FSK paper class A retardant, so no need for foil-face polyiso?
I’m separating FSK paper [foil-scrim-kraft paper] into its own question, since my original post got bit too long with other sub-topics.
So I am looking at what other options besides drywall and foil faced polyiso I can do in the crawlspace and basement.
As I was doing research, I found that FSK paper has same Class A ASTM-E-84 fire rating. So sound like it is a viable option for covering netted blown in cellulose in the floor rafters.
I know state insulation program contractor (here in MA) used FSK paper in my kneewalls to cover the netted densepack cullulose and said that was ignition barrier.
Here is the product I am talking about: