A hinge assembly for a roof window, the hinge assembly having a frame mountable portion (3, 41) and a sash mountable portion which are in slidable engagement with each other, the hinge assembly further comprising a braking means (2, 22, 51), the braking means comprising a leaf spring (2, 22, 51) for applying a braking force between the sash mountable portion and the frame mountable portion (3, 41) of the hinge assembly during at least a portion of the slidable movement therebetween, wherein at least one means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is operably engageable with the braking means (2, 22, 51), wherein the braking means (2, 22, 51) is locatable on the frame mountable portion (3, 41), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is a means for adjustably stiffening at least a portion of the braking means (2, 22, 51), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) has braking means (2, 22, 51) engagement means (9, 56) for engagement with at least a portion of the braking means (2, 22, 51), and wherein the leaf spring (2, 22, 51) is mounted between or integrally formed with two spring mounting means (52, 53) of the hinge assembly at first and second ends of the leaf spring (2, 22, 51), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) comprises user operating means (12, 58) for allowing user interaction with the means for adjustably controlling the braking force applied by the braking means (2, 22, 51), wherein the user operating means (12, 58) for allowing user interaction with the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is a screwdriver receiving head, a head for receiving an Allen key, or a head having any features compatible with any suitable user actuation means characterized in that the braking means (2, 51) engagement means (9, 56) comprises a cantilever beam or in that the means for adjustably controlling the braking force applied by the braking means is a compressible tensioning apparatus, the compressible tensioning apparatus comprising a compressible tensioning means which is compressible such that it expands in at least one dimension towards and into contact with the braking means, or in that the means for adjustably controlling the braking force applied by the braking means is a cam. wherein at least one means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is operably engageable with the braking means (2, 22, 51), wherein the braking means (2, 22, 51) is locatable on the frame mountable portion (3, 41), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is a means for adjustably stiffening at least a portion of the braking means (2, 22, 51), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) has braking means (2, 22, 51) engagement means (9, 56) for engagement with at least a portion of the braking means (2, 22, 51), and wherein the leaf spring (2, 22, 51) is mounted between or integrally formed with two spring mounting means (52, 53) of the hinge assembly at first and second ends of the leaf spring (2, 22, 51), wherein the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) comprises user operating means (12, 58) for allowing user interaction with the means for adjustably controlling the braking force applied by the braking means (2, 22, 51), wherein the user operating means (12, 58) for allowing user interaction with the means for adjustably controlling the braking force applied by the braking means (2, 22, 51) is a screwdriver receiving head, a head for receiving an Allen key, or a head having any features compatible with any suitable user actuation means characterized in that the braking means (2, 51) engagement means (9, 56) comprises a cantilever beam or in that the means for adjustably controlling the braking force applied by the braking means is a compressible tensioning apparatus, the compressible tensioning apparatus comprising a compressible tensioning means which is compressible such that it expands in at least one dimension towards and into contact with the braking means, or in that the means for adjustably controlling the braking force applied by the braking means is a cam.