Usually refers to flapping material that is joined together and is slightly warped or twisted causing one or more edges to be higher or lower than the adjoining material.
Applying a decorative strip to the edge or edges of a composite panel.
A decorative strip applied to the side edges of laminated boards. MDF - Medium-density fibreboard, a man-made sheet material that can be worked like wood and is used as a substitute for it.
Laying brick so that the top edge of the unit is set in from the plane surface of the wall.