Wonder Windows offers a full selection of replacement windows in Rochester and Buffalo, NY including 2- and 3-Lite Sliding windows, Awning windows, Casement windows, Double-hung windows, Picture windows, Hopper windows, Triple Casement windows, Twin Double-hung windows, Triple Double-hung windows, Bow and Bay windows. We’re also one of the area's leading providers of OKNOPLAST® windows from Europe, the world’s leader in tilt turn windows.