We have rounded outside corners throughout our house what is the best approach to installing crown cornice molding?

The baseboards that are currently installed just come to a 90˚ point and the gap is filled in with putty, trim paint, mud, or combination thereof.

Any suggestions for a finely finished look to go with the rounded corners?

  • I've never used it -- I prefer the angled look like in Doresoom's answer below -- but have you looked into flexible crown molding.
    – Niall C.
    Jan 31, 2011 at 14:08
  • didnt undestand , what degrees you used for this corner? bevel and miter
    – user11501
    Feb 8, 2013 at 15:41
  • what is the approximate diameter of the curve?
    – bib
    Feb 8, 2013 at 15:48

1 Answer 1


You can add a center section at the corner that runs at a 45° angle to either wall. That cuts down on any gap you might have, but makes the installation and cutting a bit more difficult. My house has a few faux pillars that use this technique:

enter image description here

(I know, I know, I haven't gotten around to touch ups after we painted the walls...)

And here's a lookup table for cutting crown molding (source):

enter image description here

  • 3
    Nice answer and great chart. Thanks for the info. Jan 31, 2011 at 9:44
  • 1
    Keep in mind that the chart is useless if you assume that corners are 90 degrees. You've got to accurately measure. Oct 1, 2013 at 13:41

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