If your barn door is 1 5 thick then you would have 1 between wall and door.
Barn door distance from floor.
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Ideally the door will cover 2 to 3 inches beyond the opening on each side.
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In this example the total height is 80 once mounted the door will hang 1 off the floor which will add the bit of coverage you need at the top of the opening.
When the door is hung the center of the door width will line up with the track above.
For the door height we recommend measuring from the floor to the top of the opening.
The center of the rail will mount 2 above the door 3 above the opening which will be close to the center of 2 8 blocking.
Once you ve established your desired door size.
Again for doorways with moldings measure from the top edge.
Our standard track sticks out just 2 inches from the wall.
That depends on the thickness of your barn door.