What is a Lipped
The term lipped is used to describe kitchen cabinet doors. The term refers to inset doors which are designed to allow the door to sit flush directly into the frame. The lip refers to the way the doors retain an overlay on the cabinet face frame. This lipped design allows for the door to fit more securely within the cabinet frame.
Knobs or pulls must be used on lipped cabinet doors to allow for easy opening. Since the lip creates a more secure connection, the knobs or pulls are required to provide the leverage needed for people to open and close the cabinets with ease. Lipped cabinet doors are typically more expensive and more commonly found in custom cabinetry designs