A ‘Wall of Wind’ Up to 150 mph Puts Manufactured Home Standards to the Test

It was a house like any other. A gray, single-section prefab, secured to single-stack masonry blocks with steel straps and anchor ties. It could have been someone’s starter home, downsized home, or best shot at owning a place of their own.

Then, scientists turned their fans up to 150 mph.

The test, conducted by researchers from Florida International University, the University of Kansas, and the University of Alabama, was designed to answer a question with huge stakes for the future of affordable housing: Can today’s manufactured homes withstand the kind of hurricane- and tornado-force winds that are becoming a growing threat across the U.S.?

“This has been done for the first time probably, at least in the U.S. and probably in the world, putting a manufactured home, with the proper installation practices in the field, and testing at hurricane-level wind speeds," Arindam Chowdhury, professor and co-director of the facility where the test took place, told FIU News. "Our facility is the only one that can do these kinds of things under an academic setting."

And that academic rigor could determine whether one of the country’s most affordable forms of housing is ready for a future of stronger storms—or whether the standards meant to protect those homes need to change.

The ‘Wall of Wind'

Manufactured homes have improved significantly since federal construction and safety standards were first adopted in 1976. But as these homes become a more important part of the affordable housing supply—and as extreme weather risks intensify—researchers are asking whether current standards are enough.

Already, wind is a growing concern for all types of real estate, with an estimated 18.3% of homes in the United States (nearly $8 trillion in value) at risk of severe or extreme hurricane wind damage.

Manufactured homes are considered especially vulnerable to high-wind damage because they are generally lighter than site-built homes, and many rely on gravity support systems rather than continuous permanent foundations. That can make it easier for wind to penetrate, shift, or lift these units.

An estimated 22 million Americans are living in manufactured homes across the country, with a significant portion of them concentrated in hurricane- and tornado-prone areas like the Southeast. And while a recent slew of storms provides ample examples of how these homes fare in extreme weather, field damage alone does not offer the granular detail needed to set exact thresholds for new standards.

"In the field, we can only see the destruction. After the destruction, we don't know how it happens," Chowdhury explained. "Here we are doing it in a much more controlled environment, so we can test various configurations, various installation practices, and then test it at particular wind speeds." 

That’s where FIU’s “Wall of Wind,” or WOW, comes in. Powered by 12 fans producing a combined 8,400 horsepower, the facility is the only one in the country capable of generating winds strong enough to match those of a major hurricane.

Hurricanes are classified in part by sustained wind speed. A Category 1 hurricane begins at 74 mph, while a Category 3 hurricane—considered a major storm—brings winds of 111 to 129 mph. Category 5 storms reach 157 mph or higher. WOW maxes out around that 157 threshold.

What the early tests showed

Part of what researchers are hoping to understand from this round of experiments is how local regulations may need more rigorous standards for these homes. To unpack those differences, they tested their prefab unit across a variety of storm settings and local regulations.

First, researchers tested Florida’s standard, blasting a unit with 130 mph winds and then 150 mph winds. By the second test, many of the single-stack, gravity-supporting masonry piers had blown out, along with several windows, according to the Miami Herald, which was present for the test.

Then, researchers tested how the same home might perform under conditions more common in Kansas. To replicate local requirements, they removed roughly 40% of the home’s anchors and ran the fans at 110 mph, then 130 mph.

This time, the home broke free from its anchors entirely, completing two full somersaults.

While researchers will need months to analyze the data before they can make specific recommendations, the difference in performance between the Kansas and Florida standards already proved the larger point: The same home can have vastly different outcomes depending on the requirements it is built and anchored to meet.

What comes next

Researchers aren't stopping at wind, and they hope to add more extreme weather conditions to future tests.

"If this home was tested under flooding and wind and storm surge, it might have failed earlier," Chowdhury said. "We will be able to test these under much more realistic conditions to create solutions for resilience." 

That next phase may be where the research becomes even more consequential. Extreme storms rarely happen in isolation—they bring wind, water, saturated ground, flying debris, and shifting foundations to bear on a home all at once.

If researchers can pressure-test how those forces combine to push a manufactured home past its limits, they may be able to offer clearer guidance on how to make this type of housing safer in the storms homeowners are increasingly likely to face.

Those recommendations could shape not only how manufactured homes are built and anchored, but how safely they can serve the millions of Americans who already rely on them—and the many more who may turn to them as traditional homeownership moves further out of reach.