Unfaced Fiberglass Batt Insulation
Common Product
MasterFormat 07 21 00 Thermal Insulation; 07 21 16 Blanket Insulation; 07 21 23 Loose-Fill Insulation

This information reflects our best understanding of product composition in 2019.

Fiberglass batt insulation is a thermal insulating product with high thermal performance, moisture resistance, fire resistance, and is sound absorbent. Fiberglass insulation is fabricated using a molten glass batch consisting of raw materials (...

More about Unfaced Fiberglass Batt Insulation

Fiberglass batt insulation is a thermal insulating product with high thermal performance, moisture resistance, fire resistance, and is sound absorbent. Fiberglass insulation is fabricated using a molten glass batch consisting of raw materials (sand, borates, soda ash, lime) and recycled glass cullet. The molten glass is spun into fibers and an atomized binder is applied as the fibers settle onto a conveyor to form batts which are then conveyed through an oven to cure the binder. Originally phenol-based formaldehyde binders were used, but fiberglass batt insulation manufacturers have now transitioned to formaldehyde-free binders. (Note that high density fiberglass insulation, outside the scope of this CP, may still use formaldehyde-based binders.) Fiberglass batts can be either unfaced or faced with a Kraft paper, foil, or polyethylene film vapor retarder. This CP describes unfaced fiberglass batt insulation (distinct from faced fiberglass batt). Unfaced fiberglass batt insulation is installed by placing the batts into the wall cavity, allowing friction to hold the insulation in place. Frequently the insulation is then covered with a separate vapor retarder (e.g. polyethylene film), which is placed over and stapled to the studs before installing gypsum board. Moisture-resistant gypsum board is generally used without a separate vapor retarder for unfaced fiberglass batt in places such as bathrooms to allow moisture to escape. This CP excludes any vapor retarders that may be used with unfaced fiberglass batt insulation.

A historical version of this CP is available here: https://www.pharosproject.net/material/show/2202610

Name % Wt Whole Function GS Score Sources
Fiber glass, biosoluble and/or with alkaline oxide and alkali earth oxide content ≤18 % by weight
65997-17-3
90.00% Insulator Subscribe to view
Carbohydrate-based binder
8.75% Binder Subscribe to view  
RESIDUAL OILS, PETROLEUM, SOLVENT-REFINED
64742-01-4
1.25% Dedusting Agent Subscribe to view
Name % Wt Part % Wt Whole Function GS Score Sources
Fiber glass, biosoluble and/or with alkaline oxide and alkali earth oxide content ≤18 % by weight
65997-17-3
90.00% 90.00% Insulator Subscribe to view
Carbohydrate-based binder
8.75% 8.75% Binder Subscribe to view  
RESIDUAL OILS, PETROLEUM, SOLVENT-REFINED
64742-01-4
1.25% 1.25% Dedusting Agent Subscribe to view

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Known or Potential Residuals
Known or Potential Residuals for Chemical
CASRN NAME GS SCORE TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCE
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Other Process Chemicals
CASRN NAME GS Score TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCES
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HBN Resources (4)
HBN Resources for Product
TYPE TITLE
Report Post-Consumer Cullet In California
Report Optimizing Recycling: Criteria for Comparing and Improving Recycled Feedstocks in Building Products
Report To Increase The Use Of Recycled Content In Building Products: Reduce Health Hazards & Improve Feedstock Quality
Tool Insulation Hazard Spectrum
Sources
Sources for Common Product Data
Source Uploaded Document Linked Document
ATSDR Synthetic Vitreous Fibers
CertainTeed EPD
CertainTeed SDS
CertainTeed TDS
EcoBatt Webpage
EcoTouch EPD Summary
IARC Monograph Man-made Vitreous Fibers
Johns Manville Patent
Johns Manville Patent 2
Johns Manville SDS
Johns Manville TDS
Knauf Declare
Knauf EPD
Knauf Patent
Knauf SDS
Knauf TDS
OC EcoTouch HPD
OC Patent 1
OC Patent 2
OC TDS