My place is on 5 acres outside city limits and last year my fire insurance went up $500/month. I am in the process of stripping all of the shitty siding off of the mobile home and barn and am looking at adding 1 1/2” Rockwool Comfortboard 80 (rated non combustible by UL) all the way around the outside for several reasons and the non combustible rating is one of them then cladding the whole thing in metal siding (and a metal roof). My question is are there any industry standards on fire resistance that I can go by to get an underwriting memo with my insurance to save some money? I have done a lot of Googling and can’t find a definitive answer