Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what estimate he has made of the number of homeowners who installed loft spray foam insulation during the period in which it was eligible under Government-backed energy efficiency schemes.

Schemes run by the Department for Energy Security and Net Zero do not have a list of eligible products but require that assessments are made and designs produced for properties individually, with the most appropriate measures installed to the required standard.

Official statistics of government schemes are collected by measure rather than product. Under the Green Homes Grant Voucher Scheme there were 6,217 pitched roof loft insulation measures installed. As of August 2025, ECO 4 had installed 1,698, and GBIS 130. Spray foam is not the only product used for this measure, so the precise number will be lower.

Official statistics for the schemes can be found here: GHG Vouchers: Green Homes Grant and Home Upgrade Grant statistics - GOV.UK

ECO: Household Energy Efficiency Statistics - GOV.UK

GBIS: Great British Insulation Scheme - GOV.UK