Abstract: The present invention provides an improved synthetic-fiber reinforced window component that provides additional thermal efficient properties without a reduction in strength, provides resistance to temperature conduction and wind deflection of the window component, and is adequate or suitable for screw retention of hardware. The inventive synthetic-fiber reinforced window component includes a sash for retaining window glass, the sash defining at least one hollow, and a solid reinforcement profile nested within the hollow. The profile may comprise first and second side walls and a transverse wall extending between the first and second side walls. The profile may include at least one synthetic, organic fiber strand embedded within the profile proximate the intersection of the first side wall and the transverse wall. The fiber strands may extend in the longitudinal direction of the profile.