Faulty External Wall Insulation: Major Issues Found in UK Homes

Faulty External Wall Insulation: Major Issues Found in UK Homes

Thousands of UK homeowners are facing serious issues after a new government report revealed that up to 98% of external wall insulation (EWI) installed under government-backed energy schemes may be faulty, unsafe or non-compliant.

At EdgeHire4Homes, we’re keeping a close eye on this developing story, as many homeowners affected by poor insulation are now dealing with damp, mould, leaks and long-term moisture damage — issues that often require specialist drying equipment and professional assessment.

Government Audit Finds 98% Failure Rate in External Wall Insulation

The government’s audit of insulation work carried out under the ECO4 and GBIS schemes has exposed widespread problems:

• 92% of homes with external wall insulation had at least one major defect.
• 6% were classed as “Category 1” risks — posing a direct threat to health or safety.
• Overall, 98% of installations showed major or severe non-compliance.
• Internal wall insulation (IWI) also fared badly — 27% had major issues, and 3% were dangerous.

These issues include poor workmanship, inadequate ventilation, trapped moisture, exposed wiring, and even carbon monoxide risks.

According to the report, more than 22,000 homes with EWI and up to 13,000 homes with IWI now need urgent remedial work.

What’s Gone Wrong with External Wall Insulation?

External wall insulation is meant to make homes more energy-efficient by trapping warmth and reducing heating costs. However, when installed incorrectly, it can seal in moisture, block airflow, and cause structural damp — leading to mould growth, rot, and long-term wall damage.

The audit found several key failings:

• Use of unqualified subcontractors
• Poor installation standards and inspection processes
• Weak regulation and oversight
• Allegations of fraud in scheme claims worth up to £165 million

In some cases, these issues have been so severe that homeowners can’t sell or remortgage their properties until the insulation is repaired.

What Homeowners Should Do

If your home received insulation under ECO4 or GBIS, here’s what you can do:

1. Check your property records to confirm whether EWI or IWI was installed under these schemes.
2. Look out for government letters or Ofgem notifications offering a free inspection or audit.
3. Do not pay for repairs yourself — the government has committed to covering the cost of defective installations.
4. Inspect your home for signs of damp, mould, condensation, or peeling paint.
5. Document any issues and contact a qualified moisture control specialist or drying equipment provider for independent advice.

How EdgeHire4Homes Can Help

At EdgeHire4Homes, we work with homeowners, landlords and insurers to tackle damp, leaks and moisture damage — often the hidden consequences of poor insulation work.

Our professional drying and dehumidification equipment can:

• Reduce moisture levels after insulation removal or repairs
• Prevent further damp and mould growth
• Support building surveys and drying assessments
• Help restore your home to a safe, dry condition

If your home has been affected by faulty insulation or damp, contact EdgeHire4Homes today for friendly advice and fast, reliable equipment hire.