Where we work

Leak Detection in London

London homes hide pipework in terraces, conversions, mansion blocks and new apartments, often all in one street. We work across the boroughs below from our Watford base.

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Thermal imaging camera showing the temperature pattern of a hallway floor

Working here

Leaks in London homes

In London a leak rarely stays in one home. Water from a bathroom in a converted house ends up in the flat below, a communal riser feeds a stain in a hallway, and a supply pipe under a paved front garden shows only on the meter. Proving where the water comes from matters as much as finding it, so our reports are written to settle responsibility between flats, freeholders and insurers as well as to support a trace and access claim.

Parking is controlled on most London streets, so we plan around bays and visitor permits and bring the equipment in on a trolley. Pick your area below for the housing we see there and the methods that suit it.

North West London

Leaking pipe joint inside a wall with the staining it caused

NorthwoodLeaking pipe joint found inside a wall in Northwood, HA6, with tracer gas.

Thermal image of pipework under a bathroom floor beside the toilet

StanmoreLeak surveys carried out in Stanmore and Kenton, HA7.

Acoustic leak detector held in the hand showing a reading of 353 in a hallway

HarrowNorth West London · HA1, HA2, HA3

Corroded water pipe leaking in a small excavated trench

EdgwareLeaking supply pipe found under a solid floor in Edgware, HA8, with acoustic detection.

Tracer gas detector with its probe at a skirting board on a wooden floor

PinnerNorth West London · HA5

Thermal camera showing a leaking hot pipe under a kitchen floor

Ruislip and EastcoteNorth West London · HA4

Acoustic leak detection kit with the floor microphone set up over a suspected leak

Uxbridge and IckenhamNorth West London · UB8, UB10

Tracer gas detector at an opened pipe chase in a wall

Wembley and KingsburyNorth West London · HA9, HA0, NW9

Thermal image showing underfloor heating loops running under a wooden floor

Hendon and Mill HillNorth West London · NW4, NW7

Tracer gas detector reading 24 at a herringbone-tiled bathroom wall

Willesden and NeasdenNorth West London · NW10

North London

Tracer gas detector reading 46 in a kitchen

Barnet and Hadley WoodKitchen leak traced in Hadley Wood, EN4, with tracer gas.

Tracer gas detector reading 580 at an inspection chamber on block paving

EnfieldNorth London · EN1, EN2, EN3

Small pipe chase opened in a wall exactly where the leak was located

Palmers GreenLeak pinpointed and exposed through one small wall chase in Palmers Green, N13.

Water spraying from a burst underground pipe exposed in a small excavation

Winchmore HillBurst underground pipe found and exposed in Winchmore Hill, N21, with acoustic detection.

Thermal camera held over a floor with the underfloor heating pipes showing in orange

Muswell HillUnderfloor heating mapped and a floor void inspected in Muswell Hill, N10.

IslingtonHallway floor scanned with thermal imaging in Islington, N1.

Bath filled with red dye during a bathroom leak test

West HampsteadBathroom leak traced with a dye test in West Hampstead, NW6.

Thermal camera picking out a pipe under a wooden floor by a doorway

Kilburn and BrondesburyUnderfloor heating loops isolated and a pipe traced under a wooden floor in Brondesbury, NW6.

Pressure test gauges connected to a heating system

FinchleyNorth London · N3, N12

Borescope camera screen showing pipework under a bathroom floor

Golders Green and Hampstead Garden SuburbNorth London · NW11

Tracer gas detector held against a damp patch on a painted wall

Highgate and Crouch EndNorth London · N6, N8

Wood Green and TottenhamNorth London · N22, N17, N15

Tracer gas detector at an inspection chamber with the lid off on a paved drive

Southgate and OakwoodNorth London · N14

Engineer scanning a hallway wall with a thermal imaging camera during a leak survey

Camden and Kentish TownNorth London · NW1, NW5

St John's Wood and Maida ValeNorth London · NW8, W9

West and South West London

Tracer gas detector reading 96 at a pipe chase in a wall

Isleworth and HounslowLeak confirmed at a pipe chase in a wall in Isleworth, TW7, with tracer gas.

Red dye test in a bath to trace where water is escaping

Hampton and TwickenhamBathroom leak traced with dye tests in Hampton, TW12.

Earlsfield and WandsworthWater main leak traced at an inspection chamber in Earlsfield, SW18, with tracer gas.

Thermal camera showing a hot spot on a kitchen floor in front of the cooker

Ealing and ActonWest London · W5, W3, W13

Green dye test in a bath to trace a leak from the waste or overflow

ChiswickWest London · W4

Tracer gas detector on a lifted floorboard with the pipe exposed between the joists

Hammersmith and FulhamWest London · W6, SW6

Thermal image of a heating pipe run under the floor, showing the exact line to open up

Kensington and ChelseaWest London · W8, SW3, SW10

Acoustic leak detector reading 599 against an outside wall on a mains water leak

Richmond and KewSouth West London · TW9, TW10

Kingston and SurbitonSouth West London · KT1, KT2, KT6

Thermal camera in hand showing a hot spot where a heating pipe is leaking

WimbledonSouth West London · SW19, SW20

Tracer gas detector and tools on the floor beside a radiator during a heating leak survey

PutneySouth West London · SW15

South and South East London

Close-up of an acoustic leak detector screen reading 295 over a suspected leak

Stockwell and ClaphamLeak identified in Stockwell, SW9, with pressure testing, acoustic detection and water sampling.

Kidbrooke and GreenwichHeating leak found and confirmed in Kidbrooke, SE3, with thermal, acoustic and tracer gas detection.

Underfloor heating manifold with blue pipes during a leak test

BromleyUnderfloor heating tested loop by loop at the manifold in Bromley, BR1.

Corroded copper pipe found leaking under a floor

Lewisham and DulwichSouth East London · SE13, SE21, SE22

Acoustic leak detector with ground microphone on a tiled floor reading 505

CroydonSouth London · CR0, CR2

Underfloor heating pipes laid on insulation before the screed

SuttonSouth London · SM1, SM2

Boiler pump and pipework checked for leaks

Beckenham and OrpingtonSouth East London · BR3, BR5, BR6

Corroded section of pipe removed after the leak was found and repaired

Bexley and SidcupSouth East London · DA5, DA14, DA15

East London and Essex

Thermal imaging camera screen showing a hot water pipe glowing inside a wall

Walthamstow and ChingfordEast London · E17, E4

Loughton and EppingEssex · IG10, CM16

Woodford and IlfordEast London · IG8, IG1

Blue MDPE water main joint found leaking in an excavation

Romford and HornchurchEast London · RM1, RM11, RM12

Underfloor heating manifold with loops isolated to find the leaking circuit

BrentwoodEssex · CM13, CM14, CM15

Close-up of a pressure gauge during a nitrogen test on pipework

HarlowEssex · CM17, CM18, CM19, CM20

Borescope camera screen showing the void under a floor

Hackney and Stoke NewingtonEast London · E8, E9, N16

Stratford and LeytonEast London · E15, E10, E11

How it works

From your first call to a leak you can see in the report

Tell us what you are seeing

Call or WhatsApp with a few photos and a line about the symptoms. We ask a handful of questions, agree a fixed price and book the survey, usually for the same or the next day.

Work out which system is leaking

On arrival we pressure test the mains, hot water and heating, check the meter and test the escaping water, so we know what we are looking for before the detection starts.

Pinpoint the leak without opening up

Thermal imaging, the acoustic ground microphone and tracer gas are used as the pipework dictates until the leak is marked on the floor or wall.

Report, and repair if you want it

You get a written report with readings, thermal images and photographs, ready for a trace and access claim. If you want the leak fixed, we open that one spot and repair it.

Insurance claims

A report your insurer can act on

Most buildings insurance policies include trace and access cover for finding a hidden leak and making good the way in. Our report is written for that claim: what we tested, what we found, where it is, with photographs, thermal images and readings.

Turn off the stop tap or the heating and stop topping up
Photograph the damage, the boiler gauge and the meter
Tell your insurer a leak is suspected and detection is being arranged
Trace and access pays to find the leak and make good the access

How a claim works Trace and access reports

Copper supply pipe and stopcock exposed in a neat excavation through a concrete floor

Act now

Still losing water? Every day adds to the damage.

Call now and we will tell you straight away whether it needs a same-day visit. Or send a photo of the stain, the meter or the boiler gauge on WhatsApp.

07516 755 680

Call now WhatsApp a photo Book a survey