Greenfiber Cellulose vs Spray Foam ⚔️ | Fire Test & Real-World Performance It’s time for the showdown: Cellulose vs Spray Foam. 💪 We put both to the test to show you the real difference in fire resistance and performance and the results speak for themselves. 👉 Spray Foam: Great air barrier and insulation, but yes it will catch fire under direct flame. 👉 Cellulose: Treated with fire retardants, this stuff barely flinches. You can hold a flame to it all day it won’t ignite. In climates like our