How to Measure for the Call Size of Exterior Doors
We carry several standard sizes for exterior doors. Before you order a door, it is very important to determine the “call size” of the door you will need.
The call size is simply the width and height of the stud-to-stud rough opening in the wall where the entire door (including the frame) will be installed.
This rough opening may be hidden from view by your existing door and frame, so here is how you can arrive at a call size without exposing the wall’s rough opening.
◄ For width open your door and measure the inside aluminum frame from side to side. Round up to nearest even number of inches. The rough opening in the wall is directly right behind this frame.
◄ Now for height measure the inside aluminum frame from header down to the threshold and round up to the nearest even number of inches.
In-Swing Doors and Storm Doors
◄ For width open your door and measure the inside jamb from side to side. Add two inches to get your call size width. Example: Inside the jamb measures 32 inches, add 2 inches to get a 34″ call size.
◄ Now for height measure the inside jamb from header down to the threshold, and add one inch to get the call size height. Example: Threshold to jamb measures 75, add one inch to get 76″ call size height.
To be more certain about determining the call size, we recommend that you measure your existing door as many ways as possible.
We can help you cross reference your measurements and determine the call size for your door.
Note: Some mobile homes that were made before 1985 may have obsolete call sizes!
If you still need help, please contact us with your measurements, and we will help you!
How to Identify Left or Right Hinge: Look at the door from the outside of the home. The side with the hinges determines left or right.
(Example: hinges on the right, right-hinged door)
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