Hertfordshire · London and the South East
Thermal imaging roof survey in The Folly, Hertfordshire
Thermal imaging to find moisture and heat loss patterns in a roof across The Folly, with drones and thermal imaging where they help. Get in touch for a price.
- Leaks far from where the stain appears
- Cold areas below the roof
- Wet areas near outlets and upstands
Rented homes, blocks and businesses
With a portfolio of properties, surveys can be booked for more than one address. To discuss a number of properties, ring 07833 053749 or send us an email.
Landlords, agents and building managers in The Folly and across Hertfordshire can book any of our surveys. For a price for a let property or a block, phone 07833 053749 or drop us an email.
How a thermal roof survey works in The Folly
A thermal survey isn’t a quick fix for every roof problem. Sun, shade, reflective surfaces and wind can all change what the camera shows. We back up the images with moisture readings and a careful look at the roof. The report is clear about what the images show and what they don’t. Where something can’t be confirmed, we say what would help next. Common reasons to book are water getting in at parapets and stacks and thin or uneven insulation in the roof, across flat roofs, ceilings below the roof and loft conversions.
Older buildings in small places like The Folly may be listed or in a conservation area. A look from the air or with a thermal camera does not touch the roof, so it is a gentle way to see the condition of an old roof, before anyone decides what work it needs. Changes that affect a listed building’s special interest need listed building consent, so check with the council first.
The report does not just list problems. It explains what we found, why it matters and what we recommend.
- Location
- The Folly (AL4)
- Region
- Hertfordshire
- Prices
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Thermal roof surveys around The Folly
Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles, and flat-roofed additions turn up almost everywhere. Steep or complicated roofs are often hard to see from the ground, which is where photos from the air and thermal images help. The Folly is about 2 miles from the edge of the flight restriction zone around Luton Airport. If your survey includes the drone, the exact boundary is checked for the address first.
Take an older house close to St Helen's Church: thin or patchy insulation under an old roof frequently shows up clearly on a thermal image. Shaw's Corner lies about 2 miles north-east, so building around The Folly goes back a long way. For older roofs nearby, a look from the air or with a thermal camera is a hands-off way to check condition.
The Folly is about 2 miles east of Harpenden, in Hertfordshire. The Folly is one of many places we visit across Hertfordshire, for houses, flats and commercial buildings. Across Hertfordshire, we cover The Folly and the places around it. You can also see our page for London.
We survey roofs across the AL4 postcode area for thermal roof surveys and the streets around it. Whether your property is on Folly Fields and Lower Luton Road or anywhere close by, we can help. We also cover the places around The Folly: Lea Valley (1 mile west), Amwell (1 mile south), Mackerye End (1 mile north-west), Blackmore End (1 mile north) and Batford (1 mile west). Further out, we also cover Watford (11 miles south), Hemel Hempstead (8 miles south-west), Stevenage (8 miles north-east), St Albans (5 miles south), Welwyn Garden City (5 miles east) and Hitchin (9 miles north).
Near you in The Folly
We work in homes and buildings around Sir John Lawes School and The Cherry Trees pub and the streets around them. The nearest railway station is Harpenden station, about 2 miles west. Other landmarks nearby include St Albans City Hospital (4.2 miles south) and Harpenden Museum (2.2 miles west). For a walk, there’s Wheathampstead Local Nature Reserve.
Common questions in The Folly
Is my home in The Folly listed or in a conservation area?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. It matters most if you’re planning to re-roof in a different material.
Can you fly a drone over a roof in The Folly?
That depends on where the roof is and on the weather. The flight restriction zone around Luton Airport comes within about 2 miles of The Folly. The exact boundary is checked for each address before any flight, and a roof inside it needs permission before we fly. A small drone can’t fly safely in high wind or heavy rain, though the rest of the survey goes ahead either way.
Will I get photos?
Yes. Photos are part of every report, so you can see each point for yourself.
Which survey includes thermal imaging?
Thermal imaging is included in our Premium Survey, from £400. The Premium Survey also covers a full inspection, drone inspection where it applies, structural analysis and a report on the same day.
Do you climb onto every roof?
Only when it is safe. Some roofs are too steep or fragile to walk on safely. Safe viewpoints, the loft and a drone where it applies let us see the rest.
Do you work in The Folly?
Yes. The Folly is part of the area we cover, and the service is the same as everywhere else we work.
Is this an asbestos survey?
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.
Also near The Folly
Also in The Folly
Practical tips
A little preparation and a few simple habits help, both for the survey and for the roof itself. Some pointers:
- Keep the report to compare against after any repair
- Heat the home normally on the days before
- Clear a path to the loft hatch before we arrive
- Keep a record of when stains appear
We note the weather and surface conditions, and how they may have affected the results. That way you know how much weight to give each finding.
Watch for new damp patches on ceilings beneath the roof. Catching a leak early stops insulation getting soaked.
What we do, step by step
On the day, we start by asking what you’ve noticed and what you want to find out. After that, we check everything we can see safely. Most surveys take between one and two hours at a typical home, though large, tall or awkward roofs take more time. In a hamlet or village like The Folly, a postcode doesn’t always lead to the right gate, so a few directions, or a note of a nearby landmark, help us arrive on time. The visit itself is the same as anywhere else.
- We talk through the roof, any damp or leaks, and the weather expected on the day.
- The roof is inspected visually from safe viewpoints.
- A thermal camera records how the surface temperature varies across the roof.
- Areas that look unusual on the camera are checked with moisture readings where possible.
- You get a report with thermal images, photos and our recommendations.
How to prepare
- Check pets are kept safely away
- Let us know about parking before the day
- Show us where any leaks or stains appear
Booking a survey
Unsure which package suits your roof? The easiest way is to phone 07833 053749 or use the contact form and describe the roof and why you want it surveyed. We will talk you through the options and what they cost.
Related advice
What this survey cannot tell you
A survey is a close look at the roof, but it cannot do everything. Its limits include:
- Insulation values or heat loss calculations
- Structural calculations, which need a structural engineer
- Hidden layers that need to be opened up to check
If in doubt, call 07833 053749 or drop us an email and we’ll recommend the right survey. The full list of what we check.
What we look at
- Flat roofs
- Commercial roofs
- Loft conversions
- Pitched roof slopes
- Insulated roof spaces
- Ceilings below the roof
What we are asked to look at in The Folly
Some buyers want extra detail before they commit to a purchase. The Premium Survey brings thermal imaging and a drone inspection where it applies, with a report the same day, which suits a purchase that is moving quickly.
Typical things we are asked to look at include:
- Stains that keep coming back
- Thin or uneven insulation in the roof
- Wet insulation beneath the membrane
- Damp around chimneys and parapets
Anyone responsible for a site like St Helen's Church of England Primary School will know that a drone or thermal camera can show a large roof in a single visit.
Questions to ask before you book
- What the survey won’t cover
- Whether you can ask questions once you have the report
- Whether VAT is in the quoted price
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
What you can safely check yourself
During heavy rain, look at the gutters from ground level or a window. Water spilling over the edge can be a sign of a blockage or a gutter that has dropped.
Keep a simple record: when leaks happen, ground-level photos and any past roof work. Send it with your enquiry, as it helps us focus the survey.