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While many people may think that a window is nothing more than a frame and some panes of glass, windows are actually much more complicated and include dozens of intricate parts that must work together smoothly. Windows even come with their own jargon, so if you want to understand how to describe your windows like a pro, take a look at the next installment in our dictionary of windows!

Apron: A window apron, also known as a window skirt, is a board attached to the wall that stretches below the window stool (see below).

Glazing: This refers to the panes of glass within a window. A window can include several panes of glazing, and the spaces between the glass are filled with a gas like argon or krypton to help insulate the window. Additionally, glazing compound is a type of putty that is used to hold the glass in place.

Jambs: The jambs, which run vertically along the sides of the window, are a critical part of the window frame, and they hold the sash (the part of the window that moves) in place.

Muntins: The grid pieces found within a window’s panes of glass. While some muntins are purely decorative and snap into place over the glass, other muntins actually hold the glass in place by supporting smaller panes of glass known as lights. On thermal-insulated windows, muntins may be installed between panes of glass; windows with interior muntins such as these tend to be much easier to clean.

Operator: The crank handle that is used to open or close casement or awning windows. It is connected to the scissor arm (see below).

Scissor Arm: Also known as the extension arm, the scissor arm is the mechanism that extends to open a window or retracts to close it when the operator is cranked.

Stiles: Located on the sides of a window, the stiles are the vertical supports that help to hold the window’s frame and sash in place.

Stool: Better known as the window sill, the stool is a small shelf-like feature that extends from the bottom of the window into the interior of the house. Window stools come in a wide range of sizes.

For more information about the windows we offer, including the Alaskan window system, visit our website!