I am brand new to Permies, having been a lurker for awhile! Following the Wofati discussions avidly, and this is my very first post
I have not read Johh's book, but found it online for free here:
http://www.scribd.com/doc/131641374/passive-annual-heat-storage-john-hait
As I looked at the illustration on pg 13, I noticed that there IS a watershed umbrella at the base of the structure, and not just overhead....., which seems to address Micky's original question. Also, John's illustration does indicate a different slope than the Wofati is located on.
I have zero building experience, but I've been interested in green building solutions for a long time. Looking forward to reading/understanding John's book now. and I also look forward to hearing from Paul and his "on the ground" experience on this issue....
