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Styrofoam™ Brand XPS Insulation

Exceptional long-term performance.

Low-GWP. Low embodied carbon.

Since its invention in 1941, Styrofoam™ Brand extruded polystyrene (XPS) has built a rich, storied heritage as an innovative, sustainable building product – creating an entire insulation material category. Its unique closed-cell structure and rigid foam board technology enables XPS to meet core thermal, moisture, air and vapor performance requirements.

The history of innovation continued in 2019, when DuPont began the process of reformulating Styrofoam™ Brand XPS Insulation to offer a low global warming potential (GWP) version. The transition was completed at the end of 2023. All sites in North America manufacturing Styrofoam™ Brand XPS Insulation now produce a low-GWP formulation signified by a new grey color.

Low-GWP Styrofoam™ Brand XPS Insulation delivers
a 94% reduction in embodied carbon, meets all HFC
regulations and building codes and continues to offer:

The same long-term value (and R-value)

Durability

Ease of handling

Exceptional thermal and moisture performance

Transparency. Performance. Quality.

We are committed to transparency in our reporting and quality at every level. Our
products have been evaluated by third parties with certifications that meet or exceed
standards for both sustainability and performance.

Published EPD and Embodied Carbon/LCA Optimization Assessment, demonstrating low-GWP Styrofoam™ Brand XPS has achieved a 94% reduction in embodied carbon relative to the previous formulation

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20% pre-consumer recycled content on average as certified by UL Environment

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GreenCircle certified

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All Styrofoam™ Brand products are produced using 100% renewable electricity¹

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¹ We have purchased Renewable Energy Credits to offset our electricity usage since 2016

More than meets the eye

EPS foam allows the intrusion of water over time.1 The closed-cell structure Styrofoam™ Brand XPS Insulation is the design choice for buildings that withstand the elements and the test of time.

Moisture
XPS structure absorbs significantly less water than EPS products

R-Value
XPS maintains R-value better than EPS when water is present1

Durability
Absorbed water can cause damage in freeze/thaw conditions

1 Billy Connor, April 2019. “Comparison of Polystyrene Expanded and Extruded Foam Insulation in Roadway and Airport Embankments”. Alaska University Transportation Center, University of Alaska Fairbanks, (INE/AUTC 19.08). https://aidc.uaf.edu/projects/2019/comparison-of-polystyrene-expanded-and-extruded-foam-insulation-in-roadway-and-airport-embankments/

Featured Styrofoam™ Brand XPS Products

DuPont™ Styrofoam™ Brand Cavitymate™ Ultra XPS Insulation

DuPont™ Styrofoam™ Brand Cavitymate™ Ultra Extruded Polystyrene (XPS) Insulation is a moisture-resistant, durable and lightweight extruded polystyrene foam board specifically designed for use in wet cavity wall environments. Manufactured with a patented carbon black technology,

Styrofoam™ Brand Cavitymate™ Ultra XPS Insulation features an R-value of 5.6 per inch (RSI of 0.97 per 25 mm). Its closed cell structure provides advanced long-term thermal performance and moisture control.

DuPont™ Styrofoam™ Brand Cavitymate™ Ultra XPS Insulation

DuPont™ Styrofoam™ Brand Plazamate™ XR XPS Insulation

DuPont™ Styrofoam™ Brand Plazamate™ XR Extruded Polystyrene (XPS) Insulation is next generation in evolution of high-performance closed cell insulation that allows extra design flexibility for architects and engineers by optimizing roof thickness – reducing expensive commercial roof building alterations required for meeting the latest building and energy codes – and assists in reducing overall project costs. Styrofoam™ Brand Plazamate™ XR XPS Insulation is reusable, moisture-resistant, durable, easy to work with and offers more R-value per inch.

Styrofoam™ Brand Plazamate™ XR XPS Insulation , with a compressive strength of 60 psi (415 kPa), stands out for its strong moisture resistance and R-value retention. It's designed to resist compressive creep and fatigue, ensuring long-term structural integrity and thermal performance. This insulation is ideal for wet and exposed applications, including plaza decks and roof insulation.

DuPont™ Styrofoam™ Brand Plazamate™ XR XPS Insulation

Styrofoam™ Brand Highload 40

DuPont™ Styrofoam™ Brand Highload Extruded Polystyrene Insulation is a closed-cell foam insulation designed for use in heavyweight infrastructure and low-temperature applications where compressive strength and moisture resistance are crucial. The Styrofoam™ Brand XPS product line gives you the proven thermal and moisture performance of the original XPS, plus the product options you need to design and build energy-efficient, resilient structures all the way to the top. It’s lightweight and easy to install, which makes the work go faster, and it’s readily available through our wide distributor network. When and where you need it, Styrofoam™ Brand is there.

Styrofoam™ Brand Highload 40

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For more details on all the Styrofoam Products, click on the the link.

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DuPont™ Styrofoam™ Brand Residential Sheathing XPS Insulation

DuPont™ Styrofoam™ Brand Residential Sheathing Extruded Polystyrene (XPS) Insulation is inherently resistant to moisture and is lightweight, making it easy to handle. Its thin plastic film coating enables it to withstand abuse during handling and around the job site.

Styrofoam™ Brand Residential Sheathing XPS Insulation is designed for use when a 15 psi compressive strength (ASTM C578 Type X) product is needed.

DuPont™ Styrofoam™ Brand Residential Sheathing XPS Insulation

DuPont™ Styrofoam™ Brand Roofmate™ XPS Insulation

DuPont™ Styrofoam™ Brand Roofmate™ Extruded Polystyrene (XPS) Insulation is designed for installation above waterproofing or roofing membranes in protected membrane roof (PMR) or green roof applications and is easy to fabricate into various sizes and shapes to meet specific design needs.

Engineered for use on heavyweight decks (e.g. reinforced concrete) with a ballast layer of gravel or concrete slabs, Styrofoam™ Brand Roofmate™ XPS Insulation helps the roof membrane maintain a steady temperature, minimizing the harmful effects of freeze-thaw cycles, weathering and physical damage during and after construction.

DuPont™ Styrofoam™ Brand Roofmate™ XPS Insulation

DuPont™ Styrofoam™ Brand Scoreboard XPS Insulation

DuPont™ Styrofoam™ Brand Scoreboard Extruded Polystyrene (XPS) Insulation is a grey, extruded polystyrene foam insulation board that is scored longitudinally on 16” and 24” centers, making it easy to size to commonly used widths, cut and install. It has excellent insulating characteristics, high resistance to water and water vapor, exceptional compressive strength and long-term durability.

Styrofoam™ Brand Scoreboard XPS Insulation is designed for use in exterior cavity wall and foundation applications. Like all Styrofoam™ Brand Extruded Polystyrene products, Styrofoam™ Brand Scoreboard resists moisture to deliver a stable R-value over the long term.

Styrofoam™ Brand Scoreboard XPS Insulation is classified as a Type IV product when tested in accordance with ASTM C578 and provides a long term insulating performance of R-5 per inch.

DuPont™ Styrofoam™ Brand Scoreboard XPS Insulation

DuPont™ Styrofoam™ Brand SM30 XPS Insulation

DuPont™ Styrofoam™ Brand SM30 Extruded Polystyrene (XPS) Insulation is a versatile, multipurpose extruded polystyrene board that fits the needs of the commercial and residential foundation and slab market.

Styrofoam™ Brand SM30 XPS Insulation's closed-cell structure resists water absorption, enabling it to retain a high thermal resistance value over time - a necessary property in below-grade residential foundation applications. It helps to protect foundation damp-proofing and waterproofing, especially during backfilling. It also provides a secondary barrier against groundwater leakage.

With Styrofoam™ Brand SM30 XPS Insulation, the freeze-thaw cycling of the foundation wall is minimized, reducing the possibility of cracking. A warmer foundation wall helps reduce the potential for condensation and adds to the thermal mass of the building.

DuPont™ Styrofoam™ Brand SM30 XPS Insulation

Go beyond compliance

We’re going further than ensuring environmental compliance; we’re continuing to advance our 2030 Sustainability Goals and invest in global efforts and technology innovations to help you design and build energy-efficient, resilient and durable structures in this rapidly changing world.

Already manufactured with 100% renewable electricity and a zero-ozone-depletion formula, additional sustainability benefits of Styrofoam™ Brand XPS Insulation include:

• Low GWP
• 94% reduction in embodied carbon
• Provides 200% cost, or equivalent to two products, for the LEED v4.1 LCA Optimization credit
• Published EPD through UL Environment
• 20% pre-consumer recycled content on average as certified by UL Environment
• GreenCircle Certified
• Reusability in many applications
• Low-VOC compliance (California Title 24 standard)
• Manufactured with BLUEDGE™ Polymeric Flame-Retardant sustainable technology • Contributes to DuPont’s 2030 GHG emissions reduction goal

Any questions?

The Styrofoam™ Brand was the original XPS, creating the product segment. Rooted in 80+ years of technical innovation, we’re excited to deliver a low-GWP solution. Let’s start a conversation about your next project.

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Resources

Styrofoam™ Brand XPS Compliance Letter

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U.S. AIM Act & Sell-through of Styrofoam™ Brand XPS Foam Insulation (2025)

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Low GWP Grey Styrofoam™ Brand XPS EPD

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Canadian (English) ➞

Canadian (French) ➞

Physical Property Equivalency Letter

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Customer Processing and Transport Safe Handling

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Safe Processing & Handling Graphic

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Styrofoam™ Brand Product Brochure

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Timeline

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Solar Exposure Technical Bulletin

Low GWP – Canada (English) PDF ↓

Images

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Press Releases

September 9, 2024
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November 30, 2023
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June 8, 2023
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June 6, 2023
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July 26, 2021
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February 23, 2021
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August 13, 2020
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July 16, 2020
English press release →
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All Six Sides Brochures

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Styrofoam™️ Brand Low GWP XPS LEED Optimization Document - Embodied Carbon Assessment

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