Greater London · London and the South East
Thermal imaging roof survey in Northwood, Greater London
Know where you stand with the roof before you decide what to do next. Thermal roof surveys in Northwood.
- Damp patches with no obvious cause
- Damp around chimneys and parapets
- Water that travels before it shows
How a thermal roof survey works in Northwood
Thermal imaging can also show where a roof is losing heat. Gaps in loft insulation and poorly insulated areas can stand out on the images. The difference shows most clearly when it’s warm inside and cold outside. The report shows the images and explains what they may mean. It isn’t an energy rating or a heat loss calculation. Typical surveys look at heat escaping through the roof and damp patches with no obvious cause, on loft conversions, insulated roof spaces and ceilings below the roof.
Many London roofs are hidden from the pavement: valley gutters behind parapets, dormers and flat-roofed rear additions. Drone photos and thermal images can show parts of a roof that are hard to reach safely. Weather on the day decides whether it goes ahead, in Northwood as anywhere. What a thermal image shows is temperature, so anything that looks like moisture is checked with a meter.
Nothing in the report is left vague: if work is needed, the report says so clearly, along with how urgent it is.
- Location
- Northwood (HA6)
- Region
- Greater London
- Cost
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Rented homes, blocks and businesses
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on, photographs included.
A roof problem in a let property affects your tenants as well as the building. A survey helps you spot issues early and plan the work.
Can I check my roof myself?
During heavy rain, look at the gutters from ground level or a window. Water spilling over the edge can point to a blockage or a sagging run.
The one thing to avoid is getting up close. Roofs are fragile and slippery, and a fall can be serious. That part is for a survey, using safe viewpoints and a drone where it applies.
Leave it or get it looked at?
Before replacing a large flat roof, it helps to know how much of it is actually wet. Thermal imaging, checked with moisture readings, gives a clearer picture before you spend. Work on a London roof is rarely simple to arrange, with parking, neighbours and access all to think about. That is a good reason to find problems early, while there is time to plan, rather than in a rush after a leak.
A small, low roof with good viewpoints takes less time than a tall, complicated one, and the package matters as well. We will give you the figure before anything is booked.
Why choose Independent Roof Survey in Northwood
- Drone flown under a CAA Flyer ID and Operator ID
- 20+ years’ experience
- An independent look at the roof
- Professional indemnity and public liability insurance
Take a look at how roof surveys are priced and what we found on two real jobs.
Common roof problems in Northwood
Cold rooms under a roof, or high heating bills, lead some people to ask about heat loss. Gaps in loft insulation and poorly insulated roof areas can show up on the camera, particularly when there is a clear difference between inside and outside.
People normally book a survey when they’ve noticed one of these:
- Ceilings that feel colder in places
- Areas losing heat at the eaves and junctions
- Leaks far from where the stain appears
- Possible trapped moisture under a flat roof covering
Shop and office owners around Harlequin Centre may find that big, flat commercial roofs are where close-up aerial shots and thermal images help most.
Choosing a roof surveyor
- How soon the report will arrive
- Whether they hold professional indemnity and public liability insurance
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- Whether you can ask questions once you have the report
Nearby places to Northwood
What else we do in Northwood
What a thermal roof survey looks like in Northwood
Headstone Manor, about 3.3 miles south-east, is one of the historic houses in the wider area around Northwood. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and a listed home or one in a conservation area may need consent for changes of material. If the drone is used for your survey, the flight is checked against the Drone Safety Map first.
For a London address like Northwood, it’s useful to know about controlled parking before the day, along with any off-street space. For an older house near a landmark like Emmanuel Church, older roofs can be steep and hard to see from the street, which is where close-up aerial shots and thermal images help.
Northwood is about 3 miles south-east of Rickmansworth, in Greater London. If you are in Northwood, booking works exactly as it does anywhere else: a call or an email, a price, then a date. We cover towns and villages across Greater London, large and small. Our London page covers surveys nearby.
Postcode districts we cover here for thermal roof surveys: HA6. You will find streets such as Little Stream Close and Sandy Lodge Way, all of which we cover. Neighbouring places we cover for thermal roof surveys include Eastbury (1 mile north-east), Moor Park (1 mile north-west), Batchworth Heath (1 mile west), Batchworth (2 miles north-west) and Holywell (2 miles north). We also work in nearby towns such as City of Westminster (14 miles south-east), Marylebone (14 miles south-east), Kensington (12 miles south-east), St Pancras (14 miles south-east), Hampstead (11 miles south-east) and Ruislip (3 miles south).
Local landmarks in Northwood
In Northwood, that means homes and buildings near King George V Playing Fields, The Gate Public House and London School of Theology, among other places. Northwood’s nearest station is Carpenders Park station, roughly 1.7 miles north-east. Other landmarks nearby include Harlequin Centre (2.9 miles north-east) and Heath Robinson Museum (2.2 miles south-east). For a walk, there is Dews Farm Sand Pits and Tumbling Bay.
What happens on the day
The visit has one job: to look at the roof as closely as is safe and record what we find. Everything we note and photograph goes into the written report. It usually takes between one and two hours for most houses, and longer for a large or complex roof. In converted houses and mansion blocks, the loft hatch is frequently on a shared landing. If that applies to your building, it’s useful to agree access with the neighbours or the managing agent first. Otherwise, the visit in Northwood runs like any other.
- 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.
- We take moisture readings where the images suggest a problem.
- The report pairs each thermal image with a photo and explains what it suggests.
Preparing for the visit
- Find any records of previous roof work
- Tell us where we can park nearby
- Note where any stains or damp appear
Arrange a survey
When you are ready to go ahead, phone 07833 053749 or use the contact form. From there it is a case of choosing a package, agreeing the price and fixing a day, weekday or weekend.
Read more
Roof by roof
Felt and asphalt flat roofs
Felt and asphalt sit tight to the layers below, which often helps the camera pick up differences. Any patterns are checked with moisture readings.
Single-ply and EPDM roofs
Many single-ply and EPDM roofs sit on insulation boards. Wet boards can show as temperature differences on the images.
Common questions in Northwood
Will parking be an issue for a roof survey in Northwood?
Parking in Northwood, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Is my home in Northwood listed or in a conservation area?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you are planning to re-roof in a different material.
Which survey includes thermal imaging?
Our Premium Survey, from £400, includes thermal imaging. You also get an in-person consultation and a 12-month follow-up. Larger commercial roofs are quoted for their size.
Do you survey roofs on blocks of flats?
Yes. Shared roofs just need a little more planning. Mention it when you contact us and we’ll plan the survey around it.
How do I book a survey in Northwood?
It is easiest to ring 07833 053749 or drop us an email. Let us know the address and a little about the roof. We survey seven days a week.
Will I get photos?
Yes. The report includes photos of what we found, so you can see exactly what each finding refers to.
Can you inspect my roof with a drone?
Where it helps and the rules allow, yes. We hold a CAA Flyer ID and Operator ID and fly a drone under 250g, and every flight depends on the airspace and the weather.