TOSTEM Aluminium Systems: Japanese Pre-Engineered Perfection
The global benchmark for ultra-slim profiles, factory-controlled precision, century-long engineering heritage, and ultimate weather resistance.
A Century of Architectural Brilliance
"Over 100 years of LIXIL global innovation, bringing millimetric accuracy directly from automated factory beds to Saudi Arabia's finest estates."
Sourced through the global network of LIXIL Japan, TOSTEM stands at the pinnacle of architectural innovation with a legacy spanning over a century. For more than 100 years, TOSTEM has continually redefined how the world interacts with aluminium opening systems, earning the absolute trust of leading international architects, master developers, and luxury estate owners.
Unlike standard systems that are cut, modified, and manually pieced together by local workshops, TOSTEM profiles are 100% Pre-Engineered. Every window and door is designed, extruded, machined, and quality-tested in an automated factory environment to exact millimetric dimensions before arriving at your site. This eliminates human assembly error, guarantees structural uniformity, and ensures the systems perform precisely as engineered for decades.
Certified Supply & Turnkey Installation Across the Kingdom
Prestige Creations is the certified dealer and authorized systems partner for TOSTEM within the Kingdom of Saudi Arabia. We bridge the gap between Japanese factory pre-engineering and localized site execution, offering a completely integrated, single-source solution for elite developments.
The Architectural Hierarchy
From flagship ultra-luxury profiles to high-value architectural engineering collections. Select a series to view specifications:
GRANTS
(GRANTS / GRANTS PLUS)
TOSTEM’s absolute topmost profile series, engineered for architectural masterpieces and high-end luxury villas. It redefines the boundaries of living spaces with an innovative hidden-sash design and ultra-slim meeting stiles. This tier maximizes glass surface areas to deliver sweeping, unobstructed panoramic views while maintaining the highest structural and wind-load stability available.
ATIS SERIES
(ATIS / ATIS PLUS)
The perfect sweet spot between high-end aesthetics and everyday practicality. Awarded prestigious global accolades (including the Red Dot and iF Design Awards), ATIS is built around a minimalist design where all functional components, hinges, and hardware are fully concealed within smooth, slim frames. It features TOSTEM's proprietary Invisible Insect Screen for 20% better ventilation.
WE SERIES
(WE 70 / WE PLUS)
TOSTEM's highly accessible entry tier, designed to bring legendary Japanese factory precision to mass-market residential compounds, commercial mid-rises, and budget-conscious developments. Despite its competitive pricing, the WE series never compromises on core performance, offering robust functionality, smooth rolling operations, and tested weather protection.
AIRFLOW SYSTEMS
A specialized boutique ventilation system designed to introduce constant, fresh air circulation throughout a luxury home without compromising security. It utilizes unique vertical sliding glass panels built seamlessly inside the main doors that operate while the frame remains securely locked.
GIESTA
High-end structural main entrance doors that perfectly wrap an insulated structural steel core in sophisticated wood-pattern or sleek metallic finishes. Equipped with user-friendly heavy-duty handles, multi-point locking systems, and advanced thermal seals to block exterior desert heat at the property's main entry point.
The Four Pillars of Testing
TOSTEM systems undergo rigorous physical laboratory testing inside state-of-the-art testing centres in Japan and Thailand. They pass the highest global testing parameters:
Wind Pressure Resistance
Proven to safely withstand extreme positive and negative wind loads. These profiles will not rattle, vibrate, or bend under intense desert sandstorms or high-altitude pressures.
Water Tightness
Engineered with steeply sloped tracks and patented One-Way Non-Returnable Drainage Valves. Allows water to escape instantly without blowing back inside under storm pressures.
Air Tightness
Minimizes uncontrolled air infiltration down to a tight envelope. Blocks hot desert dust, fine sand particles, and moisture to drastically lower HVAC energy loads.
Acoustic Insulation
Reduces external ambient noise by up to 25 Decibels using standard single glass, creating a serene environment. Scales even higher with double-glazed or laminated glass.
Proprietary Innovations
Exclusive to TOSTEM
Developed inside proprietary laboratories, these design benefits set pre-engineered TOSTEM frames apart from typical custom-built local systems.
TEXGUARD Surface & Colour Protection
TOSTEM’s patented anodizing coating process. An electronic clear-coat layer protects the aluminium profiles from scorching desert heat, harsh UV radiation, and high coastal humidity. It prevents colour fading and scratching, maintaining its rich colour gloss and surface lustre for up to 40 years.
Zero Bottom-Frame Screws (No Wall Seepage)
Traditional installations require drilling screws straight through the bottom frame, creating hidden entry pathways for water to seep into walls. TOSTEM utilizes a proprietary Snap-Fit Levelling Plate System on the window sill. The window frame snaps perfectly into place, completely eliminating bottom frame punctures.
High-Endurance EPDM Nano-Gaskets
Standard windows rely on cheap brush piles that degrade over time. TOSTEM utilizes long-lasting, factory-moulded EPDM Nano-Gaskets at every corner intersection, ensuring airtight and watertight seals that never decay.
Architectural Download Desk
Provide your design teams, consultants, and contractors with official certified documentation straight from TOSTEM’s international engineering desk.
Request a Technical System Submittal
Ready to specify TOSTEM for your project? Submit your architectural drawings directly to our engineering desk in Jeddah for customized wind-load calculations, profile sizing, and configuration recommendations.