The Başak 74T is the flagship wide-span window system in the Başak thermal series, with a 34 mm polyamide thermal break delivering Uf = 2.33 W/m2K (the lowest in the range). Supporting glass units from 24 to 50 mm, it accommodates high-performance triple glazing for passive-standard or low-energy building envelopes. Wall thickness of 1.8–2 mm combined with a corner cleat joint option ensures structural performance at large sash dimensions.

Frame width: 74 mm. Sash width: 82 mm. Wall thickness: 1.8–2 mm. Thermal break: 34 mm polyamide. Uf = 2.33 W/m2K. Glass range: 24–50 mm. Gaskets: EPDM. Corner joint: corner cleat. Drainage: integrated. Accessory channel: Euro-standard.

Euro-standard accessory channels. 34 mm polyamide thermal break. EPDM gaskets. Corner cleat joint. Integrated drainage. SKU 3867.