Hi everyone I was recently talking to a plumber and we got on the topic of insulation. He mentioned there was a product on the market (a spray foam of some sort) that is just one canister (Typically spray foam has 2 from what I have seen). He said that you spray this foam into the joist (its about 1 inch thick and then you follow by placing your fiberglass batt insulation. He said its the best of both worlds and cheaper then doing complete spray foam.
I forgot to write the name of the product down.