Double-pane windows offer an edge over their single-pane counterparts, providing better insulation, sound reduction, and energy efficiency.
They feature two insulated glass panes that sit approximately half an inch apart. An argon gas-filled spacer between the panes regulates heat transfer and minimizes temperature loss through the window. The combination of these components creates an insulated glass unit (IGU).
In this article, we will discuss the cost of double-pane windows and how you can not waste money on your home’s project. Keep reading to learn how these cost factors can impact your final bill.
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How Much Do Double-pane Windows Cost?
On average, double-pane windows are $700 per window. Your specific cost will largely depend on the window type, material, and size you choose. They can go as high as $6,900 per window or as low as $300 per window.
| Low-end Cost Range | $200–$700 |
| National Average Cost Range | $700–$1,700 |
| High-end Cost Range | $1,700–$6,900 |
We research cost data on RSMeans, a project cost estimator database for contractors. The rough cost figures included in this article cover materials and average installation fees.
What Factors Affect the Cost of Double-pane Windows?
Though most dual-pane windows hover between $700–$1,700, they can cost as low as $300 or as high as $6,900. This cost range is expansive because any window type, size, or material can have double-pane glass.
We explain each of these cost factors below to provide a clearer picture of double-pane window pricing, which can vary based on the company you use for window replacement.
Cost of Double-pane Glass by Window Type
One of the main determinants of your double-pane window’s cost will be the type of window it is. For example, you’ll inevitably pay much more for a bay window than a small double-hung window (and even less for a single-hung window). However, your best bet when budgeting is to decide on the window style you need, then research insulated glass costs for that specific type.
The graphic below shows how different window styles compare by price.
Cost of Double-pane Glass by Window Size
Insulated glass typically costs between $10–$20 per square foot. The size of your double-pane window will significantly affect your costs. Because smaller windows take fewer materials and less time to install, their material and labor fees will be lower, and vice versa.
You can expect to pay more for double-pane windows with custom dimensions. Custom-size windows of any kind have costlier manufacturing processes, leading to higher retail prices. Custom dimensions may also yield a more difficult installation process, which will tack some more dollar signs to your bill.
To get a better idea of how window size affects costs, we’ve listed prices for double-pane casement windows by size:
| Insulated Window Size | Average Cost Range |
| 2’ X 2’ | $410 |
| 2’ X 3’ | $480 |
| 2’ X 4’ | $550 |
| 2’ X 5’ | $625 |
| 3’ X 5’ | $660 |
| 3’ X 6’ | $880 |
| 4’ X 4’ | $975 |
| 4’ X 6’ | $1,065 |
| 5’ X 4’ | $1,115 |
| 6’ X 4’ | $1,160 |
| 6’ X 5’ | $1,310 |
| 7’ X 5’ | $2,020 |
| 8’ X 5’ | $2,855 |
Cost of Double-pane Windows by Frame Material
If you’re replacing the entire window — not just the glass unit — the frame material will also impact your project costs. Different frame materials have varied aesthetic and energy-saving benefits, so replacing old windows with new double-pane glass and durable framing can be a game changer for your home.
Vinyl windows are the cheapest option, while wood windows are the most expensive. The following table lists other common window frame materials and their costs.
| Insulated Window Material | Average Cost Range |
| Vinyl | $400–$1,100 |
| Fiberglass | $450–$1,200 |
| Metal | $600–$1,600 |
| Composite | $600–$1,600 |
| Wood | $800–$1,800 |
Read our guide window frame materials to learn about the pros and cons of each option.
Additional Factors That Impact the Cost of Double-pane Windows
While the picture window itself comprises a large portion of the final cost, it’s essential to consider other aspects of the process. Labor, brand, season, and required permits can affect the final cost of your home improvement project. You must allocate extra for these things and unexpected issues that arise during the installation process.
We spell out additional cost factors in more detail below to help you budget accordingly.
Installation and Labor Costs
Installation fees will make up a significant portion of your double-pane window replacement costs. Depending on the type of window, installation typically costs between $40–$75 per hour. More complex installations for skylights, egress windows, and bay windows can reach up to $240 per hour.
Glass Coatings and Films
In addition to the insulative gas filler, double-pane windows usually feature a low-emissivity (Low-E) tint on the outer glass. Low-E coatings, generally consisting of metal or metallic oxide, can reduce energy loss by up to 50%. If you decide to add these coatings or other UV reflective tints to existing double-pane windows, you can expect to pay $5–$15 per square foot.
Brand
Like most products, certain window brands are pricier than others. Double-glazed windows are widely available but come in a range of prices. Some brands offer standard-size double-pane windows for less, while other brands offer premium, custom-designed windows for more.
Permits
Before installing or replacing windows in your home, check local building codes. Many areas require a permit before installing new windows, which can add between $200–$500 to your project. Permit costs are usually included if you hire a professional for the installation, but double-checking beforehand won’t hurt.
Project Size
The number of windows and project scope will affect the overall cost. For example, if your home is a single-story ranch, it will take less time to replace the windows than it would for a two-story house. Additionally, your window installation project might involve repairing one broken window or completely replacing your home’s existing one.
Some window dealers require a minimum purchase, but once you surpass this limit, you can take advantage of various promotions and rebates to cut costs. Discounts aren’t available from every window dealer, but you should definitely shop around for the chance to revamp your home’s windows for less.
Time of Year
Like many professions, window installers have busy seasons and slow seasons. Given the fluctuation in business, there can be times of the year when it’s more expensive to overhaul your windows. Most window installers are busiest during spring and fall, while they may have a slower period during the summer and winter.
Costs rise as demand increases, and installers can be stretched thin between dozens of projects. If you decide to install your windows in a busy season, you may hit a higher cost range than completing the project during the off-season.
However, projects due take a long time, especially if the windows have to be 100% fabricated, so it is recommended to look into replacement windows when there is less natural light and the days are shorter (during the winter) to have an installation during the summer when the days are longer.
What Are the Benefits of Double-Pane Windows?
Incorporating dual-pane windows into your home can reap numerous benefits, such as fewer condensation issues, better insulation, superior soundproofing, and lower energy costs.
Fewer Condensation Issues
Condensation is an ever-present concern for single-pane windows. It signifies the window seal deterioration that allows moisture and air to seep in. When these tiny droplets of moisture appear, it’s usually time for a new window since the seal isn’t doing its job.
Condensation concerns drop drastically with a well-installed, adequately sealed, energy-efficient double-pane window. Between the tight seals and careful installation, condensation concerns become a thing of the past as long as the seal remains intact.
See our guide on double-pane windows condensation removal for more detailed explanation.
Improved Insulation
Improved insulation is one of the most notable perks of double-pane glass windows. According to the United States Department of Energy, inefficient windows contribute 25% to 30% of energy loss in annual heating and cooling costs for an average residential home.
These energy-efficient windows help trap in warmed or cooled air throughout the year, ensuring your home remains as comfortable as possible — a major benefit for homeowners in extremely hot or cold climates. The HVAC system doesn’t need to work as hard to maintain a stable temperature, which will be reflected in a lower utility bill.
Superior Soundproofing
In addition to energy efficiency, better insulation, and limited condensation issues, double-pane windows offer superior soundproofing. Compared to old, single-paned windows or those with loose panes, these windows provide excellent sound insulation.
Loose-paned windows can transfer sound vibrations from outside conversations, construction, traffic, and emergency sirens into your home. Double-pane windows offer better sound insulation and absorption, ensuring your home stays quiet and you remain undisturbed by the activity around your home. Find more information in our guide to soundproofing your windows.
Added Durability
Double-pane windows offer a second layer of safety and durability with dual sheets of glass. Although the glass can break, impacts may only break the first layer, leaving the second pane intact. The added durability of these windows makes them well-suited for safety and security, as a broken window doesn’t necessarily leave your home open to intruders or a draft from the outdoors.
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Do Double-Pane Windows Have Any Drawbacks?
Although double-pane windows offer extensive perks, they aren’t without drawbacks. While switching to them can lead to a significant drop in utility bills, the switch is pricey — especially if you go all-in. You might not notice any difference in your utility bills if you only switch one or two windows, so committing fully is essential if you expect to see a drastic difference.
In addition to the steep price tag, window repair can be challenging. If everything remains intact, you shouldn’t have issues with factors like condensation. However, if the seal is compromised or a problem develops with the air gap between the panes, the doors to heat loss, insulation issues, and condensation problems open.
Unfortunately, glass replacement is usually necessary when these issues develop, as repairs are often complicated and expensive. Read our guide to repairing broken window glass to learn more about this process.
Triple-pane Windows Vs. Double-pane Windows
Triple-pane windows feature three panes of glass separated by gas-filled gaps — much like dual-pane windows.
Double-pane windows are a step up from their single-pane counterparts, but if you want to take things further, you could choose triple-pane windows. These windows offer many of the same benefits as double-pane windows, although with extra benefits that provide them an edge over double-pane options.
For example, double-pane windows offer better insulation than single-pane windows, but triple-pane windows blow both out of the water with maximum energy efficiency. In addition, triple-pane windows offer better noise reduction, ensuring your home remains comfortably quiet.
While triple-pane windows provide better energy efficiency and noise reduction, these benefits come at a cost. Triple-pane windows are considerably pricier than double-pane options — sometimes $40+ per square foot — so expect a lofty bill if you choose them.
Average Cost for Triple-Pane Windows
The benefits of triple-pane windows aren’t cheap, especially compared to single-pane or double-pane window pricing. A triple-pane window costs about $1,000 per unit or between $400 to $3,000 for each window.
Of course, the exact project cost for upgrading your whole home to triple-pane windows hinges on various factors, including the frame material, labor costs, and sizing.
DIY Vs. Professional For Cheaper Double-pane Window Installation?
Some window installations are straightforward enough for handy DIYers to handle themselves. However, some installations are much more complex, requiring the expertise of a professional.
The route you choose will significantly impact the cost of your installation, as DIYing the project eliminates extra costs for labor. If you outsource the project to a professional, you can expect to pay an average of $100 to $300 per window in labor — or approximately $40 to $75 per hour. It’s important to note that complicated or oversize window installations will cost more due to longer installation times.
You can also inquire about the replacement cost for window glass by contacting local window service providers or contractors in your area. This way, you can gather more detailed information and make an informed decision about your window replacement project.”
Are Double-pane Windows Worth the Cost?
Double-pane windows can be the perfect solution to high heating and cooling costs caused by drafty windows. Of course, investing in a whole set of double-pane windows is expensive, so you can expect to budget for considerable replacement costs. However, the new windows will offer excellent sound reduction, superior insulation, and extra energy efficiency, making them well worth the investment.
With this information in mind, you’re ready to start shopping for new dual-pane windows. Fill out the form below to get quotes from top-rated window companies in your area.
FAQs About Double-pane Glass Costs
Do Double-pane Windows Make a Difference?
Double-pane windows can make a considerable difference, especially if your current windows are old or faulty. Insulated glass windows trap heated and cooled air in your home, which prevents your HVAC system from working overtime to stabilize indoor temperatures.
ENERGY STAR-certified double-pane windows offer an average of 12% household energy savings. So if you’re seeking lower energy bills, keep an eye out for this certification.
Is Double-pane Window Replacement Worth It?
If your home currently has single-pane or old, worn-out windows, replacing them with high-quality double-pane windows can be a worthwhile upgrade. They offer better sound reduction, energy efficiency, and insulation, making them worthwhile. However, the decision is entirely yours, as they’re a pricey investment.
What’s Between Insulated Glass Window Panes?
Double-glazed windows contain an insulative krypton or argon gas layer that reduces thermal transfer through the window. These gasses are clear, nontoxic, and odorless, so escaped gases due to broken glass won’t pose a threat.
Do Double-pane Windows Reduce Sound?
Yes, double-pane windows reduce sound depending on the window type you currently have. If you’re upgrading from old, loose, single-pane windows, double-pane products reduce sound from the outdoors more. Their design offers better sound reduction, as it reduces the transfer of noise vibration from activities outside your home.
How Do I Know If Double-pane Windows Are Best for Me?
Double-pane windows are a worthwhile investment for homeowners with old, loose, or drafty windows. Double-pane windows are an excellent middle-ground option between single-pane and triple-pane models. They provide better energy efficiency and sound reduction than single-pane windows at a lower price than triple-insulated glass units.
