How to End Crown Moulding in a Room

Buy crown molding that will match the existing molding, if you don't already have some. You might want to take a sample of the current crown molding to the store with you to ensure that you are able to match the pattern and width that is currently installed.

Measure the distance from the corner of the room to the place where you would like the crown molding to end with a tape measure. Make sure to measure the distance near the ceiling and not the floor as often the measurements are different. Mark the crown molding with the measurement that you get.

Cut the crown molding at the mark that you made with the miter saw at a 45 degree angle. The 45 degree angle will face the wall, not out into the room. You may want to test the cut on a scrap piece of molding first, to be sure that it gets cut the right way.

Cut a 90 degree cut in another piece of crown molding. Rotate the piece of wood, and then cut a 45 degree angle in the same spot as the 90 degree angle. This will create a wedge that will be used to fill the space between the wall and the pre-existing crown molding, like a puzzle piece.

Attach the first piece of crown molding to the wall with the staple gun and then attach the small pie piece to the empty space at the end of the crown molding. The crown molding will now take a 90 degree turn before ending in the corner of the wall.

Spread some spackle to the staple indentation and to the outside corner that you just created. Once the spackle is dry, sand it with the sanding block so that the crown molding contours are visible but any abnormalities are sanded away. Paint with a matching color of your choice and your job is complete.