Split-jamb prehung doors work well in situations where the rough frame is wider than a standard opening. They feature jambs that are split in half lengthwise and the trim casing is already attached to each edge of the jamb, so no mitering is necessary.

What does split jamb mean?

Split-jamb doors have a two-piece jamb that is separated lengthwise and sandwiches the wall between the two pieces. When installing, set the unhinged side in the room with the hinge-stop side in the opening track. The casing is already attached to split-jamb doors, so tack a nail through the casing near the top.

What are the different types of door jambs?

Interior door frame components are typically made from pine, poplar, or other wood species. Jambs generally come in two styles: rabbeted and plain.