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How to Cut Crown Molding

Tom Silva shares some tricks of the trade for cutting crown molding precisely to create a scarf joint and outside corners.

This Old House general contractor Tom Silva shares some tricks of the trade while showing you how to cut crown molding.

In this video, This Old House expert Tom Silva shows you how to cut crown molding. The easiest way to do this is to use a power miter and a coping saw. Use a 45-degree angle to cut crown molding for a scarf joint and an outside corner. For an inside corner cut, you’ll need to measure the exact angles.

Watch the video above for his tips to get a perfect cut and follow the instructions below as you do this yourself.

How to Cut Crown Molding in 9 Steps

  1. To make a scarf joint in the middle of a long run, start by placing the crown molding upside down on miter saw table; hold the molding at the same angle as it will be installed.
  2. Set blade at 45 degrees and make cut in two lengths of molding to create a scarf joint.
  3. To form an outside corner joint, set the saw blade at 45 degrees to the left; cut the first length of molding.
  4. Rotate saw to 45 degrees to the right and cut the second mating molding piece.
  5. For an inside corner joint, square-cut the first piece of molding and butt it tight into corner.
  6. Miter-cut the second piece to 45 degrees.
  7. Highlight the leading edge of the molding with a pencil.
  8. Cut along leading edge with a coping saw.
  9. Smooth the cut edge with 100-grit sandpaper to create a tight joint.

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