ATLAS EnergyShield CGF PRO Polyisocyanurate Foam Core 4' X 8'

ATLAS EnergyShield CGF PRO Polyisocyanurate Foam Core 4' X 8'

Regular price $36.99 Sale


Atlas EnergyShield CGF Pro (formerly Rboard Pro) is composed of a Class A fire rated closed cell polyisocyanurate (polyiso) foam core faced with a high performance coated glass facer on the front and back. EnergyShield CGF Pro combines high R-value, Class A durable glass facers, and water resistive barrier attributes in a high performance rigid insulation board. Panel sizes are 4ʹ by 8ʹ or 4ʹ by 9ʹ. Panels can be supplied in nominal 16ʺ or 24ʺ widths for use in cavity wall applications. Custom sizes are also available.


EnergyShield CGF Pro is recommended for use in both commercial and residential applications due to the Class A fire rating.

Common applications include:

  • Exterior cavity walls
  • Exterior sheathing for walls framed with wood or steel studs
  • Exterior or interior Cl (continuous insulation) for emu/block/concrete wall systems
  • Exterior Cl for installation over wood or gypsum sheathings
  • Use over existing cladding to improve energy efficiency and provide a level surface prior to installing new cladding
  • Interior walls only, or interior ceilings only, without requiring a code approved thermal barrier (approval per NFPA 286) in certain building types


    • ASTM C1289, Type II, Class 2
    • NFPA 285 (consult Atlas for our extensive list of approved assemblies)
    • ASTM E84 Flame Spread, less than 25
    • ASHRAE 90.1 / ASHRAE 189.1 / IECC / IGCC Continuous Insulation Standards
    • International Building Code (IBC),  Section 2603
    • International Residential Code (IRC),  Section R316
    • Water Resistive Barrier ICC-ES ESR-1375
    • California State Insulation Quality Standards and Title 25 Foam Flammability Criteria (T 1231)
    • UL Listed for flame Spread, see BRYX.R13089
    • UL Standard 263 (ASTM) E119) hourly rated wall approvals (see UL Online Directories for 13 designs)
    • PE Evaluation of fire properties, see TER 1306-03


    The configuration of weather resistive barriers and/or air barriers used in conjunction with EnergyShield CGF Pro is the responsibility of the designer. Atlas recommends sealing into rough opening flashing and to other portions of the building, including the roof and below grade. Atlas EnergyShield CGF Pro coated glass-mat facers are compatible with most standard joint fillers, sealants and adhesives. Consult the product manufacturer for specific compatibility.



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