Coping
A woodworking technique of cutting the profile of a molding on the end of one piece so it fits perfectly against the face of an adjoining piece at an inside corner.
In-Depth Explanation
Coping is preferred over mitering for inside corners because coped joints remain tight even as wood expands and contracts with seasonal humidity changes. The technique involves cutting the molding at a 45-degree angle, then using a coping saw to follow the profile line along the exposed end grain. A properly coped joint results in a seamless intersection that looks professional and lasts for years. Coping is essential for crown molding, baseboard, and chair rail installations. While it requires more skill than simple miter cuts, the superior fit makes coping a hallmark of quality finish carpentry.
Usage Example
Instead of mitering the baseboard at the inside corners, the carpenter coped each joint for a tighter, longer-lasting fit.