Leak Detection in Cambourne
Locate the leak before anybody lifts a floor
A leak you cannot see is not a reason to start opening floors. We find it first, with thermal imaging, acoustic equipment, tracer gas and moisture measurement, so if anything does have to come up, it is one small section in the right place.
Vantage Plumbing and Heating covers Cambourne and the villages around it from our base in Stevenage, about 22 miles away. Gas Safe registered under 956889, genuine 24 hour emergency cover 365 days a year, and a 12 month guarantee on our workmanship.
Vantage Plumbing and Heating covers Cambourne from our base in Stevenage. We are Gas Safe registered under 956889, we carry the common parts on the van, and we guarantee our labour for 12 months.
Cambourne is a new town, and that changes how leaks are found
Almost nothing in Cambourne existed before 1998. Construction started in June 1998 on former farmland, and the first house was occupied in August 1999. There is no Victorian stock, no lead supply pipe era, no cast iron. That sounds like it should mean no leaks, and it does not.
What it actually means is a different kind of leak, and a different way of finding it.
Plastic pipework run from manifolds. Late 1990s and 2000s new build commonly uses plastic barrier pipe rather than copper, often run from central manifolds rather than in the tee-off pattern of an older house. Two consequences follow. Plastic pipe carries sound poorly, so the acoustic listening kit that works well on a copper or iron main struggles on these runs, and tracer gas has to do more of the work. And a manifold system means the pipe rarely takes the route you would guess from the fittings you can see. We trace the actual run rather than assuming it.
Pipes buried in screed under solid ground floors. Most Cambourne ground floors are solid, with heating pipework and sometimes hot and cold runs set in or under the screed. A weep at a fitting down there shows nothing at the surface for months, then appears as a lifted floor finish, a musty smell or a boiler that keeps losing pressure. Thermal imaging and tracer gas find these without opening anything.
Heavy clay underneath the whole town. The ground Cambourne was built on is impervious clay, which is why the town drains through swales, basins and ponds rather than soakaways. For leak detection the clay cuts both ways. Escaping water cannot soak away, so an external supply pipe leak will often eventually show as a persistently wet patch of lawn or a puddle that outlasts the weather. But clay also holds water against the slab and footings, so a small leak under a house can sit there wetting the structure quietly instead of announcing itself.
Very hard water working on every joint. Cambridge Water supplies the town, and its published figure for the Coton supply zone that covers Cambourne is 317.8 mg/l calcium carbonate, which is above the 300 mg/l threshold water companies treat as very hard. That is Cambridge Water’s published zone figure, not our measurement. Scale builds inside fittings and valves, and on heating systems it accelerates the pinholing and weeping that ends up as a call to us.
The signs, in the order people notice them
The water bill. A Cambridge Water bill that jumps with no change in the household is the single most common trigger. If the meter keeps turning with every tap and appliance in the house off, you are very close to proof.
Boiler pressure dropping. Cambourne is overwhelmingly a combi boiler town, and a combi that needs topping up every week or two with nothing visible under any radiator is almost always losing water into a floor.
A warm patch of floor. Heating water leaking under screed warms the floor above it. People often notice it barefoot before they notice anything else.
Damp at the bottom of a wall, or a musty smell in one downstairs room. On a solid floor over clay, this is frequently a pipe rather than the condensation or rising damp it gets blamed on.
Standing water outside that does not fit the rain. On clay, a wet patch that never dries deserves suspicion, especially over the route of the supply pipe from the boundary.
How we actually find it
Thermal imaging. A thermal camera shows the temperature pattern across a floor or wall. A heating leak under screed shows as a warm plume, a cold mains leak as a cold anomaly. The camera reads surface temperature rather than seeing through concrete, so we use it alongside the other methods, but on Cambourne’s solid floors with buried heating runs it is usually where the answer starts.
Acoustic listening and correlation. Ground microphones and correlators pick up the noise a pressurised leak makes and can narrow a buried leak to a short section of pipe. It is at its best on metal pipe, which is exactly what most of Cambourne does not have, so here it is a supporting method. Where it earns its keep locally is on external runs and on confirming what thermal and tracer gas have already suggested.
Tracer gas. The pipe is isolated and drained, then charged with a hydrogen and nitrogen mix, harmless and non flammable at the concentration used. The gas escapes through the smallest defect and a detector picks it up at the surface, through screed, tiles or a driveway. On plastic pipework under solid floors, which is the standard Cambourne leak, this is the technique that settles it.
Moisture meters and hygrometers. Used to map how far the water has travelled, and afterwards to confirm the structure is drying, so you know the repair actually worked.
Isolation and pressure testing. Manifold systems have an advantage here. Because each circuit can be isolated at the manifold, disciplined valve by valve testing can prove which loop is losing water before any equipment comes out of the van.
The leaks we find most often in Cambourne
Heating pipework in ground floor screed. The classic Cambourne fault. A push fit or crimped joint weeping under the slab, found thermally and with tracer gas, then repaired through one small opening.
Underfloor heating loops. Fitted in some plots from new and in plenty of kitchen extensions since. A UFH leak shows a very clear signature on the thermal camera, which means opening one patch of screed rather than the room.
Shower trays and wet rooms in 20 to 25 year old bathrooms. The first Great Cambourne and Lower Cambourne bathrooms, occupied from 1999 onwards, are past their design life. A good share of the calls that come in as pipe leaks are sealing failures, water getting past a tray edge or a failed waste seal. No amount of pipe testing finds those, so we test the tray and enclosure separately and tell you plainly which it is.
Concealed valves and push fit joints behind boxing and tiling. Anything buried during a refit without an access panel.
External supply pipes. The private pipe from the boundary into the house is the homeowner’s responsibility, not Cambridge Water’s, which surprises most people. Cambourne’s supply pipes are modern plastic rather than old lead, but they still get damaged, especially where driveways have been relaid or extensions built over the run.
Where the job varies across the town
Great Cambourne and Lower Cambourne, CB23 5. The original phase, built from 1998 and 1999 onwards. The oldest pipework and bathrooms in the town, so this is where screed leaks and failed shower seals cluster. Streets like Jeavons Lane, Greenhaze Lane and Monkfield Lane are typical of it.
Upper Cambourne, CB23 6. Broadly 2008 to 2018 builds. Newer, but the same solid floor and plastic pipe construction, and hot water pipework here has still had well over a decade of very hard water through it.
Cambourne West: Sheepfold, Swansley Park and Woodfield. The newest neighbourhoods, still being built out. Leaks in houses this new are usually installation defects rather than age, a joint not made properly or a nail through a pipe, and if the property is still inside the builder’s defect period that is worth raising with the developer before paying anyone, including us.
Lamb Drove and the SuDS streets. Parts of Cambourne drain through permeable paving, swales and basins rather than conventional gullies. Water appearing where it should not is not always a supply leak, and we say so when the evidence points at surface water rather than a pipe.
One more local point in your favour. There is a single listed building in the whole parish, Great Common Farmhouse in Upper Cambourne, so heritage constraints almost never complicate access or repairs here. Estate covenants are the thing to check instead.
Insurance, trace and access, and what to do first
Many buildings insurance policies include trace and access cover, which is the cost of finding the leak and reinstating whatever had to be opened to reach it, separate from the pipe repair itself. Policies differ and we are not going to tell you what yours covers. Have a look at your schedule for trace and access, and check with your insurer before committing to work. What we provide is the written report your insurer asks for, with findings, thermal images and the location of the fault.
If it’s escaping right now, get the stopcock off and call us straight away. If it is a heating leak, switch the boiler off and stop topping up the pressure, because every top up is more water going into your floor.
What it costs
A detection visit is priced as a job, not by the hour, so you know what you are committing to before we arrive. What moves the price is the size of the property, which system is suspected and whether the leak is internal or on a buried external run. Repairs are quoted separately once we know what we are repairing, because any repair price given before that would be invented. If it turns out to be a sealing failure rather than a leak, we tell you that rather than chasing pipework you do not need chased.
Trusted & Accredited Professionals
Related work in Cambourne
Finding it is the start. We repair buried heating pipework and underfloor heating circuits, renew damaged supply pipes, and rebuild shower trays and tanking where the fault is a seal. Where the boiler itself is the casualty, see boiler installation in Cambourne. Where the water is coming from a drain rather than a supply, drainage services in Cambourne covers CCTV surveys. A system that has been leaking and topped up for months is usually full of fresh water and corrosion, and power flushing in Cambourne deals with that. For general repairs, general plumbing in Cambourne.
Why choose Vantage
We are plumbers and heating engineers who do leak detection, not a detection firm that has to hand the repair to somebody else. One visit can often locate and fix. Gas Safe registered under 956889. Covering Hertfordshire, Bedfordshire and Cambridgeshire from Stevenage. Written reports suitable for insurers. Genuine 24 hour cover, 365 days a year. A 12 month guarantee on our workmanship. Electrical work is carried out by qualified electricians and certificated as part of the job.
Areas we cover for leak detection around Cambourne
Great Cambourne, Lower Cambourne, Upper Cambourne, Cambourne West, Bourn, Caxton, Elsworth, Knapwell, Boxworth, Papworth Everard, Hardwick, Highfields Caldecote, Comberton, Toft and Bar Hill, throughout CB23.
Frequently asked questions
Will you have to dig up my floor to find the leak? No. Thermal imaging, acoustic tracing and tracer gas locate the fault before anything is opened. If the repair then needs access, it is one small, targeted opening in a known spot, not exploratory holes.
My house is only a few years old. Can it really have a leak? Yes. In the newer Cambourne West plots the usual cause is an installation defect, a joint not made off properly or a fixing through a pipe, rather than age. If the house is still within the builder’s defect period, raise it with the developer first.
Why is finding a leak harder in a new build than an old house? Plastic pipework carries sound poorly, so listening equipment alone often cannot place the fault, and manifold systems mean pipes rarely run where you would guess. Tracer gas and thermal imaging do the heavy lifting here.
Whose responsibility is the pipe between the street and my house? Yours. Cambridge Water maintains the network up to the property boundary, and the supply pipe from the boundary into the house belongs to the homeowner, repairs included.
Will my insurance cover the cost? That is between you and your insurer, and policies differ. Look for trace and access cover in your schedule and speak to them before work starts. We supply the written report and thermal images they typically ask for.
How long does a detection visit take? Most Cambourne visits take two to four hours. Solid floors throughout and plastic pipework mean we cross check thermal, tracer gas and isolation testing rather than relying on one method, and that thoroughness is what keeps the eventual opening small.
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
Suspect a leak in your Cambourne home?
Call 01462 506374. We will find it without taking the house apart, and we can repair it once we have.
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