Interior door casing  is the term used to depict the trim found around a door opening. As per This Old House, “Entryway housings are both beautiful and utilitarian, improving the appearance of the entryway while additionally disguising the progress between the divider and the frame.”

Basic doorway casings are composed of only three separate pieces – two long trim pieces on one or the other side of the door jamb finished off with a more limited piece (the head packaging) to finish the edge. To better understand the type of door casings that might be best for your home, it assists with realizing the distinction among mitered and butted door casings.