- Features and Benefits
- Maintenance & Aftercare
Why SlimLite™ is the Steel Window Specialist
Our glass is engineered for the slimmest Crittall and heritage steel profiles. We provide superior thermal performance without altering the characteristic look of your frames. From original windows in conservation areas to modern steel profiles, we offer quality that lasts a lifetime.
Ultra-Slim Sightlines
From 11mm to suit narrow steel profiles while maintaining authentic proportions
Superior Thermal Efficiency
U-values from 0.4W/m²K dramatically reduce heat loss through exterior windows
Conservation Approved
Specifically designed for steel frame windows in protected buildings
Heritage Authentic
Preserves the style of your home with appropriate panes of glass configuration
Lightweight Design
Complements the inherent strength of steel frames without excessive weight
Caring for Steel Window Glass
Slimlite steel window glass requires minimal maintenance while delivering long-term performance. Our vacuum glazing units are toughened as standard for durability, while sealed units provide reliable thermal efficiency over a long way into the future. Regular cleaning and inspection ensure your steel windows maintain their appearance and performance for good reason.
- Trade supply units: 5-year guarantee against seal failure
- SlimVac™ vacuum glazing: 15-year guarantee
- Complete installations: 10-year maintenance-free guarantee
- Optional lifetime maintenance packages available
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Bronze Casement
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Custom
SlimLite™ glazing can be tailored to fit bespoke windows, balancing aesthetics and insulation.
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Casement
SlimLite™ glazing perfectly fits casement windows, keeping homes warm while preserving a classic look.
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Sash
Upgrade sash windows with SlimLite’s energy-efficient glazing, ideal for heritage properties.
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Frequently Asked Questions
Find answers to common questions about our specialist glazing solutions for Crittall and heritage steel window frames.
Our SlimVac vacuum glazing achieves 11-12mm sightlines at just 8.3mm total thickness, making it ideal for the slimmest profiles of heritage Crittall and steel frames while delivering exceptional thermal efficiency.
Yes, our ultra-slim glazing units are specifically designed to retrofit into existing steel window frames. SlimVac suits narrow steel profiles while Authentic SlimLite™ accommodates slightly wider frames without modification.
For steel frames, vacuum glazing is a better material choice – it delivers equivalent thermal performance to triple glazing within much slimmer dimensions that suit narrow steel profiles and preserve authentic slim sightlines.
Yes, our SlimVac and Authentic SlimLite™ glazing options exceed current building regulations for thermal efficiency, achieving window energy ratings suitable for new builds and replacement windows while maintaining heritage aesthetics.
Yes, our ultra-slim glazing solutions are specifically designed for conservation areas. SlimVac maintains authentic slim sightlines while delivering modern thermal performance, satisfying both heritage and efficiency requirements.
SlimVac Vacuum Glazing – Perfect for Steel Frames
SlimVac is the superior choice for steel. It delivers world-class efficiency without ruining the narrow sightlines that define the look. At 8.3mm thick, it fits narrow steel profiles perfectly while hitting an outstanding 0.4W/m²K U-value.
This is the only choice for the most demanding specifications.
Traditional Slim Double Glazing for Steel Windows
For wider steel profiles, our Authentic and Original ranges offer proven reliability. Filled with krypton or argon, these units provide insulation that single glazing simply cannot match.
It’s a smart investment for residential or commercial projects that require value and low-maintenance performance.
Your Path to Exceptional Heritage Windows
We transform the intricate process of upgrading heritage windows into a seamless experience. From initial consultation through to installation and ongoing aftercare, our specialist team champions your project at every stage.
Consultation and Assessment
Our heritage experts visit your property or project site to evaluate existing windows, understand your vision, and recommend the best approach. We navigate conservation area requirements and support planning application preparation with authority.
Bespoke Design and Quotation
No two heritage properties share the same story. We develop comprehensive proposals detailing how our slim units will complement your frames, glass specifications and sight lines. Expect transparent pricing and honest project timelines.
Precision In-House Manufacturing
Your bespoke glass units are crafted to exacting specifications at our dedicated facility. Every unit undergoes stringent quality verification, confirming sealant integrity, gas retention, and full BS EN 1279 compliance before dispatch.
Expert Installation and Aftercare
Whether collaborating with your chosen installer or our approved network, we deliver comprehensive support. All installations carry guarantees against failures, with our team available for ongoing guidance and maintenance advice.
Get in touch
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.
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