Sash or casement? Here's an honest comparison of the two styles.
A sash window slides vertically within its frame. A casement hinges outward from the side, like a door. The casement's hinging action lets it seal tightly with multi-point locking; the sash's sliding action makes that harder.
Casements seal better and ventilate more fully, which is why they dominate modern building. Sash windows persist mainly for their period character — a real reason, just not a performance one.
Casements seal tighter and ventilate more fully thanks to their hinging action and multi-point locking. Sash windows persist mainly for period character rather than performance.
Casement — it opens fully to the outside air. A sash only opens to about half its area at once.
Casement — the hinging action lets multi-point locking pull it tight against gaskets all round.
Related guides covering this topic from other angles — different products, applications, or contexts.
Tell us your openings and we'll measure on site, advise, and give you a real quote — factory-direct from our Pannimadai works in Coimbatore.