casement windows Casement windows are attached to their window frame by hinges. Rather than sliding up and down, as in the case of single or double-hung windows, these windows swing out when open. There are multiple variations on the casement window, including single-frame, French, push-out, and egress..xs vietlott Learn about casement windows, a popular and versatile window type that opens outward for fresh air and views. Explore Andersen's casement window options, design tips, FAQs and real-world examples.78win.com Casement windows are old-school windows with unique mechanics, style, and design. They are easy to clean and maintain, as they can effortlessly open outwards or inwards.