How To Cut A Coped Joint
The outside or decorative side of the board should be short side. You may or may not have trimmed it perfectly. When you see the profile is when you will cut along that line with the coping saw. Once you have the baseboards done as stated above, use your coping saw and follow the lines of the previous cut.
How to Cope Baseboard Trim with a Miter Saw The Family How To Cope Miter Joints on Trim
The face of the clean trim end now has a profile that will trim follow the contours of the trim piece already installed; you just have to cut away the back portion. Switch to a blade with fewer teeth for cutting thick materials like crown moldings. Cut the straight section with a miter saw, then cope the curve with the rounded nose of a belt sander.
Practice on smaller moldings like base shoe or simple baseboards to gain confidence. Cut the second piece to length.
When you make the miter cut, leave the baseboard a flow couple inches too masks long. To set this up, I first clamped a length of molding with its edges flush against the saw's vertical fence and horizontal table. In a coped corner, one molding has a square cut on the end that butts up against the wall.
Run a bead of caulk along gaps between moldings before painting.
Then check again with your square. Coped corners take these elements out of play. I cut away the center of the cleat by making a left-hand and a right-hand 45-degree miter cut, opening a channel for the blade to pass through (3).