Styrofoam™ Brand Extruded Polystyrene (XPS) Foam Insulation GWP & HFC compliance

 
 
 

Our low GWP formulation features a new grey color and the same great performance.

 
 
 

As of November 2023, all Styrofoam™ Brand extruded polystyrene insulation (XPS) is produced as low-GWP, grey XPS.  Some heritage blue Styrofoam™ XPS may be still available in U.S. states where they are compliant for sale. We tested and refined all our products to ensure that Styrofoam Brand XPS will continue to meet or exceed codes and regulations and can deliver the performance you’ve come to expect – in a color that meets modern design aesthetics.

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Frequently Asked Questions


 
 
 
 
 
 

Published EPDs and Embodied Carbon

DuPont’s Styrofoam™ Brand Insulation GWP Phase-Down program offers lower embodied carbon product solutions compliant with specific US HFC and Canada GWP Regulations without compromising on performance.
Remember: Embodied carbon should only be reported by manufacturers using third-party verified EPDs, and comparison of EPDs should be interpreted with caution due to complexity in modeling product life cycles and the lack of quantified uncertainty in reported values. Many factors, including embodied carbon and other sustainability considerations, should be used to guide product decisions.

USA Published Environmental Product Declarations (EPDs) for selected XPS products available in regulated U.S. states

Styrofoam™ Brand
ST-100
Owens Corning
Foamular® NGX™
Kingspan
GreenGuard® LG
EPD Available? Yes Yes Yes
Embodied carbon
(A1-C4) kgCO2e/m2RSI
6.2 9.8 4.5
Embodied carbon
(A1-C4) kgCO2e/bdft*
0.5 0.8 0.4
Leed Optimization Credit Eligible? Yes, 2 (max possible+) Yes, 1.5 (max possible) No

Canada Published Environmental Product Declarations (EPDs) for selected XPS products available in Canada

Styrofoam™ Brand XPS Owens Corning
Foamular® NGX™
SOPREMA®
Sopra-XPS
EPD Available? Yes Yes Yes 
Embodied carbon
(A1-C4) kgCO2e/m2RSI
6.2 9.8 2.1
Embodied carbon
(A1-C4) kgCO2e/bdft*
0.5 0.8 0.2
Leed Optimization Credit Eligible? Yes, 2 (max possible+) Yes, 1.5 (max possible) No

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*To convert kgCO2e/m2RSI to kgCO2e/bdft, divide by 12.24. The 12.24 factor was calculated by the following equations:
1m2RSI = 1m2 * 1.14 inch = 1.02 ft3 (where 1m2 = 10.76 ft2 and 1.14 in = 0.095 ft)
1bdft = 1ft2*in = 1ft2*(1/12 ft) = 0.0833 ft3
1.02/0.0833 = 12.24 m2RSI / bdft

Code Approval Documentation

  • Newly formulated Styrofoam™ Brand insulation foam produced for HFC regulated U.S. states is grey in color and approved for building applications as described in new ICC-ESR 4755
  • Canadian Styrofoam™ products are listed under the same CCMC Listings as previous: CCMC 11420-L12085-L and 04888-L.
 
 
 
 
 
 
 
 
 

A unique closed-cell structure gives Styrofoam™ Brand XPS its exceptional moisture resistance and enables it to retain a high, long-term R-value of R-5 per inch – even after exposure to standing water, wet soil and other damp conditions. Additional performance attributes of Styrofoam™ Brand XPS include:

  • Meets ASTM C578 Types and CAN/ULC-S701.1 (refer to specific product information for details)
  • Compliant with IRC, IBC and IECC as listed in ICC Evaluated Service Reports
  • Provides a weather-resistant barrier to enhance the building's resistance to air and moisture penetration
  • Meets building code requirements of ASTM E84 Flame Spread Index of 25 or less and a Smoke Developed Rating of 450 or less
  • Will not corrode, rot or support mold growth
  • Available in wide range of compressive strengths from 15 to 100 psi, and minimum flexural strength of 40 psi
  • Is easy to fabricate into various sizes, thicknesses and edge treatments to meet specific design needs, while ensuring energy efficiency and minimizing on-site cutting and waste

DuPont™ Styrofoam™ Brand XPS products are backed by the expertise of building science leaders dedicated to your success and warranties from a name you trust, including limited thermal warranties from 15 to 50 years including the Wall² system warranties and other system warranties.

Aesthetics

Grey, low GWP Styrofoam™ Brand XPS Insulation addresses the modern need for a dark reveal behind open-joint rainscreen systems or other applications where exposed insulation is desired. But that's not all. As a highly efficient continuous insulation, Styrofoam™ Brand XPS helps prevent thermal bridging which may lead to unsightly dark stains visible through cladding.

DuPont Performance Building Solutions is committed to being in step with where the construction industry is going. Our robust portfolio of proven and compatible products brings together decades of technology, expertise and innovation to provide water, air and thermal protection for all six sides of your building envelope.

 
 
 

Resources

 
 
 
 
 
 

Timeline

 
 
 
 
 
 
 
 
 
When you're protecting all six sides of the building envelope, the Styrofoam™ Brand product family has long been the choice for solid performance.  Learn More   Learn more
 
 
 
 
 
 


1 Calculated from life cycle analysis from published Styrofoam™ Brand Environmental Product Declaration Report.
2We have purchased Renewable Energy Credits to offset our electricity usage since 2016

DuPont believes this information to be reliable. It may be subject to change as additional knowledge and experience are gained. It is not intended as a substitute for any testing you may conduct to determine for yourself the suitability of our products for your particular purpose. Since conditions for use are outside the DuPont’s control, DUPONT DE NEMOURS, INC. OR ITS AFFILIATES MAKE NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND ASSUMES NO LIABILITY IN CONNECTION WITH ANY USE OF THIS INFORMATION. This information is not intended as a license to operate under or a recommendation to infringe any trademark, patent or technical information of DuPont or other persons covering any material or its use. ©2024 DuPont. All rights reserved. DuPont™, the DuPont Oval Logo, and all trademarks and service marks denoted with ™, ℠ or ® are owned by affiliates of DuPont de Nemours, Inc. unless otherwise noted.