Seeking an eco-friendly insulation product? Cellulose is an alternative blown insulation made from about 75% recycled paper fiber and 25% fire retardants such as boric acid or ammonium sulfate. It is great for customers who are conscious of their carbon footprint in regard to products they install in their homes. Along with blowing into attics, cellulose can also be applied as a wall insulation. Wall insulation is important to keep your house comfortable and help you save on energy costs. Wall insulation acts as a barrier to keep your heating or air conditioning inside of your home.