Leak Detection in Slab Leak Detection: Local Knowledge
A slab leak is one of the trickier faults to track down, because the pipe sits under a solid concrete floor with nothing to open up and no easy way in. Watch for a warm area on a floor that should be cold, a tile that has cracked or lifted for no clear reason, a damp musty smell coming up from ground level, or a boiler that keeps dropping pressure while nothing shows above the floor. With no cavity to inspect and no access point, this kind of leak can sit hidden for months before anyone works out what is wrong.
Thermal imaging earns its keep on this job. A pipe leaking under the slab tends to leave a warm patch on the surface if it is a heating run, or a cooler damp patch if it is a cold supply, and either stands out clearly against the rest of the floor. Acoustic listening backs that up, catching the sound of pressurised water escaping wherever the slab can be reached, such as where a pipe climbs into a wall. If the spot still needs nailing down before anyone opens the concrete, we feed tracer gas into the isolated pipe, a safe blend of 5% hydrogen and 95% nitrogen, then pick it up at the surface with a probe. On a heating circuit, a boiler that will not hold above its usual 1 to 1.5 bar cold reading is often the first clue a slab leak is in play.
Our slab leak surveys run right across Scotland, with insurance-ready reports, same-day attendance where we can manage it, and a free quote before we start.
Slab Leak Detection Leak Detection FAQs
How can you find a leak under a solid concrete floor?
Thermal imaging is normally where we begin, because a pipe leaking under the slab leaves a clear warm or cool mark on the floor above it. We then lock down the exact spot with acoustic listening or tracer gas before anyone touches the concrete.
Is slab leak detection suitable for both older and newer properties?
Yes. It works on solid floors of any age, from old concrete ground floors to modern slab-on-grade new builds. The build affects which method leads, but the non-invasive approach fits both.
Will you need to break into my floor to find a slab leak?
Not for the survey, no. Every detection method we use reads from the surface, and opening a slab only comes up once we have confirmed a tight, precise spot for the repair itself.
How accurate is thermal imaging at finding a leak under a slab?
For this particular fault it is one of the surest methods, since a leaking pipe reliably shifts the floor's temperature pattern. We pair it with acoustic listening or tracer gas so the final spot is proven by more than one reading.
Would insurance help cover the cost of finding a slab leak?
Often it does. Confused.com notes that most buildings policies carry trace-and-access cover, commonly up to around ยฃ5,000, which usually pays for the survey and any access work needed to find a leak like this, on top of the repair itself.
Slab Leak Detection Across Scotland
We track down water leaks hiding under concrete slabs, solid floors and foundations. Our non-invasive kit pins the leak down without tearing your floors open, so you get the source of the problem fast and skip the cost and mess of needless digging.
Think a Pipe Is Leaking Under Your Floor?
Left alone, a slab leak works away at your foundations. Get our engineers on it now.
๐ Get A Free Quote: 07700 152 467When a Slab Leak Survey Is Worth Booking
A leak under a concrete slab is hard to find and, left running, it can do real structural harm. Water escaping below the floor washes out foundations, brings on subsidence and racks up heavy repair bills. Spot the early warning signs and you head off the worst of the damage.
MCR Leak Detection tracks down these hidden leaks with kit that leaves your floors intact. We have worked on Scottish homes of every sort, from new builds sitting on solid concrete to older places built the traditional way, so we know exactly what a slab throws at you.
Bills Creeping Up
The meter keeps ticking over with every tap shut off, or your bill jumps with no change in how much you use. Both point straight at a leak under the slab.
Warm or Cold Patches Underfoot
Part of the floor feels oddly warm from a hot pipe, or cold from a cold supply. You notice it most on tile or vinyl.
Fresh Cracks Appearing
New cracks in walls, floors or ceilings can mean the foundation is shifting as water from a slab leak washes the ground out beneath it.
Damp That Will Not Dry
Wet marks or damp patches on a solid floor that never dry out, especially when nothing above could be causing them.
Water You Can Hear Running
Water you can hear moving below the floor while no tap or appliance is on means a pipe under the slab is leaking.
Musty Smell or Mould
A lingering musty smell or mould low down, often along the skirting, tells you moisture from a slab leak is working its way up.
Critical: A slab leak can undermine foundations, weaken the structure and breed mould that harms your health. Given how wet Scotland gets, water sitting under the slab can bring on serious subsidence. Find it early and you avoid disaster and save thousands on repairs.
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How We Track Down a Slab Leak
Locating a leak under a concrete slab takes the right gear and a trained eye. The old way meant ripping up whole stretches of floor, with all the upheaval, mess and repair costs that brings. We read the leak straight through the concrete with modern kit instead, keeping your floors and your wallet in one piece.
We run several detection methods side by side to fix a slab leak to the inch. Each one is strong at a different thing, so our engineers pick the mix that suits the job in front of them.
Acoustic Ground Microphones
Our acoustic listening equipment picks up the sound of water forcing its way out of pipes under the slab. The ground microphones are sensitive enough to hear a leak through several feet of concrete and mark its spot without any drilling or digging.
Thermal Imaging Cameras
Our thermal imaging cameras show the temperature shifts on the floor that water below the slab leaves behind. A hot pipe reads as a warm patch and a cold supply as a cool one, which lets us plot the leak with real accuracy.
Tracer Gas Detection
When a slab leak is playing hard to find, we turn to tracer gas. A safe hydrogen-nitrogen blend goes into the pipework, escapes at the fault and rises up through the concrete, where our probe catches it at the surface.
Electronic Leak Correlators
Correlator units read the vibrations that pressurised water sends out as it escapes. With sensors set at two points, the kit works out where the leak sits by calculation, which is a strong bet for mains water pipes running under a slab.
Moisture Mapping
Moisture meters and hygrometers chart how far the water has spread around and beneath the slab. That tells us how bad the leak is and flags any knock-on damp that needs sorting when the repair goes in.
Pipe Tracing Equipment
Electronic pipe and cable locators map the route of the services buried under the slab. Knowing where the pipes run cuts down the search area and keeps us from disturbing other utilities as we work.
Because we combine several methods, we find slab leaks accurately whatever the concrete thickness, pipe depth or type of building. We have located leaks in everything from modern raft foundations to the floors of old Scottish stone buildings.
How the Survey Runs, Step by Step
We work through a set order to find leaks under concrete quickly. It keeps the upheaval down and lands us on the leak without any needless damage to your floor.
First Look
We go over what you have noticed, check any building plans you can find and work out how the water runs beneath your slab. That sets us up to plan the sharpest way in.
Isolating the Services
We shut off each water service in turn to see whether the fault sits on hot, cold, heating or drainage. That alone shrinks the search right down.
Bringing In the Kit
With acoustic listening, thermal imaging and whatever else the job calls for, we scan the concrete floor section by section to find where the leak sits under the slab.
Marking the Exact Spot
We mark the leak on your floor to the inch and show you the readings on our kit, so you can see for yourself where the trouble is before any repair starts.
Checking the Damage
We look at how far the water has travelled under the slab, check what it has done to the foundation and pick up any further damp. Nothing gets missed.
Report and Next Steps
You get a full written report with findings, photos and what we advise for the fix. For a claim, it holds all the technical detail insurers ask for. We can sort the repair through our trusted contacts or brief whoever you would rather use.
Stop a Slab Leak Before It Reaches Your Foundations
Slab leak surveys across Scotland by people who do this every day. Look after your property now.
Why Homeowners Call Us for Slab Leaks
Slab Leaks We Sort Out
Slab leaks come with their own quirks and need a specialist eye. Water under concrete can travel a long way from the actual fault, which is why accurate detection matters so much. We have dealt with just about every kind of under-slab leak a Scottish property can throw up.
Supply Pipe Leaks
Mains pipes buried under a slab can start leaking through corrosion, ground movement or a poor fit-out. We find them with acoustic kit and pressure testing.
Hot Water Pipe Leaks
A hot pipe leaking below the slab leaves a warm patch on the floor while it wastes energy, water and, in time, your foundation. Thermal imaging picks it out straight away.
Heating Pipes Under the Floor
Heating pipes set into screed or run below a slab call for proper central heating leak detection. We use tracer gas to find them without harming the floor.
Underfloor Heating in Screed
Modern underfloor heating laid in screed over a slab tends to leak at joints and bends. Finding the exact spot saves you replacing the whole floor.
Leaks at Foundation Level
A leak down at foundation level can bring on serious trouble, subsidence and cracked walls among it. We catch these early and keep the damage from spreading through the structure.
Commercial Slab Leaks
Big commercial premises with acres of concrete floor need a methodical search. We cover warehouses, shops and offices right across Scotland.
Drainage Leaks Under Slabs
Waste pipes under concrete can crack or pull apart, letting foul water leak beneath the slab. We track those down with dye testing and CCTV alongside our detection kit.
Frost Damage Below Ground
A hard Scottish winter can freeze pipes even under the ground. We find burst pipes below slabs after frost damage, which matters most where the services run shallow.
Whatever the slab leak, we have the gear and the experience to sort it. Our trace and access service keeps the mess down when a pipe has to be reached for repair.
Book Your Slab Leak Survey Today
Head off foundation damage and keep your building sound
Deal With Your Slab Leak Now
Do not let water under your concrete slab eat into your foundations. Our engineers will find the leak quickly and accurately, with no floor ripped up for the sake of it.
Why Moving Quickly on a Slab Leak Pays Off
Few water problems are as serious as a slab leak. The water does not simply drain away. It washes out soil, undermines foundations and, left unchecked, can bring on structural failure. With Scotland's heavy rain and sodden ground, foundations already have enough to cope with before a slab leak piles on.
Trapped under the slab, the water can only travel sideways, carrying the damage well away from where the leak began. It can reach several rooms, ruin flooring across the property and set up perfect conditions for mould. A small leak under the floor can turn into a full structural crisis before long.
Whether it is a modern place on a concrete raft or an older building with a solid ground floor, each has its own snags. Older pipes may simply be worn out, while newer builds can suffer fit-out faults or ground movement. Our kit works just as well on any concrete thickness and any type of build.
Catching a slab leak early saves money and spares you the upheaval of major foundation work. We have seen homes where waiting too long meant rebuilding the whole ground floor, and a timely survey would have stopped it dead.
Do not gamble with your foundations. Call MCR Leak Detection today for a slab leak survey that keeps your home sound.