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When you install insulation in an existing closed wall or in an attic, it likely will be a loose-fill product called blow-in cellulose insulation. With an attic, this type of insulation is just one option along with the other popular alternatives, fiberglass batts or blown-in fiberglass. But with enclosed walls, blowing in loose-fill cellulose insulation is still by far the most practical and cost-effective method.

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What is Cellulose Blown-In Insulation?

Cellulose insulation technically can come from any cellular plant source, such as corncobs or sisal. But commercial cellulose insulations are generally derived from wood, and more specifically from paper: recycled newspapers, cardboard, office paper, and other common waste paper products. For this reason, cellulose insulation is considered an eco-friendly home product.

Clem Davis Company Inc. Images Cellulose is "Green"

Its made of 80% post-consumer recycled newsprint. The fiber is chemically treated with non-toxic borate compounds to resist fire, insects and mold.

Clem Davis Company Inc. Images Cellulose Is Safe

It is made of paper, but the chemical treatment provides it with permanent fire resistance. Many professionals consider cellulose to be more fire-safe than fiberglass.

Clem Davis Company Inc. Images Cellulose Resists Air Leakage

Densely packed cellulose blocks air better than fiberglass. Cellulose is made from wood fiber and the cellular structure of wood is naturally more resistant to the conduction of heat.

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How Does It Work?

Step One

Densely packed bales of cellulose are fed into an insulation blower that contain rotating teeth or prongs at the bottom to fluff up the cellulose.

Step Two

The cellulose is blown into the attic/walls through a long, flexible tube that runs from the blower to the application nozzle.

Step Three

The cellulose is allowed to fill the cavities or blanket existing insulation. No pressure is placed on the cellulose; it is allowed to settle over time.

Step Four

Walls are patched up and painted over.

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