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Why We Must Embrace External Wall Insulation

October 26, 2025
  • #ClimateAction
  • #EnergyEfficiency
  • #ExternalInsulation
  • #UKHomes
  • #SustainableLiving
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Why We Must Embrace External Wall Insulation

Confronting the Resistance to Solid Wall Insulation

Climate change is not just an abstract concept—it's a pressing reality that we must confront with action, not hesitation. Jason Palmer's recent letter underscores the urgency of insulating the UK's 8.5 million solid-wall homes to meet our greenhouse gas reduction targets. Yet, negative press coverage about solid wall insulation (SWI) threatens to derail these essential efforts. The real question is: why should we abandon a critical solution when the focus should instead be on improving execution?

“Negative coverage about solid wall insulation (SWI) risks deterring people from insulating the UK's 8.5m solid-wall homes.” - Jason Palmer

Learning From the Past

It's true that past installations have faced scrutiny; Palmer points out that almost all external insulation fitted under the previous government's energy efficiency scheme was installed poorly. However, conflating this widespread failure with the inherent value of SWI is a misstep. We've known for at least a decade that poor-quality installations lead to catastrophic outcomes, emphasizing the need for enhanced training for installers rather than a retreat from SWI initiatives.

The Importance of Quality Assurance

Let's break down Palmer's argument further. The letter highlights the response rate from the 60,000 SWI installations funded by the government, with only 5,900 voicing concern over quality issues. This serves as a reminder that many installations were likely performed adequately, undermining the notion that SWI should be abandoned altogether.

  • Improving training programs for installers is paramount.
  • Quality checks must be integrated into the installation process.
  • Government initiatives should prioritize skilled labor in the retrofitting industry.

Rethinking the Narrative

It's easy to be swayed by sensational headlines, but we must focus on facts and context. As Palmer notes, the failure to meet stringent standards, like PAS 2035, should not automatically signify defects. Some studies reveal that solid wall insulation is often installed correctly, and with the right oversight, it can be executed effectively.

“True, solid wall insulation can go very wrong. However, this is no reason to abandon solid wall insulation.”

Conclusion: It's Time to Act

Solid wall insulation remains a viable, necessary solution in our fight against climate change, provided we challenge the current assumptions that threaten its implementation. Instead of shying away from SWI due to past failures, let's focus our efforts on refining the installation process, ensuring quality, and, more importantly, fostering a culture of skill development for installers.

To echo Palmer: abandoning solid wall insulation would not only misplace our priorities but put our climate goals at risk. We owe it to ourselves and future generations to do better, and more importantly, to act decisively now.

Source reference: https://www.theguardian.com/environment/2025/oct/26/no-reason-to-abandon-external-wall-insulation

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