Abstract: A pivot hinge for roof windows with a sash pivoting around the axis located between the upper and the lower member of a window, has a balancing system, which ensures the state of equilibrium of a window sash when its centre of gravity is located outside the sash rotating axis and the friction spring of the hinge is unable to hold the sash pivoted in each its position. At the same time the window fittings, its assembly, installation in a roof and its appearance remain unchanged. Also the method of separating of both hinge parts (taking a sash out of a window frame) remains unchanged.

Abstract: A pivot hinge for roof windows with a sash pivoting around the axis located between the upper and the lower member of a window, has a balancing system, which ensures the state of equilibrium of a window sash when its centre of gravity is located outside the sash rotating axis and the friction spring of the hinge is unable to hold the sash pivoted in each its position. At the same time the window fittings, its assembly, installation in a roof and its appearance remain unchanged. Also the method of separating of both hinge parts (taking a sash out of a window frame) remains unchanged.

Abstract: The subject of the invention is a roof window frame with two opposite parts (1) determining the window height, having in their outer side wall on their full length a rectangular recess (2) with a supporting surface (2a) facing the roof, and having through fixing holes (3) between the frame surface above the glazing plane and the parallel supporting surface (2a) of the recess (2). The method of embedding and fixing the window frame in the roof following the invention includes inserting the window frame in an opening of matching size in the roof surface so that the supporting surface (2a) of the recess (2) in the side parts (1) rests on the rafter framing elements of the roof, and then screwing it down to these elements with screws inserted in the through holes (3) in the side parts (1).