Under Construction

Watching a robotic arm pour layers of concrete might sound boring. But videos of this process, known as 3D printing, are popular on social media. They give people a glimpse of a world in which affordable 3D-printed houses are normal.

Aiman Hussein has been posting the videos. He’s director of printing technologies at Alquist 3D. Hussein’s most-watched posts show the company’s printers layering row after row of concrete. This is done to build up a house’s outer walls. (See “Homes in Hours.”)

NOW WATCH THIS Videos of 3D-printed home-building are popular on social media. They get people excited about the process.

Hussein started making videos to document the company’s work. But he soon realized something. They were resonating × resonate to mean something; to cause an emotional response (verb) The boy's story resonated with his friend, who'd had a similar experience. with people. Watching them is “satisfying,” he says.

Welcome Home

The idea of 3D-printed houses has been gaining popularity. Realtor.com published a survey in 2021. It found that 66% of consumers would live in a 3D-printed home.

LAYER BY LAYER An Alquist 3D printer pours concrete layers to construct a wall.

In December 2021, a Virginia family moved into one of these houses. Alquist had built it for Habitat for Humanity. “Working with Habitat for Humanity was a fantastic experience,” Hussein says. “It really showed how we can [get] people into homes they can afford.”

MOVE IN Alquist founder Zachary Mannheimer (left) poses with people in front of their new 3D-printed home.

Zachary Mannheimer is Alquist’s founder. He’s also its CEO. He says 3D-printed homes cost less than homes made with wood. “Since the [Habitat for Humanity] home was completed and the first story about it came out,” he said last spring, “we’ve been averaging anywhere between 25 and 50 requests for 3D-printed homes per hour. . . . The need is huge.”

A BETTER WAY? Home-building is expensive. Alquist says 3D printing lowers costs. This can make homes more affordable.

Growing Pains

According to Mannheimer, there’s a big challenge facing the 3D-printed housing industry. The problem is scale × scale the size or extent of something (noun) Joanne was impressed by the scale of the plan. . “At the moment, [there are fewer] than 10 companies using this technology in America,” he said. “To really make a dent in the affordable-housing crisis, we’d need more like 50.”

Ryan Smith is director of the School of Architecture at the University of Arizona. He agrees that 3D printing could transform the construction industry. But he warns that American processes for home-building are set up to handle wood, not concrete. “If you change the means and methods of construction,” Smith says, “you would have to develop a whole workforce around that.”

Affordable 3D-printed homes aren’t going mainstream anytime soon. But getting people interested may be the first step. Hussein’s videos “unlock your imagination,” Mannheimer says. “We can excite a whole new generation about building things with computers and machines.”

Homes in Hours

Alquist’s machines are a lot like small 3D printers. But they are much bigger. Like all 3D printers, Alquist’s have dispensers. They pump out layers of material—in this case, concrete—one on top of another. The machines follow a layout. It comes from a digital file. The process can be used to create anything from jewelry to furniture to the walls of a house. The outer part of a house can be built in about 20 to 30 hours.