Definition. Technically, a cornice can be defined as a “molded and projecting horizontal member that crowns an architectural composition.” That means that an interior cornice would reside on the inside of a building and an exterior cornice resides outside.
What is an exterior window cornice?
OVERVIEW. Cornice mouldings (also referred to as crown mouldings) are the uppermost decorative portion of a structure. ... In traditional terms, cornice mouldings protect a structure. They do this by deflecting any rain away from it's walls, though their aesthetic function is just as valuable.