According to houzz this tip can come in handy for ceilings 10 feet tall or higher consider a rule of thumb allowing 1 of width for each foot of ceiling height.
Crown molding different ceiling heights.
For 9 foot ceilings 3 to 7 inches and for 10 foot ceilings 3 to 8 inches.
For standard 8 foot high ceilings the crown cornice height should be 2 to 6 inches.
Adjust upward for larger rooms.
Webber this crown is paired with crisply milled dentil molding and beaded baseboard.
Distinguished dentils photo by wendell t.
The continuous header idea is an additional bridge the same height as the moulding on the 42 unit which is attached to the ceiling with the same continuous crown on it spanning across the lower 30 unit.
This scenario includes both ways to end a lower level crown on adjacent cabinets.
Some suggested crown mouldings for 9 foot ceilings.
The height of the room as you can probably imagine the height of the ceilings in a room really play a role in whether or not crown molding is good choice.
The crown moulding does not have to be at a 45 degree angle.
You can alter the angle to get a lesser projection with good looking results.
These larger crowns are often built up using 2 or more moulding profiles and are also referred to as a cornice.
I m going to show three examples of ways to deal with crown moulding at different heights.