Insulated Header Question Rigid Foam

I’m building 2×8 headers for a 4′ span for a 2×6 wall as per IBC. Would it be better to use (2x) 2×8’s (min) with 2.5″ of rigid foam sandwiched… I’m building 2×8 headers for a 4′ span for a 2×6 wall as per IBC. Would it be better to use (2x) 2×8’s (min) with 2.5″ of rigid foam sandwiched…Read MoreGreenBuildingAdvisor