When insulating a portion of a structure such as an addition or re-roof, how can code compliance via the performance analysis method (ref MEC 402.2) be demonstrated without doing a whole-house analysis?
Architect and code official are obsessed with the prescriptive method. I want to use a solid foam nailbase system with better overall performance and a thinner profile. How can I satisfy 402.2 for a small area of the roof without doing a full structure modeling analysis?
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