Basic Guide to Working with Molding

How to Cope
What is Coping?
Coping is the cutting of a contoured end to match the curved profile of a neighboring piece of molding. You'll cut away some of the angled end, following the contours of the profile, so it can nest against the face of its neighbor. The first step is to make a miter cut.

Using the Tool
Use a coping saw to cut away the bulk of the material at the angled end, following the profile. Cut just shy of the contour line, leaving a little of the end grain exposed.

File Down
Use files to do the final shaping, test-fitting the piece as you work. A slightly recessed (back-cut) angle on the end grain will help ensure a snug fit on the front.
Tip: Use the trim-and-try-again method. Cut boards a little long, test fit, and nibble at the board end as needed.

Test It
Test to make sure you have a tight fit for a smooth joint -- the line where the molding's curved face meets the end grain of the miter cut. That line is the shape of the molding profile.