Doors, track, and hardware
Measuring tape
Hacksaw
Safety goggles
Work gloves
Electric drill and wood bits
Screwdrivers (flat-bladed and Phillips)
A bifold door is commonly used on closets, particularly in bedrooms, because it folds neatly out of the way. Each door consists of two panels connected with leaf hinges. Mounting hardware at the top of each door fits into a guide track screwed to the head jamb, while hardware at the bottom fits into a small pivot bracket that's screwed to the floor.
1.
Install the Guide Track
Screw the guide track to the head jamb following manufacturer's instructions. To shorten the track to fit the opening, cut it with a hacksaw. (Be sure to wear safety goggles and gloves when cutting metal.)
The track can be concealed by a wood strip (Fig. 1). The strip usually does not come with the other door hardware.
2.
Install the Pivot Bracket
Screw the pivot bracket to one of the side jambs; sometimes there will also be a provision for running a screw into the floor. (Fig. 2)
3.
Install the Door
Install the guiding stud and the top and bottom pivot studs on the doors; holes for these are usually predrilled by the manufacturer. Set the door's top guide and pivot studs into place; then swing the door so that the bottom pivot stud aligns with the pivot bracket and drop the door into place. (Fig. 3)
Adjust the height of the door by turning the pivot in the bottom bracket clockwise to raise the door or counterclockwise to lower it.