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Thermal imaging surveys are also available for businesses and other organisations - please click here for more information.

Thermal imaging is an engaging and indispensable tool for demonstrating where heat is being lost in your home.  In December 2015 our thermal imaging service was featured on Channel 4 Dispatches as part of our work with a major housebuilder to rectify insulation issues in new-builds.  Most of our clients are very surprised at the sources of heat loss we uncover - from cold draughts emanating through cracks they hadn’t even noticed, right up to entire walls or roofspaces which have been missed out by insulation installers.

How does it work?

1.   We will book in a convenient time to visit you in your home - naturally this will depend on the time of year (usually November-April) and forecast weather conditions.  Note that we may suggest rearranging for another date if the conditions turn out to be unsuitable.
2.   When we arrive we’ll discuss in some detail the problems you have encountered with heat loss/draughts and any objectives you have.
3.   Unlike our competitors, we will always carry out a full internal and external survey as standard (see below for more information)

How long does a survey take?

This depends to an extent on the size of your home, but also on how involved you want to be.  We strongly encourage you to follow us around on the survey - we will both learn more in the process, which will ultimately help us to help you.  We suggest you allow a minimum of 1 hour, and up to 2 hours if you have a lot of questions and/or a large property.

What will you receive?

Usually within 7-14 days you will receive your thermal imaging report in PDF format, including copies of the images recorded, and our interpretation of what they are indicating PLUS if you are the homeowner you will receive a detailed 26-page PDF guide to Insulation, Ventilation & Draughtproofing.  Full written recommendations for remedial work are available for an additional £100.

You might be interested to know that the majority of our clients combine the thermal imaging survey with a detailed home energy survey, providing them with a comprehensive report including detailed recommendations for improving the energy performance of their home.  In this case the thermal images will be incorporated into the home energy report.

Our equipment

We use a Flir thermal imaging camera - our model is specifically designed for building thermography, with increased sensitivity (<0.1degC) and incorporating a photographic image with the thermal image, a feature which helps to put the latter into the context of its surroundings.
1-3 bedrooms
4 bedrooms
5 bedrooms
Each additional bedroom
Written recommendations
West Sussex, Surrey, Berkshire, Wiltshire, Dorset
Greater London, Bucks, Oxon,
E. Sussex, Gloucs, Bristol, Somerset, Beds, Herts
Other counties (at our discretion)
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Our experience


Expert Energy’s Andy Smale is a physicist by training.  As well as running Expert Energy, Andy has many years’ experience working in a consultant role for local charity Winchester Action On Climate Change, and is regularly invited to appear as an energy advisor on BBC Radio Solent.  Please see Andy’s LinkedIn profile for more details on his background experience and qualifications.   


Prices - PLEASE NOTE: All site surveys are currently suspended due to COVID-19


Please note that our thermal imaging service can be incorporated into our home energy survey at a small additional cost.  Surveys are typically available from  November through to April, depending on the weather conditions.  Surveys for damp and heating system leaks can be carried out at any time of year.


Unlike our competitors, we can only recommend - and offer - a survey that covers both the interior and exterior of your home.  This is largely because the results of an exterior-only survey are very dependent on weather conditions; however, even when conditions are perfect an external survey is very unlikely to pinpoint heat loss and draughts to anything like the same extent as an interior survey.


A report in PDF format is included by default, however this only presents the images recorded and an interpretation of what each shows - full written recommendations for remedial work are available for an additional £100.











For more information or to book a survey, please contact us.


Insulation problems


Insulation is one of two main barriers to heat loss (the other being airtightness).  Where insulation is missing or patchy it opens the door to heat passing through that part of the wall (right), floor or ceiling.  Studies have shown that if 10% of insulation is missing, it typically reduces that part of the building’s ability to retain heat by a staggering 50%.  Unfortunately a poor standard of insulation is not usually obvious to the naked eye, and is often completely hidden within the building fabric.  


Thermal imaging can quickly identify where heat is being lost as a result of poor workmanship, or well-meaning but counterproductive installation.  In the more extreme cases it can be used as evidence to help with rectifying substandard building work.

No VAT is chargeable on the above prices.  Group discounts are available - please contact us for more details.


For more information or to book a survey, please contact us.



Draughts are not only uncomfortable, they are also usually an indication of heat being lost unnecessarily - after all that air has got to be going somewhere!  Unfortunately the source of draughts is not always obvious - for example cold air coming through floorboards and skirting tends to be quite diffuse; draughts through long hairline cracks also tend not to be noticed at all, particularly where cracks have developed slowly over time.  Doors, windows (right), old vents and fans are more obvious culprits, but even then some homeowners are blissfully ignorant of their impact.


The thermal imaging camera immediately picks up the cold traces that give away where cold air is entering the property, providing objective evidence as to where to focus your draughtproofing efforts.


Cold air infiltration


Draughts and cold air infiltration are slightly different - cold air from outside can dramatically cool rooms down as it moves through the voids behind walls, above ceilings and below floors... without the cold air ever entering the living space itself.  Much of this depends on the design of the house, quality of construction and any extension work which has taken place over the years.  In almost every case, however, all the homeowner will know is that a particular room is cold and they can’t work out why.


Draughts and cold air infiltration are the most significant sources of heat loss in many homes.  The image on the right shows cold air infiltrating between joists above a ground floor living room.  


Heating and damp problems


During our survey we can often uncover a plethora of problems with the heating, from air trapped in the system and unbalanced radiators to leaking underfloor heating and heat haemorrhaging from uninsulated pipework hidden in voids (right).  


Problems with damp can also be assessed, although it is recommended that a this is supplemented with an inspection from achartered building surveyor specialising in this field as this is a complex area.

What we look for during the survey