Fiberglass Duct Board Insulation
This information reflects our best understanding of product composition in 2015.
Fiberglass board insulation liner is used to insulate the insides of metal heating and cooling ductwork or plenums. In addition to providing thermal insulation in areas where the carried air is cooler or warmer than the ambient air surrounding the...
Fiberglass board insulation liner is used to insulate the insides of metal heating and cooling ductwork or plenums. In addition to providing thermal insulation in areas where the carried air is cooler or warmer than the ambient air surrounding the ductwork, fiberglass board insulation liner also provides acoustical insulation, damping the noise of the HVAC system as well as cutting down on cross-talk. Fiberglass board insulation is made up of a fiber base held together by a binder. This substrate is then covered with a mat of densely-packed continuous filiament glass fibers and an acrylic coating; together this is known as air stream surfacing. This air stream surfacing protects the surface of the fiber glass board exposed to airflow in the duct, protecting it from damage and moisture. Fiberglass board insulation is affixed to the metal ductwork or plenum using both an adhesive and mechanical fasteners which are outside of the scope of this CP.