Sankyo Tateyama

• ▸Country: Japan
• ▸Headquarters: Toyama Prefecture, Japan
• ▸Key divisions: Sankyo Alumi (construction materials), STEP-G (global extrusion)
• ▸Primary material: Powder-coated aluminium
• ▸Market: Commercial, institutional, and residential, Japan; global through STEP-G
• ▸Climate context: Toyama Prefecture faces heavy snowfall - systems designed for cold-climate performance
• ▸Website: st-grp.co.jp

• ▸Sankyo Alumi residential windows
• ▸Commercial curtain wall
• ▸STEP-G extrusion profiles
• ▸Aluminium entrance systems

Sankyo Tateyama's Toyama base means their systems are engineered with Japan Sea coast conditions in mind - heavy snowfall, significant temperature variation between summer and winter, and the damp coastal air of the Sea of Japan side of Honshu. These conditions leave specific residue patterns on windows. The STEP-G global extrusion network means Sankyo Tateyama profiles appear not just in Japan but in European and Asian construction projects fabricated from STEP-G extrusions. The powder coat specification and profile tolerances follow European standards on STEP-G products.

This is how I clean Sankyo Tateyama windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Sankyo Tateyama systems.

• ✕Do not use abrasive pads on powder-coated aluminium profiles
• ✕Do not pressure wash into frame joints on cold-climate installations - water forced into seals freezes in winter
• ✕Do not leave cleaning solution residue on frames
• ✕Do not use acidic cleaners near glazing unit seals

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