Take a look at the tables below showing average yearly savings gained when installing cavity wall insulation or loft insulation. As you can see it's not all about what you can save financially but it's about caring for the environment and especially reducing carbon emissions which the UK has committed to reduce to Net 0% by the year 2050.
The UK government also has a target to get all fuel poor homes to an EPC band of C by the year 2030 plus a further target of getting nearly all homes to an EPC band of C by the year 2035.
England, Scotland & Wales Loft Insulation (0 to 300mm)
|Detached house||Detached bungalow||Semi detached||Mid terrace|
|Fuel bill savings (£s/year)||£255||£210||£150||£140|
|Carbon dioxide savings (kgCO2/year)||970kg||830kg||610kg||560kg|
England, Scotland & Wales Cavity Wall Insulation
|Detached||Semi detached||Bungalow||Mid terrace||Flat|
|Fuel bill savings (£s/year)||£285||£170||£120||£115||£95|
|Carbon dioxide savings (kgCO2/year)||1050kg||670kg||460kg||410kg||340kg|
All figures are approximate and are based on average UK household energy usage.