I recently had fiberglass blown in my attic replacing 30 year old nasty stuff that floated in the air as a fine particulate. The new stuff they use is not as fiberous, shaped liked cheese curls, doesnt break down as easy. I still would cover it with fabric that got down to the 10 micron range. Might consider contacting your local insul installer for a couple of buckets of that stuff.
Alternatively you could use cellulose HomeDepot offers for blow in.
Alternatively you could use cellulose HomeDepot offers for blow in.