Thermafiber’s mineral wool portfolio and EPD coverage
Thermafiber sits inside Owens Corning’s insulation family and has a clear focus on stone wool. If your bids live or die on fire, acoustics, and envelope performance, the brand shows strong EPD coverage across its core lines, with a few places where product naming clarity can tighten specs faster.
Who Thermafiber is
Thermafiber is Owens Corning’s mineral wool brand for commercial, industrial, marine, and residential applications. Think curtain wall fire containment, exterior continuous insulation, interior partitions, and OEM uses where high temperature and sound control matter.
What they sell
The lineup spans boards, batts, and specialty formats. You will see product families such as FireSpan and safing for curtain walls, SAFB for partitions, UltraBatt for framed walls, plus industrial blankets, felts, and marine boards. Across densities, thicknesses, and facings, that translates into dozens of distinct SKUs.
EPD coverage at a glance
Coverage is broad for the mineral wool range. Current EPDs published under Owens Corning and Thermafiber names cover light and heavy density boards, batts, SAFB, FireSpan, Safing, UltraBatt, plus industrial and marine variants. Most of these Thermafiber EPDs share the same renewal window on October 1, 2026, so teams should calendar renewals well before that date to avoid spec friction. The naming inside several EPDs is generic to “mineral wool insulation” rather than a specific marketing name, which is normal and acceptable for many projects.
Where clarity can still help
Exterior continuous insulation boards used in rainscreen systems often appear under generic heavy density board EPDs. That works in many submittals, yet some owners prefer the brand family called out explicitly. If a specifiication asks for product-name alignment, map the SKU to the correct EPD early and add a short letter of applicability in the submittal package. Accessories like fasteners or adhesives fall outside Thermafiber’s scope and typically need their own documentation from other suppliers.
Competitive set on most projects
Thermafiber frequently faces ROCKWOOL on stone wool, along with Knauf Insulation and CertainTeed where fiberglass can substitute in interior partitions. On fire and façade applications, stone wool to stone wool is the usual swap, so ROCKWOOL is the day-to-day comparator. In interiors, fiberglass batts from Knauf or CertainTeed can appear as alternates when fire or temperature limits are less strict.
Are there notable gaps today
For mainstream Thermafiber families, gaps look small. The practical risk is not the absence of an EPD, it is mismatched naming between the marketing label and the EPD document the reviewer has in hand. Solve that with a clean SKU to EPD crosswalk and a one page narrative of scope and densities covered.
Why EPDs move the needle in bids
Many owners and design teams now require product specific EPDs to avoid using conservative default factors in carbon accounting. Lacking an EPD can push a product out of consideration when LEED v5 aligned policies are in play, since reviewers want verified declarations for tallying material impacts. Having a current EPD keeps the conversation on performance, price, and lead time rather than paperwork.
A quick approach to stay ahead
Pick the common PCR used by direct competitors, then build a multiproduct EPD that cleanly enumerates densities and facings. Align plants under one declaration if the PCR allows it, maintain a living SKU to EPD matrix, and set reminders six months before the 2026 renewal window. The right partner will handle the cross functional data pull and validation so your product managers and ops leaders can keep building.
Sustainability home base
Owens Corning publishes its sustainability strategy and targets in a dedicated section that is useful background for spec narratives and client Q&A. You can browse it here: Owens Corning Sustainability.
What to watch next
Track upcoming PCR updates for building envelope insulation and any program-operator changes that affect formatting. Keep an eye on owner specifications that ask for product-name alignment inside EPD PDFs. Most of Thermafiber’s core portfolio is already covered, so the win is speed and clarity in submittals, not chasing new declarations.
Frequently Asked Questions
Is Thermafiber narrowly focused or spread across many insulation types?
It is a focused mineral wool brand with products for curtain wall fire containment, exterior continuous insulation, interior partitions, and industrial or marine uses. That yields dozens of SKUs across densities and facings.
Does Thermafiber have EPDs for its main product families?
Yes. Current EPDs cover boards and batts including SAFB, FireSpan, Safing, UltraBatt, and multiple industrial and marine formats. Many share the same renewal timing in late 2026.
What creates submission friction if EPDs exist?
Brand naming in EPDs may be generic, so reviewers need a simple crosswalk from SKU names to the EPD scope. Add a brief applicability letter to speed approvals.
Who are Thermafiber’s primary competitors on specs?
ROCKWOOL for stone wool is the main head to head. In interior partitions, fiberglass alternatives from Knauf Insulation or CertainTeed sometimes compete when fire or temperature limits are less strict.
What should the team do before the 2026 renewal window?
Confirm plant coverage, refresh utility and production data, align SKUs to the next EPD version, and schedule verification early to avoid lapses during peak bid cycles.
About the Author
Eric works at the intersection of sustainability, regulation, and business strategy, helping manufacturers navigate the evolving landscape of EPDs and LCAs. Having spoken with hundreds of teams across North America, brings a deep understanding of what drives ROI, what regulators are asking for, and how companies can stay ahead with smart, scalable approaches to environmental reporting.
