What Is Loose Fill Blown Fiberglass Insulation?

Loose-fill blown fiberglass insulation is made from virgin fiberglass meaning there are absolutely no chemicals or additives applied to it – simply it’s pure glass. It is installed by pneumatically injecting it into wall cavities, attics and crawl spaces until it reaches a specified density to achieve a specific R-Value rating.

Among the many benefits of blown in fiberglass insulation is its ability to resist moisture, mold and combustion while maintaining density without the long-term effects of settling found in other forms of insulation. While blown in fiberglass can be installed in existing and new-construction buildings alike, its ability to be installed in an existing home with minimal structural altercation make it an excellent choice.

Benefits of Fiber Glass Insulation

Batt, Roll and Blown-In Products Deliver Sustainable Performance

Since the introduction of fiber glass insulation in 1938, it has remained the preeminent insulation material for commercial and residential construction. Over the years, fiber glass insulation has proven its ability to make buildings more energy efficient, reduce utility costs and increase occupant comfort. These and other important attributes have given it a new life as the leading insulation material in many of today's green building projects.

Sustainable Building

One of its key advantages is value. Fiber glass insulation has a lower installed price than many other types of insulating materials and, for equivalent R-Value performance (i.e., thermal resistance), it is generally the most cost-effective option when compared to cellulose or sprayed foam insulation systems.

Thermal performance and energy efficiency

Fiber glass insulation helps make buildings more thermally efficient by better retaining the desired temperature of enclosed spaces, whether they are heated or cooled. Its thermal performance reduces utility costs for building owners, conserves nonrenewable fuel sources and provides greater occupant comfort.

Additionally, fiber glass insulation offers design flexibility. Greater amounts can be installed in some sections of a building to increase overall thermal performance and compensate for areas with lower thermal values, such as windows and doors. It enables a wide range of R-Values, giving the specifier more options for meeting provincial and national energy code requirements.

Loose-fill fiber glass can be blown-in with pneumatic devices to meet almost any R-Value requirement. Blown-in fiber glass insulation also can be installed over existing batt insulation in renovation projects to increase overall R-Value.

Moisture resistance

When exposed to moisture, fiber glass insulation neither absorbs nor holds water.

Fire resistance

Made from sand and recycled glass, fiber glass insulation is naturally noncombustible and remains so for the product's life. It requires no additional fire-retardant chemical treatments.

Acoustic control

Fiber glass insulation is a naturally sound-absorbent material that significantly reduces sound transmission in wall, ceiling, floor and HVAC assemblies.

Recycled content

Between 1992 and 2000, the fiber glass insulation manufacturing industry recycled more than 8 billion pounds (3.6 billion kg) of pre- and post-consumer glass containers, eliminating the need for millions of cubic feet of landfill space. Fiber glass insulation has significant recycled content, with some batt, roll and loose-fill insulation products containing up to 80 percent recycled glass. The other main ingredient in fiber glass insulation, silica sand, is an abundant, naturally renewing resource, limiting environmental impact in the manufacturing process.

Green Factor

Fiber glass insulation packs multiple green performance features into one product and still comes at a very competitive price when compared to other insulation materials. After 70 years on the market, it's an excellent choice with a tried-and-true track record.

Why Should I Choose Blown Fiberglass Insulation?

  • Contains no formaldehydes
  • Resist the settling and gapping typically found in cellulose insulation.
  • Seamless installation, no gaps or voids
  • Free from harsh chemicals because it's made from pure glass.
  • Flammability testing shows blow-in fiberglass resists combustion.
  • Will not rot, mildew or promote the growth of mold.
  • Has a superior noise reduction quality.
  • Installs easily in existing structures.