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Are You Down With Your Window Lingo? - Wideline

Are you down with your window lingo?


When it comes to choosing windows for your new build or renovation it can all seem a little overwhelming at first, sash this, awning that, transoms and mullions…..what does it all mean? Let’s go through some of the window lingo you need to know to help you with your window selection and you’ll be throwing around words like stile, jamb and reveals in next to no time.

Let's start with the basics, the window frame; 

Generic Window Frames


Now let's move on to the Sash, which is the moving frame that holds the glass of the window. A double hung window is made up of two movable sashes, the upper and lower sash or can also be referred to as the outer and inner sash. On a sliding window the glassed part of the window that slides is known as the sash.

Let's take a closer look at the diagram below;

Window Sash

Other common terms you may come across include:


The strip of material, or ‘moulding’, that attaches to the reveal to cover the gap between plasterboard and reveal. It goes around doorways or windows to cover the transitions of the surfaces. Also used as a decorative feature.

Nailing Fin

An integral extension of a window or patio door frame that generally laps over the conventional stud construction and through which nails are driven to secure the frame in place


The visible part of a window opening that is not covered by the frame, or the recess between the frame and the face of the wall. Before the window is installed you can visibly see entire reveal size from the outside of window. After it is installed the reveal becomes the window or door frame which covers the stud opening.

Stud Opening

The opening size between timber studs in a building. Applies to vertical and horizontal openings.


Are there any other window terms you have heard that you would like us to explain? Get in touch and ask, we will be glad to help.

Thanks to the Australian Glass & Window Association for the use of their diagrams to help explain some of the most common window lingo.