What’s expiring in December 2026
Based on our review of public EPD records, these Knauf Insulation declarations carry December 2026 validity dates:
- Sprayed insulation: CLT C1 Thermal, CLT C2 Thermal, CLT C1 Thermal Grey and CLT Thermal (valid until 2026‑12‑10).
- Sprayed insulation: SmartRoof Base (valid until 2026‑12‑14).
- Blanket insulation: TP 435 B, TP435 B, TPM 135, TP 430 KD, TPKD 430, FCB 035 and Earthwool slabs unfaced (valid until 2026‑12‑08).
In addition, eight more current EPD records tied to the same mineral wool families and plant variants also point to December 2026 expiry windows. Together, these sum to the 11 at issue for 2026‑12.
See Knauf Insulation’s EPD hubs for context and related SKUs: global listings and background, plus North America’s certification index that routes to program‑operator pages (Knauf Insulation, global, Knauf Insulation North America).
Replacements already in market (and where gaps remain)
- SmartRoof Base has a refreshed declaration under the SmartRoof Base 2 family running through August 2028 (EPD International, 2023).
- Several TP and façade slab lines show 2023 updates with validity to late 2028, including faced variants like TP 432 B and TP KD 432, which indicates the broader product platform is being maintained even if some unfaced sets end in 2026 (EPD International, 2023).
- For the CLT Thermal group, we did not find a like‑for‑like replacement posted as of April 20, 2026. If that changes, specifiers will usually accept a new declaration that documents the same functional unit and system boundary under the current Part A and relevant Part B.
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Will specifiers lose access to EPD data
If any of the December items lapse without a successor, teams working to LEED v5 or owner policies that ask for current, third‑party verified EPDs will have to either switch to a covered SKU in the same family or select an alternative with a live document. That swap can happen fast on projects with tight material carbon accounting.
Likely alternatives if replacements aren’t live
- Stone wool insulation with current UL‑verified EPDs from ROCKWOOL North America. Their product transparency hub centralizes the active declarations that U.S. reviewers commonly accept (ROCKWOOL Product Transparency).
- Fiberglass batt, board, duct liner and wrap families from Owens Corning with program‑operator EPDs updated in 2024 across multiple lines, per the company’s annual transparency report (Owens Corning Sustainability Report, 2025) (Owens Corning, 2025).
- Fiberglass portfolios from Johns Manville that list active declarations for boards, batts and mechanical applications, helpful when a mineral wool spec can accept fiberglass equivalents (Johns Manville EPD library).
For a deeper sense of the U.S. insulation EPD field and which operators dominate by category, these primers help: EPDs for Insulation in the United States and Blanket Insulation EPDs in the U.S..
Why timing matters commercially
Most product EPDs are valid for five years. December 2026 expiries mean data collection and third‑party review should already be underway. A fresh EPD keeps submittals simple and avoids carbon accounting penalties that come from fallback database values. Teams are often suprised how often a bid hinges on a PDF date stamp.
Practical renewal cues for manufacturers
- Map SKUs to declarations so product management sees which revenue lines go dark if a document lapses.
- Start the data pull early. Year‑over‑year utility and scrap improvements can lift results, but only if metering and procurement can furnish verifiable records on schedule.
- Pick the program operator and Part B most common in the competitive set for the same category. That shortcut improves comparability for reviewers and reduces rework (EPD International c‑PCR Thermal Insulation, 2025).
The bottom line for specifiers and bidders
For December 2026, the risk centers on sprayed mineral wool systems and selected blanket slab families. Some replacements are already posted, others are not yet visible. If a needed SKU lacks a current EPD, the path of least resistance on EPD‑required projects will be an alternative with a live, product‑specific declaration. Keeping renewals on time protects margin, shortens review cycles, and leaves less to chance in late‑stage value engineering.
