Insulation Facts

Fiberglass insulation is made from mineral substances processed from molten state to an incombustible fibrous form.

Facings Facts:

Standard facings will burn and should not be left exposed.
Residential facing should always be installed to the warm (heated) side of the dwelling for vapor barrier application.
Vapor barriers must have a rating of 1 perm or less.

Sound Facts:

Fiberglass insulation increases the sound transmission class (STC) rating when properly installed in building assemblies. It has been determined that thickness has greater value in sound control than density.

R-Value:

R-Value means the resistance to the heat flow. The higher the R-value the greater the insulating value.

Flame Spread, Combustion, and Federal Testing:

Unfaced fiberglass blankets, unfaced metal building insulation, metal building insulation, FSK 25 and loose-fill insulation have a class "A" flame spread rating of 25 or less and smoke developed rating of 50 or less according to ASTM E84 test method.*
Unfaced fiberglass blankets, unfaced metal building insulation, and loose-fill insulation have been tested and passed the requirements of ASTM E136 combustion characteristics and are considered non-combustible by major building codes. All unfaced products meets Underwriters Laboratories fire design BZJZ and BKNV.
Metal building insulation has been tested and complies with ASTM C991.**

Recycled Glass Content:

Guardian Fiberglass products contain 30% post consumer recycled glass and 5% post industrial recycled glass.

Additional Certifications:

Miami-Dade County, Florida code compliance for fiberglass batt, blanket, and loose-fill, NO.00-0801.06.
City of New York, Department of Building Code Compliance for unfaced fiberglass thermal insulation code sections 27-232 and 27-348 non-combustibility.
State of California Bureau of Home Furnishings and Thermal Insulation certification product listing license #TA1275.
Compliance with City of Los Angeles, CA requirements for thermal insulations.
Minnesota Insulation Standards Program.
National Standard of Canada CAN/ULC-S702-97 for preformed and loose-fill insulations.
National Research Council Canada CCMC Evaluation listings for batt and loose-fill.

* Metal building insulation and unfaced metal building insulation carry the Underwriters Laboratories fire hazard classification.
** The above flame spread rating was determined when tested in accordance with ASTM-BSA. The standard is used solely to measure and describe properties of materials and products in response to heat and flame under controlled laboratory conditions. This numerical flame spread is not intended to reflect hazards presented by this or any other material under the actual fire conditions. Results are reported to the nearest fire rating.