Infrared imaging that exposes heat loss, damp and insulation failures








Derby's housing stock spans everything from Georgian townhouses along Friar Gate to Victorian terraces in Normanton and Peartree, interwar semis across Chaddesden and Alvaston, and post-war estates covering Sinfin and Stenson Fields. With the median construction year for Derby homes recorded at 1971 and approximately 20% built before the 1940s, most properties in the city carry insulation and moisture management standards that simply do not meet modern expectations. Our thermographic surveys use calibrated infrared cameras to map heat loss, damp ingress, and thermal bridging across every surface - giving you the evidence to negotiate, plan remediation, or walk away before exchange.
Derby sits on Mercia Mudstone and Namurian geology - clay-bearing formations that are rated for shrink-swell behaviour by the British Geological Survey. Seasonal expansion and contraction in these clay soils creates stress on the foundations and external brickwork of older properties, opening micro-cracks that allow rainwater and ground moisture to enter wall structures. Our infrared cameras detect the resulting cool, damp patches behind Derby's plaster and masonry well before they become visible as staining.
Our inspectors carry out thermographic surveys across all Derby postcodes, from the conservation areas of DE1 and DE3 to suburban DE21, DE22, DE23, and DE24, and into the wider Derby postcode district. We work alongside buyers, sellers, landlords, and property managers, producing reports that are clear enough to use directly in purchase negotiations and detailed enough to brief specialist contractors for remedial works.

£241,557
Average House Price
£355,083
Detached Average
Rightmove, last 12 months
£229,058
Semi-Detached Average
Rightmove, last 12 months
£176,743
Terraced Average
Rightmove, last 12 months
9,500
Annual Sales (2025)
4.8%
New Build Share
452 new build sales, average £314,000
Our thermographic survey carries out a systematic infrared assessment of your Derby property from top to bottom. Using FLIR thermal imaging cameras, our inspectors record surface temperature data across all internal walls, ceilings, floors, windows, doors, and roof spaces, producing a report that locates each thermal anomaly precisely within the building envelope.
Insulation is the primary focus in Derby's established housing stock. In solid brick Victorian and Edwardian terraces, common across Normanton, Peartree, and the streets surrounding the Arboretum conservation area, there is no cavity to fill. Our thermal imaging shows the temperature drop across the full wall face, identifying which elevations are losing heat most rapidly and where internal or external wall insulation would deliver the highest return. In cavity wall properties from the 1930s to 1980s, which dominate suburbs like Chaddesden, Alvaston, Sinfin, and Stenson Fields, we identify sections where insulation was never installed, has slumped to the base of the cavity, or has been bridged by construction debris.
Damp detection is equally important in Derby's older stock. Moisture within a wall or floor carries a lower surface temperature than the surrounding dry fabric, creating a clear thermal contrast on our infrared images. Our inspectors combine thermal imaging with surface damp meter readings to distinguish between cold bridging and actual moisture ingress, ensuring your report identifies the correct cause and appropriate remediation for each anomaly.
Our survey also assesses electrical distribution boards, wiring routes, and sockets under thermal imaging. Overloaded circuits and degraded connections generate heat that registers distinctly in infrared. We record these locations and include them in your report alongside recommended follow-up by a qualified electrician.
Based on thermographic surveys across UK residential properties with age profiles comparable to Derby's housing stock. Pre-1940 solid wall prevalence is estimated from Derby median construction data.
Derby has sixteen designated Conservation Areas, more than most comparable cities. These range from the Georgian townhouses of Friar Gate and the Victorian railway workers' terraces of the Railway Conservation Area to the mill workers' cottages of Darley Abbey and the mature suburban streets of Allestree and Mickleover. In each of these areas, planning restrictions limit or prohibit external wall insulation, replacement double-glazed windows, and external render - the interventions most commonly used to improve thermal performance in older properties.
Our thermographic survey is particularly valuable for buyers in Derby's conservation areas because it defines the precise extent of heat loss within the existing fabric. With that data in hand, you can plan secondary glazing behind existing sash windows, internal insulated lining boards on the worst-performing walls, and targeted draught-proofing at skirting and cornice junctions - all interventions that typically do not require listed building consent. Our inspectors note each intervention opportunity in the report and rank them by estimated impact on thermal performance.
The Friar Gate Conservation Area in DE1 contains some of Derby's most expensive and architecturally significant residential properties, including Grade II listed Georgian townhouses with solid masonry walls, original timber sash windows, and suspended timber floors - each a major thermal weak point. Our inspectors assess all three elements systematically during a heated survey, recording where the greatest temperature drop occurs and whether the cause is air infiltration, moisture, or pure conductive heat loss through uninsulated solid walls.
Derby sits on Mercia Mudstone geology - a clay-bearing formation identified by the British Geological Survey as susceptible to shrink-swell behaviour. During dry summers, clay soils shrink and pull away from foundations; during wet winters, they expand and push against them. This cyclical ground movement stresses the brickwork of older Derby properties, opening micro-cracks at mortar joints and around window and door openings. These cracks allow rainwater and ground moisture to penetrate the wall structure, accumulating as damp patches that are invisible to a visual inspection but appear clearly under infrared imaging. Properties in lower-lying parts of Derby close to the River Derwent and its flood plain are particularly susceptible to elevated ground moisture conditions compounding this risk.
Derby is in the middle of significant city centre regeneration. The Nightingale Quarter and Becketwell schemes are delivering apartment blocks and mixed-use developments in DE1, with the postcode sector DE1 2 recording the highest volume of new home sales in the Derby district in 2025 at 46 properties. These modern builds use construction methods that differ substantially from Derby's established housing stock, but thermal defects are still common in newly completed homes.
New apartment developments present a specific set of thermal risks. Concrete frame construction is prone to thermal bridging at floor plate connections, where the structural slab passes through the building envelope and acts as a direct heat conductor between inside and outside. In timber frame elements within mixed-construction schemes, compressed insulation at connection points and breached vapour barriers create cold spots that only infrared imaging can locate. Our inspectors use the same calibrated FLIR cameras on new builds as on established properties, producing thermal images that document defects you can claim under your new-build warranty or under the Consumer Code for New Homes.
For buyers purchasing off-plan or within the first two years of completion, our thermographic survey creates a formal record of thermal anomalies that developers are obliged to rectify under the defect liability period. Derby's regeneration projects are ambitious, but build quality under programme pressure is a known variable. Our survey produces the evidence you need before that liability window closes.

| Issue | Thermographic Survey | Standard Visual Inspection |
|---|---|---|
| Insulation gaps in cavity walls | Precisely located by thermal contrast | Not detectable - wall not visible |
| Damp behind plaster | Detected via cool surface temperature | Surface staining only when severe |
| Thermal bridges at junctions | Quantified at wall, floor and roof junctions | Not assessed |
| Air leakage paths | Mapped across windows, doors, skirting | Not detectable |
| Electrical overloads | Recorded as heat anomalies on distribution board | Not detectable |
Insulation gaps in cavity walls
Thermographic Survey
Precisely located by thermal contrast
Standard Visual Inspection
Not detectable - wall not visible
Damp behind plaster
Thermographic Survey
Detected via cool surface temperature
Standard Visual Inspection
Surface staining only when severe
Thermal bridges at junctions
Thermographic Survey
Quantified at wall, floor and roof junctions
Standard Visual Inspection
Not assessed
Air leakage paths
Thermographic Survey
Mapped across windows, doors, skirting
Standard Visual Inspection
Not detectable
Electrical overloads
Thermographic Survey
Recorded as heat anomalies on distribution board
Standard Visual Inspection
Not detectable
Thermographic surveys require a minimum 10-degree Celsius temperature difference between inside and outside the property. Derby's climate makes October to April the optimal survey period.
Enter your property postcode on our quote page to get an instant price and available dates. We cover all Derby DE postcodes including city centre DE1, Friar Gate and Kedleston Road DE22, Allestree and Darley Abbey DE22, Chaddesden and Spondon DE21, and suburban areas DE23, DE24, and DE3.
Switch your heating system on at least three hours before our inspector arrives. Move furniture away from external walls where possible and leave curtains and blinds open to expose window frames. Loft hatches should be accessible if a roof space assessment is included. This preparation gives our infrared cameras clean access to the surfaces where thermal anomalies are most likely to occur.
Our inspector conducts a systematic survey of all rooms, photographing every external wall, ceiling, floor, window frame, and door frame with our FLIR thermal camera. The electrical distribution board is assessed, and any visible pipe runs are included. For a typical Derby semi-detached property, the inspection takes two to three hours. Larger detached properties in Allestree, Mickleover, or Littleover may take up to four hours.
Every thermal anomaly recorded during the inspection is analysed and included in your written report with an annotated thermal photograph, a description of the likely cause, severity assessment, and recommended remedial action. Damp meter readings taken alongside thermal images are referenced in the relevant sections. Reports are issued within two working days of the inspection.
Your inspector remains available after the report is issued to discuss findings by phone or email, explain the significance of identified defects, and advise whether further specialist investigation is warranted. Our inspectors have working knowledge of repair costs for common Derby property defects and can help you assess the financial implications before exchange.
The median construction year for Derby homes is 1971, meaning the largest portion of the city's housing stock was built in the late 1960s and through the 1970s - a period when cavity wall construction was standard but cavity insulation was rarely installed, and loft insulation requirements were minimal by today's standards. These properties dominate the estates of Sinfin, Stenson Fields, Chaddesden, Alvaston, and parts of Allestree. Our thermal survey maps exactly where the insulation gaps are before you invest in cavity fill or loft insulation upgrades.
Derby's energy efficiency challenge is also shaped by its significant flat stock. With flats, maisonettes, and apartments accounting for 21.7% of all households in Derby - higher than the national average and much higher than in South Derbyshire - thermal bridging at floor plate connections and party wall junctions becomes a key concern. Our inspectors assess the thermal performance of floor slabs, party walls, and roof terrace structures in flat conversions and purpose-built apartment blocks, identifying where heat is escaping through the structure rather than through inadequate insulation in the walls alone.
With average house prices at £241,557 and new build averages at £314,000, Derby buyers are investing significant sums. Identifying insulation and damp defects before exchange allows you to quantify remediation costs accurately and factor them into your offer. Our thermographic report provides the evidence base for these negotiations, with specific thermal images and inspector notes that can be shared directly with the vendor or their agent.
The streets of Normanton (DE23), Peartree (DE23), Siddals Road area (DE1), and parts of New Normanton contain dense concentrations of Victorian and Edwardian brick terraces. These properties have solid external walls - typically 225mm to 340mm of solid brick - with no cavity. Heat loss through solid brick walls is substantially higher than through a modern insulated cavity wall, and these properties rarely have adequate loft insulation or draught-proofing at suspended timber ground floors.
Our thermographic survey of a Victorian Derby terrace typically reveals four principal heat loss routes: the solid front and rear walls, the suspended timber ground floor (where cold air circulates beneath the boards), the roof-ceiling junction where loft insulation does not extend to the eaves, and the original single-glazed or poorly sealed window frames. Our inspectors photograph each of these locations under infrared and record the temperature differential in the report, giving you a clear ranking of which remediation work will have the greatest impact on energy costs and comfort.
Party walls between terraced properties also appear in our thermal survey. Where there is a significant temperature difference between adjacent properties - for example where one property is unoccupied and unheated - heat loss through the party wall can be substantial. Our inspectors note where this is occurring so you can factor in the long-term variability of thermal performance depending on your neighbours' occupancy and heating patterns.
Thermal imaging accuracy depends on a meaningful temperature difference between the inside and outside of the property - a minimum of 10 degrees Celsius is required. Derby's climate reliably provides this from October through April, with November to February typically offering the most consistent conditions for heating-dependent surveys. During these months, our heating-on protocols ensure clear thermal images across all surfaces. Surveys outside the heating season can still be conducted on heated properties but may show less pronounced results on milder days. Demand across Derby DE postcodes is highest from December to February, so booking four to six weeks ahead secures your preferred date.
Our thermographic survey pricing for Derby properties is based on property type and size. Use our online quote tool with your Derby postcode and property details to receive an instant price. Pricing covers the full inspection with FLIR thermal imaging cameras, damp meter readings where required, annotated thermal image report, and post-survey debrief with your inspector. We do not charge additional travel fees within the Derby DE postcode district.
Yes - damp detection in solid brick and cavity wall properties is one of the most reliable applications of thermal imaging. Moisture trapped within a Derby terrace wall carries a lower surface temperature than the surrounding dry brickwork, producing a distinct cool patch in our infrared images. In Normanton, Peartree, and the Victorian streets around Derby Arboretum, rising damp from clay-bearing ground soils and penetrating damp at poorly pointed mortar joints are recurring findings. Our inspectors combine thermal images with damp meter readings to confirm moisture is present within the wall, not just at the surface.
Most Derby semi-detached properties take two to three hours from arrival to completion. Larger detached properties in Allestree, Mickleover, or Littleover, or Victorian terraces with additional outbuildings, may take three to four hours. We recommend that you are present during the inspection so our inspector can walk you through the thermal images in real time. Reports are issued within two working days and your inspector remains available for a telephone debrief after you have had time to review the findings.
For buyers at Nightingale Quarter, Becketwell, or other DE1 regeneration schemes, thermal imaging within the two-year defect liability period creates a formal record of any build defects you can present to the developer for rectification. Concrete frame buildings are particularly prone to thermal bridging at floor plate connections, where the structural slab spans the building envelope. New-build thermal surveys in Derby have identified these bridging points in properties that appeared visually complete, allowing buyers to claim remediation from developers before the liability window closes.
The heating must be running for at least three hours before our inspector arrives, and ideally for longer on the morning of the survey. The required internal-to-external temperature difference is at least 10 degrees Celsius. For vacant Derby properties being sold or let, the vendor should arrange for the heating to be switched on ahead of the survey time. Our booking team will confirm these requirements when you schedule and will contact the relevant party if access coordination is needed.
Thermal imaging of the consumer unit and accessible wiring routes forms part of our standard Derby survey. Overloaded circuits, failing connections at junction boxes, and undersized cables generate heat that shows clearly under infrared imaging. Our inspectors record the location and severity of any electrical hot spots and note them in the report with a recommendation to follow up with a qualified electrician or EICR assessment. This is an additional safety layer that standard visual inspections and RICS surveys do not typically provide.
Derby City Council has designated sixteen Conservation Areas including Friar Gate, Arboretum, Railway, Darley Abbey, Little Chester, Strutts Park, Spondon, Mickleover, Allestree, and Markeaton. Properties within these areas are subject to restrictions that typically prevent external wall insulation, replacement double glazing, and external render changes. This means internal draught-proofing, secondary glazing, and targeted internal insulation are often the only viable routes to improving thermal performance. Our thermographic survey maps the heat loss precisely, identifying which walls and elements most urgently need attention so that any internal works are targeted rather than speculative.
Your report includes a prioritised list of findings, from minor air leakage issues addressable with draught-proofing through to significant insulation failures requiring professional remediation, and damp or structural anomalies warranting specialist investigation. Derby buyers have used thermographic findings to renegotiate purchase prices, obtain formal vendor repair commitments before exchange, and withdraw from purchases where remediation costs exceeded their budget. Our inspector is available by phone to help you assess the financial implications and can recommend Derby-based specialist contractors where further investigation or remediation is appropriate.
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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.