KULTULZ
JACK of All Trades ~ MASTER of NONE
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It seems that below the blown insulation there are some even older fiber glass insulation with one face with paper (I assume that would be sort of vapor barrier). Would the paper face of the mineral wool or fiberglass suffice as a vapor barrier.?
thks
Yes, that is called faced insulation and that paper (if properly installed) is a vapor barrier. It is not the best way IMO but is widely used.