It is important to select insulation with high R-values that is also safe. The flammability of the insulation is a crucial factor to take into account; after all, no one wants to use flammable insulation. As far as I’m concerned, is fiberglass insulation combustible?
Fiberglass insulation is non-combustible, however it can melt at high temperatures. In addition, the brown paper used as a vapor barrier on batts might catch on fire. Non-flammable blown-in fiberglass is another option, although it necessitates specialist installation equipment.
There is no clear yes or no response to this question. Fiberglass insulation doesn’t burn, but it can still be a contributing factor in a fire in your home.