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. Brian is a director of The CHEESE Project.
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.
An Energy Tracer will come at the prearranged time. Firstly, a large extractor fan is fitted to an external door and run continuously to reduce the pressure inside the building. 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 which point to thermal faults in the fabric of the building. 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, but we cannot offer this as professional advice. You must always consult an expert to determine the best way forward. We will record your current energy use by looking at your gas and electricity bills (you will need to find them in advance).
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!
A note on our pricing
The C.H.E.E.S.E. project is a not-for-profit volunteer-run organisation, which allows us to provide surveys at very low cost. However, for the coming 2019-2020 season, we regret that we have had to raise our charges for surveys. This is why:
- The project has, in previous years, benefited greatly from grants, but unfortunately this season we have failed to receive any, despite six applications up to August 2019.
- The full cost of a survey to us in 2018-19 was £236.
- The average cost of a thermal survey elsewhere is £453, but without the benefits of pressure-reduction and our bespoke imaging software which we believe to be key advantages of C.H.E.E.S.E. surveys.
Below are our prices for various sizes of home. Please note that main rooms means any large room: including living rooms, dining rooms, kitchen-dining rooms, bedrooms and conservatories, but not bathrooms, separate kitchens, utility spaces or garages. Two living rooms which have been 'knocked-through' into one room will be charged as two rooms.
Free surveys are available through our Partners CHAS and WHAM for people experiencing poor housing conditions and those in fuel poverty. Please just get in touch if you would like to refer yourself or someone else for a free survey.
|Building type||Survey time||Charge|
|Flat up to 2 bedrooms||2 hours||£100|
|3 to 5 main rooms||2.5 hours||£150|
|6 to 8 main rooms*||2.5 to 3 hours||£185|
|Over 8 main rooms*||Over 3 hours||£200|
|Commercial surveys for housing associations, councils etc.
(Additional charge for a written report
* We generally only survey large houses at weekends, though there may be some limited availability for surveying large houses on other days.
Each year we train new Energy Tracers (ETs) and they learn on the job, supervised by more experienced ETs in order to gain their certificate. If you have your survey in November or December it may be a 'training survey'. While this may take a little longer you will have the benefit of both ETs experience and their technical and observational skills. We will let you know in advance if it will be a training survey.
If your survey is cancelled less than 72 hours (3 days) prior to your survey there will be a £100 cancellation fee. If you rebook your survey for a different date in the same season, £50 of this will be credited against your new booking.