Three Reynaers Window Systems for Every Specification
Zyle Fenster supplies and installs three Reynaers aluminium window systems: the Ultra Slim SL38, the High Insulation ML8, and the CW50 curtain wall. Each system has been developed to meet a different set of architectural and thermal specifications – giving architects, homeowners, and specifiers the configuration choices to match the demands of virtually any project.
Reynaers SL38: Ultra-Slim Aluminium Windows
The Reynaers SL38 is an ultra-slimline aluminium window system designed to bring a steel-look aesthetic to contemporary architecture without the weight or thermal limitations of steel. Available in three external profile options, it delivers a refined, minimal appearance that complements modern architectural design across both residential and commercial buildings.
The SL38 accommodates double or triple glazing with a choice of four glass types, and frames can be anodised or finished in a broad range of RAL colours. For homeowners and architects seeking Reynaers aluminium windows that combine strong visual impact with solid energy efficiency, the SL38 is an outstanding option.
Reynaers ML8: High Insulation Window System
The Reynaers Master Line 8 (ML8) is a high-insulation aluminium window system developed for low-energy and Passivhaus buildings. Available in three configurations, the ML8 achieves varying thermal performance levels through the use of advanced internal thermal break materials and seals – all within a consistent, clean external frame profile.
This makes the ML8 an ideal choice for architects and specifiers working to tight energy efficiency targets without wanting to compromise on aesthetics. The result is a Reynaers window that delivers excellent thermal insulation while maintaining the refined proportions expected of architect-grade aluminium windows.
Reynaers CW50: Aluminium Curtain Wall System
The Reynaers CW50 is a highly versatile aluminium curtain wall system offering one of the widest ranges of style variants available in any architectural curtain wall system today. Designed to give architects genuine creative freedom, the CW50 supports a broad set of design options – from traditional grid arrangements to fully bespoke façade configurations.
With strong thermal performance, robust weather resistance, and a high standard of build quality, the CW50 is well suited to both residential and commercial projects. For specifiers requiring a curtain wall solution that holds to the highest standards of performance and design flexibility, the CW50 represents a compelling choice.
Frequently Asked Questions
Find answers to the most common questions we receive about Reynaers aluminium windows. For detailed specifications or project-specific guidance, please get in touch with our team.
Contact UsYes. The SL38 and ML8 both support triple glazing options, improving thermal performance and acoustic insulation. The best glazing specification depends on your project's energy efficiency targets and U-value requirements.
Reynaers aluminium windows are available in a wide range of RAL colours and anodised finishes. This allows complete flexibility for architects and homeowners to match any architectural style or planning condition.
The ML8 High Insulation system is available in configurations designed to meet Passivhaus and low-energy building standards. Our team can advise on the correct configuration and specifications for your project.
The SL38 prioritises ultra-slim sightlines and a steel-look aesthetic, while the ML8 is specifically engineered for maximum thermal performance in low-energy buildings. Both are high-quality Reynaers aluminium windows with different performance and design priorities.
Yes. While the CW50 is widely used in commercial buildings, it is also an excellent choice for high-specification residential projects where large glazed façades, natural light, and architectural expression are priorities.
Our Projects
Stirling, Scotland
Find out more about Stirling, ScotlandHamill House, Scotland
Find out more about Hamill House, ScotlandEdinburgh, Scotland
Find out more about Edinburgh, ScotlandDollar, Scotland
Whether incorporated into a modern contemporary new build or unlocking a period property, our curtain wall can reinvigorate a property by letting the natural daylight come flooding in.
Find out more about Dollar, ScotlandA complete service
from design to installation.
Zyle supplied Passive House windows for our new build, and the system met all project expectations. Airtightness and overall performance were delivered as specified, and their technical coordination on site was reliable and detail focused.
Private Owner
Mark Reynolds, Bristol
Our vacuum glazed sash windows provide an excellent balance between heritage sensitivity and modern performance. The slim glazing preserves the character of the property while significantly improving overall comfort. Installation was precise and professionally managed.
Private owner
Laura Mitchell, Southampton
The Passive House windows performed exactly as required within our project specification. Installation detailing, sealing, and overall execution were handled correctly, ensuring a high standard of delivery. A technically competent and reliable supplier.
Private Owner
Andrew Collins, Cambridge
We selected aluminum windows for their contemporary aesthetic and low maintenance. The proportions are well considered, and the finish quality is consistent throughout. Installation was efficient and carried out with strong attention to detail.
Private Owner
Rachel Adams, Reading
The triple glazed sash windows integrate seamlessly into the existing façade while offering a clear upgrade in comfort. Craftsmanship is evident in both joinery and installation, and the improvement in acoustic insulation is immediately noticeable.
Private Owner
Thomas Green, Nottingham
The Alu-Clad windows and doors introduced a strong architectural presence while maintaining a refined internal finish. Detailing, material quality, and consistency across the project are of a high standard. The process was structured and dependable from start to finish.
Private Owner
Olivia Bennett, Oxford
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Talk to Our Team
Whether you are an architect specifying for a new project, a self-builder planning your custom home, or a developer working to a programme, our team is here to help. Get in touch for technical advice, product information, or to request a quote.
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