Hertfordshire · London and the South East
Thermal imaging roof survey in Welham Green, Hertfordshire
A careful look at the roof at your property in Welham Green, and put it all in a written report with photos.
- Possible trapped moisture under a flat roof covering
- Damp patches with no obvious cause
- Areas losing heat at the eaves and junctions
What affects the price in Welham Green
Every roof is different, so prices are confirmed before you book. This is what makes a difference:
- How big the roof is
- Features like valleys, chimneys, dormers and parapets
- Any need for thermal images or a drone flight
- The number of roofs, including extensions and garages
A Basic Survey starts from £150, with VAT included. The Standard Survey starts from £250 and the Premium Survey from £400, both including VAT. You will know the price for your survey before booking.
Getting in touch
You do not need to know any roofing terms. It is enough to let us know:
- Where water is showing inside, if it is
- Your timetable, like an exchange date
- Any photos you have, taken from the ground or a window
- Anything about access we should know
Booking is simple: just call 07833 053749 or send us an email and give us some details about the property and we will recommend the right survey. We confirm the price before anything is booked.
Thermal roof survey in Welham Green: what you get
A thermal camera can help when the cause of damp is not obvious. Water can travel some distance under a roof covering before it shows inside, and the camera can show patterns that help us follow it. The images are used alongside a visual inspection and moisture readings, so the findings don’t rely on the camera alone. If you’re worried about moisture around outlets and upstands and leaks that are hard to trace, we can find out what’s behind it.
In smaller places like Welham Green, many homes are bungalows and houses with roofs you can partly see from ground level. The parts you can’t see, like rear slopes, valleys and chimney tops, are where a drone or thermal camera adds detail. Both depend on the weather on the day, as calm, dry conditions suit both. Even so, a close-up image often shows wear on ridges and flashings that a view from ground level misses.
Report times depend on the survey you book: the Basic Survey within 48 hours, the Standard Survey in 24 to 48 hours and the Premium Survey on the same day.
- Location
- Welham Green (AL9, AL10)
- Wider area
- Hertfordshire
- Cost
- From £400 inc. VAT
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Thermal roof surveys in Welham Green: local notes
If the drone is used for your survey, the flight is checked against the Drone Safety Map first. With Hatfield House about 1.8 miles north, Welham Green sits in an area with a long building history. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first.
For an older house near a landmark such as Church of St Mary the Virgin, older roofs can be steep and hard to see from the street, which is where aerial photos and thermal images help.
Welham Green is about 2 miles south of Hatfield, in Hertfordshire. We provide thermal roof surveys for homeowners, landlords and businesses in Welham Green and nearby. Welham Green is one of the towns and villages in Hertfordshire we cover for thermal roof surveys. You can also see our page for London.
All of AL9 and AL10 is within our area for thermal roof surveys, from the main roads to the quietest streets. Whether your property is on Station Road, Old Farmhouse Mews and Vincenzo Close or anywhere close by, we can help. We also cover the places around Welham Green: North Mymms (1 mile south), Colney Heath (1 mile west), Hatfield (2 miles north), Sleapshyde (2 miles west) and Smallford (3 miles north-west). Further out, we also cover Watford (9 miles south-west), Hemel Hempstead (10 miles west), Stevenage (12 miles north), St Albans (5 miles west), Welwyn Garden City (4 miles north) and Harpenden (8 miles north-west).
Landmarks near Welham Green
Around Welham Green, our work takes us to homes and buildings near Brookmans Park, The Hope and Anchor Public House and Chancellor's School and the streets around them. There’s a railway station in Welham Green itself: Welham Green station. Nearby you will also find Queen Elizabeth II Hospital (3.5 miles north) and The Bunker at Hatfield Police Station (2.3 miles north). The countryside around Welham Green includes Gobions Wood.
Rented homes, blocks and businesses
Freeholders and residents’ companies use a roof report to plan and budget, putting the urgent items at the top.
An agent can book and manage the survey for a landlord, and the report can go to both. We agree a time with the tenant beforehand.
What happens on the day
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. The survey typically takes about one to two hours at a typical home; commercial roofs usually need 3–4 hours. In a smaller place like Welham Green, parking is seldom the issue; lanes, gates and long drives are worth mentioning. Low roofs on bungalows can frequently be seen well from ground level, and the loft shows the rest, while taller roofs may need other vantage points or the drone where it applies.
- First we discuss the roof, any damp and the forecast for the visit.
- The roof is inspected visually from safe positions.
- We take thermal images of the roof and of the loft where we can reach it.
- Patterns that stand out are checked with moisture readings.
- The report pairs each thermal image with a photo and explains what it suggests.
Getting ready for the survey
- Make a note of anything you’d like us to look at
- For flats, check roof access has been agreed
- Clear the way to the loft hatch
Arrange a survey
You can call us seven days a week. For a price or to book, phone 07833 053749 or email us.
Related advice
Why get it checked now?
Without thermal imaging, the only way to see how far water has spread is frequently to open up the roof. It helps when deciding whether to patch an area or replace the roof. Around Welham Green, leaves and moss in gutters lead to overflowing water and damp walls, particularly where trees overhang. It is easy to sort the cause early and slow to dry a damp wall.
Thermal imaging and drone inspection (where applicable) come with the Premium Survey, which starts from £400, with VAT included. We can help you choose the package that fits what you want to find out.
Why book with us
- Covered by professional indemnity and public liability insurance
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- 20+ years’ experience
- An independent look at the roof
Take a look at our cost guide or what we found on two real jobs.
Common roof problems in Welham Green
Some defects simply can’t be seen with the eye. Wet insulation, gaps in insulation and heat loss are frequently invisible from outside. A thermal camera adds another way of finding them.
Look out for signs like these:
- Damp where roofs meet walls and chimneys
- Thin or uneven insulation in the roof
- Possible trapped moisture under a flat roof covering
- Cold spots on ceilings under the roof
If you look after a building such as St Mary's Church of England Primary School, big roofs are where close-up aerial shots and thermal images show the most at once.
Before booking anyone
- Which viewpoints they use to see the roof
- Is VAT included in the price?
- What insurance they carry
- Whether you can ask questions once you have the report
Nearby places to Welham Green
Also in Welham Green
Welham Green questions
Is Welham Green within the area you cover?
Yes. Welham Green is within the area we cover, which takes in towns, villages and rural addresses. Our area covers London and South East England. Let us know about access, parking and anything unusual about getting there when you book.
How do I find out if my home in Welham Green is listed?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s in a conservation area. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
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. We check what it shows with moisture readings.
Is this an asbestos survey?
No. We don’t carry out asbestos surveys or testing. If we see materials that could contain asbestos, such as cement roof sheets or soffits on buildings from before 2000, we flag them.
How do I book a survey in Welham Green?
The quickest way is to phone 07833 053749 or email us. Give us the address and a few details about the roof. Surveys run seven days a week.
Will you go up on the roof?
Not always. Safety comes first, and fragile or steep roofs can’t always be walked on. Safe viewpoints, the loft and a drone where it applies let us see the rest, and the report records anything we couldn’t see.
Does the weather affect a thermal survey?
Conditions on the day affect the results. A sunny day beforehand, a dry surface and calm air all help. Rain, wind and heavy cloud can weaken the patterns, so we discuss the forecast when booking.
What this survey can’t tell you
We only report whatever is safely visible on the day, so there are some things a survey cannot cover:
- An energy rating for the building
- A structural engineer’s assessment
- Hidden layers that need to be opened up to check
If you are not sure which survey you need, phone 07833 053749 or email us and we will give you a straight answer. What our survey covers.
Roofs we survey in Welham Green
- Pitched roof slopes
- Commercial roofs
- Loft conversions
- Flat roofs
- Ceilings below the roof
- Insulated roof spaces