Need to reinsulate attic in older house
I recently purchased a 38 yr old colonial in RI. Inspecting the attic I noticed very thin white batts (wool, maybe fiberglass) with deteriating kraft paper. I removed all the old insulation, sealed all gaps/penetratins with spray in foam and now want to add blown in cellulose to an R50-R60 level.
I'm a little confused about the best approach for a vapor barrier. Should I lay down 6-mil plastic or just put down a cheap krafted fiberglass (say R11-R13) and blow cellulose on top? Batts seem straigh forward but if plastic, how do you properly install it?
I was initially thinking of just spraying in a 1" foam but this stuff would cost about $800 alone.