Exterior door sizes may even be larger.
Barn door measurements.
Total door width will be 36.
Barn door opening measurements while the style of barn door you choose will come down to your personal preference you will need to be aware of barn door vs opening dimensions when making your choice.
Add 4 to the measurement and you have your recommended door width.
In this example the opening width is 32 4.
Measure across for the width and from the top of the casing molding to the floor for height.
Measure from outside to outside of casing molding.
Using a tape measure begin at the left edge of the opening and measure straight across to the right edge.
If the doorway has moldings measure from outside edge to outside edge to determine the proper door width add about 4 to 6 inches to your measurement.
Measure the door width.
The average door width ranges from 24 inches to 36 inches.
Barn door measuring guide for door openings with casing molding.
Sheetrocked opening no trim or casing width.
Add 1 to 2 per door for overlap depending on privacy needs.
Your door s width should be 2 to 3 inches wider than the door opening and 1 inch higher than the dimensions of your opening.
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.
Most barn door sizes fall anywhere between 36 wide on the shorter side by 96 tall on the longer side.
Measure from inside to inside of the opening.