Hertfordshire · London and the South East
Tewin Wood Thermal Roof Survey
Thermal roof surveys for homes and businesses in Tewin Wood. We’ve completed more than 5,000 surveys across London and the South East.
- Wet insulation beneath the membrane
- Leaks far from where the stain appears
- Damp around chimneys and parapets
Landlord and commercial surveys in Tewin Wood
If you own several properties, you can book surveys for several addresses. To discuss a number of properties, phone 07833 053749 or drop us an email.
Landlords, agents and building managers in Tewin Wood 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.
Thermal roof survey in Tewin Wood
A thermal imaging roof survey uses a thermal camera to show differences in surface temperature across a roof. Those patterns can point to trapped moisture, missing insulation or heat escaping. It is important to know that the camera shows temperature, not water, 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 survey ceilings below the roof, commercial roofs and pitched roof slopes, and people most often book us about damp around roof outlets and upstands and damp where roofs meet walls and chimneys.
Villages like Tewin Wood frequently stand in open country, where wind can be strong. Strong wind or heavy rain stops a small drone flying, and calm conditions also suit thermal imaging best. We plan the journey, access and timing around the weather. If the day turns windy or wet, the visit can be moved.
The report doesn’t just list problems. For each finding, it explains what it is, why it matters and what we’d recommend, so you can decide what to do next.
- Location
- Tewin Wood (AL6)
- Region
- Hertfordshire
- Cost
- From £400 inc. VAT
- Reports
- Emailed report with photos and recommendations
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Why get it checked now?
Once insulation under a membrane is wet, it tends to stay wet. Over time, it insulates less well and can harm the deck. Finding the wet areas sooner keeps the work smaller. Where a roof is exposed, as many are in small places like Tewin Wood, driving rain gets into any weakness, and older walls, once damp, take a long time to dry.
Price depends partly on the package: Basic from £150, Standard from £250 or Premium from £400, all including VAT. The roof’s size, height and access matter as well.
Why us?
- Independent findings on the roof’s condition
- Two decades and more of roof surveys
- Thermal imaging and drones used where they help
- 98% customer satisfaction
Read how roof surveys are priced or what we found on two real jobs.
What we’re asked to look at in Tewin Wood
Cold rooms under a roof, or high heating bills, lead some people to ask about heat loss. Missing or slipped insulation can stand out as temperature differences, especially when it is warm inside and cold outside.
People normally book a survey after spotting something like this:
- Moisture around outlets and upstands
- Missing or slipped insulation
- Possible trapped moisture under a flat roof covering
- Heat escaping through the roof
If you look after a building like Ridgeway Academy, a drone or thermal camera can show a large roof in a single visit.
Before you book any roof surveyor
- What the report includes, and whether it has photographs
- Whether the roof space is looked at, where there is one
- Which parts of the roof they’ll actually see
- Is VAT included in the price?
How the survey works
Where it’s relevant and can be reached safely, the roof space is checked as well as the outside. In the loft, the signs we look for are staining, damp, daylight and sagging. The whole visit normally takes about 1–2 hours at a house, including the thermal images, and around 3–4 hours for a commercial roof. For a village or hamlet like Tewin Wood, the journey is planned ahead of time: let us know about lanes, gates and parking. On the day, we inspect everything that’s safely in view, inside and out.
- We start with the roof, its history and any signs of damp or heat loss.
- 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.
- You get the report the same day, with an in-person consultation to follow.
How to prepare
- Note where any stains or damp appear
- Make a note of anything you’d like us to look at
- Leave side gates unlocked
Booking a survey
Most bookings start with a short call: phone 07833 053749 or email us and we will ask a few questions about the roof. The price is agreed before a date is set.
Read more
What affects the price in Tewin Wood
What a survey costs depends on the time and equipment it needs. The main factors are:
- How many separate roofs there are, such as extensions, dormers and garages
- Height and safe access
- The size of the roof
- House, block, shop or office
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. The price is confirmed before you book.
Helping us price your survey
You don’t need to know any roofing terms. It’s enough to tell us:
- What kind of property and roof it is
- Pictures from the garden or a window, if you have them
- How the loft is reached, if there is one
- The property’s address and postcode
Photos help, if you have them. Take them safely from the ground or a window; never climb up to get a better view. To send them or to book, ring 07833 053749 or send us an email.
Tewin Wood questions
How do I find out if my home in Tewin Wood is listed?
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.
Do you cover smaller places like Tewin Wood?
We do. A small place gets exactly the same survey as a big one, with the route planned beforehand.
Can you use a thermal camera on a sloping roof?
It can show heat loss and some damp, but it has more limits there. We explain what the images can and can’t tell you, and back them up with a visual inspection and moisture readings.
Are you insured?
We hold professional indemnity and public liability insurance.
Is thermal imaging good for finding leaks?
It’s a useful tool for tracing leaks, but not the only one. The results depend on conditions on the day. Where it can’t be pinned down, the report suggests a next step, such as electronic leak detection.
Do you take photos of the roof?
Yes. Photographs are taken throughout the survey, and they go into the written report alongside our recommendations.
Do you survey roofs on blocks of flats?
Yes, once access has been agreed. Roofs over flats are often shared, so we need permission from whoever owns or manages the building. We inspect only the parts we’re allowed to reach.
Towns and villages near Tewin Wood
What else we do in Tewin Wood
Thermal roof surveys in Tewin Wood: 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. A drone or thermal camera adds most on the steep, tall and hidden parts of roofs like these. With Digswell House about 2.1 miles south-west, Tewin Wood sits in an area with a long building history. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and a listed home or one in a conservation area may need consent for changes of material.
Shop and office owners around Howard Centre may find that thermal images can show trapped moisture across a wide commercial roof.
Tewin Wood is about 3 miles north-east of Welwyn Garden City, in Hertfordshire. We visit Tewin Wood as part of our work across Hertfordshire, for houses, flats and commercial buildings. Tewin Wood is one of the places in Hertfordshire we cover. Our London page covers surveys nearby.
Surveys in AL6 work the same way as everywhere else we cover. You will find streets such as Cowpers Way, Desborough Drive and Firs Walk. We also cover Burnham Green (1 mile north-west), Bull's Green (1 mile north), Harmer Green (1 mile west), Tewin (1 mile south) and Datchworth (1 mile north). Within a short drive, we also cover Watford (15 miles south-west), Hemel Hempstead (14 miles south-west), Stevenage (5 miles north), St Albans (9 miles south-west), Bishop's Stortford (14 miles east) and Welwyn Garden City (3 miles south-west).
Landmarks near Tewin Wood
We work in homes and buildings around Belmont pub. Tewin Wood’s nearest station is Welwyn North station, roughly 1.4 miles west. A little further out are Howard Centre (2.8 miles south-west) and Hertford Castle (4.3 miles south-east). Open spaces near Tewin Wood include Tewin Orchard and Hopkyns Wood.
Useful tips for Tewin Wood property owners
A little preparation and a few simple habits help, both for the survey and for the roof itself. Some pointers:
- Remember the conditions on the day affect the results
- Don’t climb onto the roof to look for leaks yourself
- Keep a record of when stains appear
- File the images with your roof records
Buyers can use the findings when talking to the seller or agent. What you do with it is up to you, whether you ask for work before completion or discuss the price.
Have small defects in the covering fixed early. Water that gets under a covering can spread a long way before it shows.