Infrared thermal imaging to detect heat loss and hidden defects








Infrared scans show surface temperature differences that the eye cannot see. Our thermal imaging specialists carry out detailed thermographic surveys across Wrexham, mapping heat loss, moisture patterns and air leakage in one non-invasive visit. The camera reads surface temperature changes to 0.1C accuracy, so missing insulation, cold bridges and damp entry lines stand out clearly. That makes it far easier to pinpoint where energy is being lost.
Wrexham homes vary widely, from Ruabon red brick terraces and Victorian workers' cottages to 1960s flats and newer MMC schemes at Heol Offa, Johnstown. That mix matters, because each construction type leaks heat in a different way. Our surveys help householders in the Wrexham built-up area cut wasted energy, improve comfort in colder rooms, and focus spending on fixes that actually move the needle.

£207,000
Average House Price (homedata.co.uk)
£309,000
Detached Homes (homedata.co.uk)
£193,000
Semi-detached Homes (homedata.co.uk)
£156,000
Terraced Homes (homedata.co.uk)
£103,000
Flats and Maisonettes (homedata.co.uk)
417
Residential Sales in the Last 12 Months (homedata.co.uk)
2.3%
12-Month Price Change (homedata.co.uk)
Using listing data from home.co.uk and property data from homedata.co.uk
A good thermographic survey picks up heat loss through roofs, external walls, floors and windows. It also highlights missing or collapsed cavity wall insulation, cold bridging at lintels and junctions, and draughts around doors and frames. In Wrexham terraces near the town centre, that often shows as sharp cooler lines around chimney breasts and bay fronts. In newer homes, it can expose gaps at service penetrations or uneven insulation coverage behind plasterboard.
Our surveyors also look for hidden damp and moisture ingress, because water changes how a surface cools. That matters in parts of Wrexham built close to the River Dee and the River Gwenfro floodplains, where lower walls can hold a different thermal pattern after wet weather. Thermal imaging can also flag underfloor heating faults and electrical hotspots, which means one visit can reveal several problems at once. The camera gives clues, then our report explains which findings are worth action.

Wrexham has grown from pre-20th century industry, and that history still shapes the housing stock today. Victorian workers' cottages, older terraces and stone-fronted homes built with Cefn sandstone or Ruabon red bricks often rely on solid wall construction, so heat escapes differently than it does in later cavity wall properties. Homes in and around Wrexham General Railway Station, Hightown and older streets near the centre can also carry retrofit insulation that is incomplete at the eaves or behind plaster. That is the kind of issue a visual inspection can miss, but an infrared scan brings it into view.
homedata.co.uk records show the average Wrexham house price at £207,000 as of March 2026, with detached homes at £309,000, semi-detached homes at £193,000, terraced homes at £156,000 and flats at £103,000. Those numbers matter because the cost of fixing heat loss needs to sit against the value of the property and the type of fabric work needed. A terrace with loft gaps may need simple upgrades. A semi-detached home with a cavity insulation defect may need a different approach. The survey helps sort the quick wins from the deeper fabric problems.
Local construction methods add another layer. Wrexham was nicknamed Terracottapolis because brick, tile and terracotta manufacturing spread across the area, and that legacy left many homes with dense masonry and decorative external details that create cold bridges around reveals, quoins and lintels. Newer homes, such as the Heol Offa scheme in Johnstown with render, PV panels and EV charging points, show a different pattern again, with air leakage often tied to junctions and finishes rather than old masonry. Our thermal imaging specialists read those differences room by room, so the report reflects the actual building in front of us, not a generic template.
Thermal imaging helps turn vague energy concerns into a visible pattern. In a typical heat-loss picture, around 25% of heat escapes through the roof, 35% through walls and 15% through windows, although the exact split depends on construction and insulation quality. That is why a thermographic survey is so useful in Wrexham terraces, detached homes and post-war flats alike. It shows where heat is leaking fastest, so the first repair targets the biggest loss.
The results can support a stronger energy plan and a better EPC pathway. A loft top-up, draught sealing around doors, or a cavity wall check may deliver faster gains than a larger refurbishment, especially in homes that sit near the Wrexham Industrial Estate where long heating seasons can push bills up. Our surveyors annotate each image and identify the most practical next step, which helps homeowners avoid spending on the wrong upgrade first. The report is built around action, not theory.

Choose an appointment for a Wrexham property, from a terrace near Wrexham General Railway Station to a newer home in Johnstown.
Keep the heating on for at least 2 hours before we arrive, so the fabric reaches a steady temperature and the thermal contrast is strong.
October to March gives the clearest results, because the outside air is usually cold enough to show heat loss clearly.
We carry out external and internal infrared scans, checking roofs, walls, windows, doors and key junctions in each room.
Our surveyors compare temperature patterns, exclude false readings and annotate each finding so the cause is clear.
You get a written report with thermal images, notes on likely defects and practical recommendations for the next repair or upgrade.
Thermal images use a colour scale, usually from cold blue through green and yellow to hot red or white. A colder area does not always mean damage, but it does show a surface that is losing heat faster than the surrounding fabric. On a Wrexham terrace, that might be a patch of missing loft insulation above the front bedroom. On a 1960s flat block such as the former Hightown stock, it can point towards slab edges, balcony lines or weak junctions between floors and walls.
Not every cold patch means a defect. Sunlight on a render finish, reflections from glass, recent rain on masonry or warm pipework can all distort the image, so the context matters as much as the colour. That is especially true around the River Dee corridor or on newer elevations near Wrexham Gateway, where glazing and reflective surfaces can create misleading hotspots. Our thermal imaging specialists correct for those effects by checking the building from more than one angle and comparing internal and external readings.
The report does the translation for you. We explain what each image shows, where the temperature difference matters, and whether the pattern points to insulation loss, draughts, moisture or a plant fault. Each annotation is written in plain language, but it still stays technical enough to guide a builder, roofer or insulation installer. The aim is simple, to turn a coloured image into a clear repair list for the right part of the home.
Victorian terraces and older cottages in Wrexham often show heat loss at the roofline, chimney breasts and bay windows. Solid wall construction, local brickwork and decorative brick details can hide cold bridging at lintels and reveals, while single glazing makes the window area stand out sharply on the thermal image. In streets built from Ruabon red bricks or Cefn sandstone, the wall may look sound from the outside yet still perform poorly in winter. The camera shows where the fabric is cold, not just where it looks tired.
1960s and post-war homes can produce a different pattern. The former Hightown flats, built with factory-made concrete components, are a good example of how slab edges, joints and flat roof details can leave linear heat loss traces. Newer schemes such as Heol Offa in Johnstown are better insulated on paper, yet render cracks, poor seals around windows or gaps around service runs can still show up. Our surveyors see the full range in Wrexham, from older masonry to modern MMC, and the report always matches the construction in front of us.

A thermal imaging survey can detect heat loss through roofs, walls, floors and windows, along with missing cavity insulation, air leakage, cold bridging and some signs of hidden damp. It can also reveal underfloor heating faults and electrical hotspots where surface temperatures are abnormal. In Wrexham, that is especially useful in older terraces, the Hightown area and homes near Wrexham General Railway Station where fabric performance varies a lot from street to street.
Our thermal imaging surveys in Wrexham start from £300. The final price depends on the size of the property, access to rooms and how much scanning is needed inside and outside the home. A compact terrace near the centre will usually take less time than a larger detached house or a home with loft and outbuilding access.
October to March gives the strongest thermal contrast, so the defects stand out clearly on the infrared camera. We also look for at least a 10C difference between the inside and outside temperature, because that makes heat loss easier to read. Winter conditions around Wrexham, Johnstown and the Dee Valley usually give the cleanest results.
Most surveys take 1-2 hours, depending on property size and the number of rooms that need scanning. A terraced house in Wrexham can often be assessed more quickly than a large detached home or a property with awkward loft access. The analysis and reporting happens after the visit, once the images have been checked and annotated.
Yes, thermal imaging can help identify damp by showing cooler areas where moisture changes the surface temperature. It does not replace a moisture diagnosis, but it does reveal patterns that deserve a closer look. In Wrexham homes near the River Dee or the River Gwenfro, that extra check is useful after wet weather or where ground-floor walls keep showing a cold patch.
Keep the heating on for at least 2 hours before the appointment and leave access clear to loft hatches, key rooms and external walls. Curtains, furniture and stored items can hide the fabric, so moving a few items out of the way helps the camera pick up the wall surface. In homes across Johnstown, Hightown and the older centre, that small bit of preparation can make the report much clearer.
Yes, even newer homes can lose heat through junctions, seals and service penetrations. The Heol Offa MMC scheme in Johnstown shows how modern construction can still benefit from a thermal check, especially around render, windows and roof details. A new home may have better insulation on paper, but the camera can still pick up the weak point that is driving up bills.
From £80
Energy performance certificate to support upgrade plans
Price on request
Homebuyer report for common purchase risks
Price on request
Detailed building survey for older or altered homes
Price on request
Support for funding a purchase or energy upgrade
homedata.co.uk records show the average Wrexham house price at £207,000, with detached homes at £309,000 and flats at £103,000. That spread matters because the right survey scope depends on the fabric, access and age of the property rather than a one-size fee. Our thermal imaging surveys start from £300, which gives you an external and internal scan, image analysis and a written report with recommendations. For owners of older terraces, post-war flats or newer homes in Johnstown, the survey cost is often modest compared with the energy waste it can uncover.
The survey itself usually takes 1-2 hours, then the images are reviewed and annotated so the report reads clearly. We include the thermal photographs, temperature patterns and practical notes on what to fix first, whether that points to loft insulation, draught proofing, cavity issues or damp investigation. Homes with good thermal contrast produce the clearest output, so October to March and a 10C indoor-outdoor difference are the best conditions. Heating should be on for at least 2 hours before the visit, which helps the camera read the fabric properly.
Wrexham properties range from Victorian brick terraces to MMC homes at Heol Offa, so the price of a survey should sit alongside the kind of problem being chased. A cold bridge around a bay window on a Ruabon red brick house needs a different response from a poorly sealed opening in a modern render system. Our surveyors focus on practical recommendations that save energy without wasting money on the wrong repair. That is the real value of a thermographic survey in Wrexham, especially where local housing stock and construction methods vary so sharply.
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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.