WINDOWS AND DOORS
Luxury Aluminium Systems for Modern Living
SiON Windows & Doors represent the perfect balance between design, performance, and durability. Crafted from high-end aluminium, our systems are engineered for those who value both aesthetics and functionality in their residential or commercial projects.
Aesthetics
Our profiles are sleek, refined, and modern. With advanced frame technology, every detail has been designed to create clean lines and a visually pleasing finish, elevating the architectural character of any space.
Performance
SiON systems excel as complete glazing solutions. From superior insulation that ensures year-round comfort, to enhanced energy efficiency and sound reduction, they deliver uncompromised performance for contemporary living and working environments.
Security & Durability
Built to last, our aluminium systems provide exceptional structural integrity and advanced security features. Designed to withstand both time and use, they ensure peace of mind while maintaining a sophisticated look.
Flexibility in Design
SiON systems allow for expansive glass panels and large-scale openings, enabling light-filled interiors and seamless connections to outdoor spaces. With a wide range of design options, our solutions adapt beautifully to unique project requirements.
Why Choose SiON
Because simplicity, luxury, and technical performance should never be at odds. SiON Windows & Doors marry timeless design with cutting-edge engineering — delivering an architectural solution without compromise.
Fold-Stacking
Fold-Stacking
Elegance and Practicality
Fold-stacking doors bring a sense of openness and flexibility to any space. Designed with slim aluminium frames and expansive glass panels, they create uninterrupted views while maximising natural light. Their folding mechanism allows entire walls to open up, seamlessly connecting interiors with outdoor spaces. The ultimate combination of elegance and practical functionality.
Smooth and Easy
Engineered with precision hardware and advanced track systems, SiON fold-stacking doors glide effortlessly with minimal effort. The smooth operation makes daily use a pleasure, whether you’re opening a single panel for easy access or folding the entire system away to create a wide, flowing space.
Durable and Customisable
Crafted from high-quality aluminium, these systems are built to withstand time, weather, and heavy use, while maintaining their clean and modern aesthetic. With a variety of finishes, configurations, and sizes available, each fold-stacking door can be customised to suit your project’s style and functional needs, ensuring a perfect fit for both residential and commercial applications.
Sliders
Views and Openness
Slim aluminium profiles and large glass panels maximise natural light and create uninterrupted views, opening up interiors with a sense of spaciousness.
Smooth and Easy
Engineered with precision rollers and tracks, SiON sliding doors operate effortlessly for everyday comfort and convenience.
Secure and Customisable
Durable aluminium construction paired with advanced locking systems ensures both strength and safety. A range of sizes, finishes, and configurations allows for complete design flexibility.
Flush Floor Integration
Seamless thresholds allow for smooth transitions between indoor and outdoor spaces, enhancing accessibility while maintaining a sleek, modern aesthetic.
Tilt-Turn
European Multi-functionality
Inspired by European design, tilt-turn windows combine three functions in one system: fixed glazing, secure tilt ventilation, and full inward opening on a side hinge. This multi-functional approach makes them ideal for modern living, balancing convenience, efficiency, and style.
Modern Aesthetics
With slim aluminium frames and clean architectural lines, SiON tilt-turn windows bring a refined, contemporary look to any project, from high-end residences to sophisticated commercial spaces.
Secure and Efficient
Engineered with precision hardware, the system ensures smooth operation and reliable locking. Excellent insulation performance further enhances comfort, energy efficiency, and peace of mind.
Sophisticated and Versatile
Beyond their functionality, tilt-turn windows offer exceptional flexibility in design. Available in a wide range of sizes, and configurations, they can be tailored to suit diverse architectural styles, combining sophistication with everyday practicality.
DRIFT
Unique to the South African context, SiON Tilt and Drift Windows offer a smart, practical solution for modern buildings. Their innovative design allows the sash to tilt open at the top for secure ventilation, or slide horizontally (drift) for full opening and easy access.
This versatility makes them ideal for a wide range of applications, from homes needing controlled airflow to commercial spaces that demand flexibility and convenience.
Combining European-inspired engineering with local practicality, SiON Tilt and Drift Windows deliver durability, smooth operation, and everyday comfort — perfectly suited to South African conditions.
Tilt and Drift: the best of both sliding and tilt-turn systems, flexibility and performance in one intelligent design.
Tilt - Drift
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TILT
Combinations
The SiON Advanced Glazing System is more than just a set of aluminium windows and doors — it’s a modular, adaptable system designed to give architects, builders, and clients complete freedom of choice. By combining elements such as tilt-turn windows with sliding or fold-stacking door systems, the range allows for endless variations and unique solutions.
Flexibility in Design
Our system is engineered to integrate seamlessly, meaning tilt-turn elements can be incorporated into larger sliding or folding applications. This opens up creative possibilities whether it’s maximising light and views, improving ventilation, or creating striking architectural features.
Possibilities Without Limits
Because the system is built on a versatile framework, almost any combination is possible. Large expanses of glazing, bespoke configurations, or tailored details can be achieved without compromising on performance, security, or aesthetics.
Collaborative Solutions
At SiON, we don’t just supply products — we work with you to explore the best options for your project. By engaging with us early in the process, we can help uncover creative solutions that balance functionality, design intent, and budget. Together, we turn architectural possibilities into practical realities.
TILT-SLIDE
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SLIDE
TURN-DRIFT-FIXED
TILT
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Frames and Glass
At SiON, we believe that the glass is as important as the frame. That’s why we supply only top-quality, performance glazing — without compromise.
Our double-glazed systems provide exceptional thermal insulation, keeping interiors cooler in summer and warmer in winter, while also delivering acoustic insulation for a quieter, more comfortable living environment. This combination of energy efficiency and sound reduction ensures not just performance, but also meaningful living comfort and long-term energy savings
SiON frames are crafted from premium aluminium, engineered to be durable, weather-resistant, and long-lasting. Finished with high-quality powder coating, they embody a sense of luxury while retaining their refined appearance over time.
Beyond aesthetics, our frames are technologically advanced. With thermal break technology, they significantly reduce heat transfer, ensuring better insulation and improved energy efficiency. The result is a frame system that is not only superior in strength and security, but also contributes to year-round comfort inside the home.
Adaptable Glazing, Expertly Specified
Every project is unique and so are its glazing requirements. The SiON Advanced Glazing System is fully adaptable to suit any application, from residential homes to high-performance commercial buildings.
With our expert guidance, we help you select and specify the best-performing glass for your needs, balancing factors such as glass thickness, spacer configuration, and Low-E coatings to achieve optimal insulation, clarity, and comfort.
Whether your priority is energy efficiency, solar control, or acoustic performance, SiON ensures your glazing system is precisely tailored to the demands of your space, delivering superior results without compromise.
Thermal Break Technology
Thermally broken aluminium frames are a key element of high-performance glazing systems. By separating the inner and outer aluminium profiles with an insulating barrier, heat transfer is dramatically reduced, keeping interiors warmer in winter and cooler in summer. This technology not only improves energy efficiency but also enhances comfort and condensation control, making it an essential feature in modern architectural design.
Glazing System | Specification | Light Transmittance % | Light Reflectance % | Energy Transmittance % | Energy Reflectance % | SHGC | U Value (W/m2*K) | Accoustics Rw (db) |
|---|---|---|---|---|---|---|---|---|
SiON PERFORMANCE GLASS | 6 grey tint-12-6, Argon, Low E | 57 | 11 | 37 | 31 | 0.45 | 1.5 | 33 |
STANDARD CLEAR | 6-12-6, Argon, Low E | 77 | 15 | 49 | 32 | 0.57 | 1.5 | 33 |
LIGHT BLOCK GLASS | Reflect film-6 blue tint-12-6, Argon, Low E | 17 | 54 | 11 | 41 | 0.15 | 1.5 | 33 |
HIGH PERFORMANCE GLASS | 6 blue tint-12-6, Argon, Low E | 48 | 9 | 27 | 10 | 0.34 | 1.5 | 33 |
Glazing Performance
SION provides high-performance glass for every glazing application, combining advanced coatings and specifications to deliver exceptional comfort and efficiency. Our range includes Low-E, solar control, and high clarity options, optimised for thermal insulation, light transmission, and solar heat gain control (SHGC). Each system is engineered to meet the highest standards of performance and aesthetics for contemporary architecture.
Why It Matters
A building’s insulation can make or break its overall livability and contributes significantly to internal comfort, energy efficiency, and long-term value.
Southern African homes are frequently poorly insulated, and it is widely assumed that the majority of heat transfer occurs through the roof.
However, as the sun bakes on a house, the windows and doors absorb one-quarter of its heat gain.
This means that even if your roof and walls are well insulated, but your glazing elements are neglected, your home will heat up in the summer and lose heat in the winter, primarily through the windows and doors.
This tremendous heat gain and loss causes our houses to feel cold in the winter and warm in the summer.
A well-insulated home retains heat in the winter and stays cool in the summer.
Single-glazing is not an effective insulator, resulting in heat loss in the winter and heat gain in the summer.
Single-glazed windows are our homes' weak point, and it is often overestimated how much of a difference having a well-insulated home makes.
Well-insulated homes are 40-50% more energy efficient, saving money on heating and cooling over time.
Double glazing with thermally broken aluminium frames forms an insulation barrier, preventing heat flow into and out of the home.
Double glazing not only insulates your home from heat, but it also acts as a sound barrier, which improves home comfort, particularly in cities.
SiON's double-glazed systems are elegant and are the pinnacle of the modern insulated home.