Long ago there were several insulation materials available: Rockwool, Vermiculite, Fiberglass, Cellulose, Mineral-Wool, all sorts of stuff. Over the years we’ve seen many come and go; they were found to be dangerous, ineffective or impractical. Today there are basically two choices: Fiberglass and Cellulose. The confusing thing is that Fiberglass is available in two forms: rolled batting or blown, and Cellulose is only available as a blown material. It’s not that difficult to figure out which one is best.

Cellulose

• Lifetime guarantee
• Non-toxic, safe
• No itching
• Rodent resistant
• Insect resistant
• Mold/mildew resistant
• 10.4″ to attain an R38
• Soundproofing
• Soft material
• Non-flammable

Fiberglass

• No Guarantee
• Hazard-warning label
• Very itchy & irritating
• Rodents nest in it
• No resistance to insects
• No resistance to mold/mildew
• Requires almost 15+″ for R38
• Minimal soundproofing
• Rigid glass fibers
• Melts in a fire