Blown-in insulation products are competing to bring improved performance per square inch and the least amount of settling over time to the insulation market. Blown-in insulation refers to blowing or spraying insulation product into wall cavities, attics, and floors.Click to see full answer. Similarly, it is asked, what is blown in insulation made of?There are three general types of blown insulation materials currently available: fiberglass, cellulose and rock wool. Fiberglass loose-fill insulation is made glass and sand that are spun or “blown” into fibers. This type of insulation is great for wall cavities and attics.One may also ask, is blown in or batt insulation better? Blown insulation is accomplished by blowing out chunks of either fiberglass or cellulose from the hose of a blowing machine. The main benefit of blown insulation is that it is a much more consistent type of insulation. In short, there is less chance of error with blown insulation as compared to batts. Furthermore, is blown in insulation good? – Blown-in insulation is better for the environment. Blown-in insulation is composed of mainly recycled materials like cellulose and fiberglass. – Blown-in insulation has an R-value between 2.2- 3.8 per inch of product, and while this is still low, the loose material is easier to fit in most areas.What type of blown insulation is best? The best insulation options for an attic are open cell spray foam, fiberglass, and cellulose. Cellulose is the oldest insulation material used for not only the attic, but other areas of the home as well. Fiberglass is another traditional insulation material that consists of extremely fine glass fibers.