CO2 emissions with materials

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I am trying to model the CO2 emissions with various wall configurations. One that I wanted to model is a 2x6 (cellulose infill) wall with a wood fiber exterior insulation. From an energy standpoint, you can use polyisocyanurate with a lower R-value/in to portray this insulation material. However, from a metric tons/yr standpoint, a wood fiber exterior insulation would look worse than polyisocyanurate. Does anyone have any comments, or are there plans to update the material database with BEopt?

Thanks,

BEopt does not perform life-cycle assessment (LCA) analysis. BEopt does not look at the embodied energy of materials or material processing or transportation, etc. The properties in the BEopt material database are specific to the materials' thermal performance.The few references to CO2 that you'll find in BEopt are for converting building energy consumption to the equivalent CO2 emissions.

If you are looking for a LCA tool, you might look at NIST's BEES tool: https://ws680.nist.gov/bees