Friday, November 7, 2025
The global push towards sustainable construction has found a powerful proof point in Bad St. Leonhard im Lavanttal, Austria. Stora Enso’s venerable mill in this region has officially surpassed a monumental threshold: one million m3 of Cross-Laminated Timber (CLT) production. This achievement, reached in October 2025, positions the facility as the first in Stora Enso’s network to reach this figure, underscoring the rapid industrialisation and maturity of mass timber as a viable alternative to conventional materials, such as concrete and steel.
The staggering volume of CLT produced—equivalent to the timber used in approximately 15,000 global projects—reflects more than just manufacturing capacity. It is a profound signal to the construction industry: engineered wood is no longer a niche product, but a cornerstone of low-carbon, urban development.
The Bad St. Leonhard mill, with roots tracing back to its founding in 1885, carries a significant legacy in the Austrian wood industry. Its transformation in 2008 marked a decisive pivot, making it the first Stora Enso site to commence CLT production. This early investment in engineered wood positioned the site at the vanguard of what is now a burgeoning global market.
The global CLT market is currently experiencing robust growth, fueled by stringent environmental regulations, corporate sustainability commitments, and advancements in building codes that now permit taller timber structures, particularly across Europe and North America. Market reports indicate the CLT sector is expanding rapidly, with an expected compound annual growth rate (CAGR) of over 11% through the end of the decade. The one-million cubic metre milestone is not just a company achievement; it’s an indicator of this larger, structural shift in construction material preference worldwide.
“Reaching one million cubic meters of CLT is not just about numbers,” stated Martin Nistelberger, Mill Director at Bad St. Leonhard. “It’s a story of continuous improvement, close collaboration, and the dedication of our entire team who have fundamentally re-engineered how we process wood for modern construction.”
Sustaining such high production figures—the mill’s maximum annual capacity hovers around 80,000 m3 —requires a delicate balance between volume, precision, and consistent quality. Over the past decade and a half, the mill’s operations have been systematically refined through continuous investments in technology and human capital.
Markus Baumgartner, CLT Production Manager at Stora Enso Wood Products, emphasised the strategic approach: “We’ve improved production step by step—by developing our people, upgrading equipment, and learning from experience. The strong link between production and sales has been key. It helps us understand customer needs and respond quickly with the right solutions, ensuring our highly prefabricated panels arrive just-in-time on site.”
This integration between the manufacturing floor and customer demands is critical in the mass timber sector, where digital design, precision cutting, and just-in-time logistics replace traditional, on-site heavy construction processes. This efficiency translates directly into faster assembly times, reduced construction waste, and lowered overall project costs for developers.
The vast quantity of CLT produced at the mill has shaped urban landscapes across the globe, especially in Europe. The largest single project supplied by the Austrian facility, the Arboretum in France, is a significant case study, utilizing approximately 20,000 m3 of the engineered wood. This demonstrates CLT’s capacity to deliver massive, complex structures while retaining a drastically reduced carbon footprint compared to concrete alternatives.
The versatility of the material extends far beyond typical residential and commercial structures. Christoph Koitz, Director of Building Solutions Supply Chain, shared an anecdote highlighting the material’s adaptability: “Once, we even used CLT to build components for a model submarine on display at an exhibition. So whenever someone asks what can be built from CLT, we like to say: from houses to submarines!”
This anecdote, while lighthearted, reinforces a key market advantage of CLT: its high strength-to-weight ratio, dimensional stability, and capacity for complex, customised fabrication.
Looking ahead, the team at Bad St. Leonhard is committed to maintaining its leadership position in the mass timber sector. The focus remains on continuous product development, targeted equipment upgrades, and optimising material use to enhance the environmental profile of the final product.
The significance of the one-million m3 milestone is far-reaching. It’s an emblem of the wood industry’s successful evolution into the bioeconomy, positioning wood as a crucial, renewable resource for decarbonizing the built environment. As cities continue to grow and climate-conscious construction becomes mandatory, the output from facilities like Bad St. Leonhard will be indispensable.
“This milestone shows what’s possible when people care about what they do,” Mill Director Nistelberger concluded. “We’re proud of what we’ve achieved here, and we’ll keep building on it—one cubic metre at a time, solidifying mass timber’s role in a sustainable future.”
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Tags: Bad St. Leonhard, CLT production milestone, cross-laminated timber, engineered wood, green building, mass timber construction
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