Make a mark about four inches above your window for mounting hardware.
Height to put curtain rod.
For grommet curtains you will need to take into account the placement of the grommet.
For cathedral ceilings leave approximately four to six inches above the window trim as a guideline.
Don t scrimp on length.
For standard drapes that hang on either side of a window the typical height is halfway between the top of the window.
This is a traditional height though you can cheat an inch or so either way depending on the height of your ceiling and the length of your finished curtains.
When you hang the curtain rod high it will make the window appear taller.
Hanging curtain rods high above the window frame adds height to the wall and works best with long panels or drapes.