Calculate potential savings from insulating your home (loft, cavity wall, floor).
Already insulated?
Annual Saving
£492
Payback: 4.3 years
Loft insulation
£180/yr
Cost: £300 | 1.7 yrs
Cavity wall
£240/yr
Cost: £800 | 3.3 yrs
Floor insulation
£72/yr
Cost: £1,000 | 13.9 yrs
Insulation is one of the most cost-effective ways to reduce heating bills. The savings depend on your house type, current insulation, and heating costs.
Understanding your home energy usage is the first step towards reducing your bills. You may also find our Gas Heating BTU Calculator useful for related calculations.
For a broader view of your finances, try the Energy Bill Calculator or the Percentage Calculator. All of our calculators are free to use and updated for the 2026/27 tax year where applicable.
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