Window Terminology

II. Window Styles

Casement


An operating window that swings out sideways (like a door). Usually taller than it is wide.

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Awning


An operating window similar to a casement window, except that it pushes outward at the bottom.

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Picture


A window that does not open and has no sash. The glass is mounted directly into the frame.

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Fixed


A window that consists of a fixed sash mounted into a frame. It looks similar to a closed casement or awning window.

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Single Hung


A window with two separate sashes within one frame. One of the sashes is above the other, and the lower sash slides vertically, the other sash is fixed.

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Single Slider

A window with two separate sashes within one frame. One of the sashes is beside the other. One of the sashes slides horizontally, the other sash is fixed.

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Double Hung


Similar to a single hung window, except both the upper and the lower sashes slide vertically.

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Double Slider


Similar to a single slider window, except both sashes slide horizontally.

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Shaped

Fixed or picture windows made in a particular geometric shape to fit your window needs. Some operating windows can be made in geometric shapes; they tend to be relatively expensive.

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Bay

Bay windows are comprised of three windows. The flanker windows project from your house at an angle. The centre window is usually (but not always) wider than the flanker windows and is in a plane parallel to the plane of the house wall but further out.

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Bow

A bow window is a window comprised of 3, 4, 5, or more equal sized windows arranged around the radius of a curve – where each component window is in its own plane.

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Solarium

A bay window with a glass roof. Solarium windows typically project 16 to 40 inches (400 to 1000 mm) from the building wall into which they are installed. They are typically between 36” (900 mm) and “floor to ceiling” height, and can be any length desired.

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Green House/Garden Bay

A solarium window that is small enough that it can be entirely factory-built and shipped as a complete unit.

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Oriel

An oriel window is a form of window which projects from the main wall of a building but does not reach to the ground. An oriel window is most commonly found projecting from an upper floor but is also sometimes used on the ground floor.

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Oriol Single or Double Hung - also known as “Cottage Style”

A vertical sliding window with an off-centre meeting rail.