Blown in cellulose insulation is made from “fiberized” recycled paper, where the cellulose fibre is separated to create a fluffy insulating material. The material is blown into place to form a uniform insulating blanket, while ensuring coverage in smaller, hard to reach areas. With a professional install, blown in cellulose is effective in the attic cavity, even for “topping up” existing insulation. Here again, proper air sealing is required throughout the installation space to prevent air leakage and air movement. This type of blown in insulation is a very affordable option for many homes.