Who KLH is and where they play
KLH Massivholz GmbH is an Austrian pioneer in cross‑laminated timber. Their focus is mass timber panels for structural walls, floors, and roofs across mid‑rise housing, education, hospitality, and office projects. Think of KLH as a specialist shop that does one thing very well: CLT.
What they sell, in practice
KLH’s offer centers on CLT panels in multiple thicknesses, layups, and surface grades, with CNC pre‑cutting and options like visual or industrial faces. That menu adds up to dozens of standard build‑ups and sizes, plus project‑specific variants. Hardware, connectors, and coatings are typically sourced rather than made in‑house, so their true manufactured product line is a single core category.
EPD coverage at a glance
KLH publishes a product‑specific EPD for KLH CLT through EPD International, which covers the CLT family rather than one narrow SKU. Program operators generally set five‑year validity for product EPDs, so teams should watch renewal windows to avoid last‑minute scrambles (EPD International, 2025). For day‑to‑day spec work, one current family EPD usually satisfies owner and AEC requirements when the project calls for product‑specific declarations.
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Where gaps may still exist
We did not find separate, publicly listed EPDs for assembled CLT systems from KLH such as cassette floor modules, acoustic composites, or panel‑plus‑finish packages. If a project submittal asks for an EPD tied to a specific assembly rather than base CLT, that can slow approvals or push teams toward a competitor with a directly comparable declaration. The fix is simple, either add an assembly EPD or include clear guidance in the CLT EPD on applicable thickness ranges and typical assemblies.
Competitors KLH meets most often
In European tenders, KLH is frequently compared with Stora Enso, HASSLACHER, and Binderholz. In North America, SmartLam and Structurlam show up on the same bid lists. Several of these peers maintain current CLT EPDs that are easy for specifiers to reference, including Stora Enso and HASSLACHER in Europe and SmartLam in the US (EPD International, 2025; IBU, 2025; SCS Global Services, 2025). Where a peer offers both base‑material and system‑level declarations, they can win on paperwork even when performance is similar.
Why this paperwork matters commercially
Many owners and GCs now require product‑specific EPDs for carbon accounting. Without one that matches the product being submitted, teams often have to model with conservative defaults that make materials look heavier on impact. That penalty nudges buyers toward products with verified data, which means CLT suppliers that publish clear, current EPDs avoid price‑only battles and stay in the spec more often.
Fast path to fuller coverage
Two pragmatic moves close most gaps. First, keep the CLT family EPD current and explicit about thickness ranges that are covered, so estimators do not need clarifications at bid time. Second, add one or two assembly EPDs for common applications such as floor slabs with acoustic layers or fire‑rated wall panels. A great LCA partner will map the competitive PCR choices, align with the operator your buyers prefer, and make data collection painless so engineering time stays on product work, not spreadsheets.
Bottom line for KLH watchers
KLH is a focused CLT specialist with a family EPD in place and a product range that fits many mid‑rise use cases. The clearest upside sits in packaging that EPD coverage for typical assemblies, which helps win on projects where like‑for‑like comparisons rule submittals. In a tight spec race, the team that removes one more RFI usually wins the day.
