ASJ-Faced Fiberglass Board Insulation
This information reflects our best understanding of product composition in 2019.
Fiberglass board insulation is made from inorganic glass fibers that are typically held together with a phenol-formaldehyde binder, and formed into rigid rectangular boards. Up to 53% of the product comes from recycled content. It is frequently...
Fiberglass board insulation is made from inorganic glass fibers that are typically held together with a phenol-formaldehyde binder, and formed into rigid rectangular boards. Up to 53% of the product comes from recycled content. It is frequently used to insulate HVAC ductwork, plenums, and industrial equipment. It can be installed either on the interior or exterior of ductwork, but products installed on ductwork interiors contain a protective coating, known as air stream surfacing and are beyond the scope of this CP. In addition to providing thermal insulation in areas where the carried air is cooler or warmer than the ambient air surrounding the ductwork, it also provides acoustical insulation, damping the noise of the HVAC system as well as cutting down on cross-talk. Fiberglass board insulation can be used in a variety of other applications such as interior acoustics and ceilings. At least two products currently available are marketed for use in exterior walls, and one is marketed for roof paneling systems. The insulation is manufactured unfaced or with a vapor barrier such as an all service jacket (ASJ) or foil-scrim kraft (FSK) facing. This Common Product focuses on fiberglass board insulation with an ASJ facing. At least one manufacturer offers a formaldehyde-free product.