My first option was unfaced insulation held in place by firring strips or tiger teeth and a poly vapor barrier. The local contractor doesn't stock unfaced insulation, and will not order the small quantities I need.
So I am doing this with kraft faced, but I don't want to leave the paper exposed for fire hazard reasons. Drywall is too heavy for me to do on my own, it almost triples the cost of the project, and I am concerned about weight on the ceiling anyway. Are there any lightweight options to cover this?
There are no state or county building codes that affect me (please don't reply about this, I checked thoroughly). I am just trying to mitigate safety with cost.