Aluminium Vertical Sliding Windows
Dual sashes slide vertically for ventilation without swinging into interior or exterior space.
Engineered to a Japanese standard.
Japanese Technology
Every design draws on TOSTEM's Japanese manufacturing standards, refined over decades for precision, fit, and finish.
Learn MoreQuality Assurance & Testing
Every batch is tested against ASTM, JIS, and AAMA benchmarks for wind, water, and structural performance before it reaches your site.
Learn MoreSurface & Colour Perfection
TEXGUARD coating locks in colour and lustre for up to 40 years, resisting scratches, fading, and corrosion.
Learn MoreOn-Time Delivery
Pre-engineered, factory-assembled components arrive window-in-a-box, ready for fast, precise on-site installation.
Learn MoreFlexible Pricing
Multiple series and specifications let you match performance to your budget, without compromising on quality.
Learn MoreCommon questions, answered.
How is a vertical sliding window different from a tilt & slide window?
Vertical sliding windows move both sashes up and down independently along the same plane, without any inward tilt — it's a good fit where floor or ceiling clearance for a swinging sash isn't available.
How long does installation take?
Units are pre-engineered and delivered largely assembled, so professional installation typically takes three to four hours per opening.
Are vertical sliding windows a good option for tight spaces?
Yes — because neither sash swings into the room or outward, they're well suited to balconies, walkways, and any space where clearance is limited.