Surrey · London and the South East
Thermal imaging roof survey in South Merstham, Surrey
Thermal imaging to find moisture and heat loss patterns in a roof in South Merstham, carried out by an experienced roof surveyor. You get a clear written report with photos.
- Areas losing heat at the eaves and junctions
- Damp where roofs meet walls and chimneys
- Damp patches with no obvious cause
Thermal roof survey in South Merstham: what you get
A thermal survey can point to places where heat is escaping through the roof. Missing or slipped insulation and gaps at the eaves often show up as temperature differences. It works best when the building is heated and it is colder outside. The report shows the images and explains what they may mean. We do not give energy ratings or heat loss calculations. If you’ve noticed patches of heat loss across the roof and thin or uneven insulation in the roof, we can find out what’s behind it, whatever the roof.
Places like South Merstham can be near small airfields or other airspace restrictions, so the Drone Safety Map is checked before any flight. Open ground can mean stronger wind, which also affects whether a small drone can fly. Neighbours’ privacy is part of planning each flight, along with the airspace and the weather.
Where we cannot see part of the roof, the report says so. You will know exactly what was inspected and what wasn’t.
- Place
- South Merstham (RH1)
- Region
- Surrey
- Prices
- From £400 inc. VAT
- Report
- A written report with photos, by email
- When we survey
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
The survey, step by step
We check the roof from outside and, where it’s relevant and there is safe access, from inside the roof space too. In the loft, the signs we look for are staining, damp, daylight and sagging. The whole visit usually takes an hour or two for most homes, plus time to check any thermal findings with moisture readings. With a bit of garden around a house, as there frequently is around South Merstham, the roof can be viewed from several angles. Mention any side of the property we can’t get to. The loft, where there is safe access, completes the picture.
- We start by discussing the roof, any signs of damp and how the weather may affect the images.
- The roof is inspected visually from safe viewpoints.
- A thermal camera records how the surface temperature varies across the roof.
- We check the patterns that stand out with moisture readings where there’s safe access.
- You get a report with thermal images, photos and our recommendations.
Getting ready for the survey
- Make sure pets are kept safely away
- Make a note of anything you’d like us to look at
- Let us know about parking before the day
Booking a survey
If you’re buying, it is useful to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. For any other survey, just call 07833 053749 or email us when you’re ready.
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Tips from our surveys
Most of what helps is simple and safe from the ground. A few suggestions:
- Don’t switch the heating off ahead of the visit
- Keep the report to compare against after any repair
- Keep dated photos of any marks on ceilings
- Clear leaves from outlets and gutters each autumn
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.
Check loft insulation covers the whole area and hasn’t been disturbed. Insulation is frequently moved when people work in the roof space.
For landlords and managing agents
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out with the most urgent first where relevant.
Letting agents can arrange access with tenants. We survey on weekdays and at weekends, which helps when tenants work during the week.
Also near South Merstham
Other services in South Merstham
How the survey changes by roof type
GRP fibreglass roofs
Cracks in GRP can let water into the boards beneath. We combine a visual check of cracks with the thermal images around them.
Single-ply and EPDM roofs
Single-ply PVC, TPO and EPDM roofs are often laid over insulation boards. Wet boards can show as temperature differences on the images.
South Merstham questions
Does a conservation area affect roof work in South Merstham?
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 drone flying allowed in South Merstham?
The answer turns on the exact location and the conditions on the day. The flight restriction zone around Redhill Aerodrome comes within about 1 mile of South Merstham. The exact boundary is checked for each address before any flight, and a roof inside it needs permission before we fly. Strong wind or heavy rain also stops a small drone flying, though the rest of the survey goes ahead either way.
Are you structural engineers?
No. We’re roof surveyors, not structural engineers, and it doesn’t include calculations. If we see signs that need an engineer’s opinion, we’ll recommend one.
What does a thermal roof survey show?
It records surface temperature across the roof. Differences can suggest wet areas, missing insulation or heat loss, and we check them with moisture readings.
Can you check my loft insulation with a thermal camera?
Thermal images can suggest where heat is escaping and where insulation may be missing. We don’t give energy ratings or heat loss calculations, but the images show where improvements may help.
Do you carry professional indemnity insurance?
Every survey is covered by professional indemnity and public liability insurance.
What do I do with the report?
You will get the report by email. With Standard there is a follow-up consultation; with Premium, an in-person consultation.
Thermal roof surveys in South Merstham: local notes
Before planning roof work on an older home, find out whether it is listed or in a conservation area. Changes that affect a listed building’s special interest need listed building consent, and councils can also use Article 4 directions to control changes in conservation areas. South Merstham is about 1 mile from the edge of the flight restriction zone around Redhill Aerodrome. If the drone is used for your survey, we check the exact boundary for the address before flying.
The streets around a church such as All Saints' are frequently among the oldest in a place, and if you own one of the older houses nearby, steep roofs, tall chimneys and hidden valleys can be hard to see from the ground, and that’s where a view from the air or with a thermal camera helps. For site and facilities teams at buildings such as Merstham Primary School, a view from above covers a wide roof far faster than walking it. For businesses in and around places such as The Belfry, big, flat commercial roofs are where close-up aerial shots and thermal images help most.
South Merstham is about 2 miles north-east of Redhill, in Surrey. From houses to flats and shops in South Merstham, the roof can be surveyed on a weekday or at the weekend. We cover towns and villages across Surrey, large and small. Our Crawley page covers surveys nearby.
Postcode districts we cover here for thermal roof surveys: RH1. Whether your property is on Station Road South, London Road South and Station Road or anywhere close by, we can help. Neighbouring places we cover for thermal roof surveys include Merstham (1 mile north), Holmethorpe (1 mile south-west), Gatton (1 mile west), Nutfield (2 miles south-east) and Redhill (2 miles south-west). Larger places within reach include Epsom (7 miles north-west), Horley (6 miles south), Ewell (8 miles north-west), Reigate (3 miles south-west), Walton-on-Thames (14 miles north-west) and Caterham (3 miles north-east).
Around South Merstham
In South Merstham, that means homes and buildings near Merstham Park School, Nutfield Marshes and East Surrey College, among other places. South Merstham has its own railway station: Merstham station. Other landmarks nearby include Bletchingley Castle (2.3 miles south-east) and The Belfry (1.7 miles south-west). For a walk, there’s Colley Hill and Mercers Lake.
Can I check my roof myself?
What you can’t do safely is get up close. Roofs are fragile and slippery. That part is for a survey.
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
Why it is worth a survey now in South Merstham
Wet insulation under a flat roof doesn’t dry out on its own while the covering stays on. In time, it stops insulating properly and can damage the deck. Finding them early can mean a smaller job. In a smaller place like South Merstham, wherever a roof is exposed, a loose ridge or flashing doesn’t stay loose for long. Each storm lifts it a little further, and water follows.
Thermal roof survey starts from £400, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, with VAT included, and we’ll tell you which fits.
What you get with us
- An independent look at the roof
- Surveys seven days a week
- Prices that include VAT
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
See what a roof survey costs and two real surveys.