{"id":15093,"date":"2025-07-03T22:00:00","date_gmt":"2025-07-03T22:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=15093"},"modified":"2025-06-25T02:38:19","modified_gmt":"2025-06-25T02:38:19","slug":"affordable-resilient-precast-concrete-homes-vs-wood-july-2025","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/affordable-resilient-precast-concrete-homes-vs-wood-july-2025\/","title":{"rendered":"To spur the construction of affordable, resilient homes, the future is\u00a0concrete"},"content":{"rendered":"\n\n
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\n A modular, precast system of concrete \u2018rings\u2019 can be connected in different ways to build a range of models of energy-efficient homes.\n Pablo Moyano Fern\u00e1ndez<\/span>, CC BY-SA<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n Pablo Moyano Fern\u00e1ndez<\/a>, Washington University in St. Louis<\/a><\/em><\/span>\n\n

Wood is, by far, the most common material<\/a> used in the U.S. for single-family home construction. <\/p>\n\n

But wood construction isn\u2019t engineered for long-term durability, and it often underperforms<\/a>, particularly in the face of increasingly common extreme weather events<\/a>.<\/p>\n\n

In response to these challenges, I believe mass-produced concrete homes can offer affordable, resilient housing in the U.S. By leveraging the latest innovations of the precast concrete industry, this type of homebuilding can meet the needs of a changing world.<\/p>\n\n

Wood\u2019s rise to power<\/h2>\n\n

Over 90% of the new homes built in the U.S.<\/a> rely on wood framing.<\/p>\n\n

Wood has deep historical roots as a building material in the U.S., dating back to the earliest European settlers who constructed shelters using the abundant native timber<\/a>. One of the most recognizable typologies was the log cabin, built from large tree trunks notched at the corners for structural stability.<\/p>\n\n

\n \"A\n
\n Log cabins were popular in the U.S. during the 18th and 19th centuries.<\/span>\n Heritage Art\/Heritage Images via Getty Images<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

In the 1830s, wood construction underwent a significant shift with the introduction of balloon framing<\/a>. This system used standardized, sawed lumber and mass-produced nails, allowing much smaller wood components to replace the earlier heavy timber frames. It could be assembled by unskilled labor using simple tools, making it both accessible and economical. <\/p>\n\n

In the early 20th century, balloon framing evolved into platform framing<\/a>, which became the dominant method. By using shorter lumber lengths, platform framing allowed each floor to be built as a separate working platform, simplifying construction and improving its efficiency.<\/p>\n\n

The proliferation and evolution of wood construction helped shape the architectural and cultural identity of the nation. For centuries, wood-framed houses have defined the American idea of home \u2013 so much so that, even today, when Americans imagine a house, they typically envision one built of wood.<\/p>\n\n

\n \"A<\/a>\n
\n A suburban housing development from the 1950s being built with platform framing.<\/span>\n H. Armstrong Roberts\/ClassicStock via Getty Images<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

Today, light-frame wood construction dominates the U.S. residential market. <\/p>\n\n

Wood is relatively affordable and readily available, offering a cost-effective solution for homebuilding. Contractors are familiar with wood construction techniques. In addition, building codes and regulations have long been tailored to wood-frame systems, further reinforcing their prevalence in the housing industry.<\/p>\n\n

Despite its advantages, wood light-frame construction presents several important limitations<\/a>. Wood is vulnerable to fire. And in hurricane- and tornado-prone regions, wood-framed homes can be damaged or destroyed.<\/p>\n\n

Wood is also highly susceptible to water-related issues, such as swelling, warping and structural deterioration caused by leaks or flooding. Vulnerability to termites<\/a>, mold, rot and mildew further compromise the longevity and safety of wood-framed structures, especially in humid or poorly ventilated environments.<\/p>\n\n

The case for concrete<\/h2>\n\n

Meanwhile, concrete has revolutionized architecture and engineering over the past century. In my academic work, I\u2019ve studied, written and taught about the material\u2019s many advantages<\/a>.<\/p>\n\n

The material offers unmatched strength<\/a> and durability, while also allowing design flexibility and versatility. It\u2019s low-cost and low-maintenance, and it has high thermal mass properties<\/a>, which refers to the material\u2019s ability to absorb and store heat during the day, and slowly release it during the cooler nights. This can lower heating and cooling costs.<\/p>\n\n

Properly designed concrete enclosures offer exceptional performance<\/a> against a wide range of hazards. Concrete can withstand fire, flooding, mold, insect infestation, earthquakes, hail, hurricanes and tornadoes.<\/p>\n\n

It\u2019s commonly used for home construction in many parts of the world<\/a>, such as Europe, Japan, Mexico, Brazil and Argentina, as well as India and other parts of Southeast Asia.<\/p>\n\n

However, despite their multiple benefits, concrete single-family homes are rare in the U.S. <\/p>\n\n

That\u2019s because most concrete structures are built using a process called cast-in-place<\/a>. In this technique, the concrete is formed and poured directly at the construction site. The method relies on built-in-place molds. After the concrete is cast and cured over several days, the formwork is removed. <\/p>\n\n

This process is labor-intensive and time-consuming, and it often produces considerable waste. This is particularly an issue in the U.S., where labor is more expensive than in other parts of the world. The material and labor cost can be as high as 35% to 60%<\/a> of the total construction cost. <\/p>\n\n

Portland cement, the binding agent in concrete, requires significant energy to produce, resulting in considerable carbon dioxide emissions. However, this environmental cost is often offset by concrete\u2019s durability and long service life.<\/p>\n\n

Concrete\u2019s design flexibility and structural integrity make it particularly effective for large-scale structures. So in the U.S., you\u2019ll see it used for large commercial buildings, skyscrapers and most highways, bridges, dams and other critical infrastructure projects.<\/p>\n\n

But when it comes to single-family homes, cast-in-place concrete poses challenges to contractors. There are the higher initial construction costs, along with a lack of subcontractor expertise. For these reasons, most builders and contractors stick with what they know: the wood frame.<\/p>\n\n

A new model for home construction<\/h2>\n\n

Precast concrete<\/a>, however, offers a promising alternative. <\/p>\n\n

Unlike cast-in-place concrete, precast systems allow for off-site manufacturing under controlled conditions. This improves the quality of the structure, while also reducing waste and labor. <\/p>\n\n

The CRETE House<\/a>, a prototype I worked on in 2017 alongside a team at Washington University in St. Louis, showed the advantages of a precast home construction. <\/p>\n\n

To build the precast concrete home, we used ultra-high-performance concrete<\/a>, one of the latest advances in the concrete industry. Compared with conventional concrete, it\u2019s about six times stronger, virtually impermeable and more resistant to freeze-thaw cycles. Ultra-high-performance concrete can last several hundred years.<\/p>\n\n

The strength of the CRETE House was tested by shooting a piece of wood at 120 mph (193 kph) to simulate flying debris from an F5 tornado. It was unable to breach the wall, which was only 2 inches (5.1 centimeters) thick<\/a>.<\/p>\n\n

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