A hardware system in a fold-up window assembly, comprising: a frame; an upper sash; a lower sash comprising an upper rail, the upper rail comprising a groove; a balance assembly configured to assist in moving the lower sash at least to move the window assembly to the open configuration; a slide locking assembly recessed in the upper rail of the lower sash and moveable to couple the lower sash to the frame of the window assembly; a first hinge assembly hingedly interconnecting an upper portion of the lower sash and a lower portion of the upper sash; and a second hinge assembly hingedly interconnecting an upper portion of the upper sash and a header of the frame; wherein the upper sash and the lower sash are configured to fold-up to an open configuration and unfold to a closed configuration; wherein the slide locking assembly includes a track member fixed to and recessed within the groove formed in upper rail of the lower sash, a locking bar moveable relative to the track member, a rack member fixed to the locking bar, a handle, an axle extending from the handle through a bore formed in the upper rail and towards the groove, a gear engaged by the axle and engaging the rack member; wherein placement of the track member within the groove allows the lower sash to lie flush against the upper sash to allow the upper sash and the lower sash to assist in providing an appropriate seal in the closed position, wherein the first hinge assembly comprises a leaf that is recessed into a pocket 36(a) of the upper rail and wherein the track member and locking bar are disposed over the leaf of the first hinge assembly; and wherein at least the first hinge assembly and the second hinge assembly cooperate with the upper sash and the lower sash to allow the upper sash and the lower sash to fold relative to the frame such that the upper sash rotates around a second hinge pin of the second hinge assembly near the header of the frame and the lower sash rotates around a first hinge pin of the first hinge assembly as the upper sash and lower sash fold and unfold between the closed configuration and the open configuration. a frame; an upper sash; a lower sash comprising an upper rail, the upper rail comprising a groove; a balance assembly configured to assist in moving the lower sash at least to move the window assembly to the open configuration; a slide locking assembly recessed in the upper rail of the lower sash and moveable to couple the lower sash to the frame of the window assembly; a first hinge assembly hingedly interconnecting an upper portion of the lower sash and a lower portion of the upper sash; and a second hinge assembly hingedly interconnecting an upper portion of the upper sash and a header of the frame; wherein the upper sash and the lower sash are configured to fold-up to an open configuration and unfold to a closed configuration; wherein the slide locking assembly includes a track member fixed to and recessed within the groove formed in upper rail of the lower sash, a locking bar moveable relative to the track member, a rack member fixed to the locking bar, a handle, an axle extending from the handle through a bore formed in the upper rail and towards the groove, a gear engaged by the axle and engaging the rack member; wherein placement of the track member within the groove allows the lower sash to lie flush against the upper sash to allow the upper sash and the lower sash to assist in providing an appropriate seal in the closed position, wherein the first hinge assembly comprises a leaf that is recessed into a pocket 36(a) of the upper rail and wherein the track member and locking bar are disposed over the leaf of the first hinge assembly; and wherein at least the first hinge assembly and the second hinge assembly cooperate with the upper sash and the lower sash to allow the upper sash and the lower sash to fold relative to the frame such that the upper sash rotates around a second hinge pin of the second hinge assembly near the header of the frame and the lower sash rotates around a first hinge pin of the first hinge assembly as the upper sash and lower sash fold and unfold between the closed configuration and the open configuration.