You should add 2 1 2 to the height of the actual door.
Rough opening for 36 inch barn door.
36 x 84 barn doors.
The difference between a rough opening and finished opening is usually 2 3 inches.
This can be done with an existing door finished opening or a rough opening where you can see the 2x4 s.
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.
Ideally the door will cover 2 to 3 inches beyond the opening on each side.
Using a tape measure begin at the left edge of the opening and measure straight across to the right edge.
The center of the handle should be about 36 inches from the bottom of the door.
In this example the opening width is 32 4.
The rough opening for a 36 inch pre hung door is is 38 5 inches by 82 inches.
Place the outside handle near the edge of the door as you would any handle or door knob.
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.
The rough opening should be one inch wider than the frame and 3 4 of an inch higher than the door.
For the inside handle keep in mind that the door is wider than the opening.
Masonite z bar knotty alder interior barn door slab with sliding door hardware kit view the masonite barn doors 499 00 499 00.
Add 4 to the measurement and you have your recommended door width.
Presuming the door is a 36 inch wide door the dimensions of your opening should be 37 inch wide by 81 inch tall.
Make sure your door opening reinforces the wall above and on both sides of the door.
While a standard door height is 80 finished opening.
For reference standard interior door widths range from 24 36 finished opening.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
Just add 2 to the width of the actual door size.
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.
This will give you room to space the door frame off of the sub floor.
Reasons for door opening sizing when a pre hung door is being installed into an opening there have to be considerations for leveling the door and ensuring that it has an obstruction free swing.
The door will need to hang off the wall a couple of inches in order to slide.
As a result the door must be wider than the opening to eliminate sightlines from angles around the opening.
Total door width will be 36 why add 4.