Construction 3D printing uses a large robotic arm or gantry to lay down concrete or similar material layer by layer, forming walls and structures directly from a digital design. The approach has moved from demonstrations into real small buildings and components.
Potential benefits include less waste, faster shaping of complex forms and lower labour for repetitive pours. The technology suits certain structures better than others, must meet strict building codes, and still needs people for finishing, plumbing and wiring, so it complements rather than replaces traditional methods, offering a new tool for parts of the building process.