In January 2025, the government took action against some installers of poor-quality solid wall insulation in homes under the GBIS/ECO scheme (click here for more details). The government suspended 39 businesses from installing new insulation, and ordered the companies responsible for the poor work to fix it. Households should not be asked to pay for the repairs. 

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What happened? 

  • The government discovered widespread poor-quality insulation in homes that were built under the Energy Company Obligation 4 (ECO4) and Great British Insulation Scheme (GBIS).
  • The independent body TrustMark found issues such as missing paperwork, insufficient ventilation, and exposed insulation.
  • The government ordered the energy regulator, Ofgem, to oversee the repairs.


What will happen next? 

  • Ofgem will send letters to affected households to determine if repairs are needed.
  • If repairs are needed, the certification body or TrustMark will arrange for them.
  • The companies responsible for the poor work will pay for the repairs.


Who should I contact if I have concerns? 


What do I do if I want to make a complaint about work carried out under ECO4 or GBIS?

  • The installer should correct any issues you have with retrofit work, reach out to them in the first instance.
  • If you continue to have issues you can find information on the complaints process here: https://www.ofgem.gov.uk/eco4-complaints-process