Views: 0     Author: Site Editor     Publish Time: 2022-05-06      Origin: Site

What Is Fiberglass Insulation Made Of?

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

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 2,500 degrees Fahrenheit.

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 them. 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 fiberglass is fire resistant without any additives.

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