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Harlesden · NW10

Leak Detection in Harlesden

Non-destructive water leak detection across Harlesden, 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
★★★★★ 5.0 from 20 Google reviews · trusted by Harlesden homeowners, landlords & property managers
Quick answer: If you have a suspected water leak at a property in Harlesden, 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.
On this page

Leak to dry to treated, one company in Harlesden

Harlesden's housing stock is a mix of Victorian and Edwardian terraces split into flats, interwar bay-fronted houses, and post-war council low-rise blocks around Stonebridge. Many terraces have been converted with bathrooms stacked above one another and extended to the rear, so ageing pipework, shared soil stacks and flat-roofed additions sit above living space, making hidden leaks common and often slow to notice.

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 Harlesden we cover

We attend leaks right across Harlesden and its neighbourhoods, including:

Common leaks in Harlesden homes

Converted terraces with stacked bathrooms

Many Harlesden terraces were split into upper and lower flats decades ago, with the original single bathroom duplicated directly above another. Old waste pipes, resealed baths and shower trays in these conversions often fail quietly, sending water through the ceiling void into the flat below. Because the leak is hidden behind plasterboard, tenants and landlords frequently only notice once staining or a sagging ceiling appears.

Flat-roofed rear extensions and loft conversions

Rear kitchen extensions and loft conversions are common additions to Harlesden's Victorian and Edwardian terraces, and most were finished with a flat felt or asphalt roof. These coverings perish faster than pitched tiles, especially where flashing meets the original brickwork. Once the membrane cracks, rainwater tracks along joists and insulation for some time before it shows as a damp patch, so the actual entry point is rarely where the stain appears.

Ageing risers and seals in post-war blocks

Around Stonebridge and Church End, post-war council low-rise blocks rely on shared plumbing risers and communal flat roofs installed decades ago. Perished pipe joints, corroded seals and degraded roof coverings in these buildings can let water travel between floors and adjoining flats before it is reported. In blocks with multiple occupancy, this hidden escape of water often affects several homes at once, making early detection behind walls and floors particularly important.

What our customers say

Excellent
Rated 5.0 / 5 based on 20 reviews on

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✓ a month ago

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✓ 2 months ago

Amazing company! They responding very quickly. They have a low prices as well, not crazy quotes like from others. Job has been done very quickly and team was very professional. I will use them in the future if I needed. Thanks!

Patryk Gutowski✓ 2 months ago

Really impressed with the whole experience. The surveyor did a proper, thorough job and didn't rush anything, they got to the root cause of the damp and explained it all clearly. Detailed, professional and reassuring from start to finish. Couldn't recommend them more highly.

Keiryn Raf✓ 3 months ago

Very professional and organised I must say came out and completed the work very efficiently customer service was excellent. Definitely recommend this damp and mould service to anyone looking for a job done correctly. :)

Joeie Rouse✓ 5 months ago
See all reviews on 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 Harlesden?

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

Frequently asked questions

How much does leak detection in Harlesden 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.

More help in Harlesden

Damp and mould survey

Find the real cause of damp, mould or a leak in a Harlesden property, with a written report and photographs. Damp survey in Harlesden →

Structural drying

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

Mould removal

Treat black mould in a Harlesden property and fix the moisture source behind it. Mould removal in Harlesden →