Installing Crown Molding on Angled and Rounded Corners for a Professional Finish

Installing crown molding around rounded corners in a room can be daunting, but with a little bit of practice and skill, it can add a beautiful, decorative touch to the room. The process is similar to installing crown molding in a room with straight corners, but the trick is taking extra measurements and angles into consideration. The following steps will show you how to properly measure, cut, and install crown molding around rounded corners.

Start by measuring the walls where you want to install the crown molding. Measure twice and make sure to record the measurements accurately. Rounded corners require extra pieces of molding and you should adjust your measurements to accommodate this. Set your miter saw to a 22 ½° angle and measure the length of the angled corner. Place a long enough piece of molding flat on the table and fence of your miter saw. Depending on if the inside or outside of your corner is being cut, you should adjust your angle accordingly for the first cut. You can the mark the length you acquired in your measurements and line it up with the blade without the saw being turned on. Give the length a bit more for several adjustment cuts in the middle piece.

Next, you should cut another piece of molding 8-10 inches long at the same angle at both ends. Split this piece in half and adjust your miter saw to 45°. Cut the squared end of each piece at 45°. Place the middle piece (the first piece you made the adjustments to) against the wall and match the 22 ½° with each of the last two pieces. The middle piece should be a bit longer than the other two, so gradually shave the end until you get a perfect fit of the three pieces.

At the other ends of the rounded corner, the pieces should be mitered to match the adjoining molding. Make these cuts at 45° and begin to fit them in place against the wall. Start in the corner, butting the pieces together with no gaps. Secure them in place using finishing nails and a bead of caulk along the top of the corner. Fit the second piece to the other end of the middle piece and find the studs along the wall with your stud finder. Mark the studs with your pencil for easy referencing. Nail the molding into the studs to secure it safely in place.

Continue this process with the remaining pieces of crown molding and fill in the nail holes with wood filler. Fill in any small gaps with a bead of caulk and sand down any excesses. Finally, paint or stain the crown molding to match the other moldings in the room. Stand back and appreciate your hard work; you have successfully installed crown molding around rounded corners!