What are uPVC Flush Sash Windows and how do they differ from standard casement windows?

Our uPVC flush sash windows are designed to replicate the appearance of traditional timber windows. Unlike standard casement windows where the opening sash sits proud of the frame, flush sash windows sit perfectly in line with the outer frame when closed, creating a smooth, flat surface. This gives them a sleek, classic look, ideal for period properties or modern homes seeking a heritage feel.