What is a Sash?

Definition of Sash in Construction
The section of the window that fits into the frame and holds the glass assembly. The window sash is a very common term, however the word sash can be used for a sliding door assembly within another framework. The sash of an item is the overall framework around the item and is used differently within different disciplines on a jobsite and in different parts of the country. The sash of a window is usually the element of the window that is designed to tilt or rotate to accommodate cleaning of the window. The sash is the portion of the window that is assisted in functioning by the balances located within the window frames.