Greater London · London and the South East
Thermal imaging roof survey in Merton, Greater London
A careful look at the roof at your property in Merton, with photographs and a written report.
- Wet areas near outlets and upstands
- Thin or uneven insulation in the roof
- Water that travels before it shows
Thermal roof surveys for homes and businesses in Merton
Thermal imaging works best in the right conditions. It helps to have a sunny day beforehand, a dry surface and calm air. Rain, wind and cloud can all make the patterns weaker. We talk through the forecast as you book, and our report notes the conditions and how they affected what we saw. If you’ve noticed damp that repairs haven’t cured and damp around roof outlets and upstands, we can find out what’s behind it, on flat roofs, ceilings below the roof and pitched roof slopes alike.
London’s roofs are frequently hard to see from the street: butterfly roofs behind parapets, dormer tops and flat roofs over back additions. That is where a view from the air or a thermal camera helps, by showing what can’t be reached safely. Weather on the day decides whether it goes ahead, in Merton as anywhere. Thermal images show surface temperature, not water itself, so findings are checked with moisture readings.
The report doesn’t just list problems. For each finding, it explains what it is, why it matters and what we’d recommend.
- Where
- Merton (SW19)
- Wider area
- Greater London
- Price
- From £400 inc. VAT
- Reports
- Written, with photos, emailed to you
- When we survey
- Weekdays, Saturdays and Sundays
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Common questions in Merton
Is my home in Merton 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. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
Is parking a problem for a survey in Merton?
Parking in Merton, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
What happens after the survey?
You receive the written report by email, with photos and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
How does a thermal imaging roof survey work?
A thermal camera shows differences in surface temperature. The patterns can suggest wet insulation, gaps in insulation or heat escaping. We check what it shows with moisture readings.
Do you climb onto every roof?
Only if it’s safe. We inspect whatever is safely visible: from ground level, from windows and vantage points, from the loft space, from the roof itself where safe and by drone where it applies. The report says if anything couldn’t be seen.
Can you survey a shared roof?
Yes. Shared roofs just need a little more planning. Let us know about it when you book and we will plan the survey around it.
Is thermal imaging useful on pitched roofs?
It can show heat loss and some damp, but it has more limits there. We explain what the images can and cannot tell you, and back them up with a visual inspection and moisture readings.
What a thermal roof survey doesn’t cover
To be straight with you, a roof survey has limits:
- The condition of timbers we cannot see
- Proving moisture from the images alone
- A structural engineer’s assessment
If in doubt, ring 07833 053749 or email us and we will point you to the right survey before booking. What a survey covers and does not.
Roof types and parts we check
- Loft conversions
- Flat roofs
- Ceilings below the roof
- Pitched roof slopes
- Insulated roof spaces
- Commercial roofs
Landlord and commercial surveys in Merton
Roof problems in a rented home affect tenants as well as the building. A survey shows what needs attention, so you can plan the work.
For blocks of flats, a roof survey helps managing agents and residents’ management companies plan ahead. The report sets out what needs attention now and what can wait, which helps when budgeting.
How it works
When we arrive, we start by asking what you’ve noticed and what you’d like to know. After that, we look at everything we can see safely. The survey typically takes about 1–2 hours for most homes, plus time to check any thermal findings with moisture readings. Many London properties are flats or terraces with no side access, so the back of the roof is often seen from upstairs windows, from inside or, where a flight is allowed, from the air. If the building has a managing agent or access rules, tell us when you book.
- First we discuss the roof, any damp and the forecast for the visit.
- We look over the roof from wherever it is safe.
- We take thermal images of the roof and of the loft where we can reach it.
- Patterns that stand out are checked with moisture readings.
- The report pairs each thermal image with a photo and explains what it suggests.
How to prepare
- Tell us about any leaks, stains or damp patches you know of
- Clear the way to the loft hatch
- Let us know about parking before the day
Book a survey
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. For any other survey, just call 07833 053749 or use the contact form when you are ready.
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What we look for on each type of roof
Parapets, valleys and junctions
Water frequently gets in where roofs meet walls, parapets or valley gutters. The camera can help show damp around these junctions.
GRP fibreglass roofs
Glossy GRP can reflect heat. We allow for reflections and confirm findings with moisture readings.
Common roof problems in Merton
On big commercial and residential flat roofs, thermal imaging helps owners plan. Patterns can point to wet areas and show which parts look sound, so we know where to take moisture readings.
Look out for signs like these:
- Damp that repairs haven’t cured
- Cold areas below the roof
- Patches of heat loss across the roof
- Wet insulation beneath the membrane
Anyone responsible for a site like Merton Abbey Primary School will know that big roofs are where photos from the air and thermal images show the most at once.
Choosing a roof surveyor
- Which parts of the roof they’ll actually see
- What follow-up you get after the report
- Their insurance cover
- Whether you get a written report with photos
Thermal roof surveys around Merton
The flight restriction zone around London Heliport in Battersea comes within about 2 miles of Merton. Where the drone is part of the survey, the exact boundary is checked for the address first. Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, frequently with hipped roofs of clay or concrete tiles. If your home in Merton is one of them, bay roofs, hips and later dormers each have their own details. Older coverings on steep or tall roofs are hard to judge from below, so close-up close-up aerial shots and thermal images help.
If you run a business near Southside Wandsworth, big, flat commercial roofs are where photos from the air and thermal images help most. Merton is in London, so parking needs planning: let us know about permits, visitor bays or off-street space when you book, as a space near the door cannot be promised.
Merton is about 1 mile south-east of Wimbledon, in Greater London. We survey roofs in Merton as part of our work across London and South East England. Across Greater London, we cover Merton. There’s also a page for London.
All of SW19 is covered for thermal roof surveys, from the main roads to the quietest streets. We cover properties on High Path, Pincott Road and Hayward Close and the roads around them. Merton is on the A24, so it’s easy for us to get to. Neighbouring places we cover for thermal roof surveys include Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). Larger places within reach include London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north-east).
Landmarks near Merton
In Merton, that means homes and buildings near The Nelson Arms, Wimbledon School of Art and Wandle Park. Merton’s nearest station is Haydons Road station, about 0.8 miles north. Other landmarks nearby include Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). Open spaces near Merton include Henman Hill and Merton Park Green Walks.
Why get it checked now?
Wet insulation under a flat roof doesn’t dry out on its own while the covering stays on. Over time, it insulates less well and can harm the deck. Finding them early can mean a smaller job. Blocked gutters and hoppers on London houses overflow and soak brickwork. A blocked outlet ignored for a winter or two can mean damp walls inside.
A small, low roof with good viewpoints takes less time than a tall, complicated one, and the package matters as well. The price is always agreed first.
Why book us in Merton
- Insured for professional indemnity and public liability
- More than 5,000 surveys completed
- Drones and thermal imaging where applicable
- Visits on any day of the week