Regarding Window Terminology: Often, there is more than one term used to describe a particular part or style of window. This portion of our website does not claim to be “the final authority” on such terms – it merely defines the term Clear Creek Windows uses. In general, when more than one term is in common usage for a particular part or style of window, Clear Creek Windows attempts to use the most common term used in the market area it generally operates in.
I. Main Parts of a Window
Approximately 1.5” x 1.5” (40mm x 40mm), the sash is the part of the window that is attached to the glass and moves with the glass.
The approximately 1.5” x 1.5” vertical parts of the sash.
The approximately 1.5” x 1.5” horizontal parts of the sash.
For a single or double hung window (see “Window Styles” section), the meeting rail is the part of the window comprised of the top rail of the lower sash and the bottom rail of the upper sash.
The small moulding approximately 1/2” x 1/2” (12mm x 12mm) that holds the glass into the sash. For windows built without sashes (picture windows – see “Window Styles” section), the glass stop is the similar moulding that holds the glass into the frame.
Comprised of the head, jamb, and sill that together form an opening in which the sash fits.
Horizontal component that forms the top of the window frame.
Vertical components forming the sides of the window frame.
Horizontal component that forms the bottom of the window frame.
When two or more window frames are joined together “side-by-side”, the frame members that form the vertical “posts” are no longer called “jambs”; they are called “vertical mullions”.
When two or more window frames are stacked one on top of the other, the frame members that are a combination of the sill of the upper window and the head of the lower window are called “horizontal mullions”.
Solid piece of material that separates two pieces of glass within the same sash.