3D printed homes vary by their printing materials, methods, and overall design, encompassing everything from concrete and plastic to bio-based and recycled components, with some printed on-site using large robotic arms and others manufactured as pre-fabricated modules. Key distinctions include the use of materials like soil, wood residuals, or recycled plastics, as well as the construction approach, which can involve on-demand, on-site printing or the creation of prefabricated sections for later assembly.
3D printed homes are classified by the primary materials used in their construction:
Concrete and Mortar:
The most common material, offering high strength and durability, is used to build walls and other structures on-site.
Bio-based Materials:
Projects like the BioHome3D use wood residuals and bio-resin, creating a fully recyclable and eco-friendly structure.
Plastic and Recycled Plastics:
Some micro-homes and modules are printed using sustainable bioplastics or recycled materials.
Soil-Based Materials:
The Gaia house in Italy features walls printed with a mixture primarily of soil, showcasing another sustainable option.
Composite Materials:
Companies like Mighty Buildings® use proprietary “Light Stone,” a composite that cures into a stone-like material for pre-fabricated walls.
By Construction Method
The way 3D printed homes are built defines them as:
On-site Printing:
Large, industrial 3D printers move along tracks on a construction site, extruding material layer by layer to build the home’s walls directly in place.
Modular Prefabrication:
Companies print sections or entire rooms in a factory, which are then transported to the building site and assembled into a complete home.
Hybrid Approaches:
Some projects combine methods, such as printing concrete foundations on-site while fabricating the upper modules in a factory.
Examples by Notable Project
BioHome3D:
The first 3D-printed, 100% bio-based home in the world, printed from wood residuals and bio-resin.
Mighty Buildings®:
Focuses on pre-fabricated, modular homes and Accessory Dwelling Units (ADUs) built with proprietary robots and partially recycled materials.
The WASP Project’s Gaia:
A small house in Italy where the walls were 3D printed from a soil-based mix.
SQ4D’s Homes:
These homes are notable for being among the first 3D printed houses in the United States that are for sale.