If you live in one of the eight million homes in the UK that does not have adequate loft insulation, you can quickly and easily save hundreds of pounds on this year’s energy bills.

Back view of adult couple watching TV at home while sitting on sofa lit by warm cozy light, copy space

In just one weekend, you could do the work yourself at a cost of £680 for a typical semi-detached house – and you could reduce heat wasted by 25 per cent meaning your home is cosier throughout the winter. 

Loft insulation can last for up to forty years when fitted correctly, so the savings on energy bills continue for decades. It will also improve your Energy Performance Certificate (EPC) rating and therefore improve the value of your home.

Find out more about the costs and savings that apply to your house type and current insulation level with our quick questionnaire. 


If you want to find out more about other energy saving measures in the home, watch our video and download One Home’s guide for easy money saving tips for all budgets.

This information is based on independent research by Energy Saving Trust.  

Estimates are based on insulating a gas-heated home, and UK fuel prices in July 2023. 

The recommended depth of mineral wool insulation is 270mm, but other materials need different depths.  

The estimated costs for professional installation are unsubsidised and prices will vary.  

Some people are eligible for government support schemes to help with energy bills and home energy efficiency improvements.  

Loft insulation typically lasts for 40 years. This means it should pay for itself many times over in that lifetime.

If you rent your home, you will need to discuss installing loft insulation with your landlord.

Find out more about loft insulation.

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This information is provided for guidance only. Please see the full disclaimer in our terms and conditions.

DIY cost estimates include VAT. Professional installer estimates exclude VAT as this is not applied to insulation services.