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Leak Detection New Malden
Hidden water leaks in New Malden pinpointed without opening floors or walls — acoustic, thermal imaging and tracer gas detection with no find, no fee, from engineers who know New Malden buildings.
Local knowledge
New Malden housing, from a leak engineer's side
New Malden is largely interwar semi-detached housing, 1920s and 1930s bay-fronted semis with solid or early-cavity walls, alongside pockets of post-war infill and later flats. These semis were plumbed with galvanised and early copper runs that have since been part-renewed, so mismatched materials meet under ground floors and inside chimney-breast recesses. Many have rear kitchen and dining extensions, often with screed floors and underfloor heating, which bury pipework out of sight. The ground here sits further from the Thames than riverside Kingston, so live leaks are a more common cause of damp than ground water, but proving that with detection still avoids needless digging. Concrete and screed floors make targeted, non-invasive tracing essential rather than exploratory lifting.
Engineer's note
New Malden semis usually leak from buried pipework in slabs and screed rather than the water table, but I still prove it before breaking out. Moisture profiling rules damp in or out as a leak, thermal imaging and pressure testing locate the loss in heated floors, and non-destructive tracing pins the point. It all goes into an insurer-ready trace and access report.
Covered in New Malden
- 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
What fails here
Common leak problems in New Malden
01
Underfloor heating leaks in screed extensions
Rear extensions on these semis run wet underfloor heating in screed, and a pinhole or weeping manifold joint drops pressure without surfacing. Thermal imaging maps the warm circuit and pressure testing confirms the loss, isolating the fault to a small zone so tiles are lifted over the leak alone rather than across the whole extension floor.
02
Galvanised-to-copper transition corrosion
Interwar semis often keep sections of galvanised supply pipe joined to newer copper, and the dissimilar metals corrode at the junction, leaking under solid ground floors. A slow rise in the meter with faint floor damp points here. Acoustic tracing and moisture readings locate the buried transition so the opening is confined to that spot.
03
Chimney-breast and party-wall damp
Damp around chimney breasts and party walls in these houses can be a bathroom or heating feed run in the recess rather than a structural fault. Moisture profiling distinguishes a clean-water leak from condensation or salt-laden penetrating damp, so the right trade is called and the wall is not opened on a wrong assumption.
04
Concrete ground-floor slab leaks
Post-war and extended sections sit on concrete slabs that hide supply runs, so a leak spreads laterally and appears well away from its source. Non-invasive tracing with acoustic correlation and thermal imaging finds the actual point in the slab, keeping any break-out small and the repair fixed to the fault rather than the room.
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.
Leak detection in New Malden — FAQs
How quickly can you attend a leak in New Malden?
Same-day appointments are usually available in New Malden and across Kingston upon Thames, and next-day almost always. If water is actively escaping, say so when you book — live leaks are prioritised and we can talk you through isolating the supply while the engineer travels.
What does leak detection cost in New Malden?
A fixed fee agreed at booking — typically £250–£450 for a domestic detection visit — covered by no find, no fee. That includes pressure testing per circuit, thermal imaging, acoustic survey and moisture mapping. Repairs are quoted separately before any work starts.
Do you know New Malden properties?
Yes — New Malden is largely interwar semi-detached housing, 1920s and 1930s bay-fronted semis with solid or early-cavity walls, alongside pockets of post-war infill and later flats. These semis were plumbed with galvanised and early copper runs that have since been part-renewed, so mismatched materials meet under ground floors and inside chimney-breast recesses. Many have rear kitchen and dining extensions, often with screed floors and underfloor heating, which bury pipework out of sight. The ground here sits further from the Thames than riverside Kingston, so live leaks are a more common cause of damp than ground water, but proving that with detection still avoids needless digging. Concrete and screed floors make targeted, non-invasive tracing essential rather than exploratory lifting.
Can you provide a report for my insurer?
Every New Malden detection visit can produce an insurer-ready trace and access report — cause, precise origin, methods used, moisture map and photos — typically within 48 hours.
Nearby in Kingston upon Thames
Read before you book
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ReadWhere we work
New Malden & Kingston upon Thames
Map data © OpenStreetMap contributors.
Losing water in New Malden?
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