Hertfordshire · London and the South East
Thermal imaging roof survey in Belsize, Hertfordshire
Thermal roof surveys for homes and businesses in Belsize. More than 5,000 surveys completed across London and South East England.
- Damp around roof outlets and upstands
- Damp where roofs meet walls and chimneys
- Patches of heat loss across the roof
How it works
Every visit follows the same pattern: we listen to what’s been worrying you, look at the roof from every safe viewpoint, take photos as we go and record our findings for the written report. Most visits take about 1–2 hours for most homes, plus time to check any thermal findings with moisture readings. Older rural homes like those around Belsize can have a main roof, lower lean-to roofs and outbuildings all joined together. We work round each section in turn, from the safest viewpoints.
- We talk through the roof, any damp or leaks, and the weather expected on the day.
- We look at the roof from the ground, from windows and from the roof itself where it is safe.
- Thermal images are taken to show differences in surface temperature.
- We check the patterns that stand out with moisture readings where there’s safe access.
- The report sets out the images, what they suggest and what we recommend.
Before the survey
- Tell us where we can park nearby
- If you’re buying, check with the agent that we can get in
- Keep pets out of the way during the survey
Arrange a survey
Once you know what you need, call 07833 053749 or use the contact form. From there it’s a case of choosing a package, agreeing the price and fixing a day, weekday or weekend.
Related advice
How a thermal roof survey works in Belsize
Wet insulation under a flat roof covering holds heat for longer than dry. That means a wet area can show up as a different temperature from the rest of the roof. It helps us see how far water may have spread under the covering, something you cannot usually tell from the surface. We then check those areas with moisture readings. If you’ve noticed patches of heat loss across the roof and damp around roof outlets and upstands, a survey will tell you what’s going on, on flat roofs, commercial roofs and insulated roof spaces alike.
Villages like Belsize often stand in open country, where wind can be strong. High wind or heavy rain stops a small drone flying, and calm conditions also suit thermal imaging best. We plan the journey, access and timing around the weather. A change in the forecast can mean moving the visit to another day.
The report doesn’t just list problems. It explains what we found, why it matters and what we recommend, so you can plan your next steps.
- Location
- Belsize (WD3, WD4)
- Region
- Hertfordshire
- Price
- From £400 inc. VAT
- Report
- A written report with photos, by email
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Do you need a thermal roof survey in Belsize?
Some buyers want extra detail before they commit to a purchase. The Premium Survey brings thermal imaging and a drone inspection where applicable, with a report the same day, which suits a purchase that’s moving quickly.
We are frequently asked to look at:
- Water getting in at parapets and stacks
- Patches of heat loss across the roof
- Leaks far from where the stain appears
- Wet insulation beneath the membrane
Take a building like Sarratt Church of England Primary School: thermal images can show where wet insulation sits under a big flat roof.
Before you book any roof surveyor
- Whether the roof space is looked at, where there is one
- What’s outside the scope of the survey
- Which parts of the roof they’ll actually see
- Is VAT included in the price?
How the survey changes by roof type
Pitched slate and tile roofs
Thermal images of a pitched roof can still show heat loss patterns and some damp areas. The report explains what the images can tell you and what they cannot.
Parapets, valleys and junctions
When valley or parapet gutters overflow, water can get into walls and ceilings. We use the camera and moisture readings to help follow it.
Should I look at the roof myself first?
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
Keep a simple record: dates of leaks, photos from the ground and any work done on the roof. Share it with us as you book and it will help the survey.
What a thermal roof survey looks like in Belsize
If your survey includes the drone, the flight is checked against the Drone Safety Map first. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, with flat-roofed extensions, dormers and garages common everywhere. Many roofs like these can’t be judged properly from the pavement, and that is where a view from above or a thermal image earns its place.
Chenies Manor House, about 2 miles south-west, is one of the historic houses in the wider area around Belsize. Photos from the air and thermal images let an old roof be checked without anyone disturbing it. Take an older house close to Church of St Paul: thin or patchy insulation under an old roof often shows up clearly on a thermal image.
Belsize is about 3 miles north of Chorleywood, in Hertfordshire. Houses, flats, blocks and commercial buildings in Belsize can all book thermal roof surveys. We cover towns and villages across Hertfordshire, large and small. You can also see our page for London.
Here we cover the WD3 and WD4 postcode area for thermal roof surveys. Streets in the area include Plough Lane, Bragmans Lane and Poles Hill, and we cover them all. Close by, we survey roofs in Flaunden (1 mile west), Chenies (2 miles south-west), Latimer (2 miles south-west), Chorleywood (3 miles south) and Little Chalfont (3 miles south-west). Within a short drive, we also cover Watford (5 miles south-east), Hemel Hempstead (4 miles north-east), St Albans (8 miles north-east), Welwyn Garden City (15 miles north-east), Harpenden (11 miles north-east) and Hatfield (12 miles east).
Near you in Belsize
In Belsize, that means homes and buildings near Two Brewers Inn and Kings Langley School and the streets around them. For rail, the closest station is Kings Langley station, about 2.9 miles east. Other landmarks nearby include Hemel Hempstead Hospital (4 miles north). Not far away are Sarratt Bottom nature reserve.
Also near Belsize
Also in Belsize
FAQs for Belsize
Will you come out to Belsize?
Yes, Belsize is covered. Our area covers London and the South East, from towns to the smallest villages. Longer journeys are simply planned in advance.
Is Belsize in the area you cover?
Yes, Belsize is within the area we cover. We cover the whole of London and South East England. You can ring 07833 053749 or email us with the address and some details.
What insurance do you have?
Professional indemnity and public liability insurance cover our surveys. If you need details for a managing agent or a building owner, just ask.
Does the report include photos?
Yes, every report has them. Each finding is shown in a picture where possible, so you can see what we mean.
Will the camera show exactly where the water is?
No, not on its own. It shows surface temperature, and wet areas can show up because they hold heat differently. We confirm what it suggests with moisture readings.
Can you survey at the weekend?
Surveys can be booked for any day of the week: weekdays, Saturdays and Sundays. Just let us know the days that suit you.
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.
What affects the price in Belsize
Every roof is different, so prices are confirmed before booking. These are the things that affect it:
- The type of building, from a house to a block or an office
- Features like valleys, chimneys, dormers and parapets
- How big the roof is
- The height of the building and how the roof can be seen safely
There are three survey packages: Basic from £150, Standard from £250 and Premium from £400, all inc. VAT. What your roof costs depends on its size, access and what you want to find out.
What to tell us when you get in touch
We’ll typically ask about:
- The reason for the survey, such as buying, a leak or storm damage
- Dates you are working to, like exchange
- Where water is showing inside, if it is
- Anything about access we should know
If you have photos of the roof, send them over. Take them safely from ground level or a window, and please do not climb up for a closer look. To send them or to book, phone 07833 053749 or send us an email.
What this survey cannot tell you
We only report whatever is safely visible on the day, so there are some things a survey cannot cover:
- Proving moisture from the images alone
- Reliable images in rain, strong wind or on a wet roof surface
- An energy rating for the building
Not sure which survey suits your roof? You can phone 07833 053749 or use the contact form and we will tell you. What our survey covers.
Roofs we survey in Belsize
- Loft conversions
- Ceilings below the roof
- Pitched roof slopes
- Flat roofs
- Insulated roof spaces
- Commercial roofs