02/06/2026
Have you had external wall insulation installed under the Energy Company Obligation 4 (ECO4) scheme, or the Great British Insulation Scheme (GBIS)?
You may have seen news stories about problems with some work done under these national schemes. To provide reassurance, the Government is offering free checks of the installation quality. Any issues found will also be fixed at no cost to homeowners.
TrustMark are carrying out these free audits, and you can book yours by calling 0333 555 1234 (select option 1), emailing [email protected], or visiting their website -
Book your free TrustMark audit today. A qualified surveyor will inspect your home’s insulation, explain the results, and arrange any fixes at no cost.