Blown-in insulation, also known as loose-fill insulation, is a type of insulation material made from either fiberglass, cellulose, or other materials. It is installed by blowing or spraying the insulation into cavities, attics, or wall spaces using special equipment. This method allows for a seamless and effective insulation barrier. The insulation materials create a thermal resistance that helps regulate indoor temperatures, keeping your home cooler in the summer and warmer in the winter.