draaikiep

Draaikiep is the Dutch term for the window style commonly known in English as a tilt-and-turn window. It uses a single sash that can be opened in two distinct ways: it can be tilted inward from the top for secure, draft-free ventilation, or swung inward on side hinges for full opening and easy cleaning.

Operation and hardware: The window is controlled by a handle that can be rotated to three positions: closed, tilt, and turn. A multi-point locking system secures the sash in each mode, and the hinges are designed to bear the weight of the sash when it is swung in. The tilt position creates a small opening at the top while maintaining security; the turn position provides a wide inward opening.

Materials and glazing: Draaikiep windows are installed in wood, uPVC, or aluminum frames and are typically double-glazed, with triple glazing used in energy-efficient installations. Hardware is designed to support frequent operation and to allow easy cleaning from the inside when the sash is in the turn position.

Usage and advantages: They are widely used across the Netherlands and in other parts of Europe, especially in apartments and modern houses. Benefits include flexible ventilation, security when tilted, ease of cleaning from inside, and space-saving operation since the sash opens inward rather than outward. Drawbacks include higher price, more complex maintenance, and potential air leakage if not properly sealed.

See also: Tilt-and-turn window.