by Lynn Byrne
“If you are going to walk the walk, you should talk the talk.”
“The beginning of wisdom is the definition of terms.” –Socrates
Mullion, muntin, stile and jamb may sound a bit like a nursery rhyme but considering how much we like to “dress” them and the important contribution windows make to architectural beauty, it is important to know the names of the key parts, don’t you think?
MULLION: a strip of wood or metal within, but not at either end, holding the panes of glass in a window. This term is synonymous with MUNTIN. The vertical piece on either end is called the STILE (see below)
JAMB : the vertical parts that form the outer sides of a window frame. This piece does not move up and down.
SASH: this is the part that moves up and down. It is the frame holding the panes of a window. Usually there is an upper sash and a lower sash. The vertical part of the sash is the STILE. The horizontal part of the sash is the RAIL.
Photo credits: first image. Window diagram. pink and blue window heart window orange window map shade breeze photo by Bruce Berrien arch window kitchen window woman last image my own, a throwback from Blogtour London