Greater London · London and the South East
Harmondsworth Thermal Roof Survey
Thermal imaging to find moisture and heat loss patterns in a roof for Harmondsworth, from an experienced roof surveyor. Every survey comes with a written report and photos.
- Wet areas near outlets and upstands
- Leaks that are hard to trace
- Heat escaping through the roof
What we look for on each type of roof
Parapets, valleys and junctions
Junctions where roofs meet walls, parapets and valleys are common places for water to get in. The camera can help show damp around these junctions.
Loft insulation
Insulation frequently gets moved during work in the loft. The camera can show where it no longer covers the ceiling.
Thermal roof surveys for homes and businesses in Harmondsworth
What a thermal camera can show depends a lot on the weather. A sunny day before the survey, a dry roof surface and little wind all help. Rain, a strong wind or heavy cloud can make the images less clear. We’ll discuss the weather with you when booking, and our report notes the conditions and how they affected what we saw. We are frequently asked to look into damp around chimneys and parapets and gaps in loft insulation, across pitched roof slopes, insulated roof spaces and ceilings below the roof.
London’s roofs are often hard to see from the street: butterfly roofs behind parapets, dormer tops and flat roofs over back additions. That’s where a view from the air or a thermal camera helps, by showing what cannot be reached safely. Weather on the day decides whether it goes ahead, in Harmondsworth as anywhere. What a thermal image shows is temperature, so anything that looks like moisture is checked with a meter.
Most points in the report come with a picture, so you can see each defect rather than just read about it. Anything out of sight on the day is listed as such.
- Location
- Harmondsworth (UB7, TW6)
- Region
- Greater London
- Prices
- From £400 inc. VAT
- Reports
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
Why get it checked now?
Thermal images can suggest the extent of wet areas without cutting into the roof. It helps when deciding whether to patch an area or replace the roof. Any roof job in Harmondsworth means planning around parking, neighbours and access. Knowing what’s needed early gives you time to plan it calmly, rather than in a rush after a leak.
The cost of a survey depends on the roof: its size, its height, how many sections it has and how it can be reached and seen safely. Prices start from £400, including VAT.
Why book with us
- Packages from £150, inc. VAT
- Surveys on weekdays, Saturdays and Sundays
- Thermal imaging and drone inspection where they help
- More than 20 years surveying roofs
Read our cost guide and our case studies.
Common questions in Harmondsworth
Can parking be tricky for a visit in Harmondsworth?
London parking needs a little planning, so let us know about permits, bays or a driveway when booking. The visit is then planned around what’s available.
Are there drone restrictions around Harmondsworth?
It depends on the exact address and the weather on the day. The flight restriction zone around Heathrow Airport covers Harmondsworth, or comes right up to its edge. Before any flight there, we ask the airport for permission, and the flight only goes ahead if it’s given. London’s airspace includes flight restriction zones around Heathrow, London City Airport and London Heliport, and restricted areas over Hyde Park, the City of London and the Isle of Dogs. Each address is checked against all of them before the drone goes up. A small drone can’t fly safely in high wind or heavy rain.
Can you give me structural calculations?
No. Our survey isn’t a structural engineer’s report. If we see signs that need an engineer’s opinion, we will recommend one.
When does the report arrive?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. All of them come by email.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years, across London and South East England.
How long is the visit?
Time on site depends on the roof; most visits take about 1–2 hours for most homes, plus time to check any thermal findings with moisture readings. The written report follows by email.
How do I book a survey in Harmondsworth?
To book, call 07833 053749 or use the contact form and let us know the address and what you’d like to know. We’ll confirm the price and agree a day with you.
The survey, step by step
We photograph the roof as we go, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available, including by drone where it’s applicable and the weather allows. A typical visit takes roughly 1–2 hours for most houses, and more on a big or complicated roof. From the street, a London terrace usually shows only its front slope or parapet, so in Harmondsworth we work round the house, using the street, the windows, the loft and any safe vantage point behind it. If other people live in the building, tell us who can let us into the shared parts.
- We start with the roof, its history and any signs of damp or heat loss.
- The weather and surface conditions are recorded.
- A full inspection and thermal imaging are carried out together.
- Moisture readings are used to check what the camera shows.
- You get the report the same day, with an in-person consultation to follow.
How to prepare
- Have keys ready for side gates, garages or roof access doors
- Buyers: confirm access with the estate agent or seller
- Keep pets inside or away from the areas we are looking at
Arrange a survey
To arrange a survey, call 07833 053749 or use the contact form with the address and what you’d like to know about the roof. You will know the price before anything is booked.
Advice
Drones, thermal imaging and Harmondsworth roofs
There are several hotels within about a mile and a half of Harmondsworth, and hotels, like offices and blocks of flats, often have flat roofs. For hotels and other commercial buildings, large roofs are where aerial photos and thermal images show the most at once. Outer London has a good many Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. If your home in Harmondsworth is one of them, bay roofs, hips and later dormers each have their own details. Where a roof is steep, tall or hard to see from the ground, drone photos and thermal images add detail.
If you look after a building such as Harmondsworth Primary School, a view from above covers a wide roof far faster than walking it. For a London address like Harmondsworth, it helps to know about controlled parking before the day.
Harmondsworth is about 1 mile south-west of West Drayton, in Greater London. Houses, flats, blocks and commercial buildings in Harmondsworth can all book thermal roof surveys. Across Greater London, we cover Harmondsworth and the places around it. We also survey roofs in London.
We cover every part of UB7 and TW6 for thermal roof surveys and the streets around it. Streets in the area include Moor Lane, Hatch Lane and High Street, all of which we cover. Other places close to Harmondsworth include Longford (1 mile south-west), Sipson (1 mile north-east), Heathrow (2 miles south-east), Harlington (2 miles east) and Stanwell (2 miles south). Within a short drive, we also cover City of Westminster (14 miles east), Marylebone (14 miles east), Kensington (12 miles east), Hampstead (14 miles east), Ruislip (7 miles north-east) and Brompton (14 miles east).
What’s near Harmondsworth
In Harmondsworth, that means homes and buildings near Harlington Community School and The Five Bells Inn. Harmondsworth’s nearest station is Heathrow Terminal 5 Rail station, about 1 mile south. Other landmarks nearby include British Airways Heritage Collection (3.5 miles north) and Harlington (1.4 miles east). Open spaces near Harmondsworth include Crane Meadows and Staines Reservoirs.
Signs you need a thermal roof survey in Harmondsworth
Not every roof problem shows on the surface. Wet insulation, gaps in insulation and heat loss are often invisible from outside. A thermal camera adds another way of finding them.
Signs worth acting on include:
- Damp that repairs haven’t cured
- Cold spots on ceilings under the roof
- Wet insulation beneath the membrane
- Water getting in at parapets and stacks
A roof leak in a hotel or guest house around Harmondsworth means lost rooms as well as repairs, so it pays to find faults before guests do.
Choosing a roof surveyor
- How they plan to inspect the roof safely
- What they won’t be able to tell you
- What happens after the report arrives
- What insurance they carry
Places near Harmondsworth
Other services in Harmondsworth
Landlord and commercial surveys in Harmondsworth
Shared roofs need a little more planning: access has to be agreed with whoever owns or manages the building. Let us know about it when booking and we will plan the survey around it.
With a portfolio of properties, you can book surveys for several addresses. To arrange surveys for several addresses, call 07833 053749 or send us an email with the addresses.
What affects the cost of thermal roof surveys
Not every roof costs the same to survey, for these reasons:
- The package you choose: Basic, Standard or Premium
- The size of the roof
- The height of the building and how the roof can be seen safely
- Extra roofs, like extensions, dormers or garages
Prices quoted always include VAT, and the written report is part of the package. Thermal roof survey starts from £400, including VAT. Where your roof sits in the range depends on its size, height and access.
What to tell us when you contact us
Getting the details right at the start saves time. It helps to include:
- What kind of property and roof it is
- Any photos you have, taken from ground level or a window
- Whether there’s a loft hatch, a shared roof or tricky access
- Your postcode, so we can check access and travel
A quick phone call is usually the easiest start: phone 07833 053749 or use the contact form, and we’ll ask about the building and what you need. The price is agreed before a date is set.