Kent · London and the South East
Thermal Roof Survey in Longfield
Thermal roof surveys around Longfield, with findings in writing and pictures to back them up. Weekday and weekend visits available.
- Possible trapped moisture under a flat roof covering
- Water getting in at parapets and stacks
- Damp that repairs haven’t cured
Thermal roof survey in Longfield
Flat roofs over extensions, garages, flats and commercial buildings are where thermal imaging often helps most. It can show patterns that point to trapped moisture under the membrane. On pitched roofs, slates and tiles over a ventilated space can hide what’s below, so we combine the camera with an inspection from the loft where there’s safe access. We survey insulated roof spaces, flat roofs and pitched roof slopes, and people most frequently book us about moisture around outlets and upstands and possible trapped moisture under a flat roof covering.
In a small place like Longfield, open ground can mean strong wind. Strong wind or a downpour stops a small drone flying, and calm conditions also suit thermal imaging best. The visit is planned around the forecast, along with the journey and access. If the day turns windy or wet, the visit can be moved.
After the visit, you get a written report with photographs, emailed to you. It sets out the condition of the roof, any defects and our written recommendations.
- Location
- Longfield (DA3)
- Wider area
- Kent
- Prices
- From £400 inc. VAT
- Your report
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Page updated
- 27 October 2026
Longfield questions
Do you cover smaller places like Longfield?
Yes, we do. We survey roofs across London and the South East, and smaller places are part of that. The journey is planned ahead, so it is useful to know about access.
Do you cover Longfield?
Yes, Longfield is within the area we cover. Our area covers London and South East England. You can ring 07833 053749 or email us with the address and a few details.
Will I get photos?
Yes, plenty. Each finding is shown in a picture where possible, which makes the report easy to follow.
Is it a structural engineer’s report?
No. We note visible signs like sagging or deflection, but we don’t carry out calculations or give an engineer’s opinion. Where an engineer is needed, we say so in the report.
Can a thermal survey trace a roof leak?
It frequently helps show where to look. Water can travel under a covering before it shows inside, and temperature patterns can help follow it. We combine it with a visual inspection and moisture readings because the camera cannot confirm water on its own.
I live in a flat. Can you survey the roof?
Yes. Shared roofs just need a little more planning. Mention it when you contact us and we will explain what’s needed.
Can you tell me if my roof has asbestos?
No. Our report may flag materials that could contain asbestos, but confirming it is a job for a specialist asbestos surveyor. It may be present in buildings built or refurbished before 2000.
Rented homes, blocks and businesses
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 with budgets and planning.
Landlords, agents and building managers in Longfield and across Kent can book any of our surveys. For a price for a let property or a block, call 07833 053749 or use the contact form.
Drones, thermal imaging and Longfield roofs
Many older homes in Kent have handmade clay tiles, including Kent peg tiles held by pegs through two holes, and tile-hanging on their upper walls. Kent’s older buildings take in oast houses and timber-framed Wealden hall houses as well. Where a roof is steep, tall or hard to see from the ground, drone photos and thermal images add detail. About 4 miles east lies Cobham College, a reminder of how long the area around Longfield has been built on. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and the council can say whether a home is in a conservation area.
If you look after a shop, office or commercial unit, for example near Bluewater, big, flat commercial roofs are where close-up aerial shots and thermal images help most. If you live in an older home near Church of Saint Mary Magdalene, tall stacks and steep slopes are easier to judge with close-up aerial photos than from the pavement.
Longfield is about 3 miles south-west of Northfleet, in Kent. We visit Longfield as part of our work across Kent, for homes and businesses alike. Longfield is one of the towns and villages in Kent where we work. For surveys nearby, see our Maidstone page.
Postcode districts we cover here for thermal roof surveys: DA3. Streets in the area include Station Road, Main Road and Ightham Close, and we cover them all. Other places close to Longfield include Hartley (1 mile south), New Barn (1 mile east), Longfield Hill (1 mile south-east), New Ash Green (2 miles south) and Nash Street (2 miles east). Larger places within reach include Maidstone (13 miles south-east), Dartford (5 miles north-west), Sevenoaks (10 miles south-west), Gravesend (4 miles north-east), Tonbridge (14 miles south) and Northfleet (3 miles north-east).
Local landmarks in Longfield
We work in homes and buildings around Railway Tavern, Hartley Primary Academy and Rectory Meadow. Longfield has its own railway station: Longfield station. Well-known places in the area include Darent Valley Hospital (3.3 miles north-west) and Stone Castle (3.4 miles north). Open spaces near Longfield include Sawyers Lake.
What we’re asked to look at in Longfield
Buyers sometimes want more than a visual look at the roof. The Premium Survey brings thermal imaging and a drone inspection where applicable, with a report the same day, which suits a purchase that is moving quickly.
Here are some of the things we see often:
- Cold areas below the roof
- Gaps in loft insulation
- Heat escaping through the roof
- Possible trapped moisture under a flat roof covering
Take a building like Longfield Academy: a view from above covers a wide roof far faster than walking it.
Questions to ask before you book
- Whether the inside of the roof is included
- How soon the report will arrive
- How they’ll see the roof: from the ground, the loft, the roof or by drone
- How long they’ve been surveying roofs
Roof by roof
Parapets, valleys and junctions
Parapet and valley gutters can overflow inside a building. Thermal images, checked with moisture readings, can help trace it.
Felt and asphalt flat roofs
On felt and asphalt flat roofs, wet insulation can show as a temperature difference across the surface. We check those patches with moisture readings.
DIY checks: what’s safe
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date, which helps when we check the roof.
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way, and a fall can be serious. That’s where a survey comes in.
How it works
The visit has one job: to see as much of the roof as can safely be seen and record it clearly. Everything we note and photograph goes into the written report. The visit usually takes an hour or two on an ordinary house, though large, tall or awkward roofs take more time. Somewhere like Longfield needs a little journey planning: let us know about lanes, gates and parking. The roof is looked at from ground level, from windows, from the loft where there is safe access and from the roof where it is safe.
- We go through the roof, the problem and the weather expected on the day.
- We look over the roof from wherever it’s safe.
- Thermal images are taken across the roof and, where there’s safe access, in the loft.
- We take moisture readings where the images suggest a problem.
- Each image is set beside a normal photo and explained in the report.
Before the survey
- Buyers: confirm access with the estate agent or seller
- Let us know about parking near the property
- Clear the way to the loft hatch
Book a survey
If you have photos of the roof, send them over. Pictures from the ground or a window are fine; never climb up to get a better view. To send them or to book, ring 07833 053749 or email us.
Related advice
Before and after the survey
Here are a few things we’d tell any owner:
- Talk to us about the weather when booking
- Photograph damp patches with the date
- Check outlets after heavy rain
- Heat the home normally on the days before
If the images suggest moisture that cannot be confirmed, we will say what would help next, for example electronic leak detection or a roofer opening up a small section.
Have small defects in the covering fixed early. Once water gets under a membrane, it can travel far before it appears inside.