Engineered to a Japanese standard.
Japanese Technology
Every design draws on TOSTEM's Japanese manufacturing standards, refined over decades for precision, fit, and finish.
About Selective SystemsQuality Assurance & Testing
Every batch is tested against ASTM, JIS, and AAMA benchmarks for wind, water, and structural performance before it reaches your site.
How we test TOSTEM windowsSurface & Colour Perfection
TEXGUARD coating locks in colour and lustre for up to 40 years, resisting scratches, fading, and corrosion.
Why choose Selective SystemsOn-Time Delivery
Pre-engineered, factory-assembled components arrive window-in-a-box, ready for fast, precise on-site installation.
How we deliver on timeFlexible Pricing
Multiple series and specifications let you match performance to your budget, without compromising on quality.
Get a quote for your budgetCommon questions, answered.
What sets the Grants series apart from Selective Systems' other series?
Grants is built around maximising glass area — a slimmer frame design lets in more light and a wider view than a standard-frame window of the same size, without giving up structural strength.
Which products are available in the Grants series?
Sliding, casement, awning, fixed, and glass-to-glass corner windows, alongside sliding, casement, French, and corner-slider doors — all engineered on the same Grants profile.
Is Grants suited to residential and commercial projects alike?
Yes — the same pre-engineered, factory-made construction performs consistently whether it's fitted into a home, an office, or a larger façade.


