Greater London · SW19 · SW20 · CR4 · SM4
Leak detection in Merton
Non-invasive water leak detection, repair and insurance reporting across Merton and the surrounding area. Thermal imaging, acoustic correlation and tracer gas find the source precisely — before anyone lifts a floor or opens a wall.
Covered by our South West London team.
Local knowledge
What actually leaks in Merton
Wimbledon Village and the surrounding streets hold large Victorian and Edwardian houses that have been comprehensively remodelled, frequently with basements and whole-house underfloor heating, while Mitcham and Morden are largely interwar estate housing on clay. The two halves of the borough need completely different first moves.
That is not trivia. It changes where we start. Knowing that a Merton property is likely to be on Thames Water mains, built the way most of the stock around it was built, and sitting on the ground it sits on, means we can rule out whole categories of fault before we unpack the van — which is time you are not paying for.
The faults we are called to most often here
- Whole-house underfloor heating faults in remodelled Wimbledon houses
- Basement conversion ingress and tanking failures
- Interwar supply pipework failing under solid floors in Mitcham and Morden
- Clay movement cracking drain runs
- Escape of water between flats in Raynes Park conversions
Neighbourhoods we cover in Merton
- Wimbledon
- Mitcham
- Morden
- Raynes Park
- Colliers Wood
- Wimbledon Park
Plus every street in SW19, SW20, CR4, SM4. If you are just outside, call and ask.
Services
What we do in Merton
Every service below is available across SW19, SW20, CR4, SM4, at the same published rates we charge everywhere else.
Water leak detection in Merton
The core survey: we find the exact source of any escape of water in your property without lifting floors or opening walls on a guess.
Emergency leak detection in Merton
Water coming through a ceiling does not wait for office hours. We answer the phone around the clock and target a one-hour response.
Central heating leak detection in Merton
If your boiler keeps losing pressure and you are topping it up every few days, there is a leak in the system. We find it.
Underground water leak detection in Merton
Mains supply pipe leaks under drives, gardens and roads, located to within a foot before anyone lifts a spade.
Damp and mould surveys in Merton
Establishing whether you have a leak, rising damp, penetrating damp or condensation, because the fix for each is completely different.
Trace and access reports for insurance claims in Merton
The evidence pack your insurer needs: what leaked, where, how it was proved, and what it will cost to put right.
Leak repair in Merton
Find and fix in one visit wherever possible, with the repair pressure tested and proved before we leave.
Water damage restoration and drying in Merton
The stage after the leak: drying the structure out properly, and putting right what the water damaged. Quoted separately once we know what we are dealing with.
Commercial leak detection in Merton
Offices, retail, hotels, schools, care homes and managed blocks, surveyed with minimum disruption to trading.
Equipment
How we survey a property in Merton
Every van carries the full range. Which instrument leads depends on the pipe, the pressure and the ground it is buried in.
Thermal imaging camera survey
A radiometric camera reads surface temperature through plaster, screed and tile to reveal the cold plume of an escaping supply pipe or the warm track of a heating leak.
Acoustic leak correlation
Ground microphones and digital correlators listen for the specific hiss of pressurised water forcing its way out of a pipe, then triangulate the exact point.
Tracer gas testing
A harmless hydrogen and nitrogen mix is introduced into drained pipework, escapes at the fault, and is picked up at the surface by a gas sensor.
Moisture mapping and salts analysis
Pin and pinless meters chart how wet a structure is, and a salts test tells us whether the water arrived from a pipe, from the ground, or from the weather.
Pressure and flow testing
Isolating and pressurising each circuit in turn proves which one is losing water, and how fast, before anything is opened up.
CCTV drainage survey
A self-levelling camera crawls the drain run and records exactly what is broken, where it is, and how deep.
Borescope inspection
A camera on a flexible probe goes through a hole the size of a pencil to look inside a void, wall or ceiling.
Tracer dye testing
Non-staining fluorescent dye is added to one water source at a time so the escaping water carries a colour-coded label.
Pipe and cable tracing
A signal generator puts a tone on the pipe and a receiver follows it, so we map the route and depth before anyone digs.
Roof integrity and voltage testing
Low-voltage electronic testing finds breaches in a flat-roof membrane that are invisible from the surface.
Questions
Leak detection in Merton: your questions
How quickly can you get to Merton?
Covered by our South West London team. We answer the phone 24 hours a day, 7 days a week and target a 1 hour response across our coverage area, with no surcharge for an emergency call-out.
Which parts of Merton do you cover?
All of it. We work across SW19, SW20, CR4, SM4, including Wimbledon, Mitcham, Morden, Raynes Park, Colliers Wood and Wimbledon Park. If your postcode sits just outside that list, call and ask — we regularly work on the boundary.
What causes most leaks in Merton?
Wimbledon Village and the surrounding streets hold large Victorian and Edwardian houses that have been comprehensively remodelled, frequently with basements and whole-house underfloor heating, while Mitcham and Morden are largely interwar estate housing on clay. The two halves of the borough need completely different first moves. In practice that means the faults we are called to most often here are whole-house underfloor heating faults in remodelled wimbledon houses, basement conversion ingress and tanking failures, interwar supply pipework failing under solid floors in mitcham and morden.
Who is responsible for a leak on my supply pipe in Merton?
Mains water in Merton is supplied by Thames Water. As a general rule the supply pipe from the boundary stop tap into your property is yours to maintain, and everything on the street side belongs to the water company. Our report states which side of that boundary the fault sits on, which matters because many water companies will repair a first leak on a customer supply pipe at no charge.
How much does leak detection cost in Merton?
The same as everywhere else we work — there is no Merton premium. Weekday surveys start at £54.00 + VAT with a half-hour minimum and no call-out fee, evenings and weekends from £69.75 + VAT, and late nights from £90.00 + VAT.
Will my insurer accept a leak detection report from you?
Our reports are written to the evidence standard loss adjusters work to: calibrated moisture readings, dated photographs, a stated methodology and a clear causation finding. Trace and access cover in your buildings policy will usually pay for the survey itself as well as the damage caused by getting to the leak.
We also cover these London areas
- Barking and Dagenham
- Barnet
- Bexley
- Brent
- Bromley
- Camden
- Croydon
- Ealing
- Enfield
- Greenwich
- Hackney
- Hammersmith and Fulham
- Haringey
- Harrow
- Havering
- Hillingdon
- Hounslow
- Islington
- Kensington and Chelsea
- Kingston upon Thames
- Lambeth
- Lewisham
- Newham
- Redbridge
- Richmond upon Thames
- Southwark
- Sutton
- Tower Hamlets
- Waltham Forest
- Wandsworth
- Westminster
- City of London
Leak in Merton? We can be with you today.
Call 020 3411 2030 for free advice over the phone, or book a survey online. No call-out fee and no emergency surcharge.