Leak Detection City of London
Hidden water leaks in City of London pinpointed without opening floors or walls: acoustic, thermal imaging and tracer gas detection with no find, no fee, covering Barbican, Bank, Moorgate and Aldgate.
No find, no fee
Applies to leaks starting in your own property; pinpointing a neighbour's counts as a find.
All of City of London
Same-day and next-day cover across the whole borough.
Insurer-ready reports
Trace & access documentation loss adjusters accept.
Multi-method survey
Acoustic, thermal, tracer gas and moisture on every visit.
Local knowledge
How City of London properties leak
City of London housing is dominated by the Barbican estate and commercial buildings with residential conversions. Concrete-frame buildings like the Barbican channel water along slab soffits, so the visible drip is rarely above the actual failed pipe.
Knowing the local building stock matters: it tells us where the pipework usually runs, which materials to expect, and which detection method will get to the answer fastest, before we arrive.
Covered in City of London
- Hidden leaks under floors and in walls
- Underground supply pipe leaks
- Central heating and boiler pressure loss
- Underfloor heating loop leaks
- Flat-to-flat leak origin investigations
- Trace & access reports for insurance claims
Three methods, one marked point
Acoustic survey
Ground microphones and correlators follow the sound of escaping water through floors and ground.
Thermal imaging
Infrared cameras reveal wet patches and buried heating runs through the floor surface.
Tracer gas
A safe hydrogen mix escapes through the exact failure point and rises to our surface detector.
Common leak problems in City of London
Concrete soffit leak tracking
Water from a failed pipe in a concrete-frame building like the Barbican often channels along the slab soffit before dripping down, meaning the visible leak is far from the actual source. This makes tracing the origin complex without specialised equipment. Our engineers use acoustic and thermal imaging to pinpoint the breach, preventing unnecessary demolition.
Residential conversion pipework
Many residential units in the City are conversions of older commercial buildings, where plumbing systems were not originally designed for 24/7 domestic use. Aging pipework and increased pressure from modern appliances can lead to sudden joint failures and leaks. We respond quickly to isolate the supply and assess the system's integrity.
High-pressure system failures
Taller buildings and complex multi-level estates in the City often require high-pressure water systems. These systems are prone to pinhole leaks in pipes or failures at pressure-reducing valves, which can escalate rapidly. Immediate isolation of the affected zone is critical to prevent widespread water damage.
Concealed pipework diagnostics
In concrete and steel-frame constructions, much of the plumbing is embedded within floors and walls. A small leak can cause significant internal damage long before it becomes visible. We use non-invasive moisture mapping and thermal cameras to locate hidden leaks without unnecessary structural damage.
How an out-of-hours call runs here
The Square Mile's housing is small, managed and awake
What we detect
Leak detection services in City of London
Leak Detection
24/7 Emergency Detection
Acoustic Detection
Fast Leak Detection
Thermal Imaging
Non-Invasive Leak Detection
Tracer Gas
24/7 Emergency Response
Underground Leaks
Emergency Underground Detection
Heating Leaks
Emergency Heating Leaks
UFH Leaks
24/7 Emergency Response
Trace & Access
Emergency Leak Detection
Leak Repair
Emergency Leak Response
Areas we cover in City of London
Also need an emergency plumber rather than detection? Emergency Plumber City of London →
Where we work
City of London coverage map
Map data © OpenStreetMap contributors.
How to Choose a Leak Detection Company in London: Speed is Everything
Choosing a leak detection company in London comes down to one critical factor: response speed. Here’s how to ensure you get immediate, 24/7 action.
Leak detection in City of London: FAQs
How quickly can you attend a leak in City of London?
Same-day appointments are usually available in City of London, and next-day almost always. If water is actively escaping, tell us when you book. Live leaks are prioritised and we can talk you through isolating the supply while an engineer travels.
Do you charge if you can’t find the leak?
No, so long as the leak is one arising inside your own property in City of London: attend, fail to locate it, and you are not charged the detection fee. It is not cover against the leak being someone else's. Where the trace ends at a neighbouring property, a communal riser or the mains before your boundary, we have located it and the visit is payable.
Can you provide a report for my insurer?
Yes, trace and access reports documenting the cause, precise origin and affected areas are available for every City of London detection visit, typically within 48 hours. They are structured the way UK loss adjusters expect.
Which parts of City of London do you cover?
All of it, including Barbican, Bank, Moorgate, Aldgate. We cover every London borough, so coverage never depends on which side of a postcode line you live.
We live on the Barbican estate and a leak is coming through from a neighbour. How does an out-of-hours visit work?
On a managed estate the sequence matters more than the speed. The estate or building office is the route to common parts and to the neighbouring flat, and an engineer working in a duct or plant area will normally need that arranged rather than assumed. What can be done without it is everything inside your own flat: close what is reachable, keep water off the lighting, and record where it is entering and when it started, which is what the estate will ask for. Keep a note of exactly which rooms show water, because on an estate the report goes into a system and vagueness slows it down.
There is a flat above a closed shop and water is running down into it. What happens overnight?
This is the awkward one, because the water is going somewhere nobody can get into. The priority is shutting the supply feeding the leak, which is in your control, rather than reaching the space below, which is not. Stop the flow, note the time it started and photograph what you can see from your side. The commercial tenant and their insurer will want that, and closing the source is the only thing that limits how bad the morning looks. If the shop below has a key holder listed on the door, photograph the number before it gets wet.
Do building rules stop work happening at night here?
They constrain it rather than stop it. Managed buildings generally have rules about noisy work, about entering plant and duct space, and about who may work in common parts, and those rules exist for good reasons. What none of them prevent is closing a valve, switching off a circuit and containing water. The work that needs a permit, a supervised entry or a scheduled slot gets booked through the building rather than improvised, once the immediate flow has been dealt with.
What will the estate or building want from us in writing afterwards?
More than a phone call, and it is easier to provide at the time than to reconstruct later. Managed buildings here typically want the date and time the leak was first noticed, where the water was entering, what was done and by whom, which valves were closed, which flats were affected and what remains outstanding. If a contractor attended, they will want the name and what was found. Keeping a short written note as the night goes on, rather than trying to remember afterwards, means the report writes itself. It also matters because on an estate the same riser or duct may serve dozens of homes, and a properly recorded incident is how a recurring fault gets identified rather than being treated as a series of unrelated inconveniences.
Read before you book
Leak detection guides
How to Choose a Leak Detection Company in London: Speed is Everything
Choosing a leak detection company in London comes down to one critical factor: response speed. Here’s how to ensure you get immediate, 24/7 action.
ReadCheap Leak Detection in London: What's the Real Cost of a Slow Response?
Opting for 'cheap' leak detection can lead to massive hidden costs from escalating damage. True value lies in immediate, 24/7 emergency response to limit destruction.
ReadNo Find, No Fee Leak Detection Explained: Your Guarantee of Results
Our 'no find, no fee' guarantee means you pay nothing if our emergency engineers can't locate your leak. It's our commitment to fast, effective results, day or night.
ReadTrace and Access Insurance Claims: Your Step-by-Step Guide
A fast, clear guide to navigating a trace and access insurance claim after a leak, detailing the immediate steps and the professional documentation required.
ReadSigns of a Hidden Water Leak at Home, and What Each One Proves
Most lists of leak symptoms tell you what to look for and stop there. The more useful question is what each sign proves on its own, because several of the classic indicators have entirely innocent explanations and two of them are nearly conclusive.
ReadHow Leak Detection Works: The Methods, What Each One Reads, and Where Each One Fails
Leak detection is not one technique. It is a sequence: prove there is a leak, work out which system it is on, then use the method that suits the pipe, the floor and the failure. Here is how each method works and what defeats it.
ReadLeak detection across London
Losing water in City of London?
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