The architect Rolf Jacobsen at Gaia Tjøme, Norway, has, together with his son, built an experimental cob building on their property. Because of the cold climate they chose a two layer wall with perlite in between for insulation. You can read a discussion about cob in humid climates in this article, looking especially at the comments thread.
No matter whatever you live — in a hot, cold, dry or humid climate — lean back and watch the video below. If you enjoy it the DVD can be ordered here. (The DVD version of the film has high-quality video and audio and includes extras.)
Please note that David Sheen is a big fan of Christopher Alexander!
Chapter 1 - What's Wrong With Architecture
Chapter 2 - African Earth
Chapter 3 - American Earth
Chapter 4 - Why Earth
Chapter 5 - Empowering Earth
Chapter 6 - Another Earth Is Possible
Chapter 7 - European Earth
Chapter 8 - Arabian Earth
Chapter 9 - Urban Earth
Chapter 10 - Inner City Earth
Chapter 11 - International Earth
Chapter 12 - Future Earth