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What Is Fiberglass Insulation Made Of?

If you’re hoping to make your home or business more energy efficient, you’re wise to consider insulating, but which type should you choose? Fiberglass is one of the most popular insulation materials in use today, popular for everything from attic insulation to wall insulation.

Still, you might be wondering, what is fiberglass insulation made of? How does it work? And is it safe? Find the answers to your questions here.

What Is Fiberglass Insulation Made Of?

As the name suggests, fiberglass is made of glass fibers. This includes several basic raw materials, the most primary of which include silica sand, limestone and soda ash. Other ingredients used in fiberglass production include borax, calcinated alumina, feldspar, kaolin clay, magnesite and nepheline syenite, among others.

Discontinuous glass fibers are used to create batts, blankets or blown-in insulation to resist heat flow and absorb sound. Fiberglass is also available in long continuous fiber used to make everything from drapes and shower curtains to window frames and roof shingles.

How Does Fiberglass Insulation Work?

The process of manufacturing fiberglass insulation gives it the ability to resist heat flow. First, a mixture is prepared with the proper amount of raw ingredients and melted at a temperature of 2500 degrees F. The molten glass flows from the furnace into a cylindrical container with small holes. As the container spins, glass flows out of the holes. A blast of air separates the filaments into short strands, which fall onto a conveyor belt and interlace into a fleecy batt of fiberglass insulation.

The fiberglass fibers trap pockets of air, slowing the movement of heat through it. When installed in a building, fiberglass helps keep conditioned air inside and can decrease heating and cooling costs as a result.

Is Fiberglass Insulation Safe?

Fiberglass is an excellent choice from a fire safety perspective because, without any additional additives, fiberglass is fire resistant. However, it’s important not to handle fiberglass with your bare hands because tiny glass particles can irritate your skin and sometimes cause a rash. Inhalation can also result in coughing and other respiratory ailments.

This is why you should leave installation to an experienced professional. Once in place, fiberglass poses no health risks or safety hazards.

Install Fiberglass Insulation in Your Idaho Building

At Big City Insulation of Idaho, we install residential and commercial insulation in new construction and retrofit projects. To learn more about fiberglass insulation, or to schedule services, contact us today!

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