Leak Detection in Greenwich, London

Clear Flow regularly investigates leaks in listed and heritage properties across Blackheath and Greenwich town centre (SE10). Georgian terraces and Victorian villas in these areas often carry original or early-replacement pipework concealed within lath-and-plaster walls or beneath original timber floors, and any investigation must avoid damaging protected fabric. Our engineers use thermal imaging cameras to identify temperature anomalies behind surfaces, tracer gas to confirm pipe routes and failure points, and acoustic listening equipment to narrow the location further — all without opening walls or lifting boards at the investigation stage. Once the leak point is confirmed precisely, we produce a written report documenting the method, the finding, and the recommended remediation scope. This is accepted by most home insurers and allows contractors to open only the confirmed area, minimising disruption to historic interiors.

Pressure loss in an underfloor heating circuit is one of the most common call-outs we receive from the Woolwich Arsenal development and other new-build blocks across SE18. Wet underfloor systems in these apartments circulate water through plastic pipework embedded in a concrete or anhydrite screed, and a pinhole failure can bleed pressure slowly over days or weeks before any visible damp appears at the surface. Clear Flow’s engineers use thermal imaging to map the heat distribution across the floor and identify cold spots indicating a break in flow. Tracer gas then confirms the precise leak point to within a few centimetres. No screed cutting or floor removal takes place until the exact location is known, protecting finished flooring and significantly reducing the cost of reinstatement. We include a written report with every investigation.

Inter-floor leaks between flats are a frequent source of disputes in Eltham (SE9) and across the wider Greenwich ex-local authority and converted stock. Water migrating down through a ceiling from the flat or pipework above can originate from a burst supply pipe, a failed radiator connection, or a fitting beneath a kitchen or bathroom — and the visible staining rarely indicates directly where the source lies. Clear Flow investigates these cases using acoustic listening equipment and thermal imaging, tracing the path of the water back to its origin point above. We produce a written report with photographs and diagrams suitable for insurance claims, landlord and tenant correspondence, or building management disputes. We serve all residential blocks across SE9 and the wider borough, covering both freehold and leasehold properties.

Clear Flow provides same-day response across the full borough of Greenwich, including Charlton and the streets of SE7 around Greenwich Peninsula, and the outer residential areas of Abbey Wood and Thamesmead in SE28. For urgent call-outs involving active water loss or visible structural damp, we prioritise same-day attendance wherever engineer availability allows. Our engineers carry thermal imaging, tracer gas, and acoustic equipment as standard on every visit, so a single call-out is usually sufficient to locate the fault without needing a return survey. SE28 sits at the eastern boundary of our Greenwich coverage, adjacent to Bexley, and is included as a standard part of the borough service — there is no additional travel charge for Abbey Wood or Thamesmead within SE28.

Recurring pressure loss in a central heating system within an ex-local authority flat or house in Plumstead (SE18) is a strong indicator of a slow leak somewhere in the circuit, although air ingress or a faulty pressure relief valve can produce similar symptoms. Many ex-council properties across SE18 and SE9 were built with pipework concealed within the floor screed or chased into walls, which makes locating the source difficult without specialist equipment. Clear Flow’s engineers begin each investigation with a pressure test to distinguish a genuine leak from air ingress or valve failure. Where a leak is confirmed, thermal imaging and tracer gas are used to identify the exact failure point without disturbing floor coverings or wall plaster. Our NoFindNoFee guarantee means that if no leak is found, no charge is made for the investigation.