Embodiments can provide an impact-resistant fenestration comprising an offset dual-pane insulated glass unit, comprising a small pane; a large pane, wherein the large pane has a greater surface area than the small pane; a layer of impact-resistant film attached to either the large pane or the small pane; wherein the small pane and the large pane are secured together using an insulated glass spacer to create an airspace between the small pane and large pane; and wherein the small pane is centrally secured on the large pane to create an overhang section; a tiered frame comprising an overhang mount and a tiered mount; and a glass stop; wherein the offset dual-pane insulated glass unit is mounted into the tiered frame such that the overhang section of the offset dual-pane insulated glass unit is secured to the overhang mount of the tiered frame using a layer of overhang adhesive, the small pane of the offset dual-pane insulated glass unit is secured to the standard mount of the tiered frame using a layer of standard adhesive, and the glass stop attaches to the overhang section and the tiered frame.