Is it ok if I just put tyvek moisture barrier and skip out on the fanfold insulation or rigid foam insulation? SO basically it would be my sheathing tyvek moisture wrap and vinyl siding? Would that be enough protection?
Of course you don'tHave you ever tried thinking?
Not sure what climate is like where you are, but any insulation, no matter what R value, is better than none at allNot only for heat from a furnace, but air conditioning tooYour house also loses temperature control faster to normal heat loss and cold entry if no underlay insulation is presentReally give this some thoughtBecause if you do, and you realize later it would have been better that you had, the costs of removing siding, installing insulation and then replacing the siding will cost a very pretty penny.