How to cut crown moulding with a compound mitre saw

Written by josh weber
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How to cut crown moulding with a compound mitre saw
Crown moulding finishes off a room's decor. (Table and chairs in a room of the smart house image by terex from Fotolia.com)

Cutting crown moulding to fit inside and outside corners can be a difficult task. The use of a compound mitre saw allows the woodworker to cut two angles (compound angles) with one cut. Setting the required mitre and bevel angles on a compound mitre saw produces a precise cut for both inside and outside corners and much facilitates the installation of crown moulding.

Skill level:
Moderate

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Things you need

  • Crown moulding with a 52/38 degree spring angle

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Instructions

    Inside corners

  1. 1

    Set the bevel angle of the compound mitre saw at 33.85 degrees.

    How to cut crown moulding with a compound mitre saw
    Set the bevel angle.
  2. 2

    Set the mitre angle of the saw at 31.62 degrees to the right side of the saw table.

    How to cut crown moulding with a compound mitre saw
    Set the mitre angle.
  3. 3

    Place the crown moulding face up with the top of the moulding against the fence of the saw table and the waste end facing to the right.

    How to cut crown moulding with a compound mitre saw
    Stage the cut piece.
  4. 4

    Make the cut. Keep the left side of the cut. Waste the right side of the cut. This is inside corner piece "A."

  5. 5

    Reposition the mitre angle to a new position set at 31.62 degrees to the left side of the saw table. Leave the bevel set at 33.85 degrees.

    How to cut crown moulding with a compound mitre saw
    Reposition the mitre angle.
  6. 6

    Position the crown moulding with the bottom of the moulding against the table fence and with the waste side to the right of the saw blade. Positioning the bottom of the moulding against the fence is opposite the method used for the first cut piece.

    How to cut crown moulding with a compound mitre saw
    Position the crown moulding.
  7. 7

    Make the cut. Save the left side of the cut. Waste the right side of the cut. This is inside corner piece "B."

  8. 8

    Move inside corner piece "A" into position with the mitre cut firmly positioned into the inside corner and nail it into place. Position inside corner piece "B" on the opposite intersecting wall with the mitre cut joining the mitre cut in inside corner piece "A." Nail it into place.

    Outside corners

  1. 1

    Set the bevel angle of the compound mitre saw at 33.85 degrees.

  2. 2

    Set the saw mitre at 31.62 degrees left of the saw table.

  3. 3

    Place the crown moulding face up with the bottom of the moulding against the fence of the saw table and the waste end facing to the left.

  4. 4

    Make the cut. Keep the right side of the cut. Waste the left side of the cut. This is outside corner piece "A."

  5. 5

    Reposition the mitre angle to a new position set at 31.62 degrees to the right side of the saw table. Leave the bevel set at 33.85 degrees.

  6. 6

    Position the crown moulding with the top of the moulding against the table fence and with the waste side to the left of the saw blade. Positioning the bottom of the moulding against the fence is opposite the method used for the first cut piece.

  7. 7

    Make the cut. Save the right side of the cut. Waste the left side of the cut. This is outside corner piece "B."

  8. 8

    Position outside corner piece "A" and "B" temporarily in place at the outside corner. After fitting the two mitre cuts together, remove piece "B" and nail piece "A" into position. Next, fit and nail piece "B" into position.

Tips and warnings

  • Because corner angles in houses may vary from 90 degrees, pretesting compound mitre cuts using scrap material can be beneficial and save time. Use waste material to test angled cuts for fit and adjust if necessary.
  • Check every piece of moulding to make sure it has the same spring angle, width and thickness or your cuts may be off.

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