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 properties in Wales waiting for remedial work as a result of work undertaken through the (a) ECO4 scheme and (b) Cavity Insulation Guarantee Agency.

All insulation under ECO4 must be installed by a TrustMark-registered installer, and covered by a TrustMark approved 25 year guarantee. The Government has previously published guidance for consumers who suspect that they may have faulty cavity wall insulation installed in their home outlining the routes to redress under these circumstances.

Cavity Insulation Guarantee Agency (CIGA) is a non-profit organisation that provides guarantee certificates for cavity wall insulation measures. The Department has no oversight of CIGA’s business activities, or the number of certificates issued by it, or where these have been called upon for remediation.