How do you find a hidden water leak without digging up floors?

We use specialist non-destructive equipment including acoustic listening devices, thermal imaging cameras and moisture meters. These allow us to pinpoint the source of a hidden leak behind walls, under floors or beneath concrete without unnecessary damage to your property. We only open up the area we need to access once the leak location is confirmed.

What are the signs I might have a hidden leak?

Common signs include unexplained increases in your water bill, damp patches on walls or ceilings, the sound of running water when everything is turned off, or a drop in water pressure that has no obvious cause. Mould or musty smells in a room can also indicate a slow, ongoing leak. If you notice any of these, it's worth calling us for an inspection.

Can a small leak cause serious damage if left?

Yes. Even a slow drip can cause significant structural damage over time, including rot, mould, compromised plasterwork and, in the worst cases, weakened joists or flooring. The sooner a leak is identified and repaired the less damage it causes and the lower the cost of putting things right.

Do you repair the leak as well as detect it?

Yes. We locate the leak, carry out the repair, and then test to confirm the leak has been fully resolved before we leave. You won't need to organise a separate plumber to fix what we find.

Will my insurer accept a leak detection report?

Most insurers will accept a written report from a qualified plumber detailing the location, cause and repair of a leak. We can provide full documentation of the detection and repair work carried out, which can support a claim for any resulting damage. We recommend contacting your insurer before work begins if you plan to claim.

Leak Detection in Sunbury-on-Thames

Accurate, non-destructive leak detection in Sunbury-on-Thames — we trace hidden leaks quickly to save you time, water and money.

5.0 · 73 verified reviews

Clear & Upfront Pricing
24/7 Callouts, 365 Days A Year
Trusted Local Business
Gas Safe Registered Installers
£5,000,000 Public Liability Insurance

01932 556225

Sunbury Plumbers engineer using leak detection equipment in Sunbury-on-Thames

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Accurate Leak Detection in Sunbury-on-Thames

Hidden water leaks can cause serious damage long before you spot them — damp patches, peeling paint, a musty smell, unexplained rises in your water bill, or a boiler that keeps losing pressure. Sunbury Plumbers specialise in tracing leaks quickly and accurately across Sunbury-on-Thames and the surrounding TW16, TW15, TW17, TW13, TW14, TW18, KT12 and KT8 areas, so the problem can be fixed before it gets worse.

Finding the exact source of a leak takes experience and the right approach. Rather than tearing up floors and walls on guesswork, we use careful, non-invasive methods to locate the leak precisely. That means less mess, less disruption to your home and a repair that's targeted where it's actually needed — which usually keeps costs down too.

Leak detection in Sunbury-on-Thames is often needed in homes with hidden pipework, fitted kitchens or timber floors, and hard water can make small drips show up as stubborn staining and damage.

Whether the leak is on a heating pipe, a concealed supply pipe or beneath a bathroom floor, our Gas Safe registered engineers will find it and put it right. We'll keep you informed throughout and make sure everything is watertight before we leave. For leaks that can't wait, we're available 24/7.

Call 01932 556225

Sunbury Plumbers engineer using a thermal imaging camera for leak detection in Sunbury-on-Thames

Our Leak Detection Process

Report the signs
Damp patches, rising water bills, low pressure or the sound of running water — tell us what you’ve noticed.
Non-invasive investigation
We trace the leak accurately, minimising disruption and avoiding unnecessary damage to floors and walls.
Pinpoint the source
We confirm exactly where the leak is coming from so the repair can be targeted and cost-effective.
Repair & reassure
We carry out the repair and check the system is watertight, keeping you informed at every stage.

Leak detection problems we fix in Sunbury

If you need a plumber in Sunbury for a leak that will not show itself, we can trace it without tearing up the whole house. From riverside homes in TW16 to newer estates near the Thames, our leak finding work is built around careful diagnosis and a clean repair plan.

Hidden Floor Leak

A hidden leak under the floor often shows up as soft boards, a musty smell, or a patch that never quite dries out. We use moisture readings, pressure checks and targeted leak detection to find the source before any boards are lifted.

Meter Still Running

If the water meter is still running when all taps are off, there is usually a leak on the supply side or within the internal pipework. Our engineer isolates sections of the system, checks for pressure loss, and narrows down the fault so the repair is focused and efficient.

Damp Wall Patches

Damp patches on walls can come from a slow pipe leak, a failed joint, or water tracking along hidden pipework inside the fabric of the house. We test likely routes, inspect nearby fittings, and identify whether the problem is plumbing related or caused by another source.

Ceiling Leak Repairs

A leak through the ceiling is often caused by pipework in an upstairs bathroom, heating circuit, or a poor connection in the floor above. We trace the route of the water, confirm the source, and give clear advice on the next repair so the damage does not spread.

Thermal Leak Tracing

Thermal imaging and acoustic leak detection help us find leaks that are buried behind walls, under floors, or inside plastered runs without guesswork. These tools let us spot temperature changes and listen for escaping water, which is especially useful in interwar semis and tight refurbishments around Sunbury, Ashford and Shepperton.

Mains Pipe Leak

A mains supply pipe leak can waste a lot of water quickly, especially if the pipe runs under a drive, garden or path. We check the incoming supply, carry out pressure testing and locate the break so the damaged section can be repaired with the least disruption possible.

Expert Advice

“Leaks can be awkward in Sunbury-on-Thames homes because many properties have had layers of pipework added over the years. I look for the source carefully, using a methodical approach that limits damage and gives the customer a clear explanation of what is happening.”

AaronPlumbing & Drainage Engineer15 years’ experience

Frequently Asked Questions

: We use specialist non-destructive equipment including acoustic listening devices, thermal imaging cameras and moisture meters. These allow us to pinpoint the source of a hidden leak behind walls, under floors or beneath concrete without unnecessary damage to your property. We only open up the area we need to access once the leak location is confirmed.
: Common signs include unexplained increases in your water bill, damp patches on walls or ceilings, the sound of running water when everything is turned off, or a drop in water pressure that has no obvious cause. Mould or musty smells in a room can also indicate a slow, ongoing leak. If you notice any of these, it's worth calling us for an inspection.
: Yes. Even a slow drip can cause significant structural damage over time, including rot, mould, compromised plasterwork and, in the worst cases, weakened joists or flooring. The sooner a leak is identified and repaired the less damage it causes and the lower the cost of putting things right.
: Yes. We locate the leak, carry out the repair, and then test to confirm the leak has been fully resolved before we leave. You won't need to organise a separate plumber to fix what we find.
: Most insurers will accept a written report from a qualified plumber detailing the location, cause and repair of a leak. We can provide full documentation of the detection and repair work carried out, which can support a claim for any resulting damage. We recommend contacting your insurer before work begins if you plan to claim.