Concept Folding® 77, the accordion door system, combines high insulation and comfort with maximum transparency and aesthetics. Such door opens your house to the surrounding nature and minimally uses the space. There are various ways of opening, both inward and outward. A working flap is provided in the CF 77, which is used as an entrance door when the rest of the structure is locked.

CF 77 is offered with three options of thresholds: high for the improved isolation, low for the best passability and rising. The door of the CF 77 is compatible with all window and door CS systems and facades.

The external visible profile CF 77 exists in two style variants: Functional and Slim-Line (CF 77-SL). The latter has a more subtle and aesthetic profile.