Tens of Thousands of UK Homes Require Urgent Repairs After Government Insulation Blunder

Published: 14 October 2025 | The English Chronicle Desk | The English Chronicle Online

A damning report by the National Audit Office (NAO) has revealed that two major government-backed home insulation schemes in the United Kingdom have failed catastrophically, leaving tens of thousands of properties across the country in dire need of repair.

The NAO found that nearly all homes insulated through the programs—launched under the previous government to reduce energy consumption—were plagued by severe defects. According to the watchdog, a staggering 98% of homes with external wall insulation and 29% of homes with internal insulation have been found to have faults likely to cause dampness, mould, and even serious health risks if not promptly repaired.

The schemes in question—ECO4 and the Great British Insulation Scheme—were introduced in 2022 with the intention of cutting energy bills and improving energy efficiency in homes, particularly for low-income households and those living in poorly insulated buildings. However, the NAO has concluded that “clear failures in design and oversight” led to widespread poor-quality work, systemic mismanagement, and in some cases, suspected fraud.

Under the Energy Company Obligation (ECO), energy firms were directed to invest billions—funded through consumer energy bills—to carry out insulation improvements nationwide. Instead of delivering energy-efficient homes, the initiative has left thousands of families living in dangerous and unhealthy conditions.

Gareth Davies, the head of the NAO, stated that it was now the Department for Energy Security and Net Zero (DESNZ)’s responsibility to ensure all affected homes are repaired urgently. “It must also reform the system so that such widespread failures cannot happen again,” he warned.

The NAO report pointed to multiple root causes, including a poorly trained workforce, contractors cutting corners to reduce costs, and confusion over which construction standards should be applied to different types of insulation work. The result has been catastrophic for homeowners—many of whom now face damp, mould, and structural issues that threaten both health and safety.

In some cases, the consequences have been life-threatening. The report noted that over 1,000 households are currently living in homes with immediate safety risks, including exposed live electrical wiring and blocked boiler ventilation systems.

One homeowner, Mohammed Mahedi from Luton, said that the external insulation installed at his home two years ago had made conditions worse instead of better. “Some mornings I wake up breathing really heavily. I feel it in my neck and lungs,” he told the BBC. “We got a scheme that was supposed to help us, but it’s made everything worse.”

External insulation typically involves attaching insulation boards to a home’s outer brickwork and covering them with render to prevent water damage. However, when poorly installed, rainwater becomes trapped behind the boards—creating the perfect environment for mould and damp to spread.

Energy Consumer Minister Martin McCluskey acknowledged the seriousness of the issue, assuring the public that the government was taking steps to address the problem and that homeowners would not bear the cost of the repairs. “All necessary remedial work will be carried out at no cost to the consumer,” McCluskey confirmed.

The NAO estimates that between 22,000 and 23,000 homes with external wall insulation, along with up to 13,000 homes that received internal wall insulation, will need urgent remedial action.

As the government moves to contain the fallout from one of the largest public infrastructure mismanagements in recent years, critics are calling for stronger oversight, tougher contractor vetting, and clearer accountability for those responsible. The scandal has also reignited debate over the efficacy and monitoring of taxpayer-funded green energy initiatives—a debate that may now reshape how the UK approaches its climate and housing policies in the years to come.