This takes into account the thickness of a standard 3 4 inch doorjamb on each side.
Rough in dimensions for french doors.
While a standard door height is 80 finished opening.
Standard door rough openings.
The difference between a rough opening and finished opening is usually 2 3 inches.
For reference standard interior door widths range from 24 36 finished opening.
Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening.
If you re going to frame a rough opening for a door then you ll need to know the unit size.
Just add 2 to the width of the actual door size.
For example let s say we want to frame a 6 8 x 3 0 front entry door.
The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide.
To correctly determine the size of a rough opening for double or french doors measure the size of each door.
You should add 2 1 2 to the height of the actual door.
The rough opening would be 40 1 2 x 86 1 4 for a 3 0 x 7 0 door frame.
Framing rough opening sizes are really quite simple.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
Of frame is 40 x 86 as the frame face is 2 around all 3 sides.
To get the total width multiply the width of each door by 2 and add 2 inches.
So if each door measures 30 inches wide the width of the rough opening should be 62 inches.
Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide.