22
Not Addressed
The guarantee market for solid wall insulation is notably limited to only three providers.
Conclusion
TrustMark told us that three organisations provided the bulk of the cover.47 In written evidence provided after the oral evidence session, the Department confirmed that the guarantee market for solid wall insulation is limited to three companies: QualityMark Protection, which provides regulated insurance-backed guarantees through SafeWorld; and SWIGA and CIGA/IAA, which are asset-backed guarantees.48
Government Response Summary
The government states that all EWI and IWI measures installed under ECO4 and GBIS schemes should have a guarantee that lasts for 25 years.
Government Response
Not Addressed
Government Response
Not Addressed
HM Government
Not Addressed
1.5 All EWI and IWI measures installed under ECO4 and GBIS schemes should have a guarantee that lasts for 25 years, meaning should issues be found in the future, the protections within the guarantee can be invoked within this timeframe.
Source
Committee
Public Accounts Committee
Report
62nd Report - Faulty energy efficiency installations
23 Jan 2026
HC 1229
Addressee Bodies
HM Treasury
Timeline
Recommendation age
0.4 yrs
Report published
23 Jan 2026