Installing fiberglass batts in attic
I have recently finished up air-sealing my unfinished attic, and am going to be installing R30 faced fiberglass batts in between the joists. My question is in regards to how aggressively should I be pressing down on the batts when I install them? Do I need to really push down on them to make sure that the vapor barrier on the batt is pressed closely to the attic “floor” made up of drywall? Or should I be focusing on keeping the batt as uncompressed as possible so that its R-value does not drop, even if this means that the vapor barrier on the batt isn’t pressed directly up against the attic “floor”.