Infrared thermal imaging to detect heat loss and hidden defects








Our thermal imaging specialists carry out detailed infrared surveys across Newport, from Victorian terraces in Pill and Caerleon cottages to newer homes at Glan Llyn and Great Milton Park. Infrared cameras pick up surface temperature changes to 0.1C accuracy, so we can see heat escaping through roof voids, wall junctions, window frames and floors that look normal to the eye. The survey is non-invasive and non-destructive, which means we inspect without opening up finishes or disturbing your home. You get clear images, plain-English explanations and practical repair priorities.
Newport's housing mix makes thermal imaging useful on both older and newer property types. homedata.co.uk records show an overall average house price of £231,000 in March 2026, up 5.3% from £219,000 in March 2025, while home.co.uk rental data puts average monthly rent at £834. With 790 recently sold properties recorded by homedata.co.uk and a population of 159,587 in 2021, there is plenty of housing built across different eras, from 1930s bay-fronted semis in Beechwood to post-war homes in Malpas and 1950s terraces in Gaer. Thermal checks help spot the defects that push up heating bills and undermine comfort.

Heat loss shows up fast when we scan homes around Lower Dock Street, St Woolos and the older streets near Caerleon. Our thermal imaging survey highlights missing loft insulation, failed cavity wall insulation, cold bridging at junctions and air leakage around doors, windows and service penetrations. We also see temperature patterns linked to underfloor heating faults, electrical hotspots and areas where warm air is escaping into roof spaces or behind plaster. The images give a clear map of where energy is being wasted.
Damp often leaves a thermal footprint long before staining becomes obvious. In Newport, that matters near the River Usk, the Ebbw and the Severn Estuary, where moisture ingress, surface water and cold internal surfaces can all sit together. A colder patch beside a chimney breast in Pill or a damp corner in Liswerry can point to bridging, ingress or ventilation problems. Thermal imaging does not replace follow-up checks, but it tells us where to look first.

Newport has a mixed housing stock, and that variety changes the way heat moves through a building. Victorian brick terraces in Pill, period cottages in Caerleon, 1930s bay-fronted semis in Beechwood, 1950s terraces in Gaer and post-war ex-council homes in Malpas all lose heat in different patterns. Older walls often have little or no insulation, while later cavity wall homes may have partial fills, gaps or settlement in the insulation. A thermal survey makes those differences visible in a way a standard visual inspection cannot.
The numbers point to a busy, changing housing market. Newport's population reached 159,587 in 2021, up from 145,700 in 2011, and the area was the second-most densely populated local authority in Wales after Cardiff. Around 56,500 households were recorded earlier in the century, with 70.5% owner-occupied, which means many homes still pass through hands that want a clearer picture of running costs before committing to upgrades. Thermal imaging helps buyers and owners see whether a property in Rogerstone, Maindee or Duffryn is leaking warmth through the building fabric.
New-build schemes also benefit from thermal checks. Glan Llyn in Llanwern, Royal Victoria Court on the former Whiteheads steelworks site and The Cedars at Great Milton Park all sit within a market that increasingly expects high insulation standards, yet even fabric-first homes can have gaps around loft hatches, party wall junctions and window reveals. Newport also has 15 conservation areas and over 400 listed buildings, including Belle Vue Park and the Town Centre, so evidence from infrared scans can support sensible repair plans before external changes are made. That matters where Article 4(2) controls affect windows, roofs and external walls.
Heat loss is easier to understand when the building surface is shown as an image rather than a guess. As a general benchmark, homes can lose around 25% of heat through the roof, 35% through walls and 15% through windows, so our thermal imaging specialists look for the hottest escape routes first. In a Newport terrace on Pill Lane or a semi near Beechwood Park, those losses often show up as bright bands, cold stripes and missing insulation zones. The result is a practical map of where energy savings are most likely.
A thermal survey also helps prioritise works that can improve comfort and EPC performance. Loft top-ups, draught sealing and cavity wall repair can often pay back faster than larger fabric changes, especially where heat loss is concentrated around common weak spots rather than the whole building. New homes at Glan Llyn may already use a fabric first approach, but even there the survey can expose thermal bridges and poorly sealed penetrations. The evidence helps owners decide which fixes to tackle first, instead of spending on cosmetic work that does little for fuel bills.

Choose your survey date through our quote form for Newport. We then confirm the property details and the type of scan needed.
For the clearest results, the heating should be on for at least 2 hours before the visit. October to March gives the strongest thermal contrast, and we aim for at least a 10C difference between inside and outside.
Our surveyor carries out external and internal infrared scans, usually in 1-2 hours depending on the size of the home. Larger properties in Caerleon or around Great Milton Park can take longer.
Each thermal image is checked for false readings caused by reflections, wind, rain or earlier solar gain. We compare warm and cold spots against the building fabric and layout.
The final report shows annotated images, the likely cause of each defect and the practical fixes we recommend. You get clear next steps rather than a sheet of unexplained colours.
We finish by highlighting the upgrades that can reduce heat loss, improve comfort and support future energy savings. That might include loft insulation, sealing work or further investigation in one part of the property.
Thermal images use colour to show surface temperature, not just what the eye can see. Cooler areas often appear blue or purple, while warmer sections move towards red, orange or white depending on the camera palette. On a house in Stow Park or a flat near Lower Dock Street, a cold patch beneath a bedroom window may point to a draught, a missing lintel insulation detail or a failed seal around the frame. The image alone is only the starting point, so we explain what each colour band means in context.
Temperature differences matter more than the colours on their own. A small patch of colder masonry on a rain-lashed elevation in Maindee may be normal surface cooling, while a repeating cold line along a floor edge in Gaer can point to a persistent thermal bridge. Reflections from shiny surfaces, direct sun on a south-facing wall or recent heavy rain can all distort readings, which is why timing and interpretation matter. We annotate the images so the cause, not just the symptom, is clear.
Good readings come from good conditions. We avoid strong sunlight, give the property enough time to warm through and then compare internal and external temperatures against the same building elements. That approach is useful in Newport, where a 1930s semi in Beechwood and a new home at Royal Victoria Court will not behave the same way. Each report explains the pattern in plain language so you can see which defects need action now and which ones need monitoring.
Older terraces in Pill and Caerleon often show missing loft insulation, uninsulated chimney breasts and air leakage at suspended timber floors. Victorian brickwork can also hide bridged cavities, blocked vents and damp patches that sit behind plaster until the camera catches the colder outline. In these homes, the thermal image often exposes heat loss around bay windows, roof junctions and patched repairs where new materials meet old fabric.
Mid-century and post-war homes in Malpas and Gaer can show blown or uneven cavity insulation, especially where later alterations have left gaps around extensions or replacement windows. Newer estates at Glan Llyn and The Cedars usually perform better, yet we still find cold bridges, poorly sealed loft hatches and warmer spots around electrical fittings or pipes. Newport's flood-risk areas, including Caerleon, Crindau, Duffryn, Goldcliff, Liswerry and Maindee, also mean we watch for damp-linked cooling patterns in lower walls and corners.

A thermal imaging survey can detect heat loss, missing insulation, cold bridging, air leakage, moisture patterns and some electrical hotspots. In Newport, we often pick up issues in older terraces, newer estates and mixed-use buildings where the outside looks sound but the internal surface temperatures tell a different story. It gives a clear starting point for repairs and energy-saving upgrades.
Our thermographic surveys start from £300. The exact price depends on the size and layout of the property, plus how much scanning and reporting is needed, so a flat in Lower Dock Street will usually cost less than a larger home in Great Milton Park or Caerleon. The quote includes external and internal thermal scans, analysis and an annotated report.
October to March is usually the best window because the inside and outside temperatures are easier to separate. We look for at least a 10C difference so the camera can show the heat escaping through the fabric clearly. On a mild day in Newport, the result can still be useful, but the contrast is often weaker.
Most surveys take 1-2 hours, depending on the size and shape of the home. A compact flat near the Town Centre is quicker to scan than a larger house in Beechwood or a new-build on the Glan Llyn development. The report follows after the images have been checked and annotated.
It can find the temperature patterns that often sit with damp, such as colder areas, moisture ingress and cooling behind affected plaster. In Newport, that matters near the River Usk, the Ebbw and the Severn Estuary, where exposure and surface water can affect walls and floors. A thermal survey points to likely problem areas, then further testing can confirm the cause.
Yes, a little preparation helps the results. Keep the heating on for at least 2 hours before we arrive, and try not to open windows during the build-up period. If there has been strong sunshine, heavy rain or recent decorating work, let us know so we can read the images in the right context.
Yes, and thermal imaging is useful in places like Belle Vue Park, St Woolos and the Town Centre conservation areas. Because the method is non-invasive, we can inspect without disturbing historic finishes or opening up fabric unnecessarily. That is helpful when a property has over 400 listed buildings across Newport and any repair decision needs evidence first.
From £80
Energy performance certificate for buyers and owners
From £399
Homebuyer-style survey for standard homes
From £500
Detailed survey for older or complex properties
From £1,200
Legal support for your property purchase or sale
Thermal imaging surveys in Newport start from £300, and the final cost depends on property size, layout and how much detail the report needs. A compact flat in the Town Centre is simpler to scan than a larger semi in Beechwood or a period home near Caerleon, so the amount of external and internal coverage changes the quote. Our thermal imaging specialists always keep the scope clear before booking, so you know what is included from the start.
The visit itself is only part of the service. We carry out the scans, review the images and prepare an annotated report that explains the likely cause of each thermal defect, plus the fixes that make the most sense for the building. Because Newport includes both modern schemes such as Glan Llyn and older stock in Pill and Malpas, the report is written to separate normal building behaviour from genuine heat loss. That makes the results useful whether the property is being bought, improved or checked after a jump in energy bills.
Accuracy improves when the weather helps the camera do its job. The best results come with heating on for at least 2 hours, a minimum 10C difference between inside and outside, and no strong sun on the elevations we scan. If you want the clearest picture of where warmth is escaping from your Newport home, a winter survey is usually the strongest option. Once the inspection is complete, we turn the thermal data into practical next steps rather than a page of coloured images.
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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.