Window Casing & Trim Ideas


A careful pairing of window casing and trim transforms a simple window into the visual focal point of a room. Detailed wood trim complete with carvings or inlays adds an elegant touch while simple styles complement modern design aesthetics. Choose window casing and trim that suits the style and color of the rest of the room to create a cohesive space.

Mitered Joint

  • Mitered joint window trim is the most common window trim used in contemporary building. Mitered joint trim is comprised of four sections of molding joined at their corners by angled joints. The fit of mitered joint trim is tight and clean. These simple window trims are best matched with an internal window casing that is in an identical wood and stain; however, a casing in a shade lighter than the trim creates an airy feeling and a subtle visual contrast. Choose mitered joint window trim and casing if you want your windows to be a functional and understating aspect of your interior design. Opt for a natural wood finish or white paint for simple rooms; mitered joint trim is also especially well suited for more bold finish choices like high gloss black or striking red.

Butt Casing

  • If your room is better served by a more elegant and sophisticated window treatment, the more distinguished butt casing and trim is an option. Unlike mitered joint casing, the joints of butt casing are flat and meet at the top edge of the glass window pane; the top trim is usually a large piece of milled wood called a reveal that resembles crown molding. Butt casing and trim are more detailed than mitered joint trim; white paint offers little visual distraction from the detail of the carved wood. One disadvantage of butt casing is that it is one of the weakest joints, but it is also one of the easiest joints to mill and install. Pair butt casing with dramatic window treatments in rich colors to add an additional element of luxury.

Craftsman Style

  • Craftsman style homes were a staple piece of architecture during the American arts and crafts movement of the early 20th century. These artistic bungalows featured careful craftsmanship of natural materials as the main design element. Craftsman-style window casing and trim feature the simple butt casing, but rather than a simple joint, the corners are defined by square wooden blocks decorated with carved rosettes or fleur de lis. In many Craftsman-style homes, the window trim and casing are left matching and natural with light stains. However, a white paint paired with light colored window treatments is also in line with the Craftsman style.

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