Infrared thermal imaging to detect heat loss and hidden defects








Our thermal imaging specialists carry out detailed infrared surveys across Grantham, from Belton Lane and Manthorpe Chase to Westgate and St Peter's Hill. A thermal camera reads surface temperature patterns that the eye cannot see, so cold bridging, missing insulation and damp patches show up clearly on screen. The scan is non-invasive and non-destructive, with cameras detecting surface temperature variation to 0.1C accuracy. That makes it a practical way to see where a home is losing heat before more money slips away through the walls, roof or around leaky openings.
Grantham's housing mix includes older brick and stone homes near 16 Market Place and 7-9 Westgate, plus newer plots at Barrowby Place, Kings Newton and Manthorpe Chase. Those homes behave very differently under infrared, from hidden gaps in modern cavities to draughts around original sash windows in conservation-area properties. A thermal survey shows where comfort is being lost, which rooms cool first, and what needs attention before the next cold spell.

£245,000
East Midlands Average House Price
1.6%
12-Month Change
£250,000
Manthorpe Chase From Price
£172,000 - £430,000
Kings Newton Price Range
£161,000
Barrowby Chase First Homes From
Using listing data from home.co.uk and property data from homedata.co.uk
Infrared scans reveal more than just a cold wall. On homes around Barrowby Road, NG31 8AE, and Belton Lane, NG31 8YX, we often see missing loft insulation, cold bridges at joists, air leakage at window reveals and hidden heat loss around service penetrations. The thermal image also highlights underfloor heating faults, electrical hotspots and temperature patterns that point to hidden moisture. Because the camera reads surface temperatures, a room can look normal while the image exposes a clear defect.
Around St Peter's Hill and the Guildhall Arts Centre area, thermal imaging is especially useful where older construction hides what visual checks cannot reach. A damp patch under a painted ceiling, for example, often shows as a colder zone before staining appears, and that can point towards moisture ingress through roof coverings or failed flashings. Heat loss also tends to show in a recognisable pattern, with roof areas commonly losing around 25%, walls around 35% and windows around 15% on poorly performing homes. Those figures are typical rather than fixed, but they show why the camera is such a useful diagnostic tool.

Older brickwork around 16 Market Place, Westgate House on NG31 6LX and 7-9 Westgate, NG31 6LT often behaves like a solid wall, so heat moves through the fabric faster than it does in a modern cavity wall. Conservation-area homes near My Nursery Conduit Lane, NG31 6PB, and the Guildhall Arts Centre on St Peter's Hill, NG31 6PY, can also hide patch repairs, altered roof junctions and upgraded windows that do not quite meet the original construction. A thermal image shows where those changes have left gaps. That matters in Grantham because the outside air here can pull heat from a weak envelope very quickly once the heating drops back.
Newer schemes need checking as well. Manthorpe Chase on Belton Lane, Barrowby Place off Barrowby Road and Kings Newton in NG31 8NP all sit in the sort of mixed stock where modern materials meet different building details, and heat loss often appears at poorly sealed junctions rather than through whole walls. Planning records in the town also mention brick types such as Ibstock Welbeck Autumn Antique and profiled metal cladding, which tells us the local stock is not uniform. Thermal imaging picks up those differences well, especially where the building envelope changes from one material to another.
homedata.co.uk records show the East Midlands average house price at £245,000, with a 1.6% year-on-year change, which gives a useful sense of the sums involved when owners think about insulation, glazing and draught proofing. A survey that shows where heat is being lost can focus the spend on the parts of the home that will move the dial. That is useful on Barrowby Chase, where Taylor Wimpey has planned 122 private residences and 53 affordable homes, as much as it is on a listed building near Westgate. Different homes, same problem, wasted energy where the fabric is weakest.
Heat loss rarely spreads evenly, and that is where thermal imaging earns its place. A scan can show a thin red line around a loft hatch in NG32 1DD, a cold band below a window in NG31 8YX, or a cooler patch at a wall junction that points to missing insulation or a thermal bridge. Those patterns give a clearer route to action than guesswork. Once the weak spots are mapped, the home can be improved in the right order, starting with the losses that matter most.
Thermal findings also help with EPC planning and upgrade decisions. If a house on Barrowby Road is leaking warm air through the roof, the first fix may be loft insulation rather than new glazing, while a property near 16 Market Place may need draught reduction around original openings before any deeper work. Some owners want a quick comfort gain, others are looking at longer term energy savings, and the report gives both a practical starting point. In many homes, that means the heating runs less hard and rooms hold temperature for longer.

Choose your Grantham survey date and give us the property details, including whether the home is a flat near St Peter's Hill, a terrace off Westgate or a newer house at Manthorpe Chase.
We look for the strongest thermal contrast, which is usually between October and March, when the inside and outside temperatures differ by at least 10C.
The heating should be on for at least 2 hours before we arrive so the building envelope settles into a clear temperature pattern.
Our surveyors complete external and internal scans, capturing roof edges, wall junctions, windows, floors, loft hatches and any areas that may show damp or heat leakage.
We review the thermal patterns, remove false leads caused by reflections or recent solar gain, and annotate each finding so the problem is easy to understand.
You receive a written report with thermal images, notes on the likely cause, and practical recommendations for next steps.
Colour scales matter, because the camera is not showing paint or plaster, it is showing temperature patterns. Cooler areas usually appear blue or purple, while warmer zones move towards red, orange or white depending on the scale used in the report. On a house near Kings Newton or Barrowby Place, that can make a missing patch of loft insulation stand out at once. A good report explains each image in plain English, so the meaning is clear without needing to read the camera screen yourself.
False readings can happen, which is why the survey is more than a quick scan. Reflections from shiny surfaces, recent sunlight on the west-facing side of a property on Westgate, or a wall that has just been cooled by rain can all affect the image. Our surveyors note those factors, compare internal and external views and explain where the thermal pattern does, and does not, point to a real defect. The final report is designed to separate heat loss from background noise, so the next repair is based on evidence rather than a guess.
Homes around Westgate and St Peter's Hill often show cold strips at roof junctions, uninsulated loft hatches and draughts through older sash windows. Listed buildings near 16 Market Place, NG31 6LJ, and 7-9 Westgate, NG31 6LT can also reveal patchy repairs where previous work has left weak points around the envelope. Those are the places where heat escapes first. Thermal imaging shows the defect long before the room feels truly cold.
Mixed-material walls are another regular find, especially where older brick meets newer additions on streets that have seen alteration over time. On NG31 8YX and NG31 8NP plots, we often see gaps around service penetrations, light fittings and loft interfaces, while homes in NG32 1DD can show losses linked to poor sealing at extensions or utility runs. Moisture ingress may appear where brickwork, render and cladding meet, including elevations that use materials like Ibstock Welbeck Autumn Antique brick or profiled metal cladding. That sort of issue does not always show as staining, but the thermal image makes it visible.

Our thermal imaging specialists can detect heat loss, missing or collapsed insulation, cold bridging, draughts around windows and doors, underfloor heating faults and some electrical hotspots. The scan can also highlight surface patterns linked to hidden damp or moisture ingress. In Grantham, that is useful for both older homes around Westgate and newer plots at Manthorpe Chase.
Prices start from £300, with the final fee depending on property size, layout and access. A flat near St Peter's Hill may be quicker to scan than a larger house with loft access, outbuildings or awkward roof lines. The quote also reflects the amount of image analysis and report detail needed after the visit.
October to March is the strongest window for thermal imaging because the temperature difference between inside and outside is usually easier to work with. We look for at least a 10C difference so weak spots stand out clearly on the camera. If the heating has been on for at least 2 hours before the survey, the results are usually sharper.
Most Grantham surveys take 1-2 hours, depending on the size and complexity of the property. A modern home at Kings Newton may sit at the quicker end, while a listed property near 16 Market Place or 7-9 Westgate can take longer because of extra rooms, roof voids and varied construction details. The report is prepared after the visit, once the images have been reviewed and annotated.
It can find the temperature patterns that often go with damp, such as colder patches caused by moisture ingress or evaporation. That makes it a very useful indicator, but it does not replace a full diagnosis of the water source. In a Grantham house near Barrowby Road or Westgate, we would use the thermal image alongside visible signs and the construction detail to work out the likely cause.
Yes, a little preparation helps the camera read the building properly. Keep the heating on for at least 2 hours before the appointment, and make sure loft hatches, cupboards and access points can be reached easily. If the home is on Belton Lane, NG31 8YX, or in a conservation area near St Peter's Hill, clear access matters because hidden junctions are often where the most revealing images are found.
Yes, and new-build homes can show clear results because small gaps are easier to spot against a tight envelope. At Manthorpe Chase, Barrowby Place and Kings Newton, the survey often highlights sealing issues around services, loft spaces or joins between materials. Even where a house looks modern, a thermal image can show why one room feels colder than the others.
From £80
Energy rating assessment for buyers and owners planning heat-loss upgrades
From £400
A practical survey for standard homes and newer properties with visible defects
From £600
Detailed survey for older, altered or listed homes around Westgate and Market Place
A Grantham thermal imaging survey starts from £300, and the fee rises with property size, access and the level of reporting required. A compact flat near Barrowby Road will usually be simpler to scan than a larger house with extensions, loft conversions or conservation-area constraints around Westgate and St Peter's Hill. The price includes external and internal infrared scans, review of the images and an annotated report that explains what the camera found.
For older homes in NG31 and NG32, the best results come when the heating has been on for at least 2 hours and the weather gives us at least a 10C temperature difference inside and outside. That contrast is what makes heat loss stand out, especially in roofs, wall junctions and draughty openings. Reports are usually issued after the survey once the images have been checked carefully, so the findings are clear enough to act on without extra guesswork.
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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.