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Argon Gas in Windows: The Pros and Cons

When picking a replacement window for your home, you’ve no doubt noticed the so-called gas fills in the glass. Nowadays, argon is one of the most popular gas fills that can be found in windows due to their affordability, non-toxicity and odorlessness. However, that’s not all you need to know about argon gas.

Read on as Renewal by Andersen® – Montana shares the pros and cons of putting argon gas in windows.

Pro: Improved U-Value

One of the many benefits of argon gas fills is that they can improve the u-value of any window that uses it as a gas fill. The lower the u-value of your window, the more you’ll save on your monthly energy bills in the long run.

Con: Leakage Rate

Despite its ability to improve the u-value of double-hung or casement windows, a gas fill like argon can still leak from your windows even though the seals are still intact. In fact, according to studies, the leakage rate of argon gas filled windows is expected to be at 1% per year, at best. These leaks can eventually exhaust the gas in your windows, leaving it vulnerable to moisture-laden air.

Pro: Versatility

Homeowners will be delighted to know that argon is a versatile gas fill for windows. This is because it can be used in all climates and combined with low-E coatings for optimal window performance, meaning you can have an energy-efficient window no matter the season or location of your home. Apart from that, they can also be used in residential and commercial window sizes and styles, allowing its use for both homes and buildings alike.

Con: Does Not Expand or Contract

Another disadvantage that argon gas carries with it is that unlike other gas fills, it doesn’t expand or contract alongside the window’s glass. This means that it can eventually destroy the seals that contain the gas between the glass panes, which can result in condensation for your window.

Planning to install custom windows in your home? Then don’t hesitate to turn to Renewal by Andersen – Montana. When it comes to window and door replacement, we are your number one service providers. Give us a call at (406) 206-2377 or fill out our contact form to get a FREE quote.


"I highly recommend Renewal by Andersen. We were treated well and everything went smoothly from start to finish. The company kept in contact with me before, during, and after the installation and let me know what to expect. I'm in love with my new windows! I will be using this company again when we refinish our basement. "

July, 21

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