Triple-pane windows consist of three glass panes with a gas-insulated space between each layer. Although these windows are more expensive and less common than double- or single-pane windows, they’re more energy efficient and better at preventing heat loss.

We have researched the best replacement windows and compiled this guide to triple-pane windows to help you decide if they’re right for your home.

---

What Is The Average Cost Of Triple-Pane Windows?

The cost of triple-pane windows can vary considerably from as low as $400 to well over $3,000. However, they cost an average of $1,000 per window, including installation. Your total cost depends on the size and type of window being replaced, as well as the frame material and any extra cost for labor.

---

Triple-Pane vs. Double-Pane Windows

Double-pane windows are a lower-cost alternative to triple-pane windows. Though three glass layers provide better insulation and energy efficiency than two, both double- and triple-pane windows are more efficient than single-pane windows, particularly if you pick an Energy Star-rated design. Here’s how the two stack up against each other.

Triple-pane windows are slightly better at blocking sounds but the difference is often minimal. Both have a similar sound transmission class (STC) value, though high-end triple-pane windows can be slightly more soundproof. Additionally, three glass panes are harder to break than two, so triple-pane windows are more secure.

The highlight of triple-pane windows are their insulating properties, which allow for better energy savings. Windows with a high R-value are better at blocking heat flow, allowing less heat to escape your home in cold weather. Double-pane windows may allow up to 10% of heat to escape the home, while triple-pane windows reduce that number to 3%.

---

What Factors Affect Triple-Pane Window Cost?

• Window type: Smaller, less complex windows cost less.
• Labor: The easier a window is to install, the less labor costs.
• Material: Aluminum is the least expensive frame material and fiberglass is the most expensive.
• Story: First floor windows cost less to install than those on higher floors.
• Gas fill: Windows filled with krypton gas are more expensive than those with argon.
• Glass treatment: Low-E glass costs more than regular glass.

Cost by Window Type

Different types of windows come with different costs. Large windows with complicated opening mechanisms cost more in both materials and labor. Here are some average costs per window, including installation.

Labor Cost

Triple-pane windows have higher labor costs because they’re heavier and more difficult to work with. You’ll want to budget about $100–$800 per window for triple-pane window installation. Anything that increases the time and effort it takes to install the window will also increase the price.

Cost by Material

Costs also vary by window frame material. Aluminum is usually the cheapest window replacement option, but it’s also the poorest insulator. Insulated vinyl is a better choice if you want energy-efficient windows. Fiberglass is the most insulating and durable material, but it’s expensive and harder to find.

Cost by Story

First floor windows are the least expensive. Replacing windows on upper stories typically takes at least an hour longer and requires extra equipment and safety precautions, increasing the installation cost.

Cost by Gas Fill

Triple-pane windows’ energy-efficient properties come from the three glass panes as well as the insulating gas in the space between them. Krypton gas is the highest-quality gas fill but it’s the most expensive. Argon gas is more common and affordable. It’s slightly less effective than krypton, but it still does a much better job of preventing heat transfer than standard air.

Glass Treatment

Purchasing windows with a low-emissivity (Low-E) coating will further reduce your energy costs. Low-E glass has a thin coating that allows less sunlight to pass through, making it more energy-efficient. Windows with Low-E glass cost about 15% more than standard windows.

---

Professional vs. DIY

Triple-pane windows are heavy and difficult to work with, so it’s usually wise to have them professionally installed rather than trying to do it on your own. Here’s what to expect from both professional and do-it-yourself (DIY) installation.

Professional Window Installation

A window replacement contractor can usually install one new window in an hour. However, it will take longer to install windows on upper floors. Professionals will know how to meet all necessary building codes and work with your home’s existing structure to ensure everything is properly installed.

DIY Window Installation

Installing triple-pane windows is not a DIY-friendly job. Though the process will be cheaper if you do the project yourself, it will take longer, and you must buy all the necessary tools and insulating materials.

---

---

How To Save on Triple-Pane Windows

Here are some ways to keep window costs down, even if you hire professional installers.

• Choose a frame material that’s inexpensive but still provides proper insulation. This usually means insulated vinyl frames.
• Stick with standard window sizes and styles.
• Replace all your windows at once if possible. Though this will cost more up-front, it will ultimately be less expensive than having them done one at a time.
• Replace your windows during summer or winter, when window contractors are less in-demand and may charge less.
• Get quotes from multiple contractors. You may be able to negotiate.

---

How Do Triple-Pane Windows Work?

Triple-pane windows, also called triple-glazed windows, have three glass panes each separated by a layer of gas that’s sealed into the sash. Glass on its own isn’t a good insulator of heat or sound, so the gas fill works to keep heat and noise from transferring through. Triple-pane windows are significantly more energy-efficient and slightly better at reducing sound than double-pane windows.

---

Our Conclusion

Triple-pane windows are typically best for cold climates. Though more expensive, the cost will be offset by savings on your heating bill. We recommend having these windows professionally installed. This will cost more than doing it yourself, but it’s quicker and will ensure the job is done correctly, as triple-pane windows can be difficult to work with.

---

FAQ About Triple-Pane Window Cost

To share feedback or ask a question about this article, send a note to our Reviews Team at reviews@thisoldhousereviews.com.