Aluminium Casement Windows
Side-hung sashes that swing to a full opening, built for maximum ventilation and light.
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 casement window different from a sliding window?
Casement sashes are side-hinged and swing fully open on a crank or handle, giving maximum ventilation and an unobstructed view — sliding windows instead run along a track.
Are casement windows suited to India's climate?
Yes — the aluminium frame and rubber gasket seals hold up through monsoon humidity, summer heat, and dusty conditions with minimal maintenance.
Can casement windows be fitted with insulated or double glazing?
Yes, for extra sound and thermal insulation on busier or hotter sites — we'll size the glazing package to the opening during quoting.
How do I keep a casement window looking new?
A wipe with a damp cloth every couple of weeks is enough — the TEXGUARD coating resists dust build-up and keeps the finish from fading.