|Loft insulation||No insulation to 270mm*||Adding 120mm to existing 150mm*|
|Fuel bill savings (£ / year)||£140||£15|
|Installation cost (typical semi-detached house)**||£300||£250|
|CO₂ savings (kg CO₂ / year)||580kg||55kg|
* UK government guidelines now stipulate a minimum insulation depth of 270mm.
** Everyone is potentially eligible for 50% – 100% grants, please look at grants section below.