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Clapham North · SW4, SW9

Leak Detection in Clapham North

Non-destructive water leak detection across Clapham North, tracing hidden leaks with thermal imaging, acoustic sensors and tracer gas, then drying and treating the damage before it becomes mould.

Call 020 3051 8478Report a leak
★★★★★ 4.9 from 18 Google reviews · trusted by Clapham North homeowners, landlords & property managers
Quick answer: If you have a suspected water leak at a property in Clapham North, our specialists trace the source without tearing the place apart, using thermal, acoustic and tracer-gas methods. A leak is not over when the water stops. Mould can start within 48 hours, so we find the source, dry the structure and treat any mould, all with one company. Leak detection is £800 to £1500 depending on scale. Call 020 3051 8478.
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Leak to dry to treated, one company in Clapham North

Clapham North is dominated by tall Victorian terraces split into flats, along with mansion blocks near the High Street and low-rise conversions towards Stockwell and Larkhall Park. Shared soil stacks, communal flat roofs over rear extensions, and stacked bathrooms plumbed one above another mean a single failed joint or perished seal can send water tracking through several floors before anyone notices.

Leak Detection

Trace hidden water leaks without unnecessary damage using thermal, acoustic and tracer-gas methods. Leak detection →

Structural Drying

Dry walls, floors and voids after a leak or flood with monitored dehumidifiers, to completion. Structural drying →

Mould Treatment

Treat and prevent the mould that follows water damage, dealing with the moisture source first. Mould treatment →

Damp Investigation

Tell rising damp, penetrating damp and condensation apart, so the right repair is done once. Damp investigation →

Areas of Clapham North we cover

We attend leaks right across Clapham North and its neighbourhoods, including:

Common leaks in Clapham North homes

Stacked bathrooms in Victorian conversions

Many Clapham North terraces were split into two or three flats, each retaining its original bathroom directly above the one below. Waste pipes, shower trays and bath seals installed decades ago sit hidden behind boxing and floorboards. When a seal perishes or a solvent-weld joint fails, water seeps into the ceiling void of the flat beneath, often tracking sideways along joists before staining plasterboard, so the visible mark rarely sits below the actual leak point.

Flat roof extensions over kitchens and reception rooms

Rear additions on the terraced streets around Clapham Park and Abbeville Village typically carry a felt or GRP flat roof over an extended kitchen or living space. These roofs age faster than pitched slate and are prone to splitting at upstands, parapets and rooflight junctions. Water entering through a cracked membrane can travel along the roof deck before dropping through a light fitting metres away, making the leak source difficult to pinpoint without opening the ceiling.

Failed plumbing in converted and mansion block flats

Purpose-built mansion blocks and subdivided houses near Clapham High Street and Stockwell often run concealed pipework through boxed ducts, kitchen cupboards and communal risers. Corroded compression joints, cracked isolation valves under sinks, or a failed connection behind a dishwasher can leak steadily for weeks in a low-use area. In blocks with shared risers, escape of water frequently affects the flat below rather than the source flat itself, complicating early detection.

What our customers say

★★★★★

I recently used a damp and mould specialist company and was extremely impressed with the service from start to finish. From the initial survey, they were knowledgeable, thorough, and took the time to clearly explain the cause of the issue rather than just treating the symptoms.

Tarik Barak, via Google

★★★★★

Was lovely working with the team and they did a fantastic and quick job to get all the mould out of my bathroom. Very much looking forward to working with them on other projects around my house!! Thank you for everything and shout out to Karim for being so sweet!

Mariama, via Google

★★★★★

Omg what brilliant service, excellent the cleaner did a very good job was efficient he took his time and cleaned everything, highly recommend S. Bessim…

Susan Bessim, via Google

Tip: If your water meter ticks over with every tap off, or a wall or ceiling stays damp with no obvious cause, there is a hidden leak. Finding it early is far cheaper than repairing the mould and damage it leaves behind.

Suspect a leak in Clapham North?

Call 020 3051 8478 or report a leak online. We trace, dry and treat for homeowners, landlords and managing agents across Clapham North.

Frequently asked questions

How much does leak detection in Clapham North cost?
Leak detection is £800 to £1500 depending on the scale and access. You get a written, insurance-ready report identifying the source.
Will you damage my home finding the leak?
No. We use non-destructive thermal imaging, acoustic sensors and tracer gas to pinpoint the leak before any access is opened up, so repairs are targeted.
Do you fix the damage after finding the leak?
Yes. A leak is not over when the water stops. We dry the structure with monitored dehumidifiers and treat any mould, so it is handled end to end.
Do you provide reports for insurance claims?
Yes. Every leak investigation comes with a clear written report including the cause, photographic evidence and recommendations, formatted for insurers and managing agents.