How Much Do Triple-Pane Windows Cost?
Typical Cost Range: $400 – $3,000 per window
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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 at the This Old House Reviews Team 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.
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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.
- Awning window: $1,100
- Bay window: $4,000
- Bow window: $9,600
- Casement window: $1,250
- Double-hung window: $820
- Hopper window: $700
- Picture window: $650
- Skylight window: $1,800
- Single-hung window: $575
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 Per Window
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.
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 Hire a Professional
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.
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
Are triple-pane windows worth it?
Whether triple-pane windows are worth it depends on your budget and your home’s needs. Triple-pane windows can greatly reduce energy bills in cold climates where it’s important to keep heated air indoors.
How much does it cost to install triple windows?
Installing triple-pane windows typically costs $1,000 per window, although the price can be as low as $400 or as high as $3,000 depending on the window type.
What are the disadvantages of triple-pane windows?
Triple-pane windows are more expensive to buy and install than single- or double-pane windows. They’re also heavier, require a sturdier frame, and don’t reduce much more noise than double-pane windows.
What is the difference between triple-pane windows and double-pane windows?
Double-pane windows consist of two glass panes with a spacer gas in between. Triple-pane windows consist of three glass panes also separated by spacer gas. Triple-pane windows are more energy-efficient and expensive than double-pane windows.
How do I know when to replace my windows?
If you see condensation between the panes of double- or triple-pane windows, the seal has failed and you need new ones. Likewise, if you notice more sound from the outdoors or feel any drafts, your windows are no longer properly insulated. Finally, rising energy bills with no other explanation are often a sign that heat is leaking from your windows.
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