• Brand: Tostem
• Establishment: 1923
• Product Area: Residential and construction building materials including aluminum sash windows, entrance doors, residential building products, curtain walls, or the like.

"Tostem" is a general building materials brand that handles products from aluminum sash windows and entrance doors to interior building materials and construction materials.

In 1992, the brand name was changed to its current form of "Tostem" and provides building materials that are indispensable to residential living.

Product development is always conducted from the point of view of the customer and places the utmost priority on ensuring product quality and our factories. Detailed verification is performed in the design and testing stages, and coupled with concentration on confirming basic performance characteristics, testing is performed under rigorous conditions for durability or weathering characteristics, and only those products that have satisfied our high standards proceed to the product stage.