Leak Detection Merton
Hidden water leaks in Merton pinpointed without opening floors or walls — acoustic, thermal imaging and tracer gas detection with no find, no fee, covering Wimbledon, Mitcham, Morden, Raynes Park and Colliers Wood.
No find, no fee
You only pay the detection fee if we locate the leak.
All of Merton
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 Merton properties leak
Merton housing is dominated by Edwardian semis, interwar terraces and mansion flats. Underfloor heating retrofits in extended Edwardian semis are a growing source of screed leaks — thermal imaging maps the loop before repair.
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 Merton
- 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 Merton
Underfloor Heating Screed Leaks
Many Edwardian semis in Merton have been retrofitted with underfloor heating systems during rear extensions. The screed layer can crack over time, leading to leaks within the floor construction that are invisible from above. Thermal imaging is essential to non-invasively map the exact layout of the heating loops and pinpoint the leak location before any repair work begins.
Aged Lead & Iron Supply Pipes
The borough's Edwardian and interwar housing stock often retains original or very old main water supply lines. These lead or iron pipes are prone to pinhole leaks and general decay. Acoustic listening equipment allows our engineers to trace the pipe run and detect the precise sound of a pressurised leak, even through walls or under floors.
Mansion Flat Central Heating Corrosion
The larger, complex heating systems serving mansion flats suffer from systemic corrosion and scale buildup over decades. This leads to pinhole leaks in iron pipework, often concealed within walls or under floors. Tracer gas testing is highly effective in these pressurised systems to locate leaks without invasive dismantling of common areas.
Grounded Drainage in Terraces
Interwar terraces share drainage runs that can settle or fracture due to ground movement. This causes slow leaks that saturate the subsoil, potentially undermining foundations. Moisture mapping with advanced sensors helps delineate the exact extent of saturation from a compromised drain, separating it from general ground moisture.
From the forums
What Merton homeowners report about hidden leaks
What we detect
Leak detection services in Merton
Leak Detection
Technology-Driven Diagnostics
Acoustic Detection
Precision Underground Diagnostics
Thermal Imaging
Non-Invasive Thermal Diagnostics
Tracer Gas
Concealed Pipe Detection
Underground Leaks
Subsurface Leak Forensics
Heating Leaks
Thermographic Diagnostics
UFH Leaks
Technology-Driven Detection
Trace & Access
Precision Leak Location
Leak Repair
Precision Leak Investigation
Areas we cover in Merton
Also need an emergency plumber rather than detection? Emergency Plumber Merton →
Where we work
Merton coverage map
Map data © OpenStreetMap contributors.
How to Choose a Leak Detection Company in London: A Guide to Technology & Precision
Selecting a leak detection company requires evaluating their technology, methodology, and commercial sector expertise. Here's what to prioritise.
Leak detection in Merton — FAQs
How quickly can you attend a leak in Merton?
Same-day appointments are usually available in Merton, 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. Every detection visit in Merton is covered by our no find, no fee promise: if we attend a confirmed live leak and cannot locate it, the detection fee is waived.
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 Merton detection visit, typically within 48 hours. They are structured the way UK loss adjusters expect.
Which parts of Merton do you cover?
All of it — including Wimbledon, Mitcham, Morden, Raynes Park, Colliers Wood. We cover every London borough, so coverage never depends on which side of a postcode line you live.
Can you find a leak in underfloor heating without lifting the screed in my Wimbledon home?
Often yes. Thermal imaging can trace the warm path of buried UFH loops and highlight where a leak cools or floods the surrounding screed, and pressure testing isolates which circuit is losing water. This narrows the search to a small area rather than opening a whole floor. In older Merton properties with retrofitted UFH, that targeted approach usually avoids widespread disruption.
My Mitcham terrace boiler keeps losing pressure but I cannot see any water. What could it be?
Pressure loss does not always mean a visible leak. Common causes include a failing expansion vessel, a weeping pressure-relief valve discharging outside, or a small leak under screed or floorboards. A leak-detection visit checks these methodically before any floors come up. Our typical fixed investigation fee is in the £250 to £450 range, following standard UK trade cost-guide ranges.
Read before you book
Leak detection guides
How to Choose a Leak Detection Company in London: A Guide to Technology & Precision
Selecting a leak detection company requires evaluating their technology, methodology, and commercial sector expertise. Here's what to prioritise.
ReadNo Find, No Fee Leak Detection Explained: How Advanced Technology Guarantees Precision
Our 'no find, no fee' policy is underpinned by advanced, non-invasive detection technology, providing landlords and commercial property managers with a precise, risk-free solution for locating hidden water leaks.
ReadA Step-by-Step Guide to Trace and Access Insurance Claims
A technical guide detailing the systematic process for trace and access insurance claims, from initial leak detection to final reinstatement, for property owners and managers.
ReadIdentifying the Signs of a Hidden Water Leak in Your Property
We detail the subtle, technical signs that indicate a hidden water leak, from unexplained meter activity to thermal imaging anomalies, crucial for property integrity.
ReadHow Leak Detection Works: The Methods Explained for Landlords & Commercial Properties
We explain the core technical methods—acoustic, thermal, tracer gas, and endoscopic inspection—used by our engineers to locate hidden water leaks with minimal disruption.
ReadLeak detection across London
Losing water in Merton?
Tell us the symptoms and your postcode. Fixed detection fee, agreed arrival window, no find no fee — confirmed before you book.
Book a detection visit