BLOWN-IN FIBERGLASS AND CELLULOSE
Blown-in Fiberglass, also known as loose-fill insulation, is a low-density fiberglass product that is blown onto an attic floor. It's typical R-value ranges from 3.1-3.4 per inch. Most people choose to do 10.5" of blown-in fiberglass for R-30 or 13" for R-38. Blown-in is the least expensive insulation option available to insulate your attic.
While blown-in insulation is not as effective as spray foam, it does a decent job at separating the hot, humid air from your attic and the cool-conditioned air inside your home. Many homes in Florida have original blown-in or batts that have settled or shifted overtime due to people doing work in the attic, tropical storms and hurricanes blowing the insulation around, or humidity causing it to settle. Adding more insulation can help to keep your house cool and save up to 20% on your electric bill.