Hertfordshire · London and the South East
Thermal Roof Survey in Harmer Green
Need a thermal roof survey in Harmer Green? We can help, with findings in writing and pictures to back them up. Book a weekday or weekend visit.
- Water getting in at parapets and stacks
- Areas losing heat at the eaves and junctions
- Leaks far from where the stain appears
About our thermal roof survey in Harmer Green
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. Pitched roofs with slates or tiles are frequently harder to read, because of the air space beneath, so we combine the camera with an inspection from the loft where there is safe access. Common reasons to book are leaks that are hard to trace and damp around roof outlets and upstands, across ceilings below the roof, pitched roof slopes and flat roofs.
Somewhere as small as Harmer Green, older roofs are often steep and partly hidden by trees or outbuildings. A drone and a thermal camera each give a view you can’t get from the ground. Weather and airspace are looked at ahead of the visit. Older roofs with steep slopes and tall chimneys are where the extra view helps most.
After the visit, you get a report with photographs, sent by email. It sets out the condition of the roof, any defects and our written recommendations.
- Place
- Harmer Green (AL6)
- Region
- Hertfordshire
- Prices
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- When we survey
- Weekdays, Saturdays and Sundays
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Before and after the survey
Small things make a difference. Our tips:
- Ask us about the forecast if rain is expected
- Keep a record of when stains appear
- Heat the home normally on the days before
- Keep outlets and gutters clear to stop water sitting
Buyers can use the findings when talking to the seller or agent. What you do with it is up to you, whether that is asking for work or discussing the price.
Check loft insulation covers the whole area and hasn’t been disturbed. Insulation is often moved when people work in the loft space.
How it works
Expect us to ask a few questions before we start, about the roof’s history, any leaks and past repairs. The inspection then takes about 1–2 hours for a house, and about three to four hours for a commercial roof. Rural addresses near Harmer Green can be hard to find from a postcode alone, so a few directions are welcome. After that, the survey runs as it would anywhere.
- First we go over the roof, the problem you’ve noticed and the conditions forecast for the visit.
- We look at the roof from ground level, from windows and from the roof itself where it is safe.
- We take thermal images of the roof to pick up temperature patterns.
- We check the patterns that stand out with moisture readings where there is safe access.
- You get a report with thermal images, photos and our recommendations.
Before the survey
- Dig out any old roof reports or invoices
- If it is not your property yet, arrange access through the agent
- Clear the way to the loft hatch
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. Otherwise, simply call 07833 053749 or send us an email whenever suits you.
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What we look for on each type of roof
Pitched slate and tile roofs
Thermal images of a pitched roof can still show heat loss patterns and some damp areas. The report explains what the images can tell you and what they can’t.
Felt and asphalt flat roofs
Water under felt or asphalt can stay hidden for years. Thermal imaging helps suggest where it is, when the conditions allow.
For landlords and managing agents
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 with less disruption.
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photos included.
Harmer Green: your questions answered
Is Harmer Green in the area you cover?
Yes, Harmer Green is within the area we cover. We survey roofs across London and the South East. You can phone 07833 053749 or send us an email with the address and some details, and we’ll talk through which survey suits.
Is Harmer Green within the area you cover?
Yes. Harmer Green is within the area we cover, which takes in towns, villages and rural addresses. We work right across London and South East England. Just mention lanes, gates or anything else about the route when you book.
When does the report arrive?
It depends on the package: Basic within 48 hours, Standard in 24–48 hours and Premium the same day. The report is emailed to you.
What’s in the survey report?
It works through the roof part by part, in writing and with photos, and ends with what we recommend. The most urgent items are made clear.
I live in a flat. Can you survey the roof?
Yes, as long as access is agreed. Roofs over flats are often shared, so the building owner or managing agent needs to agree access. We inspect only the parts we are allowed to reach.
Which survey includes thermal imaging?
Thermal imaging is included in our Premium Survey, from £400. That also includes a full inspection, a drone inspection where it applies, structural analysis and a same-day report.
What does a thermal roof survey show?
A thermal camera shows differences in surface temperature. The patterns can suggest wet insulation, gaps in insulation or heat escaping. Findings are checked with moisture readings.
Leave it or get it looked at?
Buyers get extra information from thermal images that the eye can miss. Finding hidden moisture before exchange gives you facts to raise with the seller. In a place like Harmer Green, a barn or garage roof left to fail puts whatever is inside at risk. It’s worth including them in a survey before a winter does the damage.
Prices start from £400, including VAT. Basic starts from £150, Standard from £250 and Premium from £400, VAT included.
Why choose Independent Roof Survey in Harmer Green
- Over 20 years’ experience
- 98% of customers satisfied
- We hold a CAA Flyer ID and Operator ID
- Weekday and weekend surveys
See what a roof survey costs and two real surveys.
Nearby places to Harmer Green
What else we do in Harmer Green
Thermal roof surveys in Harmer Green: local notes
Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles, with flat-roofed extensions, dormers and garages common everywhere. Steep or complicated roofs are often hard to see from ground level, which is where aerial photos and thermal images help. The wider area around Harmer Green has a long history of building, with Digswell House about 1.5 miles south-west. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first.
If you look after a building such as Oaklands Primary School, a drone or thermal camera can show a large roof in a single visit. If yours is one of the older homes in the streets near Digswell Village Church, steep roofs, tall chimneys and hidden valleys can be hard to see from ground level, and that’s where a view from above or with a thermal imager helps. For businesses in and around places like Howard Centre, thermal images can show trapped moisture across a wide commercial roof.
Harmer Green is about 2 miles north of Welwyn Garden City, in Hertfordshire. Surveys in Harmer Green work the same way as everywhere we cover: a careful inspection, photographs and a written report. Our area takes in places right across Hertfordshire, from the larger towns to small villages. London is in our area too.
Thermal roof surveys in AL6 are booked the same way as anywhere else. If you’re just outside Harmer Green, we cover Burnham Green (1 mile east), Tewin Wood (1 mile east), Oaklands (1 mile north-west), Bull's Green (1 mile north-east) and Digswell (1 mile south-west). We also work in nearby towns like Watford (15 miles south-west), Hemel Hempstead (13 miles south-west), Stevenage (5 miles north), St Albans (8 miles south-west), Bishop's Stortford (15 miles east) and Harpenden (7 miles west).
Near you in Harmer Green
Typical jobs here are in homes near Danesbury Park, Monk's Walk School and The White Horse Public House. Harmer Green’s nearest station is Welwyn North station, roughly 0.8 miles south-west. A little further out are Hertford Castle (4.9 miles south-east) and Queen Elizabeth II Hospital (3.4 miles south). Green spaces nearby include Tewin Orchard and Hopkyns Wood.
What affects the cost of thermal roof surveys
We confirm the price for the job before booking. This is what makes a difference:
- The height of the building and how the roof can safely be seen
- How complicated the roof is, with its valleys, chimneys and parapets
- The number of roofs, including extensions and garages
- How big the roof is
All our prices include VAT. Our price is from £400, including VAT. You will know the price for the job before booking.
Getting in touch
These details help when you contact us:
- Where the property is, with the postcode
- When you need the report by
- Anything about access we should know
- The style of property, from a terrace to a block
To book a survey, ring 07833 053749 or drop us an email and let us know the address and what’s prompted the survey. We’ll confirm the price before you book.