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Leak detection in Lewisham

Non-invasive water leak detection, repair and insurance reporting across Lewisham 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 East London team.

Local knowledge

What actually leaks in Lewisham

Lewisham is largely Victorian and Edwardian terraces on London Clay, with the Ravensbourne and Quaggy rivers running through it and a long history of surface water flooding at Lewisham and Catford. Clay movement stresses drains, and the flood history means insurers scrutinise damp claims here closely, so a properly evidenced causation finding matters more than usual.

That is not trivia. It changes where we start. Knowing that a Lewisham 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

  • Clay movement fracturing Victorian drain runs
  • Surface water flood history complicating damp claims
  • Escape of water between flats in terraced conversions
  • Rear addition roof and valley gutter failures
  • Original lead and cast iron services at end of life

Neighbourhoods we cover in Lewisham

  • Lewisham
  • Catford
  • Deptford
  • Forest Hill
  • Sydenham
  • Blackheath
  • New Cross

Plus every street in SE4, SE6, SE8, SE12, SE13, SE14, SE23, SE26. If you are just outside, call and ask.

Services

What we do in Lewisham

Every service below is available across SE4, SE6, SE8, SE12, SE13, SE14, SE23, SE26, at the same published rates we charge everywhere else.

Equipment

How we survey a property in Lewisham

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 Lewisham: your questions

How quickly can you get to Lewisham?

Covered by our South East 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 Lewisham do you cover?

All of it. We work across SE4, SE6, SE8, SE12, SE13, SE14, SE23, SE26, including Lewisham, Catford, Deptford, Forest Hill, Sydenham, Blackheath and New Cross. If your postcode sits just outside that list, call and ask — we regularly work on the boundary.

What causes most leaks in Lewisham?

Lewisham is largely Victorian and Edwardian terraces on London Clay, with the Ravensbourne and Quaggy rivers running through it and a long history of surface water flooding at Lewisham and Catford. Clay movement stresses drains, and the flood history means insurers scrutinise damp claims here closely, so a properly evidenced causation finding matters more than usual. In practice that means the faults we are called to most often here are clay movement fracturing victorian drain runs, surface water flood history complicating damp claims, escape of water between flats in terraced conversions.

Who is responsible for a leak on my supply pipe in Lewisham?

Mains water in Lewisham 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 Lewisham?

The same as everywhere else we work — there is no Lewisham 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.

Leak in Lewisham? 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.