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Crown molding encapsulates a large family of moldings which are designed to gracefully flare out to a finished top edge; generally used for capping walls, pilasters, cabinets; used extensively in the creation of interior and exterior cornice assemblies and door and window hoods. In architecture, pilasters comprise slightly-projecting pseudo-columns built into or onto a wall, with capitals and bases. ...
A cabinet is a body of high-ranking members of government, typically representing the executive branch. ...
Example of cornice laden roof line In classical architecture the cornice is the set of projecting moldings that crown an entablature. ...
In recent times, crown moldings have generally made their appearance as mostly decorated plaster or wooden trim where walls meet ceilings. This article is about the building material. ...
This article describes the wood that comprises trees and boards. ...
This intricate ceiling is part of the Capitol Theatre in Melbourne, Australia, designed by architect Walter Burley Griffin. ...
Installation
Crown molding 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 molding's end, it, the ceiling, and the wall form a 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 miter 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 miter and then to use a coping saw to undercut the miters. A miter saw (also called mitre saw) is a tool used to make accurate crosscuts and miters in a workpiece. ...
A coped joint Coping is the woodworking technique of shaping the end of a moulding or frame component to fit the contours of an abutting member. ...
A coping saw. ...
Another way and the easiest way to install crown molding is by using crown corner blocks. This eliminates the need for miter cuts or coping; the molding is installed with a straight flat cut.
Many different companies now manufacture crown molding in materials such as plastic and foam. These typically are offered with corner blocks, and are popular with DIY home improvement enthusiasts. See also: DIY Network, a cable TV network. ...
This article is about the television series. ...
Angle calculations The calculation of the angles to cut crown moulding is afffected by the angle that the plane of the moulding makes with the walls. Crown moulding is usually sold in either a 45 degree or 38 degree format, so correct angle determination should be made before attempting to cut the moulding.
The formula used to calculate the angle to make the cuts in a spreadsheet is:
- Cell 1 - slope a (in degrees!)
- Cell 2 - A15*PI()/180
- Cell 3 - slope b (in degrees) (note: slopes a and b will be the same when figuring crown molding)
- Cell 4 - C15*PI()/180
- Cell 5 - wall angle (in degrees)
- Cell 6 - E15*PI()/180
- Cell 7 - ATAN((COS(B15)*TAN(D15)+SIN(B15)*COS(F15))/SIN(F15))
- Cell 8 - G15*180/(PI()) = Mitre Angle (in degrees)
- Cell 9 - ATAN((COS(D15)*TAN(B15)+SIN(D15)*COS(G15)/SIN(G15)))
- Cell 10- 90-(I15*180/(PI())) Bevel Angle in degrees
To simplify the cutting process, software can be used to accelerate the calculation process. Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ...
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