Cornices encapsulates a large family of mouldings which are designed to gracefully flare out to a finished top edge. Crown moulding is generally used for capping walls, pilasters, and cabinets, and is used extensively in the creation of interior and exterior cornice assemblies and door and window hoods.

In recent times, cornices have generally made their appearance as mostly decorated plaster, EPX (High Density)and XPS (Low Density) trim where walls meet ceilings.

Installation
Cornices is typically applied along the seams where ceiling meets wall. Usually it is not placed flush against the wall nor against the ceiling. Instead, when viewed from the moulding’s end (or as a cross-section), it, the ceiling, and the wall form a “hollow” triangle. This adds a difficulty to the installation process, namely the need for complex cuts to form corners where two walls meet.

There are two common ways to fashion inside corners. One is to use a compound mitre saw to cut the ends of the corner pieces along two axes simultaneously. The other, called coping, is a two-step process, first to cut a simple mitre and then to use a coping saw to undercut the mitres.

The use of a coped joint for interior corners saves the trouble of having to determine and cut the exact inside degree measurement, since most corners are not exactly 90/45 degrees. Outside corners must be mitred, and care must be taken in measuring and cutting, since not all outside corners measure true. If the angle is not exactly 45/22.5 degrees, a corner measuring device or piece of scrap cornice may be used to obtain the right measurement before the final cut is made.

Hight Density / Low Density Cornics
XPS (Extruded Polystyrene) and EPS (Expanded polystyrene) are two types of polystyrene that is used to manufacture cornice from.

XPS has a smoother finish, and EPS has a slightly rougher appearance.
EPS is a cheaper option, however after the cornice is painted, the difference is hardly noticeable.

Designs
NCD has over a 1000 standard cornice profiles, but for the customer that needs something deferent our in-house design team will custom design something that suit your exact needs.