Damp, mould & leak services in South Harrow
South Harrow grew largely as Metroland suburbia in the 1920s and 1930s, giving rise to long rows of pebbledash-rendered semis and terraces around Northolt Road and Roxeth, alongside interwar purpose-built flats near the station and later post-war infill. Solid brick walls without cavities, ageing render and shallow bay windows make these properties prone to penetrating and rising damp, while poorly ventilated flat conversions suffer recurring condensation.
Leak Detection
Trace hidden water leaks without damage using thermal, acoustic and tracer-gas methods. Leak detection →
Damp Investigation
Identify rising damp, penetrating damp and condensation, and tell them apart properly. Damp investigation →
Mould Inspection
Find the moisture source feeding the mould, not just treat the surface. Mould inspection →
Structural Drying
Dry out walls, floors and voids after a leak or flood, monitored to completion. Structural drying →
Areas of South Harrow we cover
We survey properties right across South Harrow and its neighbourhoods, including:
- South Harrow
- Roxeth
- Sudbury Hill
- West Harrow
- Rayners Lane
- Northolt Road
- Alexandra Avenue
- Harrow-on-the-Hill
- Harrow Garden Village
- Vaughan Road area
- Northolt
- South Harrow Station area
Common damp problems in South Harrow homes
Pebbledash and solid-wall semis in Roxeth and around Northolt Road
Many 1930s semis here were built with solid nine-inch brick walls rendered in pebbledash, a finish that cracks and traps water against the brickwork over decades. Once moisture penetrates, it tracks through to internal plaster, producing damp patches beneath windows and along skirting boards. Without a working cavity to break the path, penetrating damp in these Roxeth streets is often mistaken for rising damp and treated incorrectly.
Flat-roofed rear extensions off Alexandra Avenue and Vaughan Road
Kitchen and bathroom extensions bolted onto Metroland semis around Alexandra Avenue frequently carry ageing felt or asphalt flat roofs with minimal falls. Ponding water finds its way through perished flashing where the extension meets the original wall, showing up as staining on the ceiling join or damp creeping down the adjoining chimney breast. Ongoing leaks here often go unnoticed until plaster or timber joists have already begun to soften.
Condensation mould in South Harrow's purpose-built flats
The interwar and post-war flat blocks clustered near South Harrow station were built with solid concrete floors and limited trickle ventilation, so bathrooms and galley kitchens struggle to shed moisture from daily use. Black mould gathers in corners, behind wardrobes on external walls and around window reveals, particularly in ground and top-floor units where thermal bridging is worst and extractor fans are often missing or disconnected.
What our customers say
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, via Google
I have been dealing with damp and mould for years but these guys were able to come in and resolve the problem quickly and professionally. Their prices were fair and reasonable and they got the job done clean. 10/10 would use again and would recommend.
Thersa Waron Eurmind, via Google
Very helpful and professional, easy to communicate with about my mould issues and I received fast responses from the company on the best solutions for me. would recommend to all friends and family. 5/5
Jensen B, via Google
Book a survey in South Harrow
Call 020 3051 8478 or request a survey online. We work with homeowners, landlords and property managers across South Harrow. Works are on a 50% upfront, 50% on completion basis.