Greenguard Fanfold Siding Underlayment

My question is do i install fanfold foam insulation over the substrate and then put housewrap over the fanfold or do i put the housewrap on and then fanfold over that and then vinyl siding any help with this would be greatly appreciated. Home accessories 3 8 fanfold insulation sheathing underlayment 3 8 fanfold insulation sheathing underlayment cellofoam s poly shield heat laminated sheathing. It is designed to lay flat to.

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