Calculate potential savings from insulating your home (loft, cavity wall, floor).
Already insulated?
Annual Saving
£492
Payback: 4.3 years
Cavity wall
£240/yr
Cost: £800 | 3.3 yrs
Floor insulation
£72/yr
Cost: £1,000 | 13.9 yrs
Proper home insulation is one of the most effective ways to reduce your energy bills and improve your home's comfort. Heat naturally flows from warmer to cooler areas, meaning you lose heat to the outdoors in winter. Insulation slows this process down, keeping your home warmer for longer and reducing the workload on your heating system.
The potential savings vary significantly based on your property type, its current insulation levels, and your annual heating costs. This Calculator Site tool helps you estimate the financial benefits of adding loft, cavity wall, and floor insulation. For a detailed look at your heating system's needs, you might also find our Gas Heating BTU Calculator useful.
Quickest Payback
For most homes, loft insulation offers the fastest return on investment. It's relatively inexpensive to install and can pay for itself in just 1-3 years through lower heating bills. Even if your loft is already insulated, topping it up to the recommended 270mm can still lead to significant savings.
The numbers highlight how much heat and money can be saved. Uninsulated homes can lose up to a third of their heat through the walls and a quarter through the roof.
~£590/yr
Potential saving for a detached house
1-3 Years
Typical payback for loft insulation
25%
Heat lost through an uninsulated roof
These figures are estimates from the Energy Saving Trust. Actual savings depend on your specific home and energy habits. To get a complete picture of your household costs, you can use our comprehensive Energy Bill Calculator.
How to use this Calculator Site tool
Simply select your house type, enter your approximate annual heating bill, and check the boxes for any insulation you already have installed. The calculator will instantly show your potential annual savings, the estimated installation cost, and the payback period for each type of insulation you don't yet have.
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