Pre hung doors include both the door and the frame that supports the door while slab doors include just the door alone.
Outside door frame dimensions.
Now all you need to know is how to properly frame your door rough opening.
Just add 2 to the width of the actual door size.
This thickness is designed for installation in a standard two by four wall constructed by studs that are.
Measuring for a pre hung exterior door can be tricky.
Of frame is 40 x 86 as the frame face is 2 around all 3 sides.
The standard size for an exterior door is 80 inches by 36 inches which is 6 ft 8 inches by 3 ft.
Use shims and or caulk to seal gaps between wall and frame.
Follow this video for specific steps.
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.
The door jamb is the frame that installs in the wall and supports the door via hinges.
If your slab door is more than 25 years old use a pre hung door to ensure a sealed frame.
For example a 3 foot by 6 foot 8 inch door is a common size.
Is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32 inch widths.
This door panel can have a frame that measures 3 foot 1 1 2 inches by 6 foot9 3 4 inches with a rough opening of 3 foot 2 1 4 inches by x 6 foot 10 1 4 inches.
96 inches or 8 ft.
Some door manufacturers sell doors in 7ft 8ft heights and door widths from 24 inches to 42 inches.
Framing rough opening sizes are really quite simple.
This will give you room to space the door frame off of the sub floor.