Fiberglass Insulation

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Fiberglass Insulation

Fiberglass insulation is made from glass or sand particles that are processed to create a fibrous thermal barrier. Some manufacturers use recycled glass materials (up to 30%), which has greatly reduced concerns about the environmental impact of fiberglass production. As a cost-effective way to insulate homes and commercial buildings, fiberglass comes in rolled batt or loose-fill varieties to meet the needs of various projects.

Benefits of Fiberglass

Aside from its budget-friendly design, fiberglass insulation also offers fire resistance, indoor sound reduction, and easy installation. Fiberglass insulation resists mold and mildew, helping protect your home’s air quality and preventing moisture damage to your home’s frame. Fiberglass insulation has long been a favorite of homeowners, contractors, and commercial builders and can be used in conjunction with other layers of moisture protection or added insulation barriers.

Types of Fiberglass

The details of your project will help you decide which form of fiberglass insulation is best for your scope and budget. Understanding the fiberglass insulation options available to you is important to making an informed decision about which insulation suits your needs.

Fiberglass Batt Insulation

As one of the most common and cost-effective insulation options, fiberglass batt insulation comes in easy-to-use rolls in various thicknesses. It is good insulation for attics, walls, crawl spaces, ceilings and basements. Batt insulation is lightweight and can be installed quickly and affordably by professionals. It comes with or without facing, which must be placed according to the manufacturer’s specifications to resist transfer of water vapor. Both faced and unfaced varieties have an R-value from R-2.9 up to R-4.3 per inch.

Faced Batt Fiberglass

Faced fiberglass batt insulation protects against conduction and moisture accumulation. Faced insulation has paper on one side that acts as a Class II vapor retarder when installed facing the hot-warm side during the winter months. It is most commonly installed in vertical walls, and it has a sound transmission class (STC) rating of 39, making it effective in blocking interior sound but less effective against outdoor noise.

Unfaced Batt Fiberglass

Unfaced fiberglass batt insulation does not have an exterior layer of paper, so its main function is to protect against conduction. It does not offer protection from water vapor or moisture and should be paired with a vapor control layer on the exterior of the building when used on outer walls. It is the most commonly used fiberglass batt in climate zones 1, 2 and 3.

Loose Fill Fiber Insulation

Loose fill fiber insulation protects against conduction and achieves an R-value of approximately R-2.5 per inch. While it is slightly less dense than fiberglass batts, loose fill fiberglass insulation offers greater ease of installation, especially in hard-to-reach areas. Blown-in fiberglass is used in attics and pre-built wall cavities and can also be sprayed over existing insulation to increase the overall R-value.

Does Fiberglass Insulation Need to Be Replaced?

While fiberglass insulation can last for 80 to 100 years, it may become less effective over time. After 15 to 20 years, fiberglass batts can begin to lose their structure and may also lose some of their insulating properties. Fiberglass is permeable to airflow, which may lead to “wind washing.” Dust can be blown through your fiberglass insulation, lowering the R-value and negatively impacting your insulation’s effectiveness.

Appropriate Fiberglass Handling 

Proper handling of fiberglass during installation or removal is crucial to the health and safety of the installers as well as the occupants of your home. When disturbed, fiberglass releases small glass particles into the air, which can damage lungs if inhaled or can become embedded in the skin. Professional installers will employ proper PPE when handling fiberglass insulation, including gloves, skin covers, and mouth and nose coverings.

Once the fiberglass insulation is sealed and your project is finished, there are no known long-term hazards. Older fiberglass insulation sometimes contained phenol formaldehyde, which has the potential for low-grade toxic off-gassing. However, the formaldehyde-free fiberglass insulation used today makes the product non-toxic and much safer. 

Using an expert installation contractor will help ensure that proper precautions are followed when installing, removing, and handling fiberglass insulation.

Fiberglass Insulation Contractors Near You

If you are interested in fiberglass insulation for your home or if you are unsure of which form of fiberglass insulation will best suit your needs, the experienced insulation experts at TruTeam are ready to help. TruTeam is the leading installer of insulation projects in the country. All of our professional insulation contractors are fully licensed and background checked.

Contact TruTeam today for a free on-site insulation consultation by one of our local experts.

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