Infrared thermal imaging to detect heat loss and hidden defects








Infrared cameras reveal what a normal inspection cannot see. Our thermal imaging specialists carry out detailed infrared surveys across Dover, from homes near the port to properties by the River Dour and the White Cliffs. The scan is non-invasive and non-destructive, with cameras that detect surface temperature changes to 0.1C, so we can map heat loss, draught paths and hidden moisture without opening up walls or lifting floors.
Dover's housing stock gives thermal imaging a clear job to do. homedata.co.uk records show an average sold price of £284,000 in April 2026, while home.co.uk showed an average asking price of £305,544 on 20 May 2026, so even a modest loss of heat can matter over a long heating season. With 544 property sales in the last 12 months and a large share of older homes across the district, our surveys help buyers and owners see where comfort is being lost and where savings can start.

A thermal survey picks up heat escaping through roofs, walls, floors, windows and doors. Our surveyors also look for missing or collapsed cavity wall insulation, cold bridging at junctions, air leakage around frames and service penetrations, plus moisture patterns that can point to hidden damp. In Dover, that matters in older streets near Town and Castle where draughts and uneven insulation often sit behind a tidy finish.
The same infrared scan can flag underfloor heating faults and electrical hotspots, which gives it a broader role than a simple energy check. Homes at Guston Heights, Military Road and Poulton Close can still show cold spots at seals, vents and junctions, even when they are newer than the terraces closer to the centre. A clean plastered wall can look fine to the eye, yet the thermal image may show exactly where the heat is leaking.

Dover district housing has a profile that suits thermal analysis. Around 75% of properties were built before 1980, and the stock is split mainly between semi-detached houses or bungalows at 31.0% and terraced houses or bungalows at 27.9%, with detached homes also forming a significant share. That mix means many homes were built to older insulation standards, long before modern expectations for loft depth, airtightness and wall performance came in.
Older buildings in Dover often rely on traditional construction details that behave differently from modern insulated fabric. Brick walls, tiled roofs and retrofit upgrades are common across the district, yet those later improvements can leave gaps, bridges and weak points that a thermal camera will expose. The population sits at around 116,410, with 50,552 households, so even small faults repeated across many homes can add up to a lot of wasted energy.
Local context matters as well. Dover's port brings salt air and wind exposure, the River Dour adds a flood and moisture backdrop, and coastal weather can drive cold air into cracks that stay hidden during a standard visual survey. That is why our thermal imaging specialists look carefully at junctions, rooflines and openings in areas such as Tower Hamlets, St. Radigunds and Mid Town Dover, where older fabric and changing weather patterns can combine to create colder rooms and higher bills.
A good thermal report makes heat loss visible in a way that is easy to act on. In a poor-performing home, around 25% of heat can escape through the roof, about 35% through the walls and roughly 15% through the windows, so the biggest losses are often where owners least expect them. Across Dover, that can mean a simple loft top-up or draught sealing job delivers more comfort than a costly cosmetic upgrade.
Energy efficiency gains also feed into long-term value. homedata.co.uk shows Dover's average sold price at £284,000, with detached homes at £448,829, semi-detached at £300,996, terraced at £238,810 and flats at £147,750, while home.co.uk listed an average asking price of £305,544 in May 2026. When our thermal imaging specialists highlight a weak roof edge on a terrace or a leaking window junction in a flat near the port, the fix can support a better EPC path and reduce wasted heating over the season.

Start with a quick quote through our Dover thermographic page. We confirm the property type, the likely survey length and the best timing for the weather.
Thermal contrast is strongest from October to March. We look for a day with at least a 10C difference between the inside and outside, which gives the clearest image set.
Heating should be on for at least 2 hours before we arrive. That helps the fabric stabilise, so the images show real losses rather than a cold-start reading.
Our surveyors complete external and internal infrared scans, usually in 1-2 hours depending on property size. Dover's coastal wind and exposed elevations are checked with care.
Each frame is reviewed and annotated, with cold spots, leaks, moisture patterns and hotspots explained in plain English. We separate true thermal faults from reflections or solar gain.
You get a report with thermal images and practical recommendations, so you can plan loft insulation, draught proofing, repair work or further specialist checks where needed.
Thermal images use a colour scale rather than a visible photograph, so blue and purple usually show cooler surfaces while red, orange and white indicate warmer areas. In a Dover terrace near the centre, a band of cold colour around a window head can show air leakage, while a bright strip along a ceiling line may point to missing loft insulation. The image only becomes useful once it is read alongside the building form and the outside weather on the day.
False readings need to be handled properly. Reflections from glass, sun on south-facing walls, wind gusts off the Channel and recent rain can all shift the surface temperature without proving a defect. Our surveyors annotate each image so you can see where a result is meaningful and where the reading needs context, especially in coastal parts of Dover where weather changes quickly and the same wall can look different an hour later.
Temperature differences matter more than isolated colours. A small cold patch on a plasterboard ceiling can be trivial, but a long line of colder tones along a party wall junction in Town and Castle may reveal a bridging problem that keeps a room chilly all winter. We explain the pattern, the likely cause and the next step, so the report reads like a clear diagnosis rather than a set of mystery pictures.
Older homes across Dover often show missing loft insulation, thin insulation at wall edges and draughts around original openings. That fits the district profile, where roughly 75% of properties were built before 1980 and many homes were erected before current insulation standards became normal practice. In semi-detached streets and terraces, our thermal imaging specialists often find heat escaping at the loft hatch, chimney breast, bay window and floor-to-wall junction.
Coastal exposure adds another layer. Properties nearer the port or the White Cliffs can suffer from persistent wind washing, while the River Dour brings a moisture backdrop that can show up as cold staining or damp patches on thermal images. Newer homes at Guston Heights, Military Road and Poulton Close can also reveal issues, usually at junctions, seals and services, where workmanship or later alterations allow warm air to escape and condensation to build.

A thermal survey can detect heat loss, missing insulation, draughts, cold bridging, moisture patterns, damp ingress, underfloor heating faults and electrical hotspots. Our surveyors use infrared imaging to show temperature differences that the eye cannot see. In Dover, that often helps with older terraces, coastal properties and newer homes with weak seals at openings.
Our Dover thermographic surveys start from £300. The final price depends on property size, layout and the amount of thermal imaging needed, so a flat in Military Road will usually take less time than a larger detached home near Guston Heights. Against an average sold price of £284,000 in the district, the survey is a modest step that can point to useful savings.
October to March gives the strongest thermal contrast, which makes the images clearer. We also look for at least a 10C difference between the inside and outside temperature, so the scan shows real heat flow rather than a flat reading. Dover's coastal weather can change fast, so we choose the day with care.
Most surveys take 1-2 hours, depending on the size and layout of the property. A compact flat in Poulton Close may sit at the lower end of that range, while an older house with several roof levels or extensions can take longer. The report follows after analysis, with the findings explained in plain English.
Yes, thermal imaging can help identify damp patterns, moisture ingress and colder surfaces linked to water penetration. It does not replace a moisture meter or a full building survey, but it gives a strong visual clue when a patch of wall is colder than the surrounding fabric. That is useful in Dover, where the River Dour and coastal weather can make moisture behaviour more complex.
Heating should be on for at least 2 hours before the visit, and we need the property warm enough to create a clear temperature difference. Curtains, loft hatches and access points may need opening so we can scan the relevant areas, and it helps if the property is left in its normal occupied state. We confirm the practical steps when you book your Dover survey.
Yes, newer homes still benefit from thermal imaging. At Guston Heights, Military Road and Poulton Close, our surveyors can pick up air leakage, missed insulation at junctions and weak seals around services or windows. A modern finish does not always mean the heat envelope is performing as it should.
From £80
Check how a thermal report may support a better energy rating
From £400
A condition survey for conventional homes that may need a wider defects check
From £499
A fuller inspection for older, altered or more complex properties in Dover
Free
Speak to an adviser about funding a home with energy and condition concerns in mind
Dover thermographic surveys start from £300, with the final fee shaped by the size of the property and the amount of scanning required. A flat in one of the newer blocks at Military Road will usually be quicker to inspect than an older terraced home with a loft, extension and hard-to-reach corners. Because the survey is non-invasive, there is no opening up or destructive testing during the visit, which keeps the process straightforward.
The value of the report sits in what you can do next. Our thermal imaging specialists provide external and internal scans, annotated images and practical recommendations, so you can decide whether the first fix is loft insulation, draught proofing, repair to a failed seal or a follow-up inspection. For Dover homes exposed to coastal wind, the River Dour moisture backdrop or older pre-1980 fabric, the best results come from a cold, stable day with the heating already running.
Against the local market, the spend is easy to justify. homedata.co.uk records a detached average of £448,829, a semi-detached average of £300,996 and a terraced average of £238,810 in Dover, while home.co.uk listed current asking prices at £305,544 on 20 May 2026. A thermal survey shows where heat is leaking now, so you can target the right upgrade before another winter drives the bills higher.
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Infrared thermal imaging to detect heat loss and hidden defects
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Homemove is a trading name of HM Haus Group Ltd (Company No. 13873779, registered in England & Wales). Homemove Mortgages Ltd (Company No. 15947693) is an Appointed Representative of TMG Direct Limited, trading as TMG Mortgage Network, which is authorised and regulated by the Financial Conduct Authority (FRN 786245). Homemove Mortgages Ltd is entered on the FCA Register as an Appointed Representative (FRN 1022429). You can check registrations at NewRegister or by calling 0800 111 6768.