ATLAS EnergyShield CGF Polyisocyanurate Foam Core 4' X 8'

ATLAS EnergyShield CGF Polyisocyanurate Foam Core 4' X 8'

Regular price $24.99 Sale


Atlas EnergyShield CGF (formerly Rboard®) is composed of a closed cell polyisocyanurate (polyiso) foam core, faced with a non-reflective coated glass-mat facer on both sides. The blowing agent used to produce the polyiso foam core does not contain any CFCs, HCFCs or HFCs. EnergyShield CGF has zero Ozone Depletion Potential (ODP) and negligible Global Warming Potential (GWP). Atlas EnergyShield CGF combines high R-value, enhanced durability from two coated glass-mat facers, and water resistive attributes in a high performance rigid Wall insulation. EnergyShield CGF is suitable for a variety of continuous insulation (CI) applications.


EnergyShield CGF is recommended for use in residential applications as well as some commercial construction applications, check local building codes for compliance. The coated glass-mat facers enhance the products durability and are more permeable than foil facers.

Common applications include:

  • Exterior or interior rigid insulation (with an approved thermal
    barrier) for walls framed with wood or steel studs
  • Exterior or interior continuous insulation (CI) (with an approved
    thermal barrier) for masonry or concrete wall systems, including exterior masonry cavities
  • Exterior continuous insulation (CI) over wood or gypsum sheathings
  • Use over existing cladding to improve energy efficiency with continuous insulation (CI) and provide a level surface prior to installing a new cladding
  • Approved of use in attics and crawlspaces without requiring the use of a thermal barrier. (ICC-ES A12, Appendix B)
  • Knee wall and vaulted ceiling applications (with an approved thermal barrier)
  • Insulation for use in precast, tilt-up and cast-in-place insulated concrete wall panels
  • Under slab insulation
  • Various OEM applications


    • ASTM C1289 Type ll, Class 2
    • ASTM E84 Flame Spread, less than 75
    • ASTM E84 Smoke Development, less than 450
    • International Building Code (IBC), Section 2603
    • International Residential Code (IRC), Section R316
    • ASHRAE 90.1 / ASHRAE 189.1 / IECC / IGCC Continuous Insulation Standards
    • ASTM E2178 Air Barrier Material – 2) @ 75 Pa
    • Water Resistive Barrier ICC-ES ESR-1375
    • Miami-Dade County Approved
    • Class lll Vapor Retarder at 1 inch (> 1.0 perm)
    • California Approved Insulation Registry T 1231


    EnergyShield CGF can be used as part of a WRB and potentially part of an air barrier assembly. In these types of assemblies it is required that all joints, penetrations, and openings be taped or sealed by other means. Atlas recommends flashing EnergyShield CGF into rough openings and other building transitions. The coated glass-mat facers are compatible with most flashing or sheathing tape, joint fillers, sealants, and adhesives. Consult the product manufacturer for specific compatibility.



    Warning TriangeWARNING: Cancer and Reproductive Harm -