I've always thought barn doors were awesome and wanted to put them somewhere in our house, but didn't know where. It finally hit me that barn doors over the existing patio doors in the basement would serve two purposes; the first being for privacy and second for security. The barn doors fit over the existing blinds that we have installed on the patio doors, but I am thinking of taking them off because no sun ever hits the windows due to the deck covering the patio just outside. You can read more about how we made the barn doors here: http://www.diydesignfanatic.com/2013/01/diy-barn-doors.html
Cost: $600 Difficulty: Advanced
Our barn doors add extra security over our basement patio doors.
Here's the barn door unfinished.
We finished the doors off with some interesting hardware.