Hertfordshire · London and the South East
Letty Green Thermal Roof Survey
Thermal roof surveys in Letty Green and the rest of Hertfordshire. Surveys run on weekdays, Saturdays and Sundays.
- Leaks that are hard to trace
- Ceilings that feel colder in places
- Damp patches with no obvious cause
How a thermal roof survey works in Letty Green
Thermal imaging is a useful tool, but it has limits. It shows surface temperature, and things like sun, shade, reflections and wind all affect the readings. 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 cannot be confirmed, we say what would help next. Typical surveys look at cold areas below the roof and patches of heat loss across the roof, on ceilings below the roof, pitched roof slopes and flat roofs.
Villages like Letty Green often stand in open country, where wind can be strong. A small drone cannot fly safely in high wind or heavy rain, and thermal imaging works best with little wind. We plan the journey, access and timing around the weather. If the day turns windy or wet, the visit can be moved.
After the visit, you get a photo-illustrated written report, emailed to you. It explains the condition of the roof, the defects we found and what we recommend.
- Place
- Letty Green (SG14)
- Region
- Hertfordshire
- Cost
- From £400 inc. VAT
- Your report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Drones, thermal imaging and Letty Green roofs
The wider area around Letty Green has a long history of building, with Hatfield House about 3.4 miles south-west. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs. Older houses in the South East often have slate or clay tile roofs, while many later estates have concrete tiles. Older coverings on steep or tall roofs are hard to judge from below, so close-up aerial photos and thermal images help.
If you look after a shop, office or commercial unit, for instance near Howard Centre, big, flat commercial roofs are where aerial photos and thermal images help most. If you look after a building such as Hertingfordbury Cowper Primary School, big roofs are where close-up aerial shots and thermal images show the most at once.
Letty Green is about 3 miles south-east of Welwyn Garden City, in Hertfordshire. Bookings from Letty Green are handled just like any other: get in touch, agree the price and pick a day. Letty Green is one of the places in Hertfordshire we cover. There’s also a page for London.
All of SG14 is covered for thermal roof surveys. Streets in the area include Station Road, Woolmers Lane and Chapel Lane. Other places close to Letty Green include East End Green (1 mile east), Staines Green (1 mile north-east), Hertingfordbury (1 mile north-east), Essendon (2 miles south-west) and Little Berkhamsted (2 miles south). Larger places within reach include Watford (14 miles south-west), Hemel Hempstead (14 miles west), Stevenage (9 miles north), St Albans (8 miles west), Bishop's Stortford (14 miles north-east) and Welwyn Garden City (3 miles north-west).
Near you in Letty Green
Typical jobs here are in homes near The Sele School and Panshanger Park, among other places. The nearest railway station is Hertford North station, roughly 2.2 miles north-east of the centre. Well-known places in the area include Howard Centre (3.2 miles north-west) and Mcmullen & Sons Brewery Museum (2.6 miles north-east). Not far away are Willowmead.
What you can safely check yourself
Look up at the roof after a storm, from ground level: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Do not go up yourself.
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it, which helps when we check the roof.
What we look for on each type of roof
Loft insulation
In the roof space, the camera can pick up gaps and thin areas of insulation. We inspect the loft where it can be reached safely.
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.
Signs you need a thermal roof survey in Letty Green
After a repair, some owners want to know whether the roof has dried out. Thermal images and moisture readings can suggest whether moisture is still trapped, given suitable conditions on the day.
We’re frequently asked to look at:
- Leaks that are hard to trace
- Stains that keep coming back
- Wet areas near outlets and upstands
- Possible trapped moisture under a flat roof covering
Take an older house close to St John's Church: older roofs can be steep and hard to see from the street, which is where photos from the air and thermal images help.
Before booking anyone
- What insurance they carry
- How soon the report will arrive
- Their drone registration, if they fly one
- How they’ll see the roof: from ground level, the loft, the roof or by drone
What a survey costs
Several things affect the price of a survey:
- How big the roof is
- Features like valleys, chimneys, dormers and parapets
- Building height and the viewpoints available
- How many separate roofs there are, like extensions, dormers and garages
Price depends partly on the package: from £150 for Basic, £250 for Standard and £400 for Premium, inc. VAT. The roof’s size, height and access matter as well.
What we need to know
What helps most when you contact us:
- The type of building and roof, like pitched or flat
- Your postcode, so we can check access and travel
- Access details, such as a loft hatch or a shared roof
- What’s prompted the survey
When you’re ready to go ahead, ring 07833 053749 or drop us an email. We will suggest a package, agree the price and find a date, weekday or weekend.
FAQs for Letty Green
Will you come out to Letty Green?
Yes, Letty Green is covered. We cover the whole of London and South East England, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Does a conservation area affect roof work in Letty Green?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
Can a thermal survey trace a roof leak?
It can help narrow down where water may be getting in. 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, as the camera alone cannot prove a leak.
Do you carry out surveys on Saturdays and Sundays?
Visits run seven days a week in the daytime, which suits people who work during the week. Just say which days work for you.
How long is the visit?
It normally takes roughly 1–2 hours for most homes, plus time to check any thermal findings with moisture readings. The written report follows by email.
Does this replace a RICS home survey?
No. It is a specialist roof survey, not a RICS Level 2 or Level 3 building survey. It focuses on the roof, so it sits alongside a building survey rather than replacing it.
How much does a thermal roof survey cost?
It comes with our Premium Survey, which starts from £400. The Premium Survey also covers a full inspection, drone inspection where applicable, structural analysis and a report on the same day.
Landlord and commercial surveys in Letty Green
Any of our surveys can be booked by landlords, agents and building managers in Letty Green. To discuss a property or a block, phone 07833 053749 or send us an email.
Letting agents can arrange access with tenants. Surveys run on any day of the week, which can make access easier.
What happens on the day
Once we have finished looking, we write up our findings as a report with photos. On timing, most surveys take about 1–2 hours at a house, including the thermal images, and around 3–4 hours for a commercial roof. Somewhere as small as Letty Green, access is frequently the only tricky part. Mention any outbuildings, barns or garages you want included, and anything about the roof you already know. Weekday and weekend visits are available.
- You let us know about the roof and any damp, leaks or cold rooms.
- We check the conditions and note how they may affect the images.
- We inspect the roof and take thermal images during the same visit.
- Moisture readings are used to check what the camera shows.
- The Premium report reaches you the same day, and we go through it with you in person.
Before the survey
- For flats, check roof access has been agreed
- Find any records of previous roof work
- Have any questions written down, so nothing gets missed
How to book
Prices start from £400, including VAT. The exact figure depends on the roof and the package, and you can phone 07833 053749 or use the contact form to find out.