Casement window

A casement window (or casement) is a window that is attached to its frame by one or more hinges. Casement windows typically are hinged at the side, sometimes at the top or bottom. They are used singly or in pairs within a common frame, in which case they are hinged on the outside.

Casement windows were the most common house window before the sash window was introduced, and usually contain leaded glass. These casement windows usually were hinged on the side, and opened inward. The windows were covered by functional exterior shutters, which opened outward.

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