The rough opening is taller and wider than the assembled door jambs to allow space for the jambs plus a little extra for shimming the assembly should the opening not be exactly plumb or square.
Frame of a doorway.
The unfinished natural wood frame can be installed to either side of the door opening.
Cut the header to fit between the king studs.
Make a header by fitting two 2 x 8s around a 1 2 inch piece of plywood.
A king stud is one that runs continuously from the top plate usually a double plate to the bottom plate.
By scott grice issue 201 if you can cut a 2 4 and drive a nail then you have all the skills you need to frame door rough openings.
Install a cripple stud between the header and the top plate halfway between the king studs.
This domestically produced pocket door frame includes the track installation hardware and instructions.
Toenail the cripple stud to the top plate and the side of the header.
Anyone with any experience marking and cutting lumber and driving nails can easily frame a doorway.
To make the door header cut 2x4s to the width of the original opening.
Cut 2x4s to the height of the door plus 1 1 2 inches 5 1 cm to allow room for the top of the frame and allowance for leveling the jamb.
Frame a door rough opening a pro carpenter teaches you his 3 simple rules for framing door rough openings efficiently.
A typical residential door is 32 inches wide and 80 inches tall so the rough opening is 34 inches wide and 82 inches tall.