Home thermal-imaging surveys

Our internal thermal-imaging surveys aim to improve the comfort and energy efficiency of your home, to you save money on your bills and to reduce your climate impact.

The survey process is based on a unique methodology developed by Brian Harper, who has been working with thermal imaging for 45 years and has surveyed over 400 homes.

How it works

We perform surveys in the winter so that when a house is heated there is a large difference between the temperature inside the house compared to the outside.

During the survey, a large extractor fan is fitted to an external door and run continuously to reduce the pressure inside the house. This causes cold air to be drawn in though any gaps. As we work through each room in the house we use the thermal imaging camera to look for cold spots. These may be caused by gaps to the outside through which draughts are pulled by the fan, or by poor thermal insulation from cold bridging or missing insulation etc.

As the householder, you are involved directly with the survey by accompanying the surveyor to see first hand how heat moves around your home and where it is lost. The entire survey is recorded as a video with audio of the surveyor's commentary and any discussions you might have with them. The video is given to you afterwards on a USB memory stick, so you can review the findings at any point.

Following the survey, a briefing is carried out on the main problems that were identified and how they might be remedied. We will record your current energy use by looking at your gas and electricity bills (you will need to find them in advance and you will have the opportunity to borrow a CHEESE energy monitoring and action pack containing simple-to-use meters to monitor energy use and information on DIY energy-saving techniques.

Because we are continuously developing the CHEESE Project and its approach, we will ask you to complete a short questionnaire after the survey to obtain feedback and to learn how effective the survey was for you. We will follow up again after a month and after a year to see if your energy use has changed!


From someone who struggled to heat her home to a comfortable temperature: "A real eye-opener. Excellent! I found I could do everything for about £150 and got to work straight away."

"There were still places where draughts were coming in and heat leaking out that I would never have thought of."

"We were very pleased with the results of the survey and found the process very interesting.  We have found the results of the electricity smart reader useful too and I'm much more conscious now about turning off lights, sockets etc!"

“Measures [sealing round skirting boards in kitchen and lounge, blocking chimney draught, lagging pipes in cellar] have reduced monthly electricity bill by £15.”

From two people who had already made some insulation improvements: "Thank you very much for laying on Brian, Dave and Matt today. Very instructive, some draught proofing and the like to work on but generally very encouraging for us."


Below are our prices for various sizes of home; note that rooms means reception rooms plus bedrooms.

We do offer free surveys to households on low incomes.

Building type Survey time Charge
1 to 3 room flat/maisonette 2 hours £60
3 to 5 room house 2.5 hours £70
6 to 8 room house* 2.5 to 3 hours £100
Over 8 rooms* Over 3 hours £120

* We can only survey large houses at weekends.