Why the Skyscrapers of the Future Are Being Built With Wood

For over a century, the recipe for a skyscraper has remained largely unchanged: pour the concrete, forge the steel, and build toward the clouds. But in downtown Milwaukee, a new 31-story tower called the Neutral Edison is rising without the traditional heavy reliance on those carbon-intensive materials. When completed in 2026, it will become the tallest mass timber building in the world, reaching 362 feet into the sky.[1]

The Edison is not an anomaly; it is the vanguard of a quiet revolution in global architecture. Across North America, Europe, and Asia, developers are increasingly turning to mass timber—a category of engineered wood products designed to match or exceed the structural integrity of steel and concrete. This shift is driven by a combination of climate urgency, aesthetic preference, and recent breakthroughs in building codes.[6]

To understand the appeal of mass timber, one must first look at the environmental toll of traditional construction. The production of steel and concrete accounts for roughly 9 percent of global greenhouse gas emissions from energy use. Cement manufacturing alone requires heating limestone to extreme temperatures, a process that releases massive amounts of carbon dioxide into the atmosphere.[2]

Mass timber flips this equation. Trees naturally absorb carbon dioxide as they grow. When harvested and turned into structural panels, that carbon remains locked inside the wood for the lifetime of the building—often centuries. Studies indicate that substituting traditional materials with cross-laminated timber (CLT) can lower the carbon emissions of large buildings by roughly 40 percent.[2][4]

The most common form of mass timber is Cross-Laminated Timber, or CLT. It is manufactured by taking standard lumber boards, stacking them in alternating perpendicular layers, and bonding them together with structural adhesives under immense pressure. This cross-hatching technique gives the resulting panels extraordinary rigidity in both directions, allowing them to serve as load-bearing walls, floors, and elevator cores.[4][6]

Despite its strength, CLT is roughly five times lighter than concrete. This weight reduction means buildings require smaller, less expensive foundations. It also transforms the construction site itself. Because mass timber panels are prefabricated in factories using precise digital models, they arrive on-site ready to be slotted together like a massive piece of flat-pack furniture.[4]

This prefabrication drastically accelerates construction timelines. Builders report that mass timber projects can be completed up to 20 percent faster than traditional concrete builds. The sites are also noticeably quieter and require fewer workers, as the process involves assembling precision-cut pieces rather than pouring and curing concrete or welding steel beams in mid-air.[4][6]

The most persistent question surrounding wooden skyscrapers is inevitably about fire safety. It is a counterintuitive concept: building a high-rise out of combustible material. However, structural engineers point out that mass timber behaves very differently from the light-frame wood used in single-family homes.[3][5]

When exposed to intense heat, a thick mass timber beam does not easily ignite. Instead, the outer layer chars. This char layer acts as a natural insulator, protecting the structural integrity of the wood inside and slowing the spread of the fire. In contrast, steel beams can warp, buckle, and fail suddenly when exposed to extreme temperatures. In rigorous testing, CLT structures have withstood over 90 minutes of direct fire without collapsing.[3][5]

Regulatory bodies have taken notice of these safety tests. The International Building Code (IBC), which forms the basis for local regulations across the United States, recently underwent a historic update. The 2021 and 2024 editions introduced new "Type IV" construction categories specifically designed to accommodate tall mass timber structures.[3][5]

Under the new IBC guidelines, developers can build up to 18 stories (Type IV-A) if the timber is fully encapsulated in fire-resistant materials like gypsum board. For mid-rise buildings up to 12 stories (Type IV-B), the 2024 code allows for 100 percent of the timber ceilings to remain exposed, allowing architects to showcase the natural warmth and aesthetic appeal of the wood.[3][5]

While the momentum is undeniable, the mass timber movement still faces hurdles. The supply chain for engineered wood is still developing, and in many regions, the upfront material costs can be higher than concrete. Furthermore, the environmental benefits are entirely dependent on sustainable forestry practices; if the increased demand for timber leads to deforestation or the destruction of old-growth forests, the carbon math quickly falls apart.[2][4]

To mitigate this, industry leaders emphasize the need for strict certification, ensuring that for every tree harvested, new ones are planted to continue the cycle of carbon sequestration. When managed correctly, the forest acts as a renewable factory, continuously pulling carbon from the air and packaging it into building materials.[2][4][6]

Looking ahead, the ambitions for mass timber are only growing. While Milwaukee currently holds the crown, developers in Sydney, Australia, are planning hybrid timber towers that push even higher. In Japan, Sumitomo Forestry has proposed the W350 project—a 70-story, 350-meter-tall timber skyscraper envisioned for completion in 2041.[1][6]

Ultimately, the rise of mass timber represents a profound shift in how we view the built environment. Rather than treating buildings as inevitable sources of pollution, architects and engineers are proving that our cities can be constructed in partnership with nature, turning the skylines of tomorrow into vast, beautiful carbon sinks.[2][6]