Although custom doors do cost more money.
Interior door opening height.
You should add 2 1 2 to the height of the actual door.
The standard height of the rough opening for a door is the door height plus 2 5 8 inches.
An 80 inch door is called a 6 8 door pronounced six eight.
Framing rough opening sizes are really quite simple.
On average you can expect to pay roughly 20 25 percent more for a custom door.
The height for all passage doors must be a minimum of 80 inches and the standard width sizes for interior doors are 24 28 30 32 and 36.
Standard widths for interior doors are 24 28 30 32 and 36 inches while the height must be a minimum of 80 inches.
The additional room allows for a 3 4 inch top jamb a shim.
The minimum recommended door width to allow persons with disabilities to pass through is 36 inches.
Just add 2 to the width of the actual door size.
The height of common doors is 6 feet 8 inches.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
Standard interior door height is 80 inches.
This will give you room to space the door frame off of the sub floor.
For a pre hung door measure the width and height of the slab the rough opening space between the studs with no door installed and the thickness of the jamb.
Custom doors can be made to match any size door opening.