Diy Exterior Bifold Doors . Pencil round, chamfered, square and decorative. To install a hinged pair of doors fold doors together and engage top pivot in the top socket and the top guide in the track. Golden Oak Timber Glazed Folding Patio door, (H)2094mm (W)2994mm from www.diy.com Flugel 180 straight sliding door hardware. Add horizontal slats on middle of doors. See more ideas about bifold doors, doors, bifold barn doors.