Which type of insulation is primarily made from treated, ground-up newspaper?

Cellulose insulation is primarily made from treated, ground-up newspaper. This type of insulation is known for being environmentally friendly, as it often utilizes recycled paper products. The paper is treated with fire-retardant chemicals to improve safety and reduce the risk of fire hazards. Cellulose insulation is effective at regulating temperature, providing excellent soundproofing qualities, and is often blown into walls and attics to create a dense thermal barrier.

In contrast, the other materials listed serve different purposes or are made from other substances. Shredded fiberglass is composed of glass fibers and is not derived from paper products. Vermiculite insulation is made from naturally occurring minerals and doesn't involve newspaper. Blanket insulation typically refers to batts or rolls made from fiberglass, mineral wool, or cotton, which are also not made from newspaper. Understanding the characteristics and composition of various insulation types helps in making informed choices for building and renovation projects.