Measurement Guide

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Rough Opening Tips
Verify the width and height of the door frame are each 1/2 smaller
than the rough opening width/height.
Verify the rough opening is square. The diagonal measurements
should be the same. Maximum allowable deviation from square is
normally 1/4.
Verify the rough opening is level and plumb. The maximum allowable
deviation is 1/8 to 1/4.
What is my Door Handing?
The easiest way to determine your door handing:
Step into the open doorway with your back to the hinges. You will be
standing sideways in the opening, looking at the jamb side where the
door latches. If the door and hinges are on the left side, it is a left-
hand door. If the door and hinges are on the right side, it is a right-
hand door. Simple.