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Select an Attic roof assembly that has the appropriate level of ceiling insulation in the EnergyPro Assembly library. For a high performance attic with above deck insulation edit the input for “Above Deck Insulation” (or if doing Prescriptive compliance “Exterior Insulation”) and put in an R-Value for the insulation. For a high performance attic with below deck insulation edit the input for “Below Deck Insulation” (or if doing Prescriptive compliance “Interior Insulation”) and put in an R-Value for the Insulation.
If you do the below deck approach, you should not include a radiant barrier since the insulation will be up against the barrier and will negate the product effectiveness.
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