DuPont Thermax EPD due December 2026

What’s expiring and when

DuPont has one Environmental Product Declaration scheduled to expire in December 2026. The record covers the Thermax family of polyisocyanurate board insulations often used as an interior finish or as part of wall systems. Today’s date is April 20, 2026, which puts the renewal window squarely in front of commercial bid season.

Is there already a replacement posted?

As of April 20, 2026 we did not find a newer, public EPD for Thermax on common operator portals or DuPont’s sustainability pages. DuPont does confirm its use of third‑party verified EPDs for building products and references UL SPOT in recent sustainability updates, but no fresh Thermax declaration is visible yet (DuPont Shelter Solutions, 2025). If a new document is in verification, getting it published before year‑end avoids avoidable substitution risk.

Helpful product pages for context: Thermax Sheathing and Thermax Heavy Duty.

What happens to specs if the EPD lapses

Many public and private projects now require product‑specific EPDs for insulation packages. When an EPD is missing, design teams must model impacts using less favorable defaults, which often nudges selection toward products with current, product‑specific declarations. That means slower bids, added compliance back‑and‑forth, and more value‑engineering away from the product with the gap.

For background on how insulation EPDs are used in North America, see our snapshots on EPDs for insulation in the United States and industry‑wide options for PIR boards here.

Are industry‑wide polyiso EPDs a safety net?

PIMA maintains industry‑wide EPDs for polyiso in North America. These are valuable for transparency and benchmarking, and they can support some programs, but on many specs they do not carry the same weight as a product‑specific EPD for crediting and carbon accounting (PIMA, 2026). Treat them as a back‑up, not a substitute.

Competitive options with current EPDs

If the Thermax declaration is not renewed on time, specifiers are likely to reach for these published alternatives in the same board‑insulation space:

• GAF EnergyGuard polyiso insulation family. Several product‑specific EPDs are current through 2029 to 2030 under NSF, including NH Tapered and NH Ultra Tapered variants (NSF, 2025) (PDF).
• Johns Manville AP and related continuous‑insulation boards. JM maintains a public EPD library for foam board and roofing systems that specifiers regularly reference during submittals. See the JM EPD library for polyiso CI and roofing boards here.
• Kingspan Therma TR29 and TT49 (PIR boards). For projects that accept EN 15804 EPDs, the IBU‑verified declaration is valid to July 10, 2028 and is easy to cite in specs (IBU, 2023) (PDF).

Renewal timing that protects revenue

Publishing an EPD is not only a verification task. The longest lead item is dependable data collection across plants, SKUs, and energy streams. Teams that start the renewal six months before expiry rarely need to chase down last‑minute approvals. Those that start late often find themselves answering substitution RFIs instead of winning scope. Set your internal calendar to kick off by late Q2 for a December 2026 deadline, keep a weekly owner for data requests, and confirm your preferred operator early so formatting is locked.

What to watch while the renewal is in flight

• Sales enablement: arm reps with the EPD file path and a one‑pager that clarifies modules, facility coverage, and versioning so submittals move fast.
• PCR alignment: if the category rule evolved since the last EPD, confirm modeling assumptions and cut‑offs early so verification questions do not stall publication.
• Portfolio hygiene: if the upcoming EPD is a family declaration, align SKUs and facers named in the scope to what is actually sold, so field teams are not tripped up by naming mismatches.

Where to find official materials

• DuPont product pages: Thermax Sheathing, Thermax Heavy Duty
• GAF EnergyGuard EPD example: NH Tapered Polyiso Insulation (NSF, 2025) (PDF)
• Johns Manville EPD library: Polyiso and roofing systems
• Kingspan Therma TR29/TT49 EPD (IBU, 2023) (PDF)

The move that keeps Thermax in more specs

Thermax is a well known, code‑friendly board that design teams understand. A smooth renewal removes friction during submittals and keeps competitors from framing the conversation around “who has the EPD today.” Start the data pull, confirm the PCR and operator path, and publish early so Q4 project teams recieve a current file without asking.

(Sources for numeric claims: PIMA press release on updated industry‑wide polyiso EPDs, 2026; NSF‑verified GAF EnergyGuard polyiso EPDs, 2025; IBU‑verified Kingspan Therma TR29/TT49 EPD, 2023.)