Greater London · London and the South East
Thermal Roof Survey in North Harrow
Thermal roof surveys in North Harrow from an independent, experienced roof surveyor. Over 5,000 surveys and 20+ years behind us across London and the South East.
- Patches of heat loss across the roof
- Wet areas near outlets and upstands
- Damp where roofs meet walls and chimneys
Thermal roof surveys in North Harrow: local notes
Historic houses such as Headstone Manor, about 0.8 miles north-east, show how far back building in the area around North Harrow goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first. If your survey includes the drone, the flight is checked against the Drone Safety Map first.
If you look after a shop, office or commercial unit, for instance near St. George's Shopping Centre, big, flat commercial roofs are where aerial photos and thermal images help most. Anyone responsible for a site like Longfield Primary School will know that a drone or thermal camera can show a large roof in a single visit. Controlled parking zones are common in London, so mention any permit rules for North Harrow.
North Harrow is about 1 mile north-west of Harrow, in Greater London. We survey roofs in North Harrow and the surrounding area across London and South East England. Across Greater London, we cover North Harrow. You can also see our page for London.
Here we cover the HA2, HA1 and HA5 postcode area for thermal roof surveys. Local streets include The Avenue, Pinner Road and Durham Road, all of which we cover. Other places close to North Harrow include Rayners Lane (1 mile south-west), Harrow (1 mile south-east), Roxbourne (1 mile south-west), Eastcote (1 mile west) and Greenhill (1 mile east). We also work in nearby towns like London (13 miles south-east), City of Westminster (10 miles south-east), Marylebone (10 miles south-east), Kensington (9 miles south-east), St Pancras (11 miles east) and Shoreditch (13 miles east).
What’s near North Harrow
We work in homes and buildings around Nower Hill High School, Heathfield School and Headstone Manor Recreation Ground and the streets around them. The nearest railway station is Harrow-on-the-Hill station, about 1.2 miles east of the centre. A little further out are St. George's Shopping Centre (1 mile east) and Hilfield Castle (5 miles north). Not far away are Northala Fields and Islip Manor Meadows.
Thermal roof survey in North Harrow
A thermal imaging roof survey uses a thermal camera to show differences in surface temperature across a roof. The patterns can suggest wet insulation, gaps in insulation or places where heat is getting out. The camera does not see water itself, so we check what it shows with moisture readings. It comes as part of our Premium Survey, from £400. The report also notes the conditions on the day, since they affect what the camera can show. We are often asked to look into damp where roofs meet walls and chimneys and wet insulation beneath the membrane, across insulated roof spaces, ceilings below the roof and loft conversions.
In London’s terraces and conversions, roofs are packed close together, which makes care around neighbours part of the job. We take care to focus on the roof we’ve been asked to look at. Mention access, height and anything unusual about the building when booking. The extra view helps most on steep slopes, tall stacks and rear additions.
The report is yours to share with whoever needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent, whichever applies.
- Where
- North Harrow (HA2, HA1, HA5)
- Region
- Greater London
- Cost
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Surveys for landlords and agents in North Harrow
We also survey roofs for businesses and commercial landlords. Larger roofs take longer, so they’re priced to suit.
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on.
Practical tips
From years of surveys, a few habits stand out as worth the effort:
- Remember the conditions on the day affect the results
- Leave the roof to people with safe access
- Do not switch the heating off before the visit
- Make sure the loft can be reached safely
After the visit, we put the thermal images, photographs and moisture readings into one report. Each image is explained in plain words, with our recommendations. With a Premium Survey, you get the report the same day.
Watch for new damp patches on ceilings beneath the roof. Catching a leak early stops insulation getting soaked.
Why act early in North Harrow
Wet insulation under a flat roof does not 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. London’s older roofs frequently have bitumen felt underlay or none at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left unchecked, water soaks into timber and plaster and the damage spreads.
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. You’ll know the figure before booking.
Why book us in North Harrow
- We hold a CAA Flyer ID and Operator ID
- Every finding written up with photos
- 5,000+ roofs surveyed
- An independent look at the roof
Take a look at what a roof survey costs and what we found on two real jobs.
What happens on the day
Every visit follows the same pattern: we hear what you’ve seen, look at the roof from every safe viewpoint, photograph what we find and make notes for the report. Most visits take roughly 1–2 hours for a house, while a commercial roof takes nearer three to four hours. 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, let us know when booking.
- We start by discussing the roof, any signs of damp and how the weather may affect the images.
- The roof is inspected visually from safe viewpoints.
- We take thermal images of the roof to pick up temperature patterns.
- Any patterns of interest are checked with moisture readings where we can reach them.
- You get a report with thermal images, photos and our recommendations.
How to prepare
- Move anything stored under the loft hatch
- For flats, make sure roof access has been agreed
- Find any records of previous roof work
Booking a survey
A quick phone call is usually the easiest start: call 07833 053749 or use the contact form and we will ask a few questions about the roof. You’ll have a price before anything is arranged.
Advice
More services for North Harrow
Your questions about thermal roof surveys in North Harrow
How do I find out if my home in North Harrow is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Is parking a problem for a survey in North Harrow?
It can be, so it helps to tell us about permits, visitor bays or off-street space as you book. That way the visit can be planned around it.
Can you inspect my roof with a drone?
Where it helps and it’s safe, yes. Whether we can fly on the day depends on the weather and the airspace rules, including flight restriction zones near airports. We hold a CAA Flyer ID and Operator ID.
Is thermal imaging included in your surveys?
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.
Does thermal imaging detect leaks directly?
Not directly. It shows temperature, and wet materials often behave differently from dry ones. We confirm what it suggests with moisture readings.
Is this a RICS survey?
No. This is a survey of the roof only, so it is not a RICS Level 2 or Level 3 survey. Many buyers have both.
Do you climb onto every roof?
Only when it is safe. Safe viewpoints, the roof space and a drone where applicable cover most of what’s needed, and anything out of sight is recorded in the report.
How we price thermal roof surveys
To price your survey, we look at:
- The type of building, from a house to a block or an office
- Building height and the viewpoints available
- Any need for thermal images or a drone flight
- The roof’s overall size
Simple, low roofs take less time to survey than tall or complicated ones, and the package matters as well. The price is always agreed first.
What to let us know when you contact us
Here’s what helps us most when you get in touch:
- Where water is showing inside, if it is
- Your postcode, so we can check access and travel
- Pictures of the roof from a safe spot, if you have them
- What made you get in touch
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply ring 07833 053749 or email us whenever suits you.
Different roofs, different checks
Pitched slate and tile roofs
Inside the loft space, thermal images can help with damp around stacks, valleys and roof windows. We check any patterns with moisture readings.
Felt and asphalt flat roofs
Felt and asphalt roofs often show wet areas as patches that differ from the rest. We check those patches with moisture readings.