A U-value is the definitive measure of heat transfer. While standard double glazing typically lingers around a 2.8 rating, SlimLite™ Krypton units reach an impressive 1.4W/m²K or lower.
By replacing the air in the cavity with dense Krypton, we create a superior insulating barrier. This allows us to achieve the thermal targets required for modern living within the thin, delicate profiles demanded by historic timber frames.
For the owner of a historic home, a low U-value is the key to comfort. We help you navigate the requirements of conservation officers, ensuring you achieve the thermal performance required by law while protecting your property’s irreplaceable character.
Conservation officers know that protecting a building’s integrity requires specialist solutions. SlimLite™ units fit seamlessly into existing frames, maintaining the glazing bars and proportions that define a conservation area.
With U-values from 1.4 W/m²K and sightlines as slim as 6mm, we provide the best way to upgrade a heritage property without a hint of visual compromise.
Krypton’s dense molecular structure is the secret to our low U-values in slim profiles. For those seeking the absolute peak of technology, our LandVac units eliminate the cavity gas entirely, using a vacuum to achieve a staggering 0.4 W/m²K at just 8.3mm thick.
This is the ultimate thermal solution for the world’s most sensitive buildings.
Contact our knowledgeable team today to discuss specifications, performance requirements, and obtain competitive pricing for your project.
Find answers to common questions about U-values and thermal performance in slim double glazing for heritage and listed properties across the UK.
Quality slim double glazing with krypton fill should achieve U-values between 1.4-2.1 W/m²K, while vacuum glazing like LandVac reaches 0.4 W/m²K in heritage-appropriate slim profiles.
Slim units achieve similar or better U-values than standard double glazing but with thinner profiles suitable for timber windows, sash windows, and historic properties in conservation areas.
Yes, upgrading from single pane (U-value 5.0) to slim double glazing (U-value 1.4) dramatically reduces heat loss, lowering heating costs while maintaining your property's character.
Krypton-filled slim double glazing or vacuum glazing provides excellent thermal performance with minimal sightlines, satisfying conservation officers while improving U-values and reducing heat loss effectively.
Triple glazing achieves lower U-values but is often too thick for historic windows. Slim double glazing with krypton or vacuum glazing balances performance with conservation area requirements.
Want to learn more about our heritage glazing solutions? Our knowledgeable team is here to answer your questions and guide you through your project. Complete our contact form today, and we’ll be in touch as soon as we can.
Get Directions