In January 2026, MPs on the Public Accounts Committee published a highly critical assessment of two UK government insulation schemes, concluding they were so badly designed they were effectively “doomed to fail” from the outset.
The findings follow mounting evidence that tens of thousands of homes fitted with insulation since 2022 are now experiencing serious problems, including damp, black mould and, in some cases, structural damage. According to the committee, major defects have been found in over 30,000 homes linked to installations carried out under these schemes.
This article breaks down what the report says, why it matters, and what homeowners should take from it — without panic, exaggeration or political spin.
For full context, the BBC’s reporting on the committee’s findings can be read here:
Botched insulation scheme was ‘doomed to fail’, say MPs – BBC News
In short: this report is not a warning about insulation itself — it is a warning about what happens when insulation is delivered at scale without proper oversight, property suitability checks and a clear ventilation strategy.
What the report found
The Public Accounts Committee examined work carried out under the ECO4 and GBIS insulation schemes, both launched in 2022. These schemes were intended to improve energy efficiency, reduce emissions and help households lower their energy bills.
Instead, MPs found:
- widespread non-compliance by insulation installers,
- major defects in over 30,000 homes,
- evidence that problems were known but not acted on for almost two years, and
- fewer than 10% of affected homes had been fixed after problems emerged.
If you want background on how these schemes were intended to operate, this explains what ECO4 means for UK homeowners and why it has since been scrapped.
Why the schemes failed at a systems level
One of the most striking conclusions was that senior government officials paid “virtually no attention” to whether the schemes were actually working for their first two years.
This lack of oversight created conditions where:
- installation speed mattered more than suitability,
- compliance became a tick-box exercise,
- faults were not escalated early, and
- responsibility became fragmented across multiple organisations.
This matters because insulation is not a cosmetic upgrade. It changes how a building behaves — particularly in relation to airflow, moisture movement and drying cycles.
Health, safety and the reality inside affected homes
While the government has stated that it is “categorically untrue” there are widespread health and safety risks, MPs strongly disagreed.
The committee warned that delays in fixing faulty installations increase the likelihood of further damage, resulting in “immediate health and safety risks” where damp and mould are present.
Moisture-related problems often develop quietly. Internal living spaces can appear normal while conditions elsewhere in the structure worsen over time.
If you want a simple explanation of how this happens, this guide explains the physics of condensation in plain English.
What this report is — and isn’t — saying
| What the report highlights | What it does not claim |
|---|---|
| Poor oversight and weak enforcement can lead to widespread non-compliant installations | That insulation itself is inherently unsafe |
| Insulation can create damp and mould risk if ventilation is mishandled | That every government-backed installation is defective |
| Delays in remediation can increase damage and health risks | That problems always appear immediately after installation |
What homeowners should take from this
Even if your home was never insulated under these schemes, the report reinforces several important principles:
- insulation must suit the property, not the scheme,
- ventilation and moisture behaviour must be considered together,
- rushed installations increase long-term risk, and
- problems often surface years later, not immediately.
What comes next
Understanding what went wrong is the first step. The next is understanding why scheme-driven insulation work is particularly prone to failure.
In the next article, we look at
how scheme-driven insulation installations create risk for homeowners
— and how those risks can be identified early.
Frequently asked questions
Does this mean insulation is unsafe?
No. The report does not claim insulation is inherently unsafe. It highlights risks created when insulation is installed without proper assessment, ventilation planning and oversight.
Why would insulation cause damp or mould?
Insulation changes heat flow and air movement. If moisture cannot escape or dry out properly, damp and mould risk increases over time.
Should homeowners be worried about government-backed schemes?
Funding can be beneficial, but suitability still matters. Homeowners should ask clear questions about ventilation, assessment and long-term performance.
What’s the most important lesson from this report?
That insulation decisions should be property-led, not scheme-led. Process matters as much as materials.
