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Retrofit measures under ECO4 and GBIS
13 October 2025
Type
Written Ministerial Statement
Department
Department for Energy Security and Net Zero
At a Glance
Issue Summary
The statement addresses widespread issues with solid wall insulation installations under ECO4 and GBIS schemes due to poor contractor standards and inadequate oversight.
Action Requested
Immediate steps include offering comprehensive on-site audits for affected households, strengthening safeguards in the system, and conducting a sweeping overhaul of consumer protection. Longer-term reforms will be detailed in the Warm Homes Plan with consultations planned for early next year.
Key Facts
- ECO4 commenced in 2022 and GBIS in 2023.
- Around 65,000 households have received solid wall insulation under these schemes.
- Independent audit results show that 92% of external wall insulation installations and 27% of internal wall insulation installations were found to have major technical non-compliance issues.
- A small percentage (6% EWI and 3% IWI) pose potential risks to health or safety requiring immediate rectification within 24 hours.
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