A casement window is a window that is attached to its frame by one or more hinges at the side. They are used singly or in pairs within a common frame, in which case they are hinged on the outside. Casement windows are often held open using a casement stay.

Casement windows provide a broad viewing area that lets plenty of natural sunlight into your residence. They also allow for optimal ventilation, as you can open them much wider than most other window styles. What’s more, the design of casement windows is among the most energy efficient you can find because the sashes press against the frame when closed, creating a virtually airtight seal that minimizes air infiltration.