Cellulosic Fiber Loose-Fill Thermal Insulation, or Cellulose Insulation, is basically a chemically treated, recycled cellulosic fiber such as shredded newspaper and/or cardboard. This insulation is most commonly used in attics and other enclosed spaces of dwellings and other framed buildings. The included image shows a sample of commonly available cellulose insulation whose base stock is shredded, recycled newspaper. It is not uncommon to find debris such as plastic bags, likely a result of the use of recycled products, in the insulation.
ASTM International standards specify characteristics that cellulose insulation must meet in the following categories: design density, corrosiveness, critical radiant flux, fungi resistance, moisture vapor sorption, odor emission, smoldering combustion and thermal resistance. The critical radiant flux and smoldering combustion categories of the standards relate specifically to the ignition and combustion of cellulose insulation.
Keep an eye out for future posts with even more information!