Sash: The part of the window that contains the glass. In specialty windows, the sash can be designed to fit various shapes and sizes, depending on the window’s configuration.

Glass Pane: The glass within the sash, which can be single, double, or triple-glazed. Specialty windows often use custom-shaped glass panes to match the window’s unique design.

Mullions and Mullion Grilles: Vertical or horizontal bars that can divide the glass into sections. They are often used for aesthetic purposes or to mimic the look of divided panes.

​Glass Treatments (if applicable): Specialty windows may include various glass treatments like tinting, frosted glass, or decorative patterns, depending on the desired functionality or aesthetic.

Operator Mechanism (if applicable): For specialty windows that are operable (such as those that include a casement or awning window function), the operator mechanism controls how the window opens and closes. This might include cranks, handles, or other hardware.

Locking Mechanism: For windows with operable components, the locking mechanism ensures security by engaging the window with the frame to prevent unauthorized entry.

Frame: The outer structure that holds the window in place. It can be made from materials such as wood, vinyl, or aluminum, and it’s customized to fit the unique shape of the window. 

Casing or Trim: The decorative moldings or trim that surround the window on the interior and/or exterior. The casing helps to cover the gap between the window frame and the wall and provides a finished look.