I bought 2 kinds of duct insulation from HD- fiberglass backed with foil and a sticky rubber backed with foil.
What side goes against the duct- the foil or the fiberglass/rubber?
I did seal the ducts first.
Thanks for all your help, everybody. BTW, the Frost King fiberglass is a huge itch-fest. Go for the rubber stuff, even if it's a lower R-value.
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