Every chance I get, I plug this guy, Joe Lstiburek and his company, BSC, because it is THE best information going regarding building moisture and designs for energy efficiency. If you have not "grazed" any of Joe's writing, I recommend it highly. He has a bunch of free stuff at:
http://www.buildingscience.com/documents/
You can also buy some of the excellent BSC books at:
http://www.buildingsciencepress.com/
And, if you are really daring, go hear Joe speak. Be ready for unbridled, irreverent brilliance and leave with your head spinning (but headed in the right direction) and your soul upset (not all bad):
http://www.buildingscienceseminars.com/
If you have anything to do with buildings, Joe's work is a must.
Thermally Yours,
John
ASNT NDT Level III #48166
The Snell Group
www.thesnellgroup.com
www.thermalsolutions.org
800-636-9820