How would you like to mount your shutter?
Inside Z Mount
Order at the size of your window opening. (Does not work with tilt-in
windows. Requires at least 3/4" of flat space around all sides of the window.)
Outside Face Mount
(Add at least 1 1/4", but no more than 2 1/2"
to each of the 4 sides of your opening measurement for your ordered size.)
How much depth is in your window frame?
Less than 1 1/4"
1 1/4" - 2 3/8" (required for Face Mount )
More than 2 1/2" (required for Z Mount )
Does your window sill protrude?
Protrudes                Does not Protrude
Z Mount shutters ordered for a window with a protruding sill will have a narrower flat frame on the bottom.
For a Face Mount , the frame will go straight across the bottom, and you do not need to add the 1 1/4" to the bottom side.