Thermal Conductivity and Rigid Foam
I’ve read this discussion of point thermal bridges from a few years ago: https://www.greenbuildingadvisor.com/community/forum/green-building-techniques/14937/aecb-website-and-point-thermal-bridges
Has there been more recent research or “industry thinking” as to the impact of thermal conductivity through the fasteners in rigid foam.
I’m planning to do 1.5″ rigid foam outside of plywood sheathing, with fiber cement lap siding (no rainscreen) and fiberglass batts in the 2×6 cavities. Am trying to assess how much better this is than dropping the rigid foam and just doing a better job in the cavity (spray foam).
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