Greater London · London and the South East
Thermal Roof Survey in Isleworth
Find out what’s going on with the roof before you spend money on it. Thermal roof surveys in Isleworth.
- Patches of heat loss across the roof
- Moisture around outlets and upstands
- Stains that keep coming back
Do you need a thermal roof survey in Isleworth?
People frequently book a thermal survey when a damp patch has no obvious cause. Water can travel under a roof covering or along timbers before it shows inside. Temperature patterns can help narrow down where to look.
People normally book a survey when they’ve noticed something like this:
- Stains that keep coming back
- Wet insulation beneath the membrane
- Water getting in at parapets and stacks
- Damp around roof outlets and upstands
For a London address like Isleworth, it is useful to know about controlled parking before the day, along with any off-street space.
Choosing a roof surveyor
- Whether you get a written report with photos
- What happens after the report arrives
- How long the report takes to arrive
- Whether VAT is in the quoted price
Thermal roof surveys for homes and businesses in Isleworth
A thermal survey can point to places where heat is escaping through the roof. Missing or slipped insulation and gaps at the eaves frequently show up as temperature differences. It works best when the building is heated and it is colder outside. The report shows the images and explains what they may mean. It isn’t an energy rating or a heat loss calculation. Common reasons to book are water getting in at parapets and stacks and cold spots on ceilings under the roof, on loft conversions, ceilings below the roof and insulated roof spaces.
Flying in London takes more checking than most places: there are flight restriction zones around Heathrow, London City and London Heliport, and restricted areas over Hyde Park, the City of London and the Isle of Dogs. Before a drone goes up in Isleworth, the address is checked against all of them, and where permission is needed, the flight waits for it.
We write the report in plain English, so it makes sense without any roofing background. Each point is backed by a photo where possible.
- Location
- Isleworth (TW7, TW1, TW3)
- Region
- Greater London
- Cost
- From £400 inc. VAT
- Your report
- A written report with photos, by email
- When we survey
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Drones, thermal imaging and Isleworth roofs
Isleworth is about 2 miles from the edge of the flight restriction zone around Heathrow Airport. Where the drone is part of the survey, the exact boundary is checked for the address first. Within a mile and a half or so of Isleworth there are several hotels, 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.
For businesses in and around places like Treaty Centre, large commercial roofs are frequently easiest to see by drone or thermal camera. Anyone responsible for a site like St Mary's Catholic Primary School will know that thermal images can show where wet insulation sits under a big flat roof.
Isleworth is about 2 miles north of Twickenham, in Greater London. Isleworth is part of the area we cover and the surrounding area as part of our work across London and the South East. Isleworth is one of the towns and villages in Greater London we cover. London is in our area too.
All of TW7, TW1 and TW3 is within our area for thermal roof surveys. You will find streets like Upper Square, London Road and Shire Horse Way, all of which we cover. Neighbouring places we cover for thermal roof surveys include Woodlands (1 mile west), St Margarets (1 mile south-east), Ivybridge (1 mile south-west), Spring Grove (1 mile north-west) and Hounslow (1 mile west). Further out, we also cover London (10 miles east), City of Westminster (8 miles east), Marylebone (9 miles north-east), Kensington (6 miles east), St Pancras (10 miles north-east) and Shoreditch (12 miles east).
Around Isleworth
Around Isleworth, our work takes us to homes and buildings near The George Inn, Kneller Hall Junior School and Gumley House RC Convent School and the streets around them. Isleworth has its own railway station: Isleworth station. Other landmarks nearby include West Middlesex University Hospital (less than half a mile north-east) and Museum of Army Music (1.4 miles south-west). For a walk, there is Richmond Hill and Kew Gardens Lake.
Before and after the survey
A little preparation and a few simple habits help, both for the survey and for the roof itself. Our tips:
- Keep the heating on as usual before a heat loss survey
- Talk to us about the weather when booking
- Keep dated photos of any marks on ceilings
- Check the loft can be reached safely
If the images suggest moisture that cannot be confirmed, we’ll say what would help next, for example electronic leak detection or a roofer opening up a small section.
Keep outlets and gutters clear so water drains off the roof quickly. Less standing water means less chance of it getting under the covering.
Your questions about thermal roof surveys in Isleworth
Is my home in Isleworth listed or in a conservation area?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it is in a conservation area. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
Can parking be tricky for a visit in Isleworth?
London parking needs a little planning, so let us know about permits, bays or a driveway as you book. The visit is then planned around what’s available.
Do you cover Isleworth for thermal roof surveys?
Yes. We carry out thermal roof surveys in Isleworth.
Are you structural engineers?
No. Visible signs such as deflection or sagging are recorded, but calculations and an engineer’s opinion are outside what we do. If one is needed, the report says so.
How long will you be at the property?
Time on site depends on the roof; most visits take an hour or two for most homes, plus time to check any thermal findings with moisture readings. The report is sent afterwards by email.
When does the report arrive?
Report times are set by the package. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. Mention any deadline as you book.
How experienced are you?
Over 20 years and more than 5,000 surveys.
Nearby places to Isleworth
Also in Isleworth
How it works
On the day, we start by asking what you’ve noticed and what you need to know. After that, we look at everything we can see safely, from ground level, from windows, in the loft space and by drone where it applies. The survey usually takes about one to two hours on an ordinary house; commercial roofs usually need 3–4 hours. For a visit in Isleworth, parking and access are the things to plan: let us know about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. We then look at what can be seen safely from ground level, windows, the loft and, where it is safe, the roof itself.
- We talk through the roof, any damp or leaks, and the weather expected on the day.
- The roof is inspected visually from safe viewpoints.
- A thermal camera records how the surface temperature varies across the roof.
- We check the patterns that stand out with moisture readings where there is safe access.
- We write up the thermal images alongside ordinary photos and recommendations.
Preparing for the visit
- If you are buying, check with the agent that we can get in
- Point out any leaks or damp patches
- For a flat or shared roof, check access with the freeholder or managing agent
Booking a survey
Once you know what you need, ring 07833 053749 or send us an email. From there it’s a case of choosing a package, agreeing the price and fixing a day.
Read more
What affects the cost of thermal roof surveys
All our prices include VAT. The things that change the price are:
- How complicated the roof is, with its valleys, chimneys and parapets
- Extensions, dormers and garages with roofs of their own
- Whether it is a home or a commercial building
- The size of the roof
Every price we give includes VAT. Thermal roof survey starts from £400, including VAT. You’ll know the price for your survey before you book.
Getting in touch
Here’s what helps us most when you contact us:
- Anything about access we should know
- Where any leaks, stains or damp patches show inside
- The style of property, from a terrace to a block
- Any photos you have, taken from ground level or a window
A quick phone call is typically the easiest start: phone 07833 053749 or email us and we’ll ask a few questions about the roof. You will have a price before anything is arranged.
DIY checks: what’s safe
During heavy rain, look at the gutters from ground level or a window. Overflowing water can point to a blockage or a sagging run.
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it.
Why get it checked now?
Trapped water can harm decks, timbers and ceilings the longer it stays. Looking now, while the damage may still be limited, keeps more options open. A hidden valley or parapet gutter on a London house can hold water for weeks before anyone notices. When the stain finally shows, the damage underneath is often older than it looks.
Thermal roof survey starts from £400, including VAT. Basic starts from £150, Standard from £250 and Premium from £400, VAT included, and we’ll tell you which fits.
Why us?
- Plain-English reports with photos
- Surveys on weekdays, Saturdays and Sundays
- Drone flown under a CAA Flyer ID and Operator ID
- Prices that include VAT
Read our cost guide and our case studies.