Measure from the header to the floor to determine the door.
How big should barn door opening be.
For example if you have a 30 opening you would order at least a 34 barn door.
Total door width will be 36.
For the height of your barn door we recommend at least a 1 overlay.
Sheetrocked opening no trim or casing width.
Add 4 to the measurement and you have your recommended door width.
Standard barn door sizes.
You must also make sure that you have enough room on one side of the opening for a single door and either side of the opening for a double door in order for your barn doors to open properly.
To figure out what size track you need double your final width measurement.
Generally most standard barn doors are approximately 36 x 84 or 42 x 80 with enough extra lip to overlap most standard door frames 36 x 80 by an inch or so.
Your next step is to calculate the width of the door s opening starting from inside the door jamb on.
Most barn door sizes fall anywhere between 36 wide on the shorter side by 96 tall on the longer side.
For example if you have an 83 opening you would order at least an 84 barn door.
Measure from inside to inside of the opening.
In this example the opening width is 32 4.
How to measure for a barn door in three steps using a tape measure begin at the left edge of the opening and measure straight across to the right edge.