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What is a Casement Window?

By J. Beam
Updated May 16, 2024
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A casement window is a window that is hinged and opens and closes like a book, by swinging either in or out. It consists of a frame, hinges, and a handle or crank that operates the opening and closing mechanism. There are several styles of these windows.

A typical casement window is vertically hung, hinged on either the left or right side and opens out. A French casement window has two separate panes of glass, hinged on both sides, and opens unobstructed in the center. An awning style window is hinged on the top and opens out from bottom up. These types of windows were popular prior to the sash window. They can be found on older style Prairie and Tudor homes.

Though the casement window is not as popular as it once was, replacement windows are still being manufactured. A new replacement one typically has a crank-style handle, but some have lever style handles that also act as locking mechanisms. Like other styles of windows, it can be installed as a single unit, or grouped together. This type of window is ideal to place above cabinets, countertops, or places that are slightly more difficult to reach because the handle mechanisms are easy to operate.

Though a casement window may swing in or out, many people avoid the "swinging in" style in spaces that are small because the open window can be an obstruction. Similarly, an inward swinging one can interfere with window coverings such as mini-blinds, sheers, or draperies. However, the fact that the window swings open makes it easy to clean. Older styles usually featured leaded lights, but modern versions typically feature solid pane glass or molded inserts for decoration.

For homeowners who prefer this type of window, new replacement styles are readily available in a wide selection and are considered to be both affordable and energy efficient.

HomeQuestionsAnswered is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By anon117199 — On Oct 09, 2010

Yes, they have locks.

By anon16389 — On Aug 04, 2008

do casement windows have locks?

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