In recent years there has been a real surge of conversations around timber and its adoption has seemingly spread quickly, across many architectural projects. For example, Kengo Kuma’s KKA has recently completed an all-wooden classroom for the Okayama University as well as a temporary cross-laminated pavillion park in Tokyo. Then there is C6, the world’s tallest wooden skyscraper set to be built in Perth, Australia, and designed by Fraser and Partners.
And it’s not by chance. When compared toe to toe with other structural materials, timber has many advantages. As we highlighted in a previous article, timber is relatively affordable, it can bear loads thanks to its great cross-sectional strength, and has excellent acoustic and insulative properties. It can be used for both internal and external applications with minimal differences in treatments and, especially indoor, it can often be left untreated. Not the least, timber can be, on its own, the aesthetic focus of a building, acting both as a structural as well as decor component.
Moreover, timber, as many other biomaterials, acts as a carbon sink. This means that while growing the tree captures CO2 from the atmosphere (around 50 pounds/year) and will keep it sequestered for its entire lifecycle until it will eventually be disposed of. In other words, using timber as a construction material not only can add flexibility to the project but it’s also a choice that makes sense from an environmental perspective. Or does it?
Based on what we’ve said so far, employing timber as the primary construction material should be a no-brainer for every architect, civil engineer, or contractor even remotely aware of the climate crisis looming on the horizon. And yet, as with most choices, it’s not so simple. Before fully committing to all-timber buildings we need to consider a few things.