The Great British Insulation Scheme (GBIS) is a government energy efficiency programme administered by Ofgem, designed to help households in Great Britain improve their home's energy performance. Launched in April 2023 and scheduled to run until April 2026, the scheme aims to tackle fuel poverty and reduce energy bills by providing free or discounted insulation to eligible properties. It operates as a complement to the Energy Company Obligation (ECO4) scheme, focusing primarily on single insulation measures rather than a whole-house approach. The scheme places an obligation on medium and large energy companies to deliver measures that reduce energy usage, thereby helping to lower costs for consumers and improve home comfort.
The GBIS is available to a broad range of households, not just those on low incomes. Eligibility is determined by specific property characteristics. Homes with an Energy Performance Certificate (EPC) rating of D to G are eligible, as are properties within Council Tax bands A-D in England and A-E in Scotland and Wales. This means many households in less energy-efficient homes can access support, regardless of their income. The scheme is open to homeowners, landlords, and tenants, although tenants are required to obtain their landlord's approval before any work can be carried out.
The insulation options available through the GBIS are tailored to individual home needs and can include cavity wall insulation, loft insulation, solid wall insulation, underfloor insulation, roof insulation, and room-in-roof insulation for converted spaces. The specific type of insulation recommended will depend on a survey conducted by an accredited installer. The primary benefit of these measures is a reduction in heat loss, which can account for a significant portion of a household's energy expenditure. For instance, around 33% of heat is lost through uninsulated walls alone. By improving insulation, households can expect more consistent indoor temperatures, increased comfort, and lower energy bills, as less energy is required for heating and cooling.
The process for accessing the GBIS typically involves several steps. Eligible households can apply through their energy supplier, although it is noted that some suppliers may still be accepting applications while others have closed their intake. An alternative route is to connect with accredited installers via platforms that match homeowners with local providers. Once an application is submitted, an assessment of the property is arranged. Following this assessment, the installer will determine if any contribution is required from the homeowner towards the installation cost. The scheme aims to provide free insulation, but some households may be asked to contribute if the cost of the recommended measure exceeds the grant value. It is important to note that installations must be completed by 31 March 2026, and applications are accepted until 31 January 2026 to allow time for installation before the scheme concludes.
While the GBIS offers significant benefits, there are considerations for consumers. The quality of installation is critical, and the scheme has acknowledged issues with some solid wall insulation fitted under the programme. Households with concerns about existing installations are advised to check the Ofgem energy company obligation complaints guidance. When selecting a provider, it is essential to choose an accredited installer to ensure work meets regulatory standards and to avoid potential pitfalls such as poor workmanship, hidden costs, or delays. Reputable organisations that specialise in grant applications can help navigate the process and connect households with trusted, accredited installers.
In summary, the Great British Insulation Scheme presents a valuable opportunity for many UK households to improve their home's energy efficiency at little to no cost. By targeting properties with lower energy performance ratings, the scheme helps reduce energy bills, combat fuel poverty, and contribute to environmental goals. Prospective applicants should verify their eligibility based on their EPC rating and Council Tax band, and carefully follow the application process through their energy supplier or a trusted intermediary to ensure a successful and satisfactory installation.