New high-rise TRÆ completed in Aarhus, Denmark showcases sustainable construction techniques

A new high-rise building has been completed in the South Harbor of Aarhus, standing at 78 meters tall. The building, notably named TRÆ (Danish for “Wood”), is distinguished by its use of wood and recycled materials as its primary construction elements, making it the tallest building in Denmark constructed with wood as the load-bearing material.

The structure showcases wooden features and recycled components right from its exterior, where repurposed wind turbine blades serve as sun shades. The facade gleams with aluminum panels initially intended for mailboxes but discarded due to water damage. Inside, large laminated wooden columns extend from the ground to the top of the building.

According to the project manager, the ambition is to minimize carbon emissions by opting for eco-friendly materials. The goal is to reduce the use of carbon-heavy materials and incorporate discarded items that still have potential utility. Various themes of sustainability are explored through three different floors, including biogenic materials such as processed eelgrass fibers and ‘Hempcrete’ made from hemp plants.

Additionally, one floor focuses on upcycling, featuring ceilings crafted from paper granulate, while another emphasizes recycling, reusing flooring from a different building in Aarhus. The innovative techniques, while challenging, are viewed positively by builders, who acknowledge the importance of sustainability in future construction.

PFA Pension, the company behind the project, claims that the use of these materials has led to a 75% reduction in carbon emissions compared to traditional construction methods. However, experts remind us that the environmental impact of new construction remains significant, urging a rethinking of building practices to foster sustainability on a global scale.