Cellulose Vs. Fiberglass Insulation
Cellulose is ground up newspaper mixed with a boric acid which acts as a flame retardant, mold control, and a pest repellent. Cellulose is much heavier than fiberglass which allows it to be a much better sound barrier as well.
Fiberglass is made 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. This is why fiberglass is used as a filter for HVAC furnaces because air can freely move through it while dirt is caught in the fibers.
Here are a couple graphs demonstrating the major differences between blown in cellulose and blown in fiberglass. The graph on the top right shows the difference between cellulose and fiberglass in the winter.
Cellulose is not only a better product but also save you more money in the end.
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