Damp, mould & leak services in Harrow
Harrow's housing stock spans Edwardian terraces in Wealdstone, interwar semi-detached properties across Rayners Lane and South Harrow, Victorian villas near Harrow on the Hill, and post-war flat conversions throughout the borough. This variety of ages and construction methods creates persistent vulnerabilities to rising damp, condensation, and roof-related leaks, particularly in older properties where original building materials have deteriorated over decades.
Leak Detection
Trace hidden water leaks without damage using thermal, acoustic and tracer-gas methods. Leak detection →
Damp, Mould and Water Damage Assessment
One visit that finds the cause of damp, mould or water damage, and tells rising damp, penetrating damp and condensation apart. About the Assessment →
Mould Treatment
Treat black mould and deal with the moisture source behind it, so it does not keep coming back. Mould treatment →
Structural Drying
Dry out walls, floors and voids after a leak or flood, monitored to completion. Structural drying →
Areas of Harrow we cover
We visit properties right across Harrow and its neighbourhoods, including:
- Harrow on the Hill
- Wealdstone
- Harrow Weald
- Pinner
- North Harrow
- South Harrow
- Rayners Lane
- Hatch End
- Headstone
- Kenton
- Queensbury
- Stanmore
- Belmont
- Canons Park
Common damp problems in Harrow homes
Condensation and Mould in Interwar Semis
The large stock of 1930s semi-detached properties across Rayners Lane, Headstone, and North Harrow were built with solid or early cavity walls offering limited insulation. Cooking and bathing moisture has nowhere to escape in poorly ventilated kitchens and bathrooms, leading to persistent black mould growth on cold external walls and window reveals, particularly through the colder months.
Penetrating Damp in Victorian and Edwardian Terraces
Older terraced streets in Wealdstone and around Harrow on the Hill feature solid brick construction that absorbs rainwater readily when pointing deteriorates. Driving westerly rain, common across this elevated part of London, pushes moisture through aged brickwork and around window frames. Internal plaster staining, tide marks, and peeling decorations on front-facing walls are frequent indicators of this type of penetrating damp.
Hidden Leaks in Converted Flats and Purpose-Built Blocks
Harrow contains a significant number of converted Victorian houses and mid-twentieth century purpose-built flat blocks, particularly in Kenton, Belmont, and South Harrow. Shared pipework running between floors and within wall cavities is prone to slow leaks that go undetected for extended periods. Ceiling staining, damp patches beneath baths, and unexplained floor damage in upper flats frequently trace back to concealed plumbing failures in these properties.
What our customers say
Very appreciative of the service and their follow-ups
Excellent service from Damp & Mould Solutions. Kerim was my main point of contact throughout and was professional, knowledgeable and extremely helpful from start to finish. Communication was clear, everything was explained properly, and the work was handled efficiently and to a high standard. It’s refreshing to deal with a company that does what it says it will do and keeps you informed along the way. I’d happily recommend Damp & Mould Solutions to anyone dealing with damp or mould issues. Particular thanks to Kerim for making the whole process straightforward.
Friendly, approachable and most importantly professional. Great service!!
spoke with Karim who was incredibly knowledgable and helpful. He provided me with very useful information and went out of his way to help me. He also answered all my questions thoroughly. They were very fast to respond via email and wotsapp
Clearly communication, easy to deal with and responsive. We would thoroughly recommend. The report was really detailed making our buying negotiations a lot stronger and leaving us with a clear plan of action with possible timeframes.
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!
Top notch customer service from Kerim! He fully explained the process properly so we knew the ins and outs of the cost and the plan of action. The survey was done, they treated the mould and followed it up with a dehumidifier session and that's it no more mould, no more dampness and best of all no over complicated jargon and inflated prices. I left it a month before leaving this review to see if the mould would come back and I have had zero issues. I would highly recommend Damp & Mould Solutions UK.
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…
Fast and efficient service
Highly recommend this company, very professional but kind service provided.
Very positive experience. From the first call every detail of the process was explained clearly which put me at ease. Kerim shared knowledge of what I should expect from the survey, and what to expect from the treatment so I could plan my day accordingly. I was provided a quote the same day which was the most competitive of all the quotes I received. Easy to book, friendly to talk with and completely took away all my stress. If you're dealing with mould and in a similar situation as I was, these guys are definitely worth the call.
Kerim and his team were amazing! Firstly, they surveyed my home and the report they provided was very detailed and found the cause to be a leak from the bathroom. As it was an active leak we were quoted the same day and had his team over the next day to fix the leak. Once the leak was fixed they returned the following week to install drying units and treat the mould. They returned 2 weeks later to collect their machines and provided us with a certificate of dryness which proved it was all dry and fixed. All in all the whole process was efficient and I couldn't fault their service in the slightest. Within a month our home is back to feeling clean and stress free. We are glad to have found someone we can trust and we will definitely keep your number saved and we will be recommending you to all of our friends and family.
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.
We used Damp & Mould Solutions to check whether damp in our living room and bedroom was being caused by structural issues with our leasehold block or simply poor insulation/ventilation. The service was very impressive, with our surveyor David explaining the issues and best solutions clearly to my partner and I. The final report produced was professional and reassuring, meaning we don’t have to take a case to the council. Overall, fantastic service and would certainly use again!
Great experience with this company from start to finish. They were professional, knowledgeable, and explained everything clearly without any pressure. The work was carried out efficiently and to a high standard, and we’ve already noticed a big improvement. It’s reassuring to deal with a team that genuinely cares about doing the job properly. Highly recommend to anyone dealing with damp or mould issues.
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. :)
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.
Used Damp & Mould Solutions UK for a damp and mould issue at my property in South London. Really professional service, fast response and very knowledgeable. They use specialist equipment including thermal imaging which gave us a clear diagnosis. Would highly recommend to anyone dealing with damp, mould or a hidden leak.
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
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.
Request an Assessment in Harrow
Call 020 3051 8478 or send us your details and we will agree a date with you. We work with homeowners, landlords and property managers across Harrow.
Frequently asked questions
How much does a Damp, Mould and Water Damage Assessment in Harrow cost?
Do you cover the whole of Harrow?
Can you tell the difference between condensation, rising and penetrating damp?
Do you provide reports for insurance claims?
More help in Harrow
Leak detection
Trace a hidden water leak in Harrow using thermal, acoustic and tracer gas methods, with minimal damage. Leak detection 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 your Harrow property and fix the moisture source behind it. Mould removal in Harrow →