Leak Detection in Shefford
Find the leak first, then decide what to dig up
Nobody should be lifting a tiled floor on a guess. We locate the leak with thermal imaging, acoustic equipment, tracer gas and moisture meters, then tell you exactly what needs opening and how much of it.
Vantage Plumbing and Heating covers Shefford and the whole of SG17 from Stevenage, about fifteen miles away on the A600. Gas Safe registered under 956889, 12 month workmanship guarantee, and a genuine 24/7 line for the calls that cannot wait.
Ground, water and why Shefford makes leaks harder to find
Shefford sits at a confluence. The River Flit and the River Hit meet close to Northbridge Street, and the combined watercourse became the Ivel Navigation, extended up to Shefford in 1823 and closed in 1876, feeding into the wider Ivel system that runs on to join the Great Ouse at Tempsford. The bridges that give Northbridge Street and Southbridge Street their names are the crossings of those two rivers.
That geography is the single biggest complicating factor in finding a leak in this town, and it is why we approach Shefford jobs differently to a job in a dry, elevated village.
Here is the practical problem. Leak detection works by finding water where water should not be. In a property close to the two river channels, the ground under and around the building already carries moisture. A damp underfloor void, a damp wall base or a moisture meter reading that would be conclusive elsewhere is simply not conclusive here. Somebody who turns up with a moisture meter alone will point at the wettest patch and be wrong more often than they are right.
So near the crossings and along the low ground we work by elimination and by temperature, not by dampness. We isolate sections of pipework and pressure test them. We use thermal imaging to look for the temperature signature of a heating or hot water leak, which behaves quite differently to ground moisture. Where a cold water leak is suspected under a floor, tracer gas is often the only method that gives a clean answer, because the gas comes up through the floor at the leak point regardless of how wet the surrounding ground already is.
One thing we will not do is tell you what flood zone your property is in. That mapping is published by the authorities and it is worth checking properly, but we are heating and plumbing engineers, not flood risk consultants, and we are not going to guess at a designation to make a page sound knowledgeable.
Worth mentioning the old navigation too, because a canal that closed in 1876 leaves ground that has been dug, filled and built over since, and made ground behaves unpredictably around buried pipework.
Who owns the pipe, and why that decides who pays
Anglian Water supplies water to Shefford and is also the sewerage undertaker here. Affinity Water does not supply this part of Bedfordshire, whatever a previous address might have led you to assume.
The split of responsibility is the same principle everywhere, and it costs people money when they get it wrong. Anglian Water is responsible for the water main and the communication pipe up to your property boundary. From the boundary to the house, the supply pipe belongs to you. If it leaks under your drive, it is your leak, your excavation and your water going into the ground.
The first sign is almost never a puddle. It is a water bill that has gone up without any change in the household, or a meter that ticks over with every tap in the house shut off. If you are metered, that overnight meter test is the cheapest diagnostic there is, and you can do it yourself before you call anybody.
An underground supply pipe leak on a private drive is a job for acoustic correlation, listening equipment along the pipe run, and ground microphones. Digging on the basis of a wet patch is how people end up with three holes and no leak.
The leaks we get called to most
Under solid floors and screed. Both halves of Shefford throw these up, for different reasons. In the older properties on Ampthill Road and around the historic core, an original suspended timber floor has often been replaced at some point with a concrete slab during a kitchen or extension project, and the pipework was buried in it. In the modern housing east of Ivel Road, including the Lucas Gardens scheme of 90 homes launched in 2020, the pipework is in screed by design, frequently in continuous plastic runs from a manifold. The good news with a manifold system is that we can isolate loops one at a time and narrow the search down enormously before anything is lifted.
Underfloor heating. Increasingly common in extensions and in newer builds. A UFH leak is the ideal case for thermal imaging, because the pipe layout shows up as a pattern and the leak shows as a distortion in that pattern. We survey the whole floor cold, then run the circuits and survey again. Done properly it locates the fault to within a small area, which is the difference between lifting one square metre of tile and lifting a room.
Shower trays and wet rooms. The most frequently misdiagnosed leak of the lot. Water appearing on a ceiling below a bathroom is assumed to be a plumbing leak. Often it is a sealing failure: a perished seal at the tray to wall junction, a failed grout line, a screen sealed on the wrong side, or tanking that was never taken far enough up the wall. We test with the waste plugged and the tray flooded, and separately with the shower running against the walls, because those two tests point at completely different faults. Telling you it is a sealing failure and not a pipe saves you a great deal of money, even though it is a smaller invoice for us.
Central heating pressure loss. A combi that needs topping up every week is losing water somewhere. Sometimes it is the pressure relief valve discharging outside, which is not a leak in the system at all and is a five minute check at the external discharge pipe. Sometimes it is a pinhole in a buried pipe. Easy things first.
Old supply pipework in the historic core. The oldest housing in Shefford is properly old. The street pattern through the middle of town has been essentially unchanged since 1736, and the buildings on the High Street and around the two bridges include Grade II listed properties like Tudor House at 36 to 38 High Street and Bloomfield House on Northbridge Street. In stock of that age we still occasionally find lead and galvanised iron supply pipework, sometimes only in short surviving lengths. Old iron corrodes from the inside and eventually perforates. Lead does not so much fail as become an issue you want to deal with anyway. Either way, a leak in that pipework in a listed or conservation area building is a job where the access route matters as much as the repair, which is exactly why non invasive detection earns its money here.
The equipment, and what each part is for
Thermal imaging. Finds temperature differences. Excellent for heating leaks, hot water leaks and underfloor heating. Useless on its own for a cold water leak in cold ground, which is why nobody serious relies on it alone.
Acoustic listening and correlation. Pressurised water escaping through a small hole makes a characteristic noise that travels along the pipe. Ground microphones and correlators locate the loudest point. This is the main tool for buried supply pipes on drives and gardens, on metal pipe. The plastic runs on the newer housing carry sound poorly, so there tracer gas does the work.
Tracer gas. A hydrogen and nitrogen mix introduced into the drained pipework. It is a small molecule, it escapes at the leak, it rises through the floor covering and a detector picks it up at the surface. This is what finds the difficult ones under solid floors and in wet ground, and it is the method that copes best with the conditions near the rivers.
Moisture meters and cameras. Supporting evidence, and useful for mapping the extent of damage once the source is confirmed. Not a substitute for locating the source.
Pressure testing and isolation. Not glamorous, but it is what confirms a finding before anybody cuts a floor. We do not report a leak we have not proven.
Insurance and trace and access
Many household buildings policies include trace and access cover. It is the cost of finding a leak and making good the damage caused by getting to it, which is separate from the repair of the pipe itself. Cover limits vary. Read your schedule and ring your insurer before work starts, because policies differ and it is not our decision.
What we give you is evidence rather than an opinion: a written report with the detection method used, the location of the fault, thermal images where relevant, and a clear description of what access is required. We have written enough of them to know what a loss adjuster is looking for.
If your leak is on the private supply pipe outside the house, check your policy and also check with Anglian Water, because water companies operate their own arrangements for customer supply pipe leaks and the terms are worth knowing before you commit to a repair.
What it costs
We charge for detection as a defined piece of work, quoted before we attend, based on the property and what we have been told about the symptoms. We do not quote a repair blind, because until the leak is located neither of us knows what the repair is.
What we will not do is turn up, poke about for an hour, and hand you an invoice with no answer. If we cannot locate it with the equipment we have, we tell you that, we tell you what the next step would be, and we do not charge you as though we had found it.
Trusted & Accredited Professionals
Related work in Shefford
Leak detection often turns into pipework replacement, a repair under a floor, a section of supply pipe renewed, or a bathroom that needs resealing or retanking properly. We do all of that, so the person who found the fault is the person who fixes it. Where a leak turns out to be a drainage problem rather than a supply one, we have the CCTV equipment for that too.
Areas we cover for leak detection around Shefford
Shefford and SG17, plus Campton, Clifton, Meppershall, Southill, Stanford, Henlow, Chicksands, Beadlow and Stotfold.
Nearby: Leak detection in Henlow · Leak detection in Ampthill · Leak detection in Flitwick
Once a leak is found it still needs fixing. Plumbers in Shefford covers the everyday plumbing work.
Why Choose Vantage?
With a 4.9 rating on Google and more than 700 reviews across Google, Checkatrade and Trustatrader, fully qualified and accredited engineers, transparent pricing, and a 2-year labour guarantee on every job, Vantage delivers reliable, high-quality workmanship you can trust with fast response times, and genuine local service.
- Five-star Google reviews
- Gas Safe Registered No. 956889
- CHAS Registered
- City & Guilds qualified
- Checkatrade approved
- 2 year labour guarantee on every job
- Fully stocked vans most jobs fixed on the first visit
- Established local business with a dedicated office team and multiple qualified engineers
- No job too small
- Transparent pricing with a fixed price provided before any work begins
- 700+ reviews across Google, Checkatrade and Trustatrader, 4.9 on Google
Frequently Asked Questions
How do I know I have a hidden leak?
A rising water bill with no change in usage, a heating system that keeps losing pressure, unexplained damp, a warm patch on a floor, or a water meter that moves with everything turned off.
Will you have to dig up my floor?
Not to find it. The whole point of thermal imaging, acoustic tracing and tracer gas is to locate the fault first so that only the necessary area gets opened.
Does the ground near the rivers make detection harder?
It makes moisture readings much less reliable, yes. The Flit and the Hit meet near Northbridge Street and the ground nearby carries water anyway, so we lean on tracer gas, isolation and pressure testing rather than damp readings.
Who is responsible for a leaking supply pipe?
Anglian Water up to your boundary, and you from the boundary into the house. It is worth asking Anglian Water what assistance they offer on customer supply pipes before you commit.
Will my insurance pay for this?
Look through your schedule and take it up with your insurer, because policies differ and only they can decide. Check for trace and access cover, and look at the limit. We provide the report they ask for.
Can you find a leak in underfloor heating?
Yes. UFH is one of the clearest cases for thermal imaging, and we survey the floor both cold and running to isolate the fault area.
Get the leak found properly in Shefford
Call 01462 506374 and describe the symptoms. We will tell you which method suits the property and what the detection will cost before we come out.