DJI Matrice 4 Thermal
Thermal Imaging: See What's Hidden
Most drone operators offer a standard camera. We carry a radiometric thermal sensor that records precise temperature data at every single pixel. It does not just show you a pretty heat map - it measures actual surface temperatures with ±2°C accuracy.
That is the difference between knowing something looks warm and knowing it is 14.3°C warmer than the area next to it. One is a picture. The other is evidence.
±2°C
Accuracy
640×512
Thermal Resolution
Per Pixel
Temperature Data
What Thermal Imaging Reveals
Your property is constantly losing and gaining heat. Thermal imaging makes the invisible visible - here are the four main things we find.
Heat Loss
Thermal imaging shows exactly where warmth escapes your building - through the roof, walls, around windows, or at junctions where different materials meet. You get a clear picture of where your money is going, not a guess.
Moisture Detection
Trapped moisture in a roof or wall behaves differently to dry material when it heats and cools. Thermal imaging picks up these temperature differences, revealing damp and water ingress that you would never spot visually - even from up close.
Insulation Gaps
Missing or failed insulation stands out clearly on a thermal image. Whether it is cavity wall insulation that has slumped, loft insulation that has been disturbed, or sections that were simply never insulated - the camera shows it all as colour-mapped temperature differences.
Solar Panel Faults
A healthy solar panel has a uniform temperature across its surface. Faulty cells, failed bypass diodes, and micro-cracks create hotspots that thermal imaging detects instantly - even when panel output looks normal from the inverter readings.
How Thermal Imaging Works
The Short Version
Everything with a temperature above absolute zero emits infrared radiation. Warmer objects emit more, cooler objects emit less. A thermal camera detects this radiation and converts it into a colour-mapped image where you can see temperature differences across a surface. The DJI Matrice 4 Thermal does this from the air, covering your entire property in minutes.
Radiometric vs Non-Radiometric
This is the key distinction most people do not know about, and it matters. There are two types of thermal camera on drones:
Radiometric (What We Use)
Stores actual temperature data at every pixel. You can measure precise temperatures, compare areas, and analyse the data after the flight. This is what professionals use for building surveys.
Non-Radiometric (Basic)
Only produces a colour image showing relative hot and cold areas. Looks impressive but contains no measurable data. Fine for finding your cat in the garden, not for professional surveys.
What You Get In Your Report
- Annotated thermal images with temperature readings at specific points
- Side-by-side thermal and visual photos so you can see exactly where issues are
- Temperature difference measurements between problem areas and surrounding surfaces
- Plain-English explanations of what each image means and what (if anything) needs doing
- Recommendations prioritised by severity - what needs fixing now vs what can wait
When Do You Need Thermal vs Standard Visual?
Thermal and visual inspections answer different questions. Some jobs need one, some need the other, and some need both. Here is a straightforward guide.
| Scenario | Visual | Thermal |
|---|---|---|
| Checking for cracked or slipped tiles | - | |
| Finding where heat escapes your roof | - | |
| Assessing chimney stack condition | - | |
| Detecting moisture trapped in a flat roof | - | |
| Documenting storm damage for insurance | - | |
| Checking insulation coverage in walls or loft | - | |
| Spotting faulty solar panel cells | - | |
| Surveying gutters, fascia, and soffits | - |
Not sure which you need? Call us on 01392 964094 and describe what you are dealing with. We will tell you honestly whether thermal imaging will help or whether a standard visual inspection is all you need.
Thermal Imaging Applications
Here is how we use thermal imaging across different types of survey, including what each one reveals and the best conditions for accurate results.
Pitched Roof Survey
What We Do
Full thermal scan of tiles, ridges, valleys, and hip joints
What It Reveals
Heat loss through missing/failed insulation, moisture under tiles
Best Conditions
Winter mornings (before sunrise or just after)
Flat Roof Survey
What We Do
Systematic scan of entire membrane surface
What It Reveals
Trapped moisture in the roof build-up, failed seams, ponding areas
Best Conditions
Evening after a warm day (trapped moisture retains heat)
Wall Insulation Check
What We Do
Thermal survey of exterior walls from ground and air
What It Reveals
Missing cavity fill, slumped insulation, thermal bridges at lintels
Best Conditions
Cold mornings with heating on inside
Solar Panel Inspection
What We Do
Individual panel and cell-level thermal analysis
What It Reveals
Hotspots, faulty bypass diodes, cracked cells, shading damage
Best Conditions
Midday in direct sunlight (panels under load)
Window & Door Assessment
What We Do
Thermal comparison of glazing units and frame seals
What It Reveals
Failed double glazing seals, draughty frames, missing cavity closers
Best Conditions
Cold weather with heating on
Commercial Buildings
What We Do
Large-scale roof and facade thermal surveys
What It Reveals
Systematic insulation failures, roof membrane damage, HVAC leaks
Best Conditions
Depends on building use - we advise on timing
Timing matters for thermal surveys. We schedule flights for the conditions that give the best results for your specific situation.
Thermal Imaging Services
We offer several thermal survey packages depending on what you need inspected. Each includes a full written report with annotated images.
Thermal Roof Survey
Focused thermal scan of your entire roof - pitched or flat. Identifies heat loss, moisture ingress, and insulation failures.
View service details →Thermal Insulation Survey
Whole-property thermal assessment covering roof, walls, windows, and doors. Find out exactly where your energy bills are going.
View service details →Solar Panel Inspection
Cell-level thermal analysis of your solar array. Detects hotspots, bypass diode failures, and underperforming panels.
View service details →Ready to See Your Property From Above?
Whether it's a leaky roof, high energy bills, storm damage, or just wanting to know what state things are in - get in touch for a free quote.