Carefully saw along the profile on the face of the molding.
How to cut crown molding on angled walls.
If using a compound miter saw set bevel angle to 0 no bevel on an inside corner the top of the molding will be shorter.
Cut a 45 degree angle.
Then i adjust the saw to make an opposing miter cut at the same angle into the end of.
Next you need the angle of the wall or in my case cabinet you are trying to go around.
Move the handle on your blade until your indicator matches the desired angle.
Here is the only math.
Nail the crown molding in place with the coped end pressed tightly against the piece of crown.
On an outside corner the bottom will be shorter.
Cut a 45 degree miter onto each end of a length of crown.
Place the molding upside down against the stop blocks.
On the end that fits into a wall corner use a coping saw to cut a coped joint.
The saw can be adjusted to cut at any angle set it to 45 degrees for one side of a standard 90 degree corner.
The following two chart shows settings are for all u s.
Rest bottom of molding against the fence and top of molding against table.
Next you set your jig to reflect that angle in my case 52.
Using a power miter saw is the best way to cut crown moulding angles.
The best way to do it is to make a small transition piece of crown molding that acts like the crown is being installed on a flat ceiling on one side of the piece but on the other edge it is making a transition as if the crown molding is climbing a stairway making the bend that happens as you transition from the sloped ceiling along the stairs to the flat ceiling below or at a flat landing.
My angles were 45 degrees.
Cut crown molding at a 45 degree angle to prepare for coping.
Before you cut make sure the direction of the miter matches the slash mark.
Adjust your blade to cut at an angle based on your wall s angle.
It s a best practice to cut crown moulding upside down on the miter saw.
45 miter for 90 walls.
Fine tune the coped cut with a file and sandpaper.
Standard crown molding with 52 and 38 angles and assume that the angle between the wall is 90.
The chart at the end of this article lists the appropriate miter bevel settings for both 52 38 and 45 45 ceiling wall crown moldings with angle between wall ranges of 67 179.
The saw can be set to 45 degrees to the left or 45 degrees to the right.
Set miter angle to half wall angle.
Otherwise divide the angle of your corner by 2 to determine the angle you need to cut your crown molding.
When the 1 x 4s fit on the wall i lock the saw blade angle and make a cut into one of the lengths of crown.
If your wall is 90 degrees set your miter saw to cut at 45 degrees.