Check out the second half of the radio show interview from On the House where Ed shared his expertise on energy savings.
In the first part of the second half of the radio program, Ed covers using radiant barrier in a metal shed/barn (that is not being conditioned), painting a radiant barrier and using a radiant barrier with your existing insulation.
Ed finishes up his interview by explaining surface temperatures, roof temperatures and the importance of attic ventilation to get the best results and the most comfortable living space. He also explains why predicting savings is tricky since homes have different variables, and why partial coverage works with radiant barrier.
Very nice. Specially the attic explanation.