A Piece of Glass Thinner Than a Credit Card Could Solve America’s $25 Billion Energy Problem

Here’s one more thing we owe to the restless mind of Steve Jobs : hyper-efficient, ultra-tough windows for homes.

This new kind of window could save American households billions of dollars in wasted energy each year, while allowing expansive views of the outdoors and making our homes quieter, more comfortable and able to survive even the most violent weather. The key enabling technology is thin panes of glass—sandwiched between thicker standard glass—which exist because of the same manufacturing and chemistry breakthroughs that made possible the light, strong, scratch-resistant screens on our smartphones, tablets and watches.

Typical double-pane windows have hardly changed since their invention a century ago. Filling them with inert gases or adding coatings to reflect or let in heat has made them more effective. But it’s still generally accepted that, all other things being equal, your home’s energy bills will go up or down based on how many windows you have, and how big they are.

“Windows are always viewed as the problem, because windows typically lose 10 to 20 times more energy per square foot than a well-insulated wall,” says Stephen Selkowitz, an affiliate at the Lawrence Berkeley National Laboratory and a dean in the field of building energy efficiency. The Energy Department estimates that U.S. households each waste $200 to $400 a year on energy bills due to drafts, leaks and inefficiencies, for a total of at least $25 billion a year.

These new three- and four-pane windows can be even better insulators than the walls around them, but cost only about 20% more than standard energy-efficient windows. Installing them could bring big energy savings for those ready to retrofit, and could enable the construction of new homes that are so well-insulated that even when the power goes out in a winter storm, they stay warm for days. Another variant of these windows can meet the most stringent hurricane-related building codes in the country, while being significantly lighter than conventional stormproof windows.

The bad news is that Joe and Jane Consumer won’t be able to buy these kinds of windows at the local home-supply store—at least not yet. While the primary manufacturer of this type of window is offering its tech to other window makers, it’s only opened up U.S. production in the past few months, and it’s still scaling up manufacturing.

Bringing the panes

Scientists have long known the key to more efficient windows is similar to the relationship between razorblades and a closer shave: More is better. But it was hard to translate that into a product that could be mass manufactured, at a price that people would be willing to pay, says Selkowitz.

Enter Corning , maker of the thin, tough Gorilla Glass that has helped make possible today’s mobile devices. In order to win over Steve Jobs and land Apple as a client when it first started making iPhones, Corning offered Apple a fresh twist on its existing process for making glass for LCD displays and other applications, which yielded a new kind of chemically strengthened glass.

Traditional glass, called soda-lime glass, is made by floating molten glass on top of molten tin, which is a cheap and effective process but leaves microscopic flaws. With Gorilla Glass, molten glass with different additives than soda-lime glass cascades in a waterfall as thin as half a millimeter, which rapidly cools and is cut to size, yielding glass that is nearly flawless. The glass is also chemically strengthened, making it resistant to scratches and chipping.

As the smartphone industry ramped up, Corning built more factories to meet demand for Gorilla Glass. Some of these factories now use the same process, with a slightly modified chemistry, to create far larger sheets of similarly tough glass, for windows instead of hand-held devices. These sheets of glass are thinner than a credit card, yet they can be bigger than a queen-size mattress, says Ron Verkleeren , senior vice president of Corning’s emerging-innovations group.

This architectural glass doesn’t yet have a compelling name like Gorilla Glass, but they’re working on it, he adds. (“Orangutan Glass” has my vote.)

When three or even four layers of glass are put together, with inert gas in between, only the interior panes are the super-thin Corning panes, and they add little weight to the finished product.

When you go from a single air gap to the two or three that are possible with triple- and quad-pane windows, the insulating ability of a window can skyrocket, says Selkowitz, who has collaborated at the federally funded Lawrence Berkeley lab with Alpen, a Colorado-based maker of specialty windows, to research their capabilities.

Efficiency and more

Alpen’s windows have long been favored by architects who want to build super energy-efficient homes. Corning began collaborating with Alpen about five years ago, and now the company is ready to mass-manufacture reinforced windows at two facilities, one in Colorado and one in Pennsylvania. The first wave will be windows in standard sizes, says Andrew Zech, Alpen’s CEO. Key to keeping costs down are the company’s new automated, high-throughput assembly lines for making the windows, he adds.

David Schleicher, managing director of Kala, a high-performance builder in Kansas City, Mo., has been living with a wall of triple-pane windows comparable to Alpen’s on the south side of his home since 2015. Typically, such a vast expanse of glass—a total of 16 feet by 7—would create an unpleasantly cold patch during the winter. But this glass is so well insulated, it actually creates warmth in his living room: It admits the radiant heat of the low winter sun but prevents conductive heat loss through the window, says Schleicher.

“With the right glass in my house, my heat won’t even be running on a winter day, as long as the sun is shining and it’s coming in the window,” he says. “It is crazy—I will be in shorts and a T-shirt and it’s 20 degrees outside. Meanwhile, my neighbors are paying out the nose in heating and cooling bills.”

Whether or not these innovative new windows take off depends largely on the demand from builders, homeowners and landlords.

Historically, the biggest reason that energy-efficient technologies get adopted is that building codes require them, says Schleicher. Without explicit regulations that enforce minimum standards, builders often seek deals on materials so that they can maximize profits, and businesses and individuals who rent out properties often have little incentive to reduce tenants’ month-to-month energy bills.

Slashing home energy bills is just the next chapter for the tech that brought us smartphone glass.

Miter Brands is producing windows in North Venice, Fla. in which it layers Corning’s tough glass onto windows designed to withstand hurricane-force winds. Previously, the company’s impact-resistant glass doors weighed up to 600 pounds; using Corning thin glass inside has cut the weight by up to 40%, says Dean Ruark, vice president of engineering and innovation at Miter subsidiary PGT Innovations.

Despite being lighter, these new doors can pass the most stringent hurricane testing in the country: Miami Dade’s building codes for hurricane resistance. This involves withstanding air pressure equivalent to a major hurricane, and a two-by-four fired from a cannon at 34 miles an hour…twice.

Former New Hampshire Gov. Chris Sununu delivered a warning to Treasury Secretary Scott Bessent during a recent visit to Washington: Already-high airfares will surge if the war in Iran doesn’t end soon.

Sununu, a Republican who represents some of the biggest airlines as president of the industry group Airlines for America, has for weeks sounded the alarm to Trump administration officials about the economic fallout from high jet fuel prices. The war, Sununu has argued, must come to a close soon, or things will get worse.

Administration officials have gotten the message.

Privately, President Trump’s advisers are increasingly worried that Republicans will pay a political price for the rising fuel costs, according to people familiar with the matter. Many of those advisers are eager to end the war, hoping prices will begin to moderate before November’s midterm elections.

The fallout from the U.S.-Israeli attack in late February has slowed traffic through the Strait of Hormuz, a vital shipping lane, triggering a sharp increase in oil, gasoline and jet-fuel prices.

That means consumers are grappling with high costs ahead of the summer travel season, as they consider vacation plans.

Sixty-three per cent of Americans said they put a great deal or a good amount of blame on Trump for the increase in gas prices, according to a new poll conducted by NPR, PBS and Marist.

More than 8 in 10 Americans said struggles at the gas pump are putting strain on their finances.

Jet-fuel prices roughly doubled in a matter of weeks after the war began, and they have remained high. Airlines have said that will add billions of dollars of additional expenses this year, squeezing profit margins.

U.S. airlines spent more than $5 billion on fuel in March—up 30% from a year earlier, according to government data.

Carriers have been raising ticket prices, hoping to pass the cost along to consumers, and they are culling flights that will no longer make money at higher price levels.

In March, the price of a U.S. domestic round-trip economy ticket rose 21% from a year earlier to $570, according to Airlines Reporting Corp., which tracks travel-agency sales.

So far, airlines have said the higher fares haven’t deterred bookings and they are hoping to recoup more of the fuel-cost increases as the year goes on.

Earlier this week, Trump said the current price of oil is “a very small price to pay for getting rid of a nuclear weapon from people that are really mentally deranged.”

Secretary of State Marco Rubio told reporters that if Iran got a nuclear weapon, the country would have more leverage to keep the strait closed and “make our gas prices like $9 a gallon or $8 a gallon.”

Trump has taken steps in recent days to bring the war to an end. Late Tuesday, the president paused a plan to help guide trapped commercial ships out of the Strait of Hormuz, expressing optimism that a deal could be reached with Iran to end the conflict.

Crude oil prices fell below $100 a barrel on Wednesday, after reports that Iran and the U.S. are working with mediators on a one-page framework to restart negotiations aimed at ending the conflict and opening the strait.

Sununu said Trump administration officials are conscious of the economic fallout from the war: “They get it…and I think that’s why they’re trying to get through the war as fast as they can.”

But he cautioned that it could take months for prices to return to prewar levels.

“Ticket prices won’t go down immediately” after the strait is fully reopened, Sununu said. “You’re looking at elevated ticket prices through the summer and fall because it takes a while for the prices to go down.”

Since the initial U.S.-Israeli attack in late February, Sununu has met in Washington with National Economic Council Director Kevin Hassett, representatives from the Transportation Department and senior White House officials.

A White House official confirmed that Hassett and Sununu have discussed the effect of increased fuel prices on the airline industry. The official said the conversation touched on how the industry can mitigate the impact of high jet fuel prices on consumers.

“The president and his entire energy team anticipated these short-term disruptions to the global energy markets from Operation Epic Fury and had a plan prepared to mitigate these disruptions,” White House spokeswoman Taylor Rogers said, pointing to the administration’s decision to waive a century-old shipping law in a bid to lower the cost of moving oil.

Rogers said the administration is working with industry representatives to “address their concerns, explore potential actions, and inform the president’s policy decisions.”

A Treasury Department spokesman pointed to Bessent’s recent comments on Fox News that the U.S. economy remains strong despite price increases. The spokesman said Treasury officials have met with airline executives, who have reaffirmed strong ticket bookings.

“We’re cognizant that this short-term move up in prices is affecting the American people, but I am also confident, on the other side of this, prices will come down very quickly,” Bessent told Fox News on Monday.

The war has already contributed to one casualty in the industry: Spirit Airlines. Company representatives have said they were forced to close the airline because the sustained surge in jet-fuel prices derailed the company’s plan to emerge from chapter 11 bankruptcy.

The Trump administration and Spirit failed to come to an agreement for the company to receive a financial lifeline of as much as $500 million from the federal government.

Transportation Secretary Sean Duffy has argued that the Iran war wasn’t the cause of Spirit’s demise, pointing to the company’s past financial struggles, as well as the Biden administration’s decision to challenge a merger with JetBlue.

Other budget airlines have also turned to the federal government for help since the U.S.-Israeli attack. A group of budget airlines last month sought $2.5 billion in financial assistance to offset higher fuel costs, and they separately wrote to lawmakers asking for relief from certain ticket taxes.

A Piece of Glass Thinner Than a Credit Card Could Solve America’s $25 Billion Energy Problem

New windows can insulate better than most walls, and some can even survive being hit with a two-by-four shot from a cannon.

Bringing the panes

Efficiency and more

Administration officials have spoken to the airline industry, which has voiced concerns about the rising costs.