Check out Chris Edwards at www.GreenLows.com installing Radiant Barrier Foil from Attic Foil. This video really shows how uncomplicated installing radiant barrier can be. As I mention in the video, the key is NOT to over-think the installation process.
In this video he demonstrates the Open-Ridge Method of installing radiant barrier. This is an excellent method for warmer climates and especially for homes that have ductwork in the attic.
Think of radiant barrier as shade and you are trying to protect your insulation (and the ductwork) from absorbing radiant heat coming off the roof and getting warmer. Simply staple up the radiant barrier and leave an air path for attic ventilation to do its thing.
Attic Ventilation is simple: Create a path for air to come in the bottom of the attic and out the top off the attic. If you install the foil in a way that does not BLOCK this path, you have it correctly installed.
Installing radiant barrier is a great Bang-For-The-Buck DIY project. Now is the best time to install radiant barrier while the attic is nice and cool. You will really appreciate it when the scorching heat comes back next Summer.
Looking for more videos on this topic? Check out my posts below.