Step 1: Measure from wood framing on the pocket side to wood framing on the closed side. This is your rough opening width (RO width). To determine the door size you want, take the RO width and subtract 1 inch. Take that number and divide it by 2. This is your door width. For example, if you have a RO width of 61”
Step 2: These calculations allow room for some of the door to be hidden in the pocket to block the view of the interior pocket. It also allows space on the inside of the pocket for a bumper, and some fine-tuning adjustments. See the diagram below for the top view layout of this example.
Note: This is the minimum coverage for the doorway. The door can be larger if desired.
Step 1: Measure the height from the rough floor to the top header, this is your Rough Opening Height (RO Height). If your door is under 200 lbs, the maximum door height will be the RO Height -3.5” (assuming ¾” finished floor thickness) or -2.75 if measured from finish floor.
Step 2: If your door is over 400 lbs your maximum door height will be RO Height -4.75” (assuming .75” finished floor thickness) or -4” if measured from finish floor