Hertfordshire · London and the South East
Thermal imaging roof survey in Westmill, Hertfordshire
Thermal imaging to find moisture and heat loss patterns in a roof for Westmill, from an experienced roof surveyor. You get a clear written report with photos.
- Leaks far from where the stain appears
- Thin or uneven insulation in the roof
- Wet insulation beneath the membrane
Tips from our surveys
A few practical points come up again and again on our surveys. They apply to most roofs:
- Talk to us about the weather when booking
- Keep a record of when stains appear
- Photograph damp patches with the date
- Keep the heating on as usual before a heat loss survey
Premium Surveys include an in-person consultation, giving you the chance to talk through the images and findings. There is a 12-month follow-up too.
Have small defects in the covering fixed early. Water that gets under a covering can spread a long way before it shows.
Thermal roof survey in Westmill
A thermal camera can help when the cause of damp isn’t 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. We combine the images with a visual inspection and moisture readings, so the findings don’t rely on the camera alone. We are frequently asked to look into heat escaping through the roof and stains that keep coming back, on ceilings below the roof, commercial roofs and pitched roof slopes.
Villages like Westmill often stand in open country, where wind can be strong. A small drone cannot fly safely in strong 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.
Findings are set out part by part, from the main slopes down to the gutters and outlets, with a note and a photo for each point. You will see the good as well as the bad.
- Place
- Westmill (SG9)
- Wider area
- Hertfordshire
- Prices
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- When we survey
- Weekdays and weekends
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
Different roofs, different checks
GRP fibreglass roofs
GRP roofs are laid over timber boards, so trapped moisture can affect the deck. The camera can help show where to look.
Single-ply and EPDM roofs
Thin membranes can show patterns from the layers beneath. Shiny surfaces can reflect heat, so we take care reading the images.
When you need someone else
Some things cannot be seen without opening up the roof, and that sets some limits:
- Seeing water directly, as the camera shows temperature, not moisture
- An energy rating for the building
- Structural calculations, which need a structural engineer
If in doubt, call 07833 053749 or send us an email and we will recommend the right survey before you book. What a survey covers and does not.
Roofs we survey in Westmill
- Pitched roof slopes
- Commercial roofs
- Loft conversions
- Ceilings below the roof
- Insulated roof spaces
- Flat roofs
Places near Westmill
What else we do in Westmill
How the survey works
It is useful to start with what’s prompted the survey: a purchase, a leak, a storm, new work or simply peace of mind. That way we can focus on what matters to you. The visit usually takes roughly 1–2 hours at most homes, and more on a big or complicated roof. Somewhere as small as Westmill, access is frequently the only tricky part. Mention any outbuildings, barns or garages you want included, and anything about the roof you already know. Visits can be on weekdays, Saturdays or Sundays.
- We talk through the roof, any damp or leaks, and the weather expected on the day.
- We look at the roof from the ground, from windows and from the roof itself where it is safe.
- 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, photographs and our recommendations.
Getting ready for the survey
- Check pets are kept safely away
- Mention any parking restrictions on your street
- Find any records of previous roof work
Booking a survey
To book a survey, phone 07833 053749 or drop us an email with the address and what you’d like to know about the roof. We’ll confirm the price before you book.
Advice
Drones, thermal imaging and Westmill roofs
In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Steep or complicated roofs are frequently hard to see from the ground, which is where photos from the air and thermal images help. An older home may be listed, or stand in a conservation area. Historic England’s list shows listed buildings, and the council can say whether a street is in a conservation area. In either case, a change of roofing material may need consent.
If you live in an older home near Parish Church of St Mary the Virgin, thin or patchy insulation under an old roof often shows up clearly on a thermal image.
Westmill is about 7 miles east of Stevenage, in Hertfordshire. We survey roofs in Westmill as part of our work across London and the South East. Across Hertfordshire, we cover Westmill and the places around it. We also survey roofs in Chelmsford.
Surveys in SG9 are booked the same way as anywhere else. Neighbouring places we cover for thermal roof surveys include Aspenden (1 mile north), Buntingford (1 mile north), Hay Street (2 miles east), Layston (2 miles north) and Braughing (2 miles south-east). We also work in nearby towns such as Stevenage (7 miles west), Bishop's Stortford (8 miles south-east), Welwyn Garden City (12 miles south-west), Hitchin (11 miles west), Hoddesdon (12 miles south) and Cheshunt (15 miles south).
Near you in Westmill
Typical jobs here are in homes near The Sword In Hand Public House, among other places. Other landmarks nearby include Brent Pelham (4.5 miles north-east).
DIY checks: what’s safe
Keep a simple record: dates of leaks, photos from ground level and any work done on the roof. Send it with your enquiry and it will help the survey.
A DIY look is useful, but it is not a survey. From the ground, valleys, flashings and the backs of chimneys are often out of sight, and those are details a survey looks at closely.
FAQs for Westmill
Do you cover smaller places like Westmill?
Yes, smaller places are covered as well as towns. We cover the whole of London and South East England. Let us know about access, parking and anything unusual about getting there when you book.
Does a conservation area affect roof work in Westmill?
We can’t confirm that for you, but Historic England’s list and your council can. A change of roofing material may need consent in either case.
Which days do you carry out surveys?
We survey on any day from Monday to Sunday, during the day, which suits people who work during the week. Let us know your preferred days as you book.
How experienced are you?
More than 5,000 surveys over 20+ years, across London and South East England.
Is thermal imaging useful on pitched roofs?
It can be useful, though pitched roofs are normally harder to read. Slates and tiles over a ventilated space can mask what’s below, so we also look from the loft where it’s safe.
What’s in the survey report?
You get our findings in writing, part by part, with photos. The most urgent items are made clear.
How much does a thermal roof survey cost?
It’s part of the Premium Survey, from £400. You also get an in-person consultation and a 12-month follow-up. Larger commercial roofs are quoted for their size.
When to book a survey in Westmill
Not every roof problem shows on the surface. Trapped moisture, missing insulation and hidden heat loss are three examples. Thermal imaging gives us another way to look for them.
It is worth booking a survey if you’ve seen:
- Damp where roofs meet walls and chimneys
- Damp around roof outlets and upstands
- Damp that repairs haven’t cured
- Leaks that are hard to trace
Anyone responsible for a site like Freman College will know that big roofs are where photos from the air and thermal images show the most at once.
What to check before booking
- When you will get the report
- Whether you get a written report with photos
- Are they insured for the work?
- Will they check the loft as well as the outside?