Greater London · London and the South East
Thermal Roof Survey in Harlesden
An experienced roof surveyor for thermal roof surveys in Harlesden. More than 20 years and over 5,000 surveys across London and South East England.
- Heat escaping through the roof
- Leaks far from where the stain appears
- Thin or uneven insulation in the roof
Why get it checked now?
Repeated repairs that don’t stop a leak are a sign the source hasn’t been traced. Thermal imaging with moisture readings can help narrow it down, instead of trying repair after repair. Blocked gutters and hoppers on London houses overflow and soak brickwork, which can lead to damp inside. A small blockage left for a few winters becomes a damp problem.
Prices start from £150, including VAT, for a Basic Survey. The Standard Survey starts from £250 and the Premium Survey from £400. You’ll know the price for the job before booking.
Why book with us
- Weekday and weekend surveys
- Insured for professional indemnity and public liability
- Every finding written up with photos
- We hold a CAA Flyer ID and Operator ID
How a thermal roof survey works in Harlesden
Our Premium Survey, from £400, brings together a full roof inspection and thermal imaging. You also get a drone inspection where applicable, structural analysis and a report on the same day. An in-person consultation and a 12-month follow-up are included too. To book, just phone 07833 053749 or drop us an email with the address and what you’ve noticed. For big commercial roofs, we quote on size and access. If you’ve noticed water that travels before it shows and damp around roof outlets and upstands, a survey will tell you what’s going on, whatever the roof.
Flying in London takes more checking than most places: restriction zones surround Heathrow, London City Airport and London Heliport, and Hyde Park, the City of London and the Isle of Dogs have restricted areas of their own. Before a drone goes up in Harlesden, the address is checked against all of them, and where permission is needed, the flight waits for it.
Most points in the report come with a picture, because a photo of a cracked flashing says more than a paragraph. If something couldn’t be seen safely, the report is clear about it.
- Location
- Harlesden (NW10, W3, NW26)
- Wider area
- Greater London
- Prices
- From £400 inc. VAT
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Landlords, agents and block managers in Harlesden
Roof problems in a rented home affect tenants as well as the building. A survey helps you spot issues early and plan the work around your tenants.
If the property is let, the agent or a tenant can let us in, at a time agreed beforehand. Surveys run on weekdays, Saturdays and Sundays, which helps when tenants work during the week.
The survey, step by step
We will ask a few questions first, such as when any problem began and what work has been done before. The inspection then takes about 1–2 hours for a house, rising to roughly 3–4 hours on a commercial building. Surveys in Harlesden can be booked for any day of the week. It helps if you can point us to a visitor permit or a nearby bay. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- We go through the roof, the problem and the weather expected on the day.
- The roof is inspected visually from safe positions.
- Thermal images are taken across the roof and, where there is safe access, in the loft.
- We take moisture readings where the images suggest a problem.
- The report pairs each thermal image with a photo and explains what it suggests.
Before we arrive
- Check pets are kept safely away
- If you are buying, check with the agent that we can get in
- Have keys ready for side gates, garages or roof access doors
Book a survey
To arrange a survey, ring 07833 053749 or drop us an email with the address and what you’d like to know about the roof. You will know the price before anything is booked.
Advice
Before and after the survey
Nothing here needs a ladder. Our suggestions:
- Photograph damp patches with the date
- Talk to us about the weather when booking
- Check outlets after heavy rain
- Leave the roof to people with safe access
If you are buying, the report gives you specific points to raise with the seller or agent. It is your decision how to use it, whether you ask for work before completion or discuss the price.
Clear outlets and gutters regularly, so water does not sit on the roof. Less standing water means less chance of it getting under the covering.
Common questions in Harlesden
Is my home in Harlesden listed or in a conservation area?
Start with Historic England’s list for listing and your council for conservation areas. It’s worth checking before planning roof work, as both can affect what’s allowed.
Can parking be tricky for a visit in Harlesden?
Sometimes, yes. If Harlesden has controlled parking where you are, a visitor permit is the easiest answer, and a driveway is even better.
Does thermal imaging detect leaks directly?
Thermal imaging shows temperature rather than water. Wet insulation holds heat longer than dry, so it can stand out, and moisture readings are used to check it.
How much does a thermal roof survey cost?
Thermal imaging is included in our Premium Survey, from £400. That also includes a full inspection, a drone inspection where it applies, structural analysis and a same-day report.
What’s in the survey report?
It explains what we saw, what it means and what we’d suggest, with photographs throughout. It also says if any part of the roof couldn’t be seen safely.
What happens after the survey?
We email you the written report with photographs and recommendations. It’s yours to share with a seller, insurer, roofer or managing agent, whichever applies.
Is it a structural engineer’s report?
No. We are experienced roof surveyors, and visible signs such as sagging are noted, but we do not provide calculations or an engineer’s opinion. The report will say if you need an engineer.
Different roofs, different checks
Felt and asphalt flat roofs
Built-up felt and asphalt roofs can hide trapped water for a long time. Thermal imaging helps suggest where it is, when the conditions allow.
GRP fibreglass roofs
GRP surfaces can be shiny, which affects thermal readings. We allow for reflections and confirm findings with moisture readings.
Towns and villages near Harlesden
What else we do in Harlesden
Prices for thermal roof surveys in Harlesden
When we price a survey, we consider:
- House, block, shop or office
- Roof area
- Any need for thermal images or a drone flight
- Extra roofs, like extensions, dormers or garages
Thermal imaging and drone inspection (where applicable) come with the Premium Survey, from £400 with VAT included. We can help you choose the package that fits what you’d like to know.
What to tell us when you contact us
A little information up front helps. Please include:
- Anything about access we should know
- The reason for the survey, such as buying, a leak or storm damage
- Your timetable, like an exchange date
- Your postcode, so we can check access and travel
If you’re buying, it’s useful to book soon after your offer is accepted, so there’s time to use the report before exchange. Otherwise, simply ring 07833 053749 or send us an email whenever suits you.
Flying and imaging in Harlesden
Where the drone is part of the survey, the flight is checked against the Drone Safety Map first. Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. A drone or thermal camera adds most on the steep, tall and hidden parts of roofs like these.
If you look after a shop, office or commercial unit, for example near London Designer Outlet, a commercial roof can be photographed from above without anyone walking on it. Anyone responsible for a site like John Keble CofE Primary School will know that big roofs are where close-up aerial shots and thermal images show the most at once. The streets around a church like Church of All Souls are frequently among the oldest in a place, and if yours is one of the older homes nearby, tall stacks and steep slopes are easier to judge with close-up aerial photos than from the pavement.
Harlesden is about 4 miles west of City of Westminster, in Greater London. Surveys in Harlesden work the same way as everywhere we cover: a careful inspection, photos and a written report. Our Greater London coverage includes Harlesden. There’s also a page for London.
Surveys in NW10, W3 and NW26 are booked the same way as anywhere else. That includes homes and businesses on Fry Road, Wood Road and Park Road. Close by, we survey roofs in College Park (1 mile south-east), Old Oak Common (1 mile south), Church End (1 mile north), Stonebridge (1 mile north-west) and Willesden Green (1 mile north-east). Within a short drive, we also cover London (7 miles east), City of Westminster (4 miles east), Marylebone (5 miles east), Kensington (3 miles south-east), St Pancras (6 miles east) and Shoreditch (7 miles east).
Near you in Harlesden
We work in homes and buildings around St Claudine's Catholic School for Girls, Royal Oak Inn and Roundwood Park, among other places. Harlesden has its own railway station: Willesden Junction station. A little further out are Central Middlesex Hospital (1 mile west) and Brent Museum and Archives (1.1 miles north-east). Not far away are Castlebar Hill and The Long Water.