How to install Crown
How to install Crown
A web site for understanding and cutting the compound angles for Crown Molding and cornice mouldings
Solution: Use a acute angle jig.
Crown Molding acute angles
Problem: The crown molding angle is more than the settings on my saw.
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Using a prosite protractor makes finding the acute angle, such as a 45
inside crown on a coffered ceiling, easier.
A protractor for in position crown
I posted this as an answer to a question by T from NJ on our Crown Forum
QUESTION: Help cutting a 3 sided Crown box
Part of the answer... "the 45 degree miter for the crown in position is 67.5 degrees, hard to get so you make a jig that is 45, and then cut at 22.5"....
Tim was kind enough to send us some pictures of his jig and the crown when completed below: click for larger images
3 layers,backlit, obtuse & acute to a large radius
The left and right jigs.
The crown cut to the acute angle and ready to install.
On the prosite protractor you would use the single cut to get the angle for an acute cut.
The prosites marks are made to match up with a miter saw table.
For obtuse angles you need to add 90 to the single cut marker to for real world angles not the angles miter saw table.
Click for larger images
Some examples of my crown projects with acute angles:
The 45 45 90 angles
Crown merges at the top
Acute angle with large crown cut on flat, a tough one.
3 layers & backlit
Acute angle to
rying to find your acute angle? ee the angle generator page!
Extreme acute angle with merged crown
Crown Molding miter saw tables
Problem: The angle doesn't match the table saws angle!
Solution: This is how you can adapt the miter saw table.
If you open the above image you will see the protractor angles set onto a miter saws table. Most table saws are set with the 90 degree as 0 degrees, so if you add to the angle on the saw, you need to get to 90. 0+90=90 or
. You can see I've added all of the angles to 360 but you should only need from 0 up to 90.
Understanding the miter saw angle table compared to protractor angles.
Gary's video on crown is very well done.
us so you can
How to install Crown Molding Cutting crown in position Cutting crown on flat How to Install Crown Molding Basics
This page last modified on Sunday, March 09, 2008
Wear saftey glasses.
Follow the safety recommendations on your tools. This is the method I use, I don't recommend anyone else does that is not a professional.
This is a
protractor by Starret for crown.
it in action [Flash]