[header] How to install sliding barn doors [title] Measure and cut two lengths of mounting board for each barn door. [substeps] The boards should be as long as the doors and about 1 inch (or 4 cm) wider than the track. [title] Attach the mounting boards to the top and bottom of the doorway using drywall anchors and ensure that the mounting boards run straight along the doorway. 
[title] Measure and cut two lengths of track for each barn door. [title] Use joint brackets to attach sections of track as needed.