable for any loss, damage, or defects arising out of or in connection with the services provided by third-party contractors. Any concerns, disputes, or claims must be addressed directly to the contractor responsible for performing the services.
NI Leak Detection makes no representations or warranties, express or implied, regarding the services offered by third-party contractors, including but not limited to warranties of merchantability, fitness for a particular purpose, or quality of work.
This disclaimer is governed by and construed in accordance with the laws of the United Kingdom.