This can be done with an existing door finished opening or a rough opening where you can see the 2x4 s.
What is the rough opening for a 36 interior door.
Verify the rough opening is level and plumb.
Not sure if your measurement is accurate.
While a standard door height is 80 finished opening.
The standard height of the rough opening for a door is the door height plus 2 5 8 inches.
So using the information above as an example a door that is 32 wide and 96 tall requires a rough opening 34 wide x 98 1 2 tall.
A pre hung door has a frame attached to it.
Timely prefinished interior steel frame.
Typically a pre hung door is measured in 30 inch and 36 inch sizes with additional sizes available in non standard widths.
The rough opening for a 36 inch pre hung door is is 38 5 inches by 82 inches.
A opening width 4 1 2.
Approximately 2 inches are added to the width and 2 1 2 inches to the top.
A 36 x 80 pre hung single door will use a rough opening of approximately 38 1 2 x 82 1 4 to fit.
For a 3 0 x 7 0 door frame.
B opening height 2 1 4.
The diagonal measurements should be the same.
Presuming the door is a 36 inch wide door the dimensions of your opening should be 37 inch wide by 81 inch tall.
More rough opening tips.
The door would be called a 2880 28 32 wide 80 96 tall.
Maximum allowable deviation from square is normally 1 4.
Verify the rough opening is square.
The doors are also a standard 80 inches tall.
Verify the width and height of the door frame are each 1 2 smaller than the rough opening width height.
Many carpenters prefer to use pre hung doors to save installation time.
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.
The additional room allows for a 3 4 inch top jamb a shim.
What is the rough opening of a 36 inch door.
Always remember to square up your door before you nail the frame in place to assure it will close properly.
How to size rough door frame openings.
When framing nonstructural interior walls it is important to size door openings carefully since small deviations from the correct dimensions can mean the.
The rough height of the door openings are the height of the doors plus 2 1 2 3 4 for the jamb plus 1 1 4 for flooring plus 1 2 for leveling.
Use shims and or caulk to seal gaps between wall and frame.
The rough opening should be one inch wider than the frame and 3 4 of an inch higher than the door.
The rough opening size for a 24 inch interior door is 26 by 84 1 2 inches.