How to Build an Exterior Barn Door

This blog post describes the process we used to build a barn door for our dock closet; however, the same steps apply to building a barn door for any room in your house. The only difference is that we used treated wood and plywood.

If you don’t want to build a barn door,, the largest sliding barn door manufacturer in America located in Collegeville, PA is a great source for barn doors.

Here is our dock closet before building/installing our barn door. Neal purchased all of our supplies from Home Depot.


    • treated (if exterior) plywood the size of the door
    • 8 (may need more or less depending on the size of your door) 1×6 treated boards
    • Gorilla glue
    • Deckmate screws (the length depends on the combined thickness of your boards and plywood)
    • barn door hardware
  • Tools:
    • set of saw horses
    • tape measurer
    • chalk reel
    • circular saw
    • miter saw
    • table saw
    • square
    • 2 long clamps
    • 2 small clamps
    • Drill
    • Starrett protractor
    • Long level (optional)
    • planer
    • sander or sandpaper

Note: This material/tool list does not include the door trim.

We started by measuring this treated plywood and cutting it the size we need. It will be the frame for the door. The height will be 84 inches and the width will be 42 inches. Continue reading “How to Build an Exterior Barn Door”