German construction firm PERI Group has revealed that it’s using 3D printing to renovate an existing building for the very first time. In what PERI describes as a “World’s first,” its engineers are deploying a COBOD 3D printer to add an entirely new floor to a family home in the Bavarian town of Lindau. Already, the companies’ engineers have removed the building’s old roof and laid down a concrete ceiling, providing the basis for a new 3D printed floor. “[By] mixing highly CO2-binding neptune grass insulation, a folding wooden roof and a 3D printed load-bearing structure, we have been able to construct the building extension in a nearly CO2-neutral way,” he added. In practise, PERI is constructing its extension using HeidelbergCement’s ‘i.tech 3D’ material, which is custom-made for 3D printing, along with COBOD’s BOD2 machine. Earlier this year, PERI finished using the BOD2 to 3D print a three-storey apartment building in Wallenhausen, Germany, which is now expected to be rented out on the domestic market there. In a similarly charitable project in Malawi, 14Trees has opted to leverage COBOD’s technology to build a 3D printed school, doing so inside 18 hours, before opening it to students.

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