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In case you do not have easy access to 90.1. The reference appendices for Title 24 Section 6 include tables giving the U-Values for different wall and roof assemblies developed using the approach outlined in the 2009 ASHRAE Handbook of Fundamentals.
http://www.energy.ca.gov/2012publications/CEC-400-2012-005/CEC-400-2012-005-CMF-REV3.pdf#137
starting on pdf page 137