Infrared thermal imaging to detect heat loss and hidden defects








Our thermal imaging specialists carry out detailed infrared surveys across Chorley, from PR7 streets near St Laurence's Church to newer homes at Euxton Heights and Woodland Chase. Infrared cameras read surface temperature differences to 0.1C, which lets us see heat loss, cold bridging and air leakage that stay hidden from a normal visual inspection. The survey is non-invasive and non-destructive, so we can trace problem areas without lifting floors or opening walls. That makes it a practical way to see where a home is losing warmth before repair costs start to climb.
Chorley’s housing stock makes thermal analysis especially useful. homedata.co.uk records show an average house price of £213,000 in March 2026, up 3.8% year on year, with 418 residential sales over the last year and 67.2% of properties built before 1983. That mix includes older terraces, post-war semis and newer developments in Coppull, Charnock Richard, Eccleston and Adlington, each with different heat-loss patterns. A thermal survey helps us separate a draughty loft hatch from failing cavity insulation, which matters for comfort, energy use and the next step in any upgrade plan.

£213,000
Average house price in March 2026
3.8%
12-month house price change
418
Residential sales over the last year
52,500
Dwellings in the borough
67.2%
Properties built before 1983
£341,000
Detached homes
£212,000
Semi-detached homes
£170,000
Terraced homes
£117,000
Flats and maisonettes
Using listing data from home.co.uk and property data from homedata.co.uk
Our thermal imaging specialists use infrared cameras to pick up surface temperature changes to 0.1C, so we can spot heat loss that a normal check misses. Roofs, loft hatches, cavity walls, floors and window reveals all show different patterns once the heating has been on for at least 2 hours. In a Chorley terrace near St Laurence's Church, a cold stripe along a chimney breast can point to lost insulation or a draught path. In a newer home at Euxton Heights, a patchy image may point to a gap around a service penetration rather than a major fabric fault.
The same scan can also flag hidden damp, moisture ingress, underfloor heating faults and electrical hot spots around consumer units. Around Lower Burgh Way or Dawson Road, we often see air leakage at window frames, loft hatches and floor-wall junctions because small gaps show up as clear cold bands. A thermal camera does not cut into walls, so the survey stays non-invasive and non-destructive. It gives our surveyors a precise place to look, then the report explains what needs follow-up and what can be fixed quickly.

Chorley’s housing mix explains why thermal imaging matters here. homedata.co.uk records show an average house price of £213,000 in March 2026, with 418 residential sales in the last year and a 3.8% annual rise, while 67.2% of local properties were built before 1983. That older stock includes terraces near the town centre, post-war semis in the borough and listed or period buildings close to Astley Hall and St Laurence's Church. Homes built before modern insulation standards were common often lose heat through uninsulated lofts, thin walls and weak junctions around doors and floors.
Brick and block cavity walls became common in the 20th century, but many Chorley homes still have cavities that were never filled, or were filled poorly during later upgrades. A semi-detached house can look fine from the street and still leak warmth through the party wall edge, the eaves line or the old window reveals. The borough also has clay-rich ground and a mining legacy on the northern edge of the Wigan coalfield, so small movements can open cracks that later admit draughts or moisture. Near Black Brook, the River Yarrow or Syd Brook, a cold patch may come from damp fabric rather than simple heat escape, which is where infrared imaging gives useful context.
New-build sites in the Chorley borough need checking too. Elmbrook Park in Coppull, Charnock Grove in Charnock Richard, Woodland Chase in Eccleston and Euxton Heights on the northern edge of Chorley all use modern insulation, yet airtightness gaps can still appear around roof junctions, pipework and underfloor heating loops. Redrow, Bellway, Story Homes, Taylor Wimpey, Miller Homes and Kingswood Homes are all active in the area, and a snagging-style thermal survey can highlight defects before they become expensive to chase. That is especially helpful where the home has an air source heat pump or underfloor heating, because the system can look efficient on paper while a hidden cold bridge spoils the comfort inside.
A thermal image turns wasted energy into a picture. In many homes, around 25% of heat can disappear through the roof, 35% through walls and 15% through windows, so our surveyors look for the biggest losses first and then trace the cause. In Chorley, that matters because an average detached home is £341,000, a semi-detached home is £212,000 and a terrace is £170,000, so there is real value in checking the fabric before money goes into the wrong upgrade. The camera shows which part of the envelope is performing badly, not just where the room feels cold.
A good report links the thermal pattern to practical work. That can mean topping up loft insulation, repairing missing cavity fill, sealing penetrations around extract fans or fixing a failed window seal before condensation and damp take hold. Around PR7 3TJ at Eaves Green or PR7 5QZ at Woodland Chase, newer homes may only need minor airtightness work, while an older solid-wall terrace could need a different approach entirely. Our surveyors explain the likely gain in comfort and lower energy use, then set out the next step without pushing unnecessary building work.

Choose your Chorley thermal survey and tell us about the property type, age and any areas of concern, such as loft insulation, damp patches or cold rooms.
We ask for the heating to be on for at least 2 hours before we arrive so the infrared camera has enough temperature contrast to read the fabric properly.
Our surveyor carries out external and internal scans, usually over 1-2 hours depending on the size of the home and the number of rooms.
October to March usually gives the clearest results, because cooler outside air creates stronger contrast against the heated building.
We review every image, compare room temperatures and annotate the thermal patterns so the report explains what the camera is showing.
You receive a written report with thermal photographs, defect notes and practical recommendations for repairs, insulation or further testing.
Thermal images read from cold to hot, usually blue through green, yellow, red and white, but the colours only make sense alongside the temperature difference and the material being scanned. A dark blue patch on a ceiling in a Chorley terrace near Market Street may show heat escaping through a missed loft insulation area, while a bright line at a window head can be a cold bridge rather than a broken pane. The camera sees surface temperature, not the cause itself, so our surveyors always check the pattern against the building type and the weather on the day. That avoids guesswork and keeps the report grounded in what the fabric is actually doing.
False readings can appear after strong sun, heavy rain or a sudden gust across an exposed elevation off the M61 or M65. Reflections from glazing, metal finishes and shiny tiles can also mimic hot or cold spots, which is why we never rely on one image alone. Internal scans can be affected by radiators, cooking, lighting and recently opened windows, so the timing of the visit matters. When the conditions are right, the contrast across the building makes hidden defects stand out very clearly.
Each report image is annotated so you can see the room, the location and the likely issue without needing to decode the colours yourself. We mark the exact point where the cold bridge starts, where the air leak appears and where follow-up inspection is sensible, which is useful for homes around Astley Hall, Buckshaw Village or the villages at Coppull and Eccleston. That makes the thermal survey a practical decision tool, not just a set of pictures. If a pattern looks like damp, we say so; if it looks like insulation failure, we say that too.
The most common issues depend on age. In pre-1983 homes, which make up 67.2% of Chorley’s stock, we often see cold lofts, patchy cavity wall insulation, single-glazed or early double-glazed windows and draughts around original doors. A Victorian terrace near St Laurence's Church may show heat loss through the chimney breast and rear wall, while a 1930s semi around PR7 can leak warmth where the suspended floor meets the external wall. Older repairs are not always visible from the outside, so the camera gives a much clearer view of where the fabric has weakened.
Newer homes bring a different set of patterns. At Euxton Heights, Eaves Green, Charnock Grove, Hill Top Rise and Woodland Chase, thermal images can show thermal bridging at lintels, gaps around service penetrations, uneven underfloor heating or minor workmanship issues around roof junctions. Chorley also has areas at risk from Black Brook, the River Yarrow and Syd Brook, so the colder-looking patch on a wall can sometimes be linked to moisture ingress from a gutter, a downpipe or a weathered detail rather than a major structural fault. On clay-rich ground with a mining history, movement cracks can widen enough to let draughts in, which makes a thermal check a sensible early test.

In Chorley, it can detect heat loss through roofs, walls, floors, windows and doors. It also helps us spot missing cavity wall insulation, cold bridging, damp-related cooling, air leaks, underfloor heating faults and electrical hot spots. Around older terraces near St Laurence's Church or newer homes in PR7, the camera often reveals issues that are hidden behind plaster or above ceiling level.
Our thermal imaging surveys in Chorley start from £300. The final price depends on property size, layout and how much internal scanning is needed, so a compact terrace near Market Street will usually be simpler than a large detached home in Eccleston or Adlington. The visit includes external and internal infrared scans plus a written report with annotated images.
October to March usually gives the clearest results in Chorley, because cold outside air creates stronger contrast against a heated building. We also look for at least a 10C temperature difference between inside and outside, and the heating should be on for at least 2 hours before the survey. That helps us read properties around Buckshaw Village, Coppull and the town centre with much greater clarity.
Most Chorley surveys take 1-2 hours, depending on the size of the property and how many rooms need scanning. A two-bedroom flat in Euxton Heights will usually be quicker than a larger house in Woodland Chase or a period property near Astley Hall. We then spend time analysing and annotating the images so the report is useful rather than rushed.
Yes, it can identify cold, moisture-related patterns that often sit behind damp patches, mould or condensation. In Chorley, that is useful where roof leaks, gutter defects or flood-prone areas near Black Brook, the River Yarrow or Syd Brook may have cooled the fabric. Thermal imaging does not test moisture content on its own, so we may recommend a moisture meter or further inspection where the image points to a likely source.
We ask for the heating to be on for at least 2 hours before we arrive, and windows should stay closed during that period. Access to the loft, airing cupboard and any locked or awkward rooms helps us inspect the parts of a Chorley home that often hide heat loss. If you have seen a cold patch in a semi on Lower Burgh Way or a draught around a door in Adlington Place, tell us before the visit so we can focus on it.
No, thermal imaging looks at temperature patterns and a building survey looks at the overall condition of the property. In Chorley, the two often work well together on older homes, especially where 67.2% of the stock predates 1983. A thermal survey shows where heat is escaping; a Level 3 survey looks more closely at structure, movement and deterioration.
Price on request
Check the energy rating and find upgrade priorities
Price on request
Good for standard homes and buyers wanting a broad condition review
From £499
Best for older, altered or higher-risk properties needing a deeper inspection
Price on request
Independent valuation support for equity and ownership calculations
Our thermal imaging surveys in Chorley start from £300, which makes them a focused first step before paying for insulation or repair work that may not tackle the real problem. Against an average Chorley house price of £213,000 in March 2026, a survey is a small outlay if it helps avoid chasing the wrong wall, the wrong window or the wrong patch of damp. The base service includes external and internal infrared scanning, plus a written report with annotated images and practical findings. That report is built to show where heat is leaking, why it matters and which repairs are likely to make the biggest difference.
Property type affects the fee because larger or more complex homes take longer to scan and analyse. A 1930s semi off Lower Burgh Way is usually quicker to inspect than a detached house in Eccleston, while a period property near Astley Hall or a listed building in the borough can need more care around access and interpretation. New builds at Euxton Heights, Eaves Green or Woodland Chase can also need extra time if we are checking for airtightness gaps, underfloor heating loops or snagging defects. The aim is not to charge for unnecessary detail, but to match the survey time to the building that stands in front of us.
The clearest thermal results come when the heating has been on for at least 2 hours and the temperature difference between inside and outside is at least 10C. October to March usually gives the strongest contrast in Chorley, especially after sunset when the sun has stopped warming the external walls. Once the visit is complete, we review the images, annotate the key areas and send the report after analysis rather than while we are still on site. That gives you a practical document you can use for insulation work, damp checks or a wider survey plan.
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Infrared thermal imaging to detect heat loss and hidden defects
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