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The Heritage Glazing Authority

We invented ultra-thin double glazing for listed buildings.

Complete Conservation Service

From planning applications to final installation, we're with you.

Unmatched Certification Standards

One of only two UK companies holding full BS EN 1279 Parts 1-6 certification.

Authentic Slim Sightlines

Preserve architectural integrity with 6mm sightlines – the slimmest available.

The Specification You Can Trust

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SlimLite is one of the most recognised names in heritage glazing. Regularly specified by architects nationwide, our ultra-thin double glazing units are fully certified to BS EN1279 –  including parts 2 and 3, making us one of only two companies in the UK to hold this compliance. When your project demands precision, performance, and conservation approval, SlimLite delivers.

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vacuum glazing

LandVac Vacuum Glazing

LandVac vacuum glazing offers maximum insulation in slim units, perfect for heritage or modern windows.

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Technology

Innovative gas-filled glazing technology that locks in warmth, cuts energy bills, and reduces noise.

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Double Glazed Units

SlimLite™ double glazing keeps your home warm, energy-efficient, and quiet without compromising style.

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About Us

UK's leading heritage glazing specialists, preserving character properties without compromising performance.

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Technical Specifications and Performance Data

Seeking comprehensive specifications for our slimline double glazing systems? Our technical section presents detailed information on thermal characteristics, glass compositions, spacer materials, and installation protocols. Whether evaluating alternatives to secondary glazing or clarifying U-values for planning submissions, we've put together everything required to make confident decisions for your period property.

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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.
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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.

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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.

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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.

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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.

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"Great service along with a quality product, also the best advice on the different types of the slimlite range."

Martin

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"Great high quality product, does exactly what it is supposed to i.e. significant improvement in thermal insulation and noise reduction. I had an issue with the order which was immediately resolved. Would thoroughly recommend."

Duncan

via Trustpilot

"Experts in their field, a well run family business. Pleasure to deal with. Good communicators and they produce a quality product."

James Sunderland

via Trustpilot

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