CBECC-Com material not in library
What if a material being used in my design is not listed in the CEC/CBECC-Com material library?
You will need to select a material from the library with similar thermal properties to the material being used. You can find the material library in spreadsheet form as part of the CBECC-Com installation in the C:\Users(your username)\Documents\CBECC-Com 2013 Data\Documents\RulesetSource\CEC 2013 Nonres\Rules\Tables folder of your computer.