SK (HKS)- tilt and slide doors are a proven solution recognized by many customers especially those involved in the construction of modern family houses. Door construction allows for the implementation of a 2m wide passage in single-sided system; in the double-sided system passage width is increased to 4m with a possibility of 8m glazing. Standard threshold with a minimum height of 65mm guarantees reliability and high integrity especially in places where doors are exposed to strong wind with heavy rainfall. The sliding wing has a tilt function, which means ventilation is facilitated whilst the wing is blocked to restrict its free movement.