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Lewisham, London
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
You only pay the detection fee if we locate the leak.
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.
What fails here
Common leak problems in Lewisham
01
Back-addition pipework leaks in Victorian terraces
Lewisham's Victorian and Edwardian terraces almost all carry a rear back-addition holding the kitchen and bathroom, which concentrates supply pipes, waste runs and heating flow-and-return in one narrow corner. When a joint weeps behind the units or under the boarded floor, the water tracks along the party wall and shows as damp two rooms away. We moisture-map that corner and use acoustic and thermal tracing to find the true source before anything is opened up.
02
Shared supplies feeding split period conversions
Many terraces across the borough are split into two or three flats served by one original rising main and shared waste stacks. A leak on the top-floor supply often surfaces in the ground-floor ceiling, and neither leaseholder can tell whose pipe is at fault. We trace the shared supply run non-invasively, isolate each branch by pressure testing, and confirm ownership so the right party and the right insurer are involved from the start.
03
Concealed heating leaks under solid and screeded floors
Refurbished kitchens and rear extensions frequently bury heating pipes and manifolds in screed or under engineered flooring. A slow drop in boiler pressure with no visible puddle usually means a buried joint or a nicked pipe under the screed. We thermal-image the floor to map warm loss, then confirm with tracer gas so the leak is pinpointed to a small area rather than lifting an entire new floor.
04
Rainwater and drainage defects mistaken for plumbing leaks
On older Lewisham stock, blocked or cracked below-ground drains, failed rear gullies and defective flat-roof outlets over back additions push water into walls that reads exactly like an internal plumbing leak. Getting this wrong means chasing the wrong pipe for weeks. We separate rainwater and drainage faults from pressurised supply leaks using dye testing, CCTV where needed and moisture profiling, so the report names the real defect.
From the forums
Leak Detection Across Lewisham's Terraces and Conversions
Across Lewisham, from the Corbett Estate's Edwardian terraces to Forest Hill's hillside villas and Deptford's warehouse conversions, locals on Reddit's r/HousingUK and r/DIYUK, MoneySavingExpert and neighbourhood forums tend to raise the same themes. Back-addition pipework, where the rear kitchen or bathroom meets the main house, is a common spot for slow leaks that show up as staining on the corner where two rooves or walls join. In flat conversions, people describe confusion over shared supplies and who pays when a leak sits between two homes. On the hills around Forest Hill and Honor Oak, there is regular debate about whether damp is a genuine plumbing leak or ground and rising moisture. The general advice is to locate the source before opening walls.
What we detect
Leak detection services in Lewisham
Leak Detection
No find, no fee
Acoustic Detection
Listen. Locate. Repair.
Thermal Imaging
See through floors and walls
Tracer Gas
For the leaks nothing else finds
Underground Leaks
Locate before you excavate
Heating Leaks
Boiler pressure dropping? There’s a reason.
UFH Leaks
One tile up, not the whole floor
Trace & Access
Insurer-ready from the first visit
Leak Repair
Found. Fixed. Retested.
Areas we cover in Lewisham
Also need an emergency plumber rather than detection? Emergency Plumber Lewisham →
Where we work
Lewisham coverage map
Map data © OpenStreetMap contributors.
Don’t get caught out
How to Choose a Leak Detection Company in London (Without Getting Burned)
A plain-English buyer's guide to hiring a leak detection firm in London: why cheap hourly rates backfire, what real equipment looks like, how to read no-find-no-fee small print, and who is actually responsible for the pipe.
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. Every detection visit in Lewisham 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 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.
My Forest Hill house has damp on a hillside wall. Is it a leak or the ground?
Hillside properties around Forest Hill and Honor Oak can show damp from ground moisture as well as from plumbing, so the two are easy to confuse. Non-invasive tracing, using moisture readings, thermal imaging and acoustic checks, helps establish whether a pressurised pipe is losing water before any wall is opened. A typical fixed-fee investigation runs in the usual UK trade cost-guide range of around 250 to 450 pounds.
There's a leak between two flats in a Lewisham conversion. Who is responsible?
In converted flats around Deptford and central Lewisham, shared or ambiguous supply runs make it hard to know which home a leak sits in. Locating the exact source first gives both parties clear evidence, which usually helps resolve who pays under the lease or between insurers. We focus on finding and confirming the source; responsibility itself depends on your lease terms and any freeholder or managing agent arrangements.
Read before you book
Leak detection guides
Leak Detection · 11 min read
How to Choose a Leak Detection Company in London (Without Getting Burned)
A plain-English buyer's guide to hiring a leak detection firm in London: why cheap hourly rates backfire, what real equipment looks like, how to read no-find-no-fee small print, and who is actually responsible for the pipe.
ReadPricing · 11 min read
The Real Cost of Cheap Leak Detection in London: A Buyer-Beware Guide
A low headline price for leak detection can end up the most expensive route of all. Here is how hourly billing, single-method surveys and non-compliant reports quietly inflate your final bill, and how to compare fairly.
ReadLeak Detection · 11 min read
No Find, No Fee Leak Detection: What It Really Means (and the Small Print to Check)
No find, no fee sounds like a safe bet, but the phrase means very different things depending on who you book. Here is how a genuine guarantee works, the carve-outs that quietly reintroduce charges, and the questions that protect you before anyone turns up.
ReadInsurance · 11 min read
Trace and Access Insurance Claims: A Step-by-Step Guide (2026)
Trace and access cover pays to find a hidden leak and put your property back together, but only under specific conditions. Here is how the cover works, what voids it, and how to run a claim from first notification to reinstatement.
ReadLeak Detection · 11 min read
10 Signs of a Hidden Water Leak at Home (and What to Do About Each)
A hidden leak rarely announces itself with a burst pipe. It shows up as a creeping bill, a warm patch on the floor, a musty smell you cannot place. Here are the ten signs worth taking seriously, what each one usually means, and the first sensible check to make before anything gets torn up.
ReadLeak Detection · 11 min read
How Leak Detection Actually Works: The Methods Explained
Acoustic, thermal, tracer gas, moisture mapping and pressure testing each find a different kind of leak. Here is what every method is genuinely good and bad at, why one tool on its own misses so much, and how a real survey moves from a damp patch to a marked repair point.
ReadLeak detection across London
Losing water in Lewisham?
Tell us the symptoms and your postcode. Fixed detection fee, agreed arrival window, no find no fee — confirmed before you book.
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