Casing, trim, or moulding? Are you confused? No need to be. These terms are used interchangeably by contractors, remodelers and home pros.
What is casing? Quite simply, it’s a moulding profile which frames (or trims) a door or window. Casing is functional as well as decorative. The main purpose of casing is to surround all doors and windows, covering any space or gap left between the drywall and frame.
In addition, casing is one of the most visible moulding trims in a home, and yet, most homeowners may never think about the style before it’s installed. Rule of thumb: be consistent with your choice of moulding throughout your home.