Hertfordshire · London and the South East
Welwyn Garden City Thermal Roof Survey
An experienced roof surveyor for thermal roof surveys in Welwyn Garden City. More than 20 years and over 5,000 surveys across London and South East England.
- Missing or slipped insulation
- Wet areas near outlets and upstands
- Cold spots on ceilings under the roof
About our thermal roof survey in Welwyn Garden City
A thermal imaging roof survey uses a thermal camera to show differences in surface temperature across a roof. The patterns can suggest wet insulation, gaps in insulation or places where heat is getting out. The camera doesn’t see water itself, 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. If you’re worried about leaks that are hard to trace and ceilings that feel colder in places, a survey will tell you what’s going on.
Before any drone flight in a town like Welwyn Garden City, the airspace is checked on the Drone Safety Map, including zones around airports and prisons. Our drone weighs under 250g, and we’re a CAA-registered drone operator (Flyer ID and Operator ID). We take care over neighbours’ privacy. In the open category, flights stay under 120 m (400 ft) with the drone in sight.
The report works through the roof section by section, from the main slopes down to the gutters and outlets, each with a short note and a photograph. It records what’s sound as well as what is not.
- Where
- Welwyn Garden City (AL7, AL8, AL6)
- Region
- Hertfordshire
- Price
- From £400 inc. VAT
- Report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Thermal roof surveys around Welwyn Garden City
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. Where a roof is steep, tall or hard to see from ground level, drone photos and thermal images add detail. Historic houses like Digswell House, about 1.5 miles north, show how far back building in the area around Welwyn Garden City goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material.
Take a building like Peartree Primary School: a view from above covers a wide roof far faster than walking it. If you look after a shop, office or commercial unit, for example near Howard Centre, large commercial roofs are frequently easiest to see from the air or with a thermal camera.
Welwyn Garden City is in Hertfordshire. Anywhere in Welwyn Garden City, we can carry out thermal roof surveys at your property. Welwyn Garden City is one of the places in Hertfordshire where we work. You can also see our page for London.
Surveys in AL7, AL8 and AL6 are booked the same way as anywhere else. We cover properties on Church Road, Station Road and Lynmouth Road. You’ll find Welwyn Garden City on the B195 and A1000, so it is easy for us to get to. Neighbouring places we cover for thermal roof surveys include Hatfield Hyde (1 mile south), Letty Green (3 miles south-east), West End (3 miles south), Essendon (3 miles south-east) and Staines Green (3 miles east). Within a short drive, we also cover Watford (13 miles south-west), Hemel Hempstead (12 miles west), Stevenage (8 miles north), St Albans (7 miles south-west), Harpenden (7 miles west) and Hitchin (11 miles north). Welwyn Garden City is among the bigger towns we cover in Hertfordshire.
Local landmarks in Welwyn Garden City
We work in homes and buildings around Stanborough Park, Sir Frederic Osborn School and The Bakehouse pub. For rail, the closest station is Welwyn Garden City station, about 0.5 miles west of the centre. A little further out are The Bunker at Hatfield Police Station (2.9 miles south-west) and Queen Elizabeth II Hospital (1.1 miles south). For a walk, there is Lemsford Springs.
What you can safely check yourself
Keep a simple record: when leaks happen, ground-level photos and any past roof work. Share it with us as you book and it will help the survey.
During heavy rain, look at the gutters from the ground or a window. Water spilling over the edge can be a sign of a blockage or a gutter that has dropped.
What we can’t see
No survey can tell you everything, and it’s better to know them up front. Keep these in mind:
- What’s inside walls or under coverings, without opening up
- Whether the deck or roof structure is strong enough
- Seeing water directly, as the camera shows temperature, not moisture
If you’re not sure which survey you need, phone 07833 053749 or use the contact form and we’ll give you a straight answer. What a survey covers and does not.
What this survey covers
- Commercial roofs
- Flat roofs
- Insulated roof spaces
- Pitched roof slopes
- Ceilings below the roof
- Loft conversions
Why act early in Welwyn Garden City
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. Around Welwyn Garden City, water from a roof defect often goes unseen for a while, soaking loft insulation, wall tops and timbers. By the time it shows inside, the job has grown.
All our prices include VAT. Prices start from £400, including VAT. You will know the exact price before you book.
Why choose Independent Roof Survey in Welwyn Garden City
- Two decades and more of roof surveys
- Customer satisfaction of 98%
- Professional indemnity and public liability insurance
- Plain-English reports with photos
Read what a roof survey costs or two real surveys.
Places near Welwyn Garden City
What else we do in Welwyn Garden City
Common roof problems in Welwyn Garden City
Unexplained damp is one of the main reasons people ask for thermal imaging. Water can travel under a roof covering or along timbers before it shows inside. The camera helps narrow the search.
We’re often asked to look at:
- Damp patches with no obvious cause
- Ceilings that feel colder in places
- Areas losing heat at the eaves and junctions
- Wet insulation beneath the membrane
If you live in an older home near Church Of Saint Francis Of Assisi, tall stacks and steep slopes are easier to judge with close-up aerial photos than from the pavement.
Before you book anyone
- Is there a chance to talk the report through?
- Which viewpoints they use to see the roof
- What exactly goes into their report
- How soon the report will arrive
Welwyn Garden City: your questions answered
Is there anything to prepare before you come to Welwyn Garden City?
Clear the way to the loft hatch if there is one, and let us know about any leaks, stains or past repairs. Let us know about parking and access in Welwyn Garden City too.
How do I find out if my home in Welwyn Garden City is listed?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. The answer matters most when a change of material is on the cards.
Is thermal imaging included in your surveys?
Thermal imaging is included in our Premium Survey, from £400. That also includes a full inspection, a drone inspection where applicable, structural analysis and a same-day report.
I live in a flat. Can you survey the roof?
Yes. A shared roof needs access agreed first, with the building owner or managing agent. Let us know about it when booking and we’ll explain what’s needed.
Is it a structural engineer’s report?
No. We are roof surveyors, not structural engineers. We will recommend an engineer if we see signs that call for one.
What’s in the survey report?
Written findings with photographs, explaining the condition of the roof, any defects and our recommendations, by urgency where it matters. Standard adds moisture detection and a structural check; Premium adds thermal imaging, drone inspection where it applies and structural analysis.
How soon will I get the report?
Each package has its own report time. Basic: within 48 hours. Standard: 24 to 48 hours. Premium: the same day. If you have a deadline, such as an exchange date, tell us when you book.
How the survey 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 roughly 1–2 hours for a house, with bigger or more complicated roofs taking longer. For a home in Welwyn Garden City, the main things we need are a way into the loft, a route to the back garden and somewhere to park. Someone needs to let us in, so let us know who that will be.
- First we go over the roof, the problem you’ve noticed and the conditions forecast for the visit.
- We carry out a visual inspection of the roof from wherever it can be seen safely.
- Thermal images are taken to show differences in surface temperature.
- Areas that look unusual on the camera are checked with moisture readings where possible.
- The report sets out the images, what they suggest and what we recommend.
Before we arrive
- Point out any leaks or damp patches
- Jot down any questions you want answered
- If you’re buying, let the agent know when we’re coming
Arrange a survey
If you have photos of the roof, send them over. Pictures from the ground or a window are fine. To send them or to book, call 07833 053749 or drop us an email.
Advice
For landlords and managing agents
Freeholders and residents’ companies use a roof report to plan and budget, with the most urgent items set out first.
If you own several properties, you can book surveys for several addresses. To discuss a number of properties, phone 07833 053749 or email us.