So we try to go to bed one night and the old plaster ceiling is laying on the bed as well as the suspended ceiling that it took with itWe are ripping out the remaining plaster to just go ahead and sheetrock it Should we rip down the lath and old, nasty black insulation up there, or just sheetrock thru the lathe to the ceiling supportsI want to add some insulation also, so additionally, is it better to throw roll insulation in the ceiling, or can I use the blue sheet insulation between the sheetrock and whatever we end up screwing it into?
rolled insulation between the joists would be bestyou could sheetrock directly over the lathe if you clean up all the protrusions and only screw it into the joists, not the lathe, (with longer screws)However, since you've already removed the plaster it's really not much more effort to strip off the lathewithout it, you'd have a cleaner, easier installation, less chance of uneven spots, and a bit more headroom.
It's just a chance to spend more moneyI would put the radiant barriers under the raftersThat way if you have to have something installed that needs to use the attic you don't have to worry about whom ever stepping through the radiant barrier and then the ceiling.
