Will you need to open my walls?

Only after the leak is precisely located using thermal imaging or tracer gas — minimising the access needed.

Do you provide insurance reports?

Yes. Reports are prepared to the standard insurers require and typically delivered within 24 hours.

Leak Detection — London & Surrey

Leak Detection: Find the Leak First, Open Up Once

A stained ceiling, a warm patch on the floor, a boiler that keeps losing pressure, a water bill that’s crept up. Whatever the symptom, the job is the same: locate the leak precisely, prove it with evidence, and open up in one place — not five. We start with non-invasive checks where suitable. If access is needed, we explain why and agree the next step. Fully insured and qualified damp, mould and leak specialists.

📞 0800 054 1524
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Every kind of leak, one investigation team

Corroded pipe on a steel beam — confirmed as the leak source during a DML investigation.

Plumbing & hidden pipe leaks

Hot and cold supply pipes under floors, in walls and boxed-in runs — located without ripping the room apart.

Central heating leaks

Heating circuits lose pressure through pinholes you’ll never see. Thermal imaging and tracer gas find them. See central heating leaks.

Boiler losing pressure

If the boiler checks out but pressure keeps dropping, the water is going somewhere. Why boilers lose pressure.

Ceiling leaks

Stains that dry up and come back, drips from light fittings, leaks from the flat above — traced to the actual source, not the wet patch.

Under floors & behind walls

Screeded floors, tiled bathrooms and finished walls investigated with moisture mapping, acoustics and tracer gas before anything is opened.

Water mains & supply pipes

External mains under drives and gardens, and the private supply pipe you’re responsible for. See water mains & supply pipe investigation.

Waste & drainage leaks

Leaking waste pipes and defective drains feed damp into the building for years. CCTV drainage surveys put the cause on camera.

Roof leaks & water ingress

Not every wet ceiling is plumbing. We separate roof leaks and water ingress from pipe leaks with evidence.

Damp & mould after leaks

Long-running leaks leave saturated walls and mould behind. We assess it in the same visit — damp surveys and mould inspections.

How we find leaks without damage

Thermal imaging, acoustic listening, tracer gas, moisture mapping and CCTV — matched to the pipe, the surface and the symptom. Full plain-English explainer: how we find hidden leaks without damage. We won’t promise zero disruption — no honest company can — but locating first means one targeted access point instead of exploratory holes.

How we pinpoint hidden leaks — the four non-invasive methods we combine on site. (illustrative diagram)

Trace & access and your insurance

Many buildings policies include trace-and-access cover for the cost of finding a hidden leak and reaching it. Our reports are insurance-ready: cause, location, method, readings and photographs — evidence prepared for your insurer or loss adjuster. Read does insurance cover trace & access? or go to trace & access and insurance reports. For complex or disputed claims see water leak investigations.

What happens on site

History first — what you’ve seen, when it started, what’s been tried.
Non-invasive survey with the methods above, matched to your property.
We show you the evidence and explain where the leak is and why we’re confident.
If access is needed to confirm or repair, we explain why and agree the next step before anything is opened.

After the leak is found

You get the location, the cause and the evidence — readings, thermal images and photographs — plus repair and reinstatement recommendations. Repairs and any follow-on works are quoted based on the job. Need it urgently? We offer emergency leak attendance across London & Surrey.

Active drip located in a ceiling void during a DML leak detection visit.

A note on “no find no fee”

We don’t offer no-find-no-fee visits. You pay for the investigation, the evidence and professional attendance — and you get a documented answer either way. That’s what makes the report worth something to you and your insurer.

Leak detection FAQs

How quickly can you attend?

Call 0800 054 1524 for an honest window for your postcode — active leaks causing damage are prioritised as emergencies.

What does it cost?

Investigations are scoped to the job — see what leak detection costs — and your price is confirmed before we attend. Repairs are quoted based on the job.

Can you fix the leak as well as find it?

Yes — our own engineers handle repairs, or you’re free to use the report with any contractor. No obligation either way.

Will my insurance cover the investigation?

Many buildings policies include trace-and-access cover. We can’t promise what any insurer will pay — but our reports are prepared to support the claim process properly.

Book leak detection

📞 Call free: 0800 054 1524
💬 WhatsApp: 07733 019492
Or send the form below. London & Surrey.