Step 1
Measure the angle of the wall for the end cap. Use a 360-degree adjustable protractor to get the correct angle of the wall. Use a stepladder to get up close to the ceiling for an accurate reading.
Step 2
Cut the crown molding for the angle found in step 1. (See Resources below for a miter chart that will give you with the correct angle to set the miter saw for your cut.) Crown molding is cut upside down on a miter saw. Set the crown molding against the miter saw fence so the bottom of the crown is even with the fence. Use miter saw stops to keep the crown molding in the correct position when cutting the crown molding. Adjust the miter saw to the correct angle and cut the crown molding.
Step 3
Place the next section of crown molding into the miter saw, and cut the other half of the joint.
Step 4
Dry fit the two pieces together on the ceiling, and check the fit. The joint should be tight with no gaps.
Step 5
Trim the end cap portion of crown molding to the desired length with a 45-degree end cut. Cut the corresponding 45-degree cut on a long piece of scrap.
Step 6
Cut the scrap crown molding flat on the miter saw with the back resting on the miter saw table. The blade needs to leave 1/16 inch at the bottom of the crown molding to make a small piece of the crown that will return into the wall.
Step 7
Glue and clamp the return together with painter's tape and wood glue. Let this dry before installing the end cap to the crown molding on the ceiling. The painter's tape works well as a clamp for small pieces of trim. After the trim has set, remove the painter's tape.