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Our insulated glass units (IGUs) are designed to meet the evolving demands of modern construction. With rising energy costs and tighter building regulations, today’s projects need glazing that does more—enhancing thermal insulation, reducing noise, increasing security, and contributing to better energy efficiency ratings.
Double Glazing Glass Units
Precision-Made IGUs by Crystal Units – Leading London Glass Manufacturer
At Crystal Units, we understand that high-quality glazing matters—whether you’re a window installer, architect, builder, or a homeowner looking to upgrade. As a trusted London glass manufacturer with over 30 years of experience, we specialise in supplying advanced double glazing solutions that combine superior performance, long-term durability, and architectural versatility.
Insulated Glass Units (IGUs)
Whether you’re specifying glass for a residential renovation, a large-scale commercial build, or upgrading existing windows, our double glazing glass are engineered to deliver results. From Low-E and solar control coatings to Argon-filled cavities and warm-edge spacer technologies, we offer fully bespoke glass configurations that align with your project’s design, performance, and compliance needs.
Double Glazing Repair & Replacement
If you’re dealing with misted windows, condensation between panes, or damaged glass, it’s a clear sign the unit’s seal has failed. Rather than replacing the entire window frame, Crystal Units can supply replacement IGUs that fit existing frames—saving time and reducing costs. We manufacture to precise measurements, ensuring seamless retrofitting and restoring your glazing’s energy efficiency and appearance.
Our IGUs are perfect for both residential and commercial window repairs, making us the go-to glass supplier in London for fast turnaround and exceptional quality.
Upgrading to Double Glazing – Ideal for Heritage Properties
Upgrading to modern double glazing brings substantial benefits, especially in older or heritage buildings. Many period properties suffer from draughts, condensation, and poor insulation due to outdated single-glazed windows. Crystal Units offers slimline IGUs and bespoke solutions that retain the building’s original character while vastly improving comfort and energy efficiency.
Our range includes low-profile glazing suitable for timber frames and conservation areas, helping to enhance sustainability without compromising aesthetics. We’ve worked on notable heritage projects across London and the UK, supporting architects and conservationists with compliant, high-performance glazing.
Considering Triple Glazing? Discover C.U.in
If you're working on a project where maximum insulation is essential—such as Passivhaus builds or ultra-low-energy homes—ask us about C.U.in™, our innovative triple glazing solution. It uses a suspended film between panes to achieve U-values as low as 0.4 W/m²K in a lighter, slimmer unit than traditional triple glazing. It's perfect for projects that demand high thermal performance without bulky frames.
Looking for a reliable London glass manufacturer for your next project?
Get in touch with Crystal Units today to discuss your double or triple glazing requirements. From specification to delivery, we’re here to help you build better.