Air Tightness Solutions
heat loss in homes

Heat loss in homes


The achievement of the UK target for net zero by 2050 is highly challenging and will require a coordinated effort by us all living in the UK. Domestic housing is currently a major contributor to our emissions. Heating is responsible for 15% of CO2 emissions and 22% of the embodied carbon in electricity usage is also included.

Of the 28 million existing homes in the UK, many are draughty and poorly insulated. This results in higher energy consumption. Identifying and rectifying heat loss in homes could make a huge difference and put the UK on track for its 2050 goal.


Causes of heat loss in homes

Some of the main causes of heat loss in homes are:

  • Poorly insulated walls – these account for 34-45% of heat loss in homes.
  • Through the roof – an uninsulated roof account for 20% of heat loss.
  • Windows and doors – heat loss through these are the most noticeable as you can feel the draught. However, they actually account for the least amount of loss.
  • Through the floor – The amount lost through the floor will depend on how old it is. The older the more heat loss.

How to identify heat loss in homes

A survey is done to identify heat loss in homes. The different survey techniques are airtightness testing. They quantify the amount of air leakage, thermographic surveys and smoke testing which are diagnostic tools allowing identification of areas for improvement. In this case, a thermographic survey would be used. It is designed to pick up infrared light, which is invisible to the human eye. The survey can see where exactly heat is being lost.

Once the source is identified, plans can be established for improving the various deficiencies in the building’s performance. 

heat loss in homes


Rectification plan

The results of these surveys allow the formation of a rectification plan. Some options for how to reduce heat loss in homes are: 

  • Sealing poorly sealed doors and windows
  • Sealing cracks in the building
  • Fixing poor seals around wall penetrations e.g. boiler flues
  • Cavity wall insulation
  • Solid wall insulation
  • Floor insulation
  • Roof and loft insulation
  • Draught-proofing

A work plan is formulated to allow the rectification of the various deficiencies. On completion of the works, a post-defect survey confirms that the work has been properly undertaken and the target efficiency levels have been met.


Fixing the issue of heat loss in homes is not just so you can be warmer. Your energy bill will go down drastically which, in the cost of living crisis we are in today, is a huge benefit. You would also be doing your part in the energy crisis. Reducing your own home’s energy usage will make a reduction in our national carbon emissions.


At airtightness solutions, we provide a variety of services that can help you rectify any heat loss or sound problems you may be having at your place of business or home. Contact us today to get an idea of how we can help you.

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