Home / Campaigns / The Big Loft Insulation Drive / Costs and savings / Detached house with no insulation Detached house with no insulation Annual saving – £475 Professional installation cost – £1200 Professional installation payback time – 2.5 years DIY installation cost – £970 DIY installation payback time – 2 years Annual CO2 saving – 1000kg There is a lot of heat escaping though your roof which could be reduced by installing loft insulation. A typical detached house can save £475 per year A typical detached house can save £475 per year through savings on energy bills as a result of having loft insulation. The typical cost of getting an installer to fit loft insulation in a detached house is £1200. This means the time it takes to pay back this investment in your home would be 2.5 years. The typical cost if you decide to install loft insulation yourself is £970. This means the time it takes to pay back this investment in your home would be 2 years. A professional installer can get the job done in as little as an afternoon, or doing it yourself could take just one weekend. If you aren’t sure which is right for you, look at our guide for choosing DIY or professional installation. Loft insulation will immediately make your home feel more cosy, keeping the heat in on cold days. In summer it also helps keep your house cooler when the weather is hot. You will be helping the planet too, saving 1000kg of CO2 emissions every year Loft insulation means you will use less gas to heat your home. So you will be helping the planet too, saving 1000kg of CO2 emissions every year. Some people are eligible for government support schemes to help with energy bills and home energy efficiency improvements. 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 estimated costs for professional installation are unsubsidised and prices will vary. The recommended depth of mineral wool insulation is 270mm, but other materials need different depths. 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. Join the conversation #KeepTheHeat Get involved In partnership with: Disclaimer 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.