Damp, mould & leak services in Harrow on the Hill
Harrow on the Hill's housing stock is dominated by Georgian and Victorian villas within its conservation area, many tied to Harrow School's estate, alongside Edwardian terraces and 1930s mock-Tudor semis lower down the hill. Solid brick walls, ageing slate roofs and single-glazed sash windows are common, and the hill's clay subsoil and steep gradients make these older properties prone to penetrating damp, rising damp and drainage-related leaks.
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 on the Hill we cover
We visit properties right across Harrow on the Hill and its neighbourhoods, including:
- Harrow Weald
- Roxeth
- Sudbury Hill
- Greenhill
- West Harrow
- North Harrow
- South Harrow
- Wealdstone
- Northwick Park
- Pinner View
- Kenton
- Harrow Town Centre
Common damp problems in Harrow on the Hill homes
Solid Wall Damp in the Conservation Area's Georgian and Victorian Villas
Many properties around the historic hilltop and Church Hill have solid brick walls with no cavity, built before damp-proof courses were standard. Original lime render has often been replaced with modern cement render, trapping moisture inside the walls. This causes rising damp at skirting level and damp patches on chimney breasts, particularly in ground-floor rooms facing the prevailing wind on the exposed hilltop.
Roof and Guttering Leaks on Steeply Pitched Slate Roofs
The steep slate and clay-tile roofs typical of Harrow on the Hill's older villas and school-adjacent buildings are prone to slipped or cracked tiles after storms, especially given the hill's exposure. Ageing cast-iron guttering and hidden valley gutters on Victorian additions frequently overflow or corrode, sending water down into loft insulation and ceiling voids, leading to mould blooms in bedrooms below and stained plasterwork.
Condensation and Mould in Converted Flats and Basement Rooms
Around Sudbury Hill, Roxeth and West Harrow, many larger Victorian and Edwardian houses have been split into flats with poor ventilation and shared, often blocked, airbricks. Basement and semi-basement conversions near the lower slopes suffer from lateral damp pushing through solid retaining walls, while draught-proofing added to sash windows upstairs traps humid air, producing black mould around window reveals and in bathrooms lacking extraction.
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 on the Hill
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 on the Hill.
Frequently asked questions
How much does a Damp, Mould and Water Damage Assessment in Harrow on the Hill cost?
Do you cover the whole of Harrow on the Hill?
Can you tell the difference between condensation, rising and penetrating damp?
Do you provide reports for insurance claims?
More help in Harrow on the Hill
Leak detection
Trace a hidden water leak in Harrow on the Hill using thermal, acoustic and tracer gas methods, with minimal damage. Leak detection in Harrow on the Hill →
Structural drying
Dry walls, floors and voids in Harrow on the Hill after a leak or flood, monitored to completion. Structural drying in Harrow on the Hill →
Mould removal
Treat black mould in your Harrow on the Hill property and fix the moisture source behind it. Mould removal in Harrow on the Hill →