In preparation for mounting the track for the barn-style doors, a level line is drawn across the opening and onto the walls at the appropriate height.
A 2x6 is then ripped in half and, using the line as a reference, the first piece is centered on the opening and screwed to the wall framing.
The second ripped piece screws to the first with the bottom edges flush to each other creating a 3-inch-wide header for attaching the door track.
Track from a standard lumberyard knock-down pocket-door kit is cut using a reciprocating saw. Lengths of 62 3/4-inch lengths were cut for each side, which would leave enough space for inserting rollers in the middle.
The track sections were screwed to the split header flush with both ends, and flush with the outside edge of the track. This positioning left enough space between the wall and the panels for them to clear the jamb casing when they opened and closed.
After screwing the roller hardware to the top of the door panels, the first panel is slipped into the track and the rollers were adjusted until the edge was plumb.
The rollers for the next panel slipped through the gap between the track pieces, allowing that panel to slide into its track on the other side.
A tiny wrench that came with the pocket-door kit was used to adjust the height of the second panel until the two panels lined up perfectly. Adjusting the doors with the exposed track was much easier than adjusting the height of a regular pocket door.
To hide the track assembly, trim is nailed to the header. Almost any kind of trim could be used, but for this project, a length of inverted baseboard created the first layer.
The first layer is returned to cover the ends of the track. Then a layer of panel molding was added along the top edge.