DuPont Thermax Light Duty NH Insulation

DuPont Thermax Light Duty NH Insulation is a non-halogenated durable, glass-fiber-reinforced insulation with aluminum facers and is designed as an insulation and interior finish system for walls and ceilings in metal, wood post frame and concrete or masonry buildings.

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Product Description

Thermax Light Duty NH consists of a glass-fiber-reinforced polyisocyanurate foam core faced with nominal 1.25 mil embossed white thermoset-coated aluminum on one side and 1.25 mil embossed aluminum on the other. The tough 1.25 mil white embossed aluminum surface makes it a durable insulation/finish choice for use in moderate-impact areas, and it can be pressure-washed up to 1,000 psi with a 15-degree or greater spray tip (at 3’ minimum distance). Thermax™ Light Duty NH meets the USDA requirements for “Incidental Food Contact Materials” when used as surfaces not in direct contact with food, such as floors, walls, ceilings etc.

Thermax Light Duty NH also offers high, long-term thermal resistance, with facers that help prevent water and water vapor intrusion into the insulation foam allowing it to stabilize at a higher R-value(2). Used in conjunction with the appropriate joint closure system for the application, Thermax Light Duty NH – with its low perm rating – can help to reduce moisture condensation within and behind the insulation.

Ease of Installation
Thermax Light Duty NH:

  • Installs quickly to walls and ceilings – inside and outside of purlins, trusses or bar joints
  • Can be installed exposed to the interior without a thermal barrier
  • Helps reduce the potential for condensation within the wall assembly
  • Lightweight and easy to handle – can be sawed or cut with a knife, small hand saw or circular saw

Sustainable Solutions

  • Thermax Light Duty NH is manufactured with a zero ozone- depleting potential. The use of Thermax Light Duty NH helps reduce the carbon footprint of commercial buildings.
  • Thermax Light Duty NH uses halogen-free flame retardants and is manufactured with zero ozone-depleting potential.

Available Sizes
Sizes, R-values and edge treatment options for Thermax Light Duty NH can be found in Table 1 of the TDS tab below. Contact your local sales representative for additional sizes.

Physical Properties
Property and Test Method                                                                   Value
Compressive Strength(2) , ASTM D1621, psi                                       25.0
Flexural Strength, ASTM C203, psi                                                     40 min.
Dimensional Stability, ASTM D2126                                                 0.4% max
Water Absorption, ASTM C209, % by volume, max.                             0.1
Water Vapor Permeance, ASTM E96, perms                                       <0.02
Maximum Use Temperature, °F                                                             250
Light Reflectance, Visual Light Spectrophotometer, %                         65
Surface Burning Characteristics(3), ASTM E84 for
both foam core and finished product                                                Class A
Flame Spread                                                                                          25
Smoke Developed                                                                                <450

Applicable Standards
Thermax Light Duty NH meets ASTM C1289 – Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board, Type I, Class 2. Applicable standards include:

  • C203 – Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
  • C518 – Standard Test Method for Steady- State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
  • D1621 – Standard Test Method for Compressive Properties of Rigid Cellular Plastics
  • D2126 – Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging
  • E96 – Standard Test Method for Water Vapor Transmission of Materials

Thermax Light Duty NH complies with the following codes:

  • CCRR 0440 Code Compliance Through Intertek
  • AC 12 Compliance
  • DRJ TER NO. 1506-03
  • NFPA 268 – Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source
  • UL 1715 – Standard for Safety Fire Test of Interior Finish Material-Walls and/or Ceilings
  • NFPA 286 – Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth-Walls or Ceilings
  • 2021, 2018, 2015, 2012, 2009 International Building Code (IBC)
  • 2021, 2018, 2015, 2012, 2009 International Residential Code (IRC)
  • 2021, 2018, 2015, 2012, 2009 International Energy Conservation Code (IECC)
  • 2021, 2018, 2015, 2012 International Green Construction Code (IGCC)
  • 2019 California Green Standards Code
  • Intertek CCRR-0440

Contact your DuPont sales representative or local authorities for state and local building code requirements and related acceptances.

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General Insulation Company Inc. is an insulation supplier / insulation distributor that stocks and fabricates a wide variety of industrial and commercial air barrier, vapor barrier, moisture and water barrier products for the construction market.

Thermax Light Duty NH Technical Data Sheet