Leak Detection Lewisham
Hidden water leaks in Lewisham pinpointed without opening floors or walls: acoustic, thermal imaging and tracer gas detection with no find, no fee, covering Lewisham, Catford, Deptford, Forest Hill and Blackheath.
No find, no fee
The detection fee is payable once we locate the source, including when it turns out to be next door.
All of Lewisham
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 Lewisham properties leak
Lewisham housing is dominated by Victorian and Edwardian terraces with period conversions. Back-addition kitchens and bathrooms in Victorian terraces concentrate pipework in one damp-prone corner, a frequent hidden-leak hotspot.
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 Lewisham
- 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 Lewisham
Back-Addition Pipe Corrosion
In Lewisham's Victorian and Edwardian terraces, the back-addition extensions housing kitchens and bathrooms concentrate all pipework in a single, often poorly ventilated corner. This area is particularly damp-prone, accelerating corrosion in older iron or lead pipes and creating a predictable hotspot for hidden leaks that can damage foundations and joists.
Concealed Leaks Under Floorboards
Period conversions often involve pipework being routed under original floorboards in these terraced properties. Leaks from corroded joints or pinholed pipes in the back-addition zone can travel along joists, remaining hidden while causing gradual structural damp and rot that insurers require documented evidence of before approving remedial work.
Shared Waste Pipe Failures
Conversions in these properties frequently tie new bathroom and kitchen waste into original, often undersized, clay or cast-iron stacks. Blockages and leaks at these junctions are common, causing water damage that can affect multiple floors. Precise trace and access is needed to identify the exact failure point for insurer validation.
Pressure Stress on Old Joints
Modern appliances installed in period back-additions place new pressure demands on original plumbing systems. The constant stress cycles can fatigue old solder joints and lead wool seals concentrated in that damp corner, leading to slow leaks. Our engineers document the systemic cause to support your insurance claim for both the leak and access damage.
How claims run here
Repeating failures in Lewisham's uniform Edwardian terraces
What we detect
Leak detection services in Lewisham
Areas we cover in Lewisham
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Where we work
Lewisham coverage map
Map data © OpenStreetMap contributors.
How to Choose a Leak Detection Company in London
Choosing between companies you cannot assess technically is the hard part of a hidden leak. Six questions separate a survey from a guess, and the answers tell you more about the outcome than any review ever will.
Leak detection in Lewisham, FAQs
How quickly can you attend a leak in Lewisham?
Same-day appointments are usually available in Lewisham, 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, where the leak is inside your own property. Attend a confirmed live leak in Lewisham, fail to locate it, and the detection fee is waived. The promise stops at your boundary: if the survey shows the water is arriving from an adjoining property, a communal pipe or the supplier's main, that leak has been found and the visit is charged.
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 Lewisham detection visit, typically within 48 hours. They are structured the way UK loss adjusters expect.
Which parts of Lewisham do you cover?
All of it, including Lewisham, Catford, Deptford, Forest Hill, Blackheath. We cover every London borough, so coverage never depends on which side of a postcode line you live.
Water is coming in where the back addition meets the main house. What causes that?
That junction is the most common failure point in Lewisham's terraced stock and it has two quite different explanations. A defect in the valley gutter, flashing or parapet lets rainwater in, which is an envelope problem and may fall under storm damage with its own conditions, or may be maintenance and therefore excluded. A failed waste or supply run serving the bathroom above is an escape of water and is dealt with differently. The distinguishing evidence is timing: whether the wetting tracks rainfall or tracks use of the plumbing above.
My neighbour had the same problem last year. Does that help my claim?
It is useful context for diagnosis and largely irrelevant to entitlement. An insurer assesses your loss on your policy and your facts, not on what happened next door. Where it does help is in the investigation, because knowing that an identical construction detail has failed in identical houses nearby narrows the search considerably and makes the eventual finding more persuasive. Where it can hurt is if a known and recurring defect was left unaddressed, since insurers are entitled to expect reasonable maintenance of a building.
The house was converted into two flats. Whose insurance deals with it?
That turns on how the conversion was set up. Where one party holds the freehold and grants leases, a single buildings policy arranged by the freeholder usually covers the whole structure. Where the two flats each own a share of the freehold, the jointly owned company insures. In a minority of conversions each flat is separately insured, which is the awkward case, because water crossing between them involves two insurers and neither has the whole building. Check the freehold title and the leases rather than assuming the arrangement matches the neighbours'.
What counts as reasonable maintenance for insurance purposes?
Broadly, keeping the building in a sound condition and dealing with defects you know about or ought reasonably to have noticed. Policies commonly exclude damage arising from wear, gradual deterioration or lack of maintenance, and a valley gutter that has been failing visibly for years is the kind of thing an insurer will raise. It does not require perfection or professional inspection. What helps is evidence that you responded to symptoms when they appeared, which is another reason to keep dated records of reports, quotes and remedial work even when it seemed minor.
Can you tell whether the water is from the roof or from a pipe?
Usually, and it is often the most valuable single conclusion in a Lewisham claim. The tests are practical: whether wetting continues during a dry spell, whether it responds to isolating the supply, whether the moisture profile suggests a point source or a diffuse entry along a junction, and whether the water shows characteristics of a treated supply. A report that sets out those observations and the inference drawn from them gives the adjuster a basis to classify the loss, which is the step that everything else in the claim depends on.
The valley gutter is shared with next door. Who repairs it?
In a terrace the valley or parapet gutter frequently straddles the boundary between two houses, and both owners have an interest in it. Where the deeds are silent, repairs to a shared element are usually a matter for agreement between the neighbours, with each contributing to work that benefits both. Party wall legislation may apply where work affects the structure at the boundary. Because Lewisham's terraces were built as continuous runs, this comes up repeatedly, and it is far easier to resolve when someone has established which side the defect actually sits on.
I bought recently and the survey mentioned damp at the rear. Does that help or hurt a claim?
Then you have a dated professional observation predating your ownership, which cuts both ways. It is useful evidence that the condition existed and may support a claim against a seller or a surveyor depending on what was said and what was done. It is also material an insurer may point to when arguing that a defect was known about and not addressed. The sensible response is to act on it promptly and document that you did, since the difference between a known defect acted upon and one ignored is what most exclusions turn on.
Read before you book
Leak detection guides
How to Choose a Leak Detection Company in London
Choosing between companies you cannot assess technically is the hard part of a hidden leak. Six questions separate a survey from a guess, and the answers tell you more about the outcome than any review ever will.
ReadThe Real Cost of Cheap Leak Detection in London for Insurance Claims
Opting for cheap leak detection in London can jeopardise your insurance claim. We detail the procedural requirements insurers have for trace & access to ensure your costs are recovered.
ReadNo Find, No Fee Leak Detection: How the Model Really Works
No find, no fee is a pricing decision, not a technical one. What the model covers, what counts as a find, what happens on the attendances where nothing is located, and the specific terms worth reading before you agree to it.
ReadA Step-by-Step Guide to Your Trace and Access Insurance Claim
Trace and access claims are won or lost on sequence. This is the order the work has to run in, from the first hour through notification, authority, survey and opening-up, with the evidence checklist an insurer expects at each stage.
ReadHow to Spot the Signs of a Hidden Water Leak in Your Home
Identifying the hidden signs of a water leak is crucial for meeting insurer trace & access requirements and protecting your property.
ReadHow Non-Invasive Leak Detection Works on an Insurance Claim
Non-invasive is a claims term as much as a technical one. Which methods genuinely read through the fabric, which ones need a hole first, why the distinction decides how much of a claim is spent on searching rather than repairing, and how the method chosen shapes the evidence.
ReadLeak detection across London
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