Our Keops Interlock premium tilt & turn windows are versatile, smart yet simple. They offer a two way function; with the tilt function each sash is hinged at the bottom and tilted inwards from the top. The tilt restricter gives secure ventilation for peace of mind. The turn function creates an inward opening side hung operation. They can be fully opened from the side allowing maximum fresh air, easy cleaning and maintenance. The wooden windows have a multi-point closing mechanism and are 24mm double glazed as standard with a U value of 1.8.