In this blog, you’ll learn:

What is Thermal Imaging?

Thermal imaging, or infrared thermography, uses specialised cameras to capture infrared radiation and visualise temperature differences across surfaces. Our Category 1 Thermographers use a FLIR E76 camera to conduct our thermographic assessments, shown below during a home assessment.

Our assessor capturing internal infrared images as part of a thermal imaging survey on the home of a Retrofit West voucher customer in Bristol - West of England Combined Authority photo
Our assessor capturing internal infrared images as part of a Retrofit West thermal imaging assessment

The resulting “thermograms” reveal variations in heat, helping to spot problems like insulation gaps, air leakage, moisture intrusion, and even electrical issues. The non-invasive survey provides a detailed look at areas that might otherwise go undetected, helping you make informed decisions about building performance.

Please note: Thermal Imaging assessments for your property are normally only available during autumn and winter (typically between November and April). This is because colder temperatures provide the best conditions for accurate assessments by creating the temperature differentials needed for precise results.

How Does Thermal Imaging Work?

Thermal imaging works by detecting temperature changes on surfaces, often signalling inefficiencies. Infrared cameras detect infrared radiation emitted from objects and convert it into visible light, creating heat maps that reveal these otherwise invisible issues.

Here are some example internal images from our thermographic assessments:

The above internal image from a flat shows a contrast between the warmer walls and the cool ceiling. This indicates a lack of insulation in the ceiling.

In the above internal image from a house, the cold spot in the corner suggests that a condensation risk exists.

The above internal image shows heat loss around door due to poor door seals causing air leakage. There is also a thermal bridge above the door that is leading to heat loss.

The temperature variations shown in these thermographic images are indicative of energy loss, allowing you to address specific areas for improvement. Whether it’s sealing air leaks or improving insulation, thermal imaging assessments provide precise data to optimise building performance.

What’s the Relevance to Energy Efficiency?

Thermal imaging assessments play a key role in evaluating and optimising a building’s energy performance. Here’s why it stands out:

  1. Enhanced Energy Efficiency: By pinpointing areas of energy loss, the assessment helps identify where to add insulation or seal air leaks. Addressing these issues can significantly reduce energy bills and boost overall efficiency.
  2. Preventative Maintenance: Infrared imaging detects problems like overheating electrical components before they escalate into costly repairs, ensuring your building operates efficiently.
  3. Environment Impact and Sustainability: Reducing energy waste not only lowers costs but also contributes to environmental sustainability. By identifying inefficiencies, thermal imaging helps buildings lower their carbon footprint, aligning with sustainability goals.
External thermal image from our survey of Horfield Health Centre
External thermal image from our recent assessment of Horfield Health Centre

For example, in our work with Horfield Health Centre, the thermal imaging assessment was instrumental in identifying areas of poor insulation and air leakage, including the eaves, roof, windows, and doors. By addressing these inefficiencies, the Centre will be able to prioritise cost-effective improvements that reduce energy waste, lowered costs, and support their decarbonisation goals. You can read the full case study here.

What’s Next?

Thermal imaging is a valuable tool for anyone looking to optimise energy efficiency and building performance. By uncovering hidden inefficiencies, it not only enables you to reduce your energy consumption but also can enhance occupant comfort and safety. Whether you’re a property owner, facility manager, or looking to improve your home, a thermal imaging assessment provides the insights needed to make impactful changes.

Want to learn more about what a thermographic assessment involves? Visit our guide on thermographic surveys to learn about the consultation, survey process, reporting and how it can help you identify energy inefficiencies in your property.

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