Q. How far beyond the window must a curtain rod extend?

Answer

When it comes to curtains it is important to know a few terminologies. These terms are clearance return and projection. Clearance is open space between the wall and the curtain measured with respect to the curtain rod bracket. Return is the distance between the wall and the center of the rod while projection is the measurement between the wall and the end furthest point of the curtain rod bracket or drape whichever is larger. Generally it is recommended that the curtain rod extend at least 3 inches beyond the curtain.