The CS 77 is the core aluminium window system in Zakuna’s range, engineered around a multi-chamber thermally broken aluminium profile with fibreglass-reinforced polyamide thermal break strips and precision-engineered weather gaskets.
Three profile design options are available: Functional, for a clean contemporary aesthetic with standard visible sightlines; Hidden Vent, where the opening sash is concealed within the frame, creating a seamless appearance from the exterior that reads as a fixed light; and Renaissance, a wider-sightline profile suited to traditional and heritage properties where a more characterful window section is appropriate. All three deliver consistently high levels of thermal insulation, air tightness and weather resistance, and are available with double or triple glazed units.
The CS 77 is available in side-hung, top-hung, tilt-and-turn and fixed configurations across all standard and bespoke sizes.
A comprehensive RAL colour range including textured, anodised and dual colour options allows the CS 77 to be specified for any architectural palette. All CS 77 windows are Secured by Design accredited, and smart access hardware options are available on selected configurations. The profile co-ordinates directly with the CS 77 aluminium external door system and the CF 77 Bi-fold for a consistent architectural language across the full building envelope. Visit our Window Showcases to see the CS 77 in completed residential and commercial projects across the Home Counties and London.
