If you’ve got damp that keeps returning, a Boiler that’s losing Pressure, or warm patches on tile, you may be dealing with a hidden leak beneath concrete.
NI Leak Detection provides slab leak detection services across Northern Ireland, with structured leak detection investigations to help you pinpoint leaks and plan repair work with confidence.
Call to discuss symptoms or book a visit.
A slab leak can involve small amounts of water over time, or significant water loss if a pressurised water pipe has failed. Some leaks stay hidden for weeks because the water escaping is buried under concrete and only becomes obvious once it rises through concrete into flooring, skirting, or plaster.
If you're seeing visible water, ceiling staining, or water near electrics, treat it as urgent and isolate the water supply if you know the Tap (valve) / stopcock location and it's safe to do so.
A slab leak is a water leak beneath a concrete floor or a concrete slab. People also search for "leaks under concrete" or "leak beneath the floor" because that's how it shows up in real life: damp, musty smells, pressure loss, or heating system leaks with no obvious source.
Concrete slab leak detection is simply the process of finding the leak location beneath your concrete so repair planning can be targeted, rather than lifting large areas on a hunch.
A leak beneath concrete can spread underground water and saturate floor build-up, insulation, and finishes. Over time, this can lead to water damage, persistent damp, and in some cases structural damage if the leak happens unchecked.
The practical reason to act is simple: locating the source early can reduce disruption and help protect your property by keeping access and repairs focused on the right spot.
In Northern Ireland properties, slab leaks are commonly linked to:
You might have a leak beneath the slab even if there's no visible water yet, especially where piping is buried under concrete and the water loss disperses into the subfloor.
We're leak detection specialists. Our job is to locate leaks and confirm the most likely leak locations using evidence-led testing, so you can make an informed decision about repair.
We start with your Information: when you first noticed damp, whether Boiler Pressure drops, and whether the Heating system behaviour has changed.
We use specialist leak detection services and structured detection methods to narrow down the area beneath concrete.
We aim to pinpoint leaks to a workable access point, so you're not lifting floors unnecessarily.
If access is required, we agree the smallest practical access point first (for example, a small hole or a single tile lift, depending on finishes and layout).
Where appropriate and agreed, we can carry out pipe repairs. If additional trades are needed for reinstatement, we'll explain what's involved and what to do next.
This is what "expert slab leak detection services" should feel like: calm, structured, and based on what the tests show, not guesses.
The equipment used depends on the type of water leak, the size of the property, the floor construction, and whether the issue looks more like hot water leaks, mains pressure problems, or heating system leaks.
Depending on conditions, our detection technology may include:
We use advanced equipment where it genuinely helps, but the priority is always the same: use the right detection methods for the job and document what we found.
Most people worry about disruption first, especially with a concrete floor.
Our aim is minimal disruption, but it's important to be clear:
If you need reinstatement after access, we can explain what's typically involved and what a Plumber or Tradesperson may need to do next, depending on your finishes.
Once we've found a leak and confirmed the most likely leak locations, the next step is repair planning.
Repairs vary depending on whether the issue is:
Where appropriate and agreed, we can plumb and complete plumbing repair on the visit, or agree a return plan if parts, drying time, or access constraints apply. We'll explain the repair options in plain terms so you can decide.
Cost depends on access, the detection methods required, and whether repair work is needed after the investigation.
In most cases, pricing breaks down into:
(attendance and testing)
(if needed to reach the pipe)
(pipe repairs / replacement where appropriate)
(Trace and Access reporting)
If you share the symptoms, property type, and what rooms are affected (for example a Bathroom), we can advise what information helps before booking.
If you’re involving Insurance, you may hear the term trace and access. It usually refers to the work needed to locate the leak and access it for repair, plus the documentation.
We can provide a Trace and Access report with clear findings and notes that insurance companies when processing an insurance claim may request. This can support your claims process, but cover depends on your Policy and what your insurer includes under leak insurance. Some documentation may be required by most insurance companies, but acceptance is never guaranteed.
If you’re making an insurance claim, it helps to keep:
Clear answers to your water damage restoration questions.
NI Leak Detection provides water leak detection services in Northern Ireland.
We use thermal imaging, acoustic sensors, and moisture mapping to find and repair leaks.
We help homeowners save money and protect property by preventing water damage.
We provide slab leak detection services throughout Northern Ireland, including Belfast and surrounding areas. If you’re unsure whether it’s a slab issue or something else, we’ll start with the symptoms and work from there.
028 9507 1126
Call to discuss symptoms or book a visit
