Why Glazing Matters for Health and Comfort

Guest: Ruth Henderson, Managing Director, Vacuum Glazing Network 
Host: Andy Cameron-Smith, Communications Director, Healthy Homes Hub 

Vacuum glazing may not sound exciting—but as Ruth Henderson explains, it could quietly transform the health, comfort, and carbon performance of UK homes. In this episode, Ruth shares her unexpected journey from special needs education to leading innovation in glazing, and why windows deserve a central role in retrofit and decarbonisation strategies. 

Key insights: 

• Glazing is a health issue: Beyond energy efficiency, good glazing prevents condensation and mould, stabilises indoor temperatures, and reduces noise—improving comfort, sleep, and wellbeing. 

• Retrofit potential: With 80% of the buildings that will exist in 2050 already standing, improving existing windows is crucial. Vacuum glazing such as PassivGlas™ allows landlords to upgrade performance dramatically without replacing frames, cutting waste, cost, and disruption. 

• Affordability and longevity: With a 30-year lifespan and minimal installation impact, vacuum glazing provides landlords and housing providers a realistic route to meeting EPC C targets. 

• Health and comfort benefits: Schools, offices, and homes report quieter, more stable internal environments, less condensation, and lower energy bills. 

Useful links: 

• Energy Performance Certificate (EPC) standards 

• Historic England guidance on vacuum glazing 

• PassivGlas YouTube channel 

Practical steps for housing providers 

1. Audit your housing stock for underperforming windows; assess condensation, mould, and noise issues. 

2. Explore vacuum glazing retrofits as a cost-effective way to upgrade existing frames without sending materials to landfill. 

3. Work with accredited installers and request verified U-value performance before procurement. 

4. Consider pilot studies to collect temperature, humidity, and sound data before and after installation.