As you can see the standard exterior door size rough opening is a full 2 inches wider than 36 inches and 2 1 8 inches higher than 80 inches.
Exterior door rough opening size.
If you re going to frame a rough opening for a door then you ll need to know the unit size.
Keep this in mind.
Just add 2 to the width of the actual door size.
Rough opening brickmould dim.
Double inswing wide mullion unit and rough opening sizing lf ff ff rf fl fr lf rf fl fr viewed from the exterior hand designations f l r fixed panel left hand right hand inswing outswing.
Standard door rough openings.
The rough opening should be one inch wider than the frame and 3 4 of an inch higher than the door.
The rough opening for a 36 inch pre hung door is is 38 5 inches by 82 inches.
The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide.
Double outswing wide mullion double wide mullion 6 6 6 8 7 0 8 0 rough opening brickmould dim.
This will give you room to space the door frame off of the sub floor.
You should add 2 1 2 to the height of the actual door.
Use shims and or caulk to seal gaps between wall and frame.
Frames that butt wall block or exterior wood stud a opening width 4 1 2 b opening height 2 1 4 the rough opening would be 40 1 2 x 86 1 4 for a 3 0 x 7 0 door frame.
Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide.
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.
The rough opening size is the construction size with the side lumber studs and header.