Any cons to exterior wood fiber insulation other than cost?

I was pretty set on using unfaced EPS for exterior insulation given the price, cold temp r value, and permeability but I just learned a local insulation contractor is importing… I was pretty set on using unfaced EPS for exterior insulation given the price, cold temp r value, and permeability but I just learned a local insulation contractor is importing…Read MoreGreenBuildingAdvisor