A design / build residential and light commercial construction company.
CL # 769640 General B / HIC
Installing crown molding (or moulding). This page of the tutorial and is a step by step photo essay on cutting crown moulding in position to a ceiling that is a cathedral ceiling or has a transition or angle.
Owner Tutorials - How to install crown moulding
Owner Tutorials crown ceiling angles
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Here is a mock up I did, the crown running straight as if it was a horizontal ceiling
The whole trick here is to cut the crown right side up and when you bisect the angle from the ceiling use the miter, not the bevel.
Put your angle finder to the ceiling transition.
The stanley sliding tee bevel
The pro-site protractor is a good way to find the accurate angle, you would just read the red line, the black is the angle.
For this tutorial I used the download below and printed it out.
Transpose that ceiling angle line onto your sheet
The angle I got was 150 degrees the math is so I can get it to the miter saw table
Finally I want to bisect that angle. That is what I'll cut on the miter saw table you see to the right
Here is the miter setting for the 150 degree ceiling transition
Naturally you want to set the bevel, but it's at zero as above.
For the left side, top of the crown up, and miter right.
Holding the crown in position (see the basics page) while you cut
Get a set of crown stops for your miter saw, my onsite saw uses this Dewalt set
The left side in position at the ceiling cut on the bisceting line
Again, no bevel setting. This is my shop miter saw, the 10 inch Bosch at Amazon
For the right side set at your bisection here it's 15 degrees
Hold it in position the top up and miter to the left
The spring angle at 38 not 52 as you do with wall corners
..and finally the finish shots