If you’re replacing a door, correctly measuring the opening will be essential. The below information is provided to help you determine the correct measurement for your type of application. For measurements per application type, please view our Resource Guide - Rough Openings.
The space cut into a wall to accommodate a door.
Is measured from outside of jamb to outside of jamb, and may vary 1/16" +/-.
Is measured from outside of Brickmould to outside of brickmould.
Clad Inswing dimension is calculated using the Crownline brickmould profile.
For Classic brickmould, add 2-9/16" to the Clad Inswing UD. BM may vary 1/16" +/-.
To calculate RO when using a spread mull, add the width of the spread mull(s) to the appropriate rough opening.