Cellulose Vs. Fiberglass Insulation
Cellulose- is ground up newspaper mixed with a flame retardant that also acts as a pest repellent. It’s much heavier than fiberglass which allows it to be a much better sound barrier as well.
Fiberglass- is very many of tiny fibers of glass put together to act as a form of insulation. Fiberglass does have insulating properties, but when matched up against cellulose it doesn’t come close to making a difference on the utility bill as one would hope.
Here are a couple graphs demonstrating the major differences between blown in cellulose and blown in fiberglass.
Cellulose is not only a better product but also save you more money in the end.