- Features and Benefits
- Maintenance & Aftercare
The Only Choice for Discerning Homeowners
Our solutions combine relentless innovation with respect for the craft. Specifically engineered for heritage timber, our products meet the demands of the most prestigious projects. From original sashes to traditional casements, we provide glazing that stands the test of time.
Ultra-Slim Profile
Authentic sightlines from 6mm suit 7mm rebates in heritage window frames
Superior Insulation
U-values from 0.4W/m²K outperform secondary glazing and standard double glazing
Conservation Approved
Specially designed for listed buildings and conservation areas nationwide
Energy Savings
Exceptional heat retention dramatically reduces energy bills
Property Value
The right choice to protect and increase the value of your home
Caring for Your Heritage Glazing
Slimlite glazing is designed for low maintenance and long-term performance. Our units come with comprehensive guarantees and require only routine care to maintain their appearance and thermal efficiency. We recommend leaving protective film in place until installation completion and using appropriate cleaning products on timber window frames.
- Trade supply units: 5-year guarantee against seal failure
- Vacuum glazing units: 15-year guarantee
- 10-year maintenance-free guarantee on complete window installations
- Optional lifetime maintenance packages available
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Frequently Asked Questions
Find answers to common questions about our specialist glazing options for timber windows in heritage properties and conservation areas.
SlimLite™ and SlimVac vacuum glazing are specifically designed for listed buildings, offering ultra-slim sightlines that maintain authentic appearance while meeting modern thermal standards.
SlimLite™ achieves sightlines as slim as 6mm for 7mm rebates, matching original single glazing profiles while delivering superior insulation and energy efficiency.
Yes, our ultra-slim glazing units are specifically designed to retrofit into existing timber window frames, including original sash windows and casement windows without modification to frames.
SlimVac vacuum glazing offers the best thermal performance at 0.4W/m²K. For standard applications, SlimLite™ with krypton provides excellent heat retention with U-values from 1.4W/m²K.
Complete window installations include a 10-year maintenance-free guarantee. We also offer optional lifetime maintenance packages similar to premium timber care services for very long term protection.
Authentic SlimLite™: The Industry Benchmark
The pinnacle of heritage double glazing and engineered for original windows with shallow rebates, Authentic SlimLite™ provides insulation far superior to secondary glazing.
The natural insulation of timber paired with our krypton-filled units creates a window that feels modern but looks centuries old.
SlimVac Vacuum Glazing – Ultimate Performance
SlimVac vacuum glazing is the future of heritage technology. With a staggering U-value of 0.4W/m²K, it outperforms almost everything else on the market.
At just 8.3mm thick, it fits existing wooden frames seamlessly and is backed by a 25-year guarantee for total confidence.
Complete Window Solutions with Gowercroft Joinery
For properties where original windows are damaged beyond repair or replacement is permitted, SlimLite partners with Gowercroft Joinery to provide heritage timber windows of exceptional quality. These traditionally crafted wooden windows feature authentic joinery techniques combined with modern engineering, offering the perfect solution for period property owners.
All Gowercroft timber windows can be fitted with your choice of glazing: standard double glazing, triple glazing, or our specialist SlimVac vacuum glazing. Available in engineered Red Grandis or premium Accoya timber, this flexibility ensures the right solution for your specific conservation requirements and budget.
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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