i have a circa '64 house with about 4 inches (original) of blown insulation in the attic. being 40 years old, it is pretty compressed and, given my location, woefully inadequate. i purchaced some non-faced FG batts to go over the top and was all set to install them when i noticed that most of the attic has no vapor shield under the cellulose!
so, do i....
a) move the cellulose, install the plastic, put it back, and then install the batts?
b) move the cellulose, chuck it, and install faced batts with a higher r value?
c) let sleeping dogs lie and just fiberglass and forget?
d) run screaming for the hills?
you make the call!
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