How to Cut Crown Mouldings With a Sliding Compound Miter Saw
One of the benefits of cutting crown molding on a compound miter saw is that you can lay the molding flat on the saw when you cut it. In contrast, if you were using a basic miter saw you would need to stand the piece of molding against the fence.
Because the corners in your house may not be exactly square, for the best fit on interior corners, cope the molding. A coped cut on one wall is placed over a straight on the adjacent wall. According to Jay Silber in his book "Decorating with Architectural Trimwork", the boards at an inside corner tend to separate and as the wood later contracts, a coped corner exposes the wood of the molding on the adjoining wall rather than creating a noticeable dark gap between the walls.
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Instructions
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45 Degree Molding Inside Corner Left Side Cope
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1
Set the saw tilt left to 30 degrees.
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2
Set the miter angle right to 35.3 degrees.
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3
Place top of molding against saw fence, with the scrap to the right of the saw blade.
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4
Cut the molding.
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5
Cope the molding.
45 Degree Molding Inside Corner Right Side Cope
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6
Set the saw tilt left to 30 degrees.
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7
Set the miter angle left to 35.3 degrees.
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8
Place bottom of molding against saw fence, with the scrap to the right of the saw blade.
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9
Cut the molding.
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10
Cope the molding.
45 Degree Molding Outside Corner Left Side Miter
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11
Set the saw tilt left to 30 degrees.
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12
Set the miter angle left to 35.3 degrees.
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13
Place bottom of molding against saw fence, with the scrap to the left of the saw blade.
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14
Cut the molding.
45 Degree Molding Outside Corner Right Side Miter
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15
Set the saw tilt left to 30 degrees.
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16
Set the miter angle right to 35.3 degrees.
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17
Place top of molding against saw fence, with the scrap to the left of the saw blade.
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18
Cut the molding.
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1
Tips & Warnings
Before beginning, sketch an outline of your room and plan the type of cut you will need to make for each corner.
Make test cuts on scrap molding.
As you face the corner of the room, the piece of molding that goes on the left hand wall is the left side cut. Conversely the molding on the right hand wall is your right side cut.
These instructions explain how to cut molding on a compound miter saw to fit 45-degree crown molding to a 90-degree corner. If you are using 52/38-degree crown, simply change the saw tilt setting in each section below to 33.9 degrees and the miter angle to 31.6 degrees.
Use extreme care when using a compound miter saw.
