ToughGard® Rigid Liner Board

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Duct liner is used primarily as acoustical liner in HVAC sheet metal ducts to absorb unwanted crosstalk, equipment and air rush noise. It also helps improve the energy-efficiency of the system by reducing heat gain or loss. Plus, duct liner helps minimize moisture problems due to condensation.

A rigid, board-type insulation composed of resin-bonded glass fibers with a durable black mat facing applied to the air stream surface. It is used to line large sheet metal ducts and plenums.

  • Quiet Operation: ToughGard duct liner helps absorb equipment and air rush noises over a broad spectrum of sound. Noise is trapped and dissipated within the glass fiber matrix.
  • Thermal Protection: All products offer excellent thermal-insulating properties and lower HVAC operating costs by reducing energy consumption. This saves natural resources and reduces emissions into the atmosphere.
  • Water Repellency: The thermal properties of duct liner help control condensation, which helps improve indoor air quality by reducing unwanted moisture.
  • Low Emitting: GREENGUARD Gold Certified.
  • Low Air Resistance: The smooth ToughGard air stream surface offers low air resistance to deliver efficient HVAC system operation.
  • Resists Microbial Growth: The air stream surface contains an EPA registered antimicrobial agent in order to reduce the potential of microbial growth that may affect this product. The antimicrobial properties are intended to only protect this product.
  • Durable: The strength and resiliency of the ToughGard surface provides outstanding resistance against puncturing, tearing and other damage during fabrication, installation, and periodic system maintenance.
  • Long-lasting and Non-corrosive: Inert fiber glass will not deteriorate or provide sustenance for vermin or rodents, and it will not corrode the sheet metal it insulates.
  • Cleanability: The smoothness and durability of all ToughGard duct liner products means an extremely cleanable surface during the life of the duct system. The surface of each product can be easily and effectively cleaned with industry-recognized duct cleaning equipment and procedures as outlined in the North American Insulation Manufacturers Association (NAIMA) Duct Cleaning Guide. Proper design, filtration, maintenance and operation of the HVAC system will reduce the need for cleaning.

These insulation products may qualify for rebates and other incentives. For more information, visit for your area’s specific offers.

CertainTeed cares about the environment and Building Responsibly™, and for more than 100 years has maintained a commitment to provide sustainable, innovative solutions that improve energy efficiency and comfort. From production to product, CertainTeed's focus has been on minimizing its impact on the environment by reducing energy consumption, conserving renewable resources and lowering greenhouse gas emissions. And with our Sustainable Insulation® fiber glass products, the mission continues. Visit for more information or watch our YouTube video.

Duct liner products perform in most types of heating and cooling duct systems, operating at velocities up to 6,000 fpm (30.5 m/s) and temperatures to 250°F (121°C).

Duct liner products regularly meet the requirements of the following current specifications, standards and codes:
  • Material Specifications ASTM C 1071
  • Fire Safety Standards NFPA 90A, NFPA 90B
  • Model Building Code ICC
  • GREENGUARD® Children & Schools

All fabrication, application and installation steps shall be in accordance with the requirements of the NAIMA Fibrous Glass Duct Liner standard, or the SMACNA HVAC Duct Construction standard and the project specification. Refer to CertainTeed installation manuals or CertainTeed specification sheets for installation guidelines.

An inspection and preventative maintenance program for the HVAC system is recommended to ensure optimum performance. Insulation should be kept clean and dry during shipping, storage, installation and system operation.
Please refer to the CertainTeed ToughGard Limited Lifetime Warranty
CertainTeed insulation products improve building energy efficiency and reduce building energy consumption for the life of the structure. As a result, they help conserve nonrenewable energy sources, decrease dependence on foreign oil and lower greenhouse gas emissions. In addition, the recycled content of CertainTeed fiber glass insulation meets the EPA Recovered Material Guideline for fiber glass products, 20-25% consisting of pre-consumer and post-consumer glass cullet.

Most CertainTeed fiber glass insulation products have been certified by the GREENGUARD Environmental Institute and meets the GREENGUARD standards for low Volatile Organic Compound (VOC) emissions, including formaldehyde.