Thinner, Warmer, Quieter, Better.
Bringing innovation and comfort together. Vacuum glazing is a revolutionary step toward lower energy bills and achieving Passive House standards.
At GK Joinery, we’re proud to offer PassivGlas™ – a next-generation vacuum-insulated glazing solution that delivers outstanding thermal and acoustic performance in an ultra-slim design.
Whether you're upgrading a period home or building something brand new, PassivGlas™ helps you achieve modern energy efficiency without compromising on appearance or character.
Why choose vacuum glazing?
- Unmatched insulation
PassivGlas™ offers incredibly low U-values, helping to keep homes warmer in winter and cooler in summer – without the bulk of triple glazing. - Peace and quiet, built in
Its advanced construction significantly reduces external noise, making it ideal for homes in busy or urban areas. - Slimline, lightweight design
At just over 6mm thick, PassivGlas™ can often be fitted into existing window frames – ideal for retrofits and sensitive conservation areas. - Long-lasting performance
Thanks to toughened glass and a strong vacuum seal, these units are built to last and keep performing year after year. - Eco-conscious choice
Lower energy use means lower bills and a reduced carbon footprint – all while maintaining a comfortable home environment.
Perfect for heritage and contemporary homes
Whether you're looking to preserve traditional timber windows or enhance a new build with cutting-edge performance, PassivGlas™ offers flexibility and finesse. It's particularly well-suited to listed buildings, conservation areas, and projects where both efficiency and aesthetics matter.




Interested in finding out more?
We’re here to help. Talk to our team about how PassivGlas™ can work in your home or project.