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Harrow · HA1, HA2, HA3

Leak Detection in Harrow

Non-destructive water leak detection across Harrow, 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 Harrow homeowners, landlords & property managers
Quick answer: If you have a suspected water leak at a property in Harrow, 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 Harrow

Harrow's housing spans Edwardian villas around Harrow on the Hill, dense 1930s semis and bay-fronted terraces across Wealdstone and Headstone, and post-war flat conversions near Rayners Lane. This mix of original clay plumbing, later loft and bathroom extensions, and ageing flat-roofed additions on semis creates plenty of joints, seals and pipe runs prone to hidden leaks over time.

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 Harrow we cover

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

Common leaks in Harrow homes

Extended semis with hidden pipework

Many Harrow semis in Kenton and South Harrow have had kitchen or bathroom extensions bolted onto the rear, rerouting supply and waste pipes under solid floors or within stud walls. Joints in these later additions often sit unseen for years, and a slow leak can soak subfloor insulation and joists long before staining appears on a ceiling below.

Flat-roofed extensions and dormer conversions

Loft conversions and flat-roofed rear extensions are common across Harrow Weald and Pinner, where felt or GRP coverings degrade quietly with age. Once the membrane perishes around flashing or upstands, rainwater tracks along roof timbers and down into bedroom ceilings, often travelling some distance from the actual breach before any damp patch becomes visible.

Converted flats and shared bathrooms above shops

Wealdstone and parts of Harrow town centre include flats above commercial units and older houses split into multiple units, meaning bathrooms often sit directly above another occupied space. A failed shower tray seal or cracked waste pipe joint can send water through the floor into the ceiling below, causing disputes over responsibility and damage that spreads before it is reported.

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 Harrow?

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

Frequently asked questions

How much does leak detection in Harrow 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 Harrow

Damp and mould survey

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

Structural drying

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

Mould removal

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