TOSTEM introduces an exquisite collection of new-age Aluminium Slit Windows for the contemporary homeowner. Engineered using Japanese innovation technology, our slit windows are available in horizontal and vertical design orientations. Installing our JIS and ASTM-certified slit aluminium windows means accentuating the visual appeal of your homes and bringing your aesthetic vision to life.
Redefining quality benchmarks in the housing industry, TOSTEM Aluminum Slit Windows are designed to transform your home into modern spaces of elegance and irresistible luxury.




Manufactured using Japanese innovation, our windows can excel in extreme weather conditions and temperature variations.

Be it one window or 100: our machine-driven manufacturing ensures quality assurance across all our products.

Our unique windows come home-delivered in a box, making transportation, handling, and storage efficiency a guarantee with us.
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We comply with globally-recognized ASTM (American standards for testing and materials) and JIS (Japanese industrial standards) quality assurance standards to ensure industry-tested quality across all our aluminium slit windows.
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TOSTEM is a highly celebrated Japanese brand for global housing and building materials. Installing our slit windows means introducing the perfection of international manufacturing standards into your homes.
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The anodized coating of our aluminium slit windows is further strengthened using the patented TEXGUARD coating. The result: long-lasting lustre, gloss retention, and surface protection from heat, sunlight, and water.
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Home delivering our products at the agreed turnaround time is an indispensable hallmark of our commitment to our clients. Hassle-free purchase and on-time delivery are guaranteed when you purchase our glass slit windows.
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Manufacturing aluminium slit windows priced at a budget that our clients can afford is a constant endeavour at TOSTEM INDIA. By consciously pricing our vertical slit windows for ventilation, we have become a leading luxury window manufacturer for all.
When shopping for a window, the cost can vary based on several factors such as:
Consider the following factors when choosing a modern slit window:
TOSTEM products are tested and certified by all major Global Standards, which ensure superior quality and consistent performance.

ASTM - American Society for Testing and Materials

American Architectural Manufacturers Association (AAMA)

Japanese Industrial Standards (JIS)

SGS System Certification ISO 9001

Thai Industrial Standards Institutes (TISI)