Damp Proofing & Mould Removal Specialists in Harlesden
Harlesden’s Victorian terraces were built between 1880 and 1910 as two-storey family homes. Today, most are subdivided into flats or operated as HMOs. This conversion history creates distinct damp problems: blocked air bricks, bridged DPCs, and condensation in individual flats where occupants have no control over whole-building ventilation. All need accurate diagnosis first.
Why Damp & Mould Solutions
Damp Specialists Who Know Harlesden Properties
Harlesden’s Victorian stock between the High Street, Manor Park Road, and Harlesden Green was not designed for multi-occupancy. When converted, sub-floor ventilation is frequently compromised, DPC levels get bridged by communal path works, and condensation accumulates in poorly-heated ground floor flats. Commercial units on the High Road often have solid concrete floors with no DPC.
CSRT-qualified surveyors
Every survey carried out by a qualified specialist — not a sales rep.
Detailed written reports
Useful for mortgage lenders, insurers, and property purchases.
10-year guarantee
On selected damp proofing treatments — transferable on property sale.
Same-week surveys
Fast availability across Harlesden postcodes — NW10.
Our services in Harlesden
Damp Proofing, Surveys & Mould Removal Across Harlesden
We treat every common cause of damp in Harlesden residential and commercial properties. Each service begins with a proper diagnosis — we don’t recommend treatment until we know the cause.
Rising Damp Treatment in Harlesden
Rising damp is common across Harlesden’s older housing stock — particularly pre-1940 properties where original DPCs have failed or are absent. It presents as tide marks, salt deposits, and damp lower walls up to around one metre.
- Chemical DPC injection — CSRT-specified method
- Tanking and replastering with damp-resistant render
- 10-year guarantee on completed works
- Salt removal and finishing included
Damp Survey in Harlesden
A professional damp survey is the only reliable way to distinguish rising damp from penetrating damp or condensation. We use calibrated moisture meters, boroscopes, and hygrometers to map your Harlesden property accurately.
- CSRT-qualified surveyor — independent, not sales-led
- Written report with photographs and moisture readings
- Suitable for home purchases, mortgage requirements, and insurance
- Fixed-price quotation provided where treatment is required
Penetrating Damp in Harlesden Properties
Penetrating damp — caused by defective pointing, cracked render, damaged roofing, or leaking gutters — appears as damp patches following rainfall. Common throughout Harlesden’s period and post-war stock.
- Source identified before any treatment is carried out
- External masonry repair, pointing, and waterproof coatings
- Internal tanking where required
- No surface-only treatments without root-cause repair
Mould Removal & Condensation Control in Harlesden
Black mould in Harlesden flats and converted houses is almost always caused by condensation and inadequate ventilation — not structural damp. We treat the mould and address the root cause so it doesn’t return.
- Professional mould removal and anti-fungal treatment
- Positive input ventilation (PIV) for whole-home humidity control
- Ventilation assessment and fan installation
- Landlord documentation provided on request
Timber Treatment in Harlesden — Wet Rot, Dry Rot & Woodworm
Older properties in Harlesden with suspended timber floors can be affected by damp-related decay. Wet rot and dry rot left untreated will compromise structural integrity. We carry out full diagnosis and treatment.
- Wet rot and dry rot identification and eradication
- Woodworm treatment and preventive application
- Joist and floor repair or replacement where required
- Moisture source addressed as part of the same works
Pre-Purchase Damp Survey in Harlesden
Buying a property in Harlesden? Our pre-purchase damp and timber survey gives you a clear picture before you exchange — with fast turnaround for buyers working to exchange deadlines.
- Independent report — no vested interest in recommending treatment
- Fast turnaround for buyers working to exchange deadlines
- Covers rising damp, penetrating damp, condensation, and timber
- Report format accepted by mortgage lenders and solicitors
Not sure which service you need?
That’s exactly what a damp survey is for. We’ll identify the cause of your problem — rising damp, penetrating damp, or condensation — and tell you what’s actually needed to fix it. No upselling, no unnecessary work. Learn more about our damp survey →
How it works
Our Process in Harlesden
We never recommend treatment before we know the cause. Every job starts with a proper survey — and we’ll tell you honestly if you don’t need us.
Survey
CSRT-qualified specialist assesses your Harlesden property — often same week
Report
Written diagnosis with moisture readings, photographs, and honest conclusions
Fixed Quote
Itemised, written quote — no surprises, no hidden charges, no obligation
Treatment
Works carried out by our own engineers — not subcontracted — with full aftercare
Recent work in Harlesden
Damp Problems We’ve Solved Across Harlesden
A small selection of recent jobs in the Harlesden area. Every property is different — these examples illustrate how we approach diagnosis and treatment in the local housing stock.
Victorian Terrace, Manor Park Road, Harlesden — Rising Damp in Ground Floor HMO
Multi-room HMO with rising damp to ground floor rooms. Survey identified failed original DPC, bridged DPC from raised communal path, and blocked sub-floor air bricks. Comprehensive treatment: air brick reinstatement, chemical injection DPC, full replastering programme.
Ground Floor Flat, Harlesden — Persistent Black Mould to Bedroom
Mould to bedroom wall and ceiling. Survey confirmed condensation — under-heating, poor ventilation. PIV unit installed, extract fans fitted, mould professionally cleared. Landlord compliance documentation issued.
Commercial Unit, Harlesden High Road — Rising Damp to Shop Floor and Walls
Retail unit with wet patches to floor and lower wall junction. Survey confirmed rising damp through solid concrete floor. Slurry tanking system to walls and floor. Works completed over a weekend.
Areas covered near Harlesden
Damp Proofing Across Harlesden and Surrounding Areas
We cover Harlesden and all surrounding neighbourhoods. Select your area for local information, or call us to confirm availability.
Don’t see your area? Call 020 4542 6114 — we cover a wide area across North and North West London.
Common questions
FAQ
How much does a damp survey in Harlesden cost?
My Harlesden HMO has damp in multiple rooms — where does it start?
Can you treat damp in commercial units on Harlesden High Road?
Do you cover NW10?
Do you guarantee damp proofing work in Harlesden?
Get in touch
Book a Damp Survey in Harlesden
Speak to a CSRT-Qualified Damp Specialist
Tell us about the problem you’re seeing and your property type — we’ll confirm whether we can help and what to expect from a survey. Harlesden homeowners, buyers, and landlords all welcome.
💡 Tip: Send photos of the affected area to info@dampandmouldsolutions.co.uk — the more we can see before the survey, the faster we can advise on likely cause and solution.
Request a Survey in Harlesden
Fill in your details — same-week appointments frequently available across Harlesden.
Stop Damp at the Source in Harlesden
A proper diagnosis from a CSRT-qualified specialist before spending money on any treatment — that’s where every job starts.