For example let s say we want to frame a 6 8 x 3 0 front entry door.
Rough in dimensions for french doors.
Just add 2 to the width of the actual door size.
The rough opening would be 40 1 2 x 86 1 4 for a 3 0 x 7 0 door frame.
You should add 2 1 2 to the height of the actual door.
This takes into account the thickness of a standard 3 4 inch doorjamb on each side.
Framing rough opening sizes are really quite simple.
If you re going to frame a rough opening for a door then you ll need to know the unit size.
If you have questions give us a call at 888 458 5911.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
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.
Of frame is 40 x 86 as the frame face is 2 around all 3 sides.
The difference between a rough opening and finished opening is usually 2 3 inches.
Refer to the charts below to determine what size of door you will need.
For reference standard interior door widths range from 24 36 finished opening.
The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide.
Standard door rough openings.
While a standard door height is 80 finished opening.