How to Soundproof Windows and Keep the Noise Out

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Ever tried to enjoy a quiet evening at home, only to have it interrupted by the roar of traffic, honking horns, or noisy neighbors?

Soundproofing your windows could be the game-changer you didn’t know you needed.

While many people assume that achieving serenity requires complex renovations or moving to a quieter neighborhood, the truth is you can significantly reduce external noise by effectively soundproofing your windows.

Whether you opt for high-end acoustic windows or DIY solutions like window plugs and heavy drapes, the right approach can turn your home into a peaceful haven.

Intrigued by the idea of a quieter home?

Let’s dive into the nitty-gritty of why windows are such noise culprits and how you can soundproof them to achieve the tranquility you crave.

Why Do Windows Let in So Much Noise?

A visual representation of a window's cross-section, illustrating the concept of airborne noise transmission. Colorful soundwaves representing car engines, human conversations, and music strike the window's surface, symbolizing the ease with which these sounds pass through the thin and less dense glass, resulting in noise transmission.

Navigating the noise pollution in our daily lives can be challenging, especially when our homes become inundated with external sounds.

Windows are often a primary culprit in letting in this disruptive noise.

To effectively soundproof your windows, it’s crucial to understand why they let in so much noise and the science behind sound transmission.

What Type Of Noise Are We Dealing With?

Airborne noise is the most common type of noise that enters through windows. This includes sounds like car engines, human conversations, and music.

These sounds are transmitted through the air and strike the window surface, causing vibrations that lead to noise.

The reason airborne noise is so effective at penetrating windows is because of the thinness and less dense nature of the glass, making it easier for the sound waves to pass through.

In older buildings, this problem is exacerbated by the use of single-pane windows, which provide almost no resistance to sound.

Even in modern buildings with double-pane windows, the level of soundproofing can be insufficient, especially if the windows are not well-sealed.

When considering soundproofing options, it’s essential to focus on materials and methods that are particularly effective against airborne noise.

What Window Soundproofing Do I Need?

An image of a home interior with multiple windows, some of which are highlighted for potential soundproofing. Arrows and labels indicate which windows should be prioritized for soundproofing based on factors like noise proximity and window condition, assisting homeowners in making informed decisions.

When it comes to soundproofing your home, identifying specific needs is just as important as knowing the various methods available to you.

Before investing time and money into soundproofing your windows, it’s crucial to understand what exactly needs to be addressed.

From identifying the type of noise that’s causing the most disturbance to figuring out which windows are the biggest culprits, a detailed assessment will set the foundation for a successful soundproofing project.

How Can I Measure the Noise Levels Myself?

For those who like to take a more hands-on approach, measuring the noise levels yourself can be incredibly helpful.

While specialized equipment like decibel meters is available, you can also use various smartphone apps designed to measure sound levels.

When taking measurements, it’s a good idea to do so at different times of the day.

Noise levels can vary depending on the time and even the weather conditions.

Which Windows Should I Prioritize for Soundproofing?

Most of your rooms would have only one window which then you will have no difficulty choosing.

But in the event if there are more than one, then prioritizing your windows is an important part of any soundproofing project.

Especially if you’re working with a limited budget.

The logical starting point is to focus on the windows closest to the source of the noise.

If you live on a busy street, the windows facing the street are likely the biggest culprits and should be your first priority.

But it’s not just about proximity to the noise source. The age and condition of your windows also play a significant role.

Older, single-pane windows or windows with damaged seals should be high on your list for upgrades.

What Are My Options for Soundproofing Windows?

In an illustrative representation, different options for soundproofing windows are segmented for comparison. The visuals include double-pane and triple-pane windows, window inserts, weatherstripping, DIY window plugs, heavy curtains/drapes, and acoustic caulk. Each segment highlights key features, effectiveness, and cost considerations. The image serves as a comprehensive guide, offering insights into various window soundproofing methods tailored to different preferences and budgets.

Choosing the right soundproofing method for your windows can be a balancing act between effectiveness and cost.

Double-pane and triple-pane windows offer significant noise reduction but come at a higher price point.

On the other hand, window inserts provide the ultimate in soundproofing and also weatherproofing.

In this section, we’ll explore these options in detail to help you determine which one best suits your needs and budget.

Double-Pane and Triple-Pane Windows

When it comes to window replacements, one of the most effective soundproofing options is installing a new double-pane or triple-pane windows.

These windows consist of two or three layers of glass separated by a layer air pocket.

This layer of air pocket acts as an insulator, reducing the amount of heat and sound that can pass through the window.

The result is a quieter, more energy-efficient home.

However, double-pane and triple-pane windows are a significant investment. They can cost several hundred dollars per window, not including installation fees.

While they offer excellent soundproofing capabilities, they may not be the most budget-friendly option for everyone.

Weigh the benefits against the costs to determine if this is the right solution for your specific needs.

Window Inserts

Window inserts are a more budget-friendly alternative to full window replacements.

These are additional panes of glass that can be fitted inside your existing window frame.

They act as a second barrier to sound, helping to reduce the amount of noise that enters your room.

The advantage of window inserts is that they’re relatively easy to install and much less expensive than replacing your windows entirely.

However, the effectiveness of window inserts can vary.

Look for brands that have reviews of good window inserts to ensure that they do good soundproofing and also weatherproofing at the same time.


Weatherstripping is a straightforward and cost-effective method for enhancing your windows’ soundproofing capabilities, but its effectiveness depends on the specific issues you’re facing.

If the sound is leaking into your home because your windows can’t completely close when shut, weatherstripping can be a lifesaver.

By applying a strip of material around the window frames, you can seal those problematic gaps and reduce noise infiltration.

However, it’s important to note that weatherstripping tackles the problem of gaps and leaks but doesn’t address the issue of sound transmission through the glass itself.

If your windows are made of a thin layer of glass, you’ll find that sound will still pass through, regardless of how well the gaps are sealed.

In such cases, weatherstripping can serve as a supplemental measure, but you may need to consider additional soundproofing methods for more comprehensive noise reduction.

So, while weatherstripping won’t solve all your soundproofing problems, it’s certainly a valuable, budget-friendly addition to your noise-reducing toolkit, especially when used in conjunction with other soundproofing techniques.

DIY Window Plugs

DIY window plugs are essentially another form of window inserts, usually crafted from acrylic glass surrounded by foam.

The foam is custom-cut to fit the pocket of your window frame snugly, ensuring a tight seal.

These plugs serve as an additional sound barrier that can be inserted or removed as needed.

It’s crucial that the window plug fits your window frame precisely.

An ill-fitting plug will not provide optimal soundproofing and may even allow noise to leak through gaps.

When properly fitted, DIY window plugs can be a cost-effective way to reduce noise levels, especially for those on a budget.

While these plugs are generally effective at reducing noise, they do have limitations.

They are not a permanent solution, as they need to be removed to open the window.

Additionally, while they can block a significant amount of noise, they may not offer the comprehensive soundproofing that more advanced methods provide.

Nonetheless, they are a budget-friendly option worth considering, especially if used in combination with other soundproofing techniques.

Heavy Curtains / Drapes

Heavy drapes are another budget-friendly option for reducing window noise. The principle here is simple: the thicker the material, the more sound it will absorb.

Heavy drapes made from dense materials like velvet or brocade can be surprisingly effective at blocking out noise.

However, it’s important to note that while drapes can reduce the amount of noise that enters your room, they won’t block it out entirely.

They’re most effective against higher frequency sounds and less so against low-frequency noise.

If you’re looking for a quick and easy solution, heavy drapes are a good option, but they should be part of a broader soundproofing strategy for best results.

What About Using Acoustic Caulk?

Acoustic caulk is a specialized sealant engineered to dampen sound transmission.

Although it comes at a slightly higher price point than regular caulk, its sound-blocking capabilities make it a worthwhile investment.

One of the key benefits of acoustic caulk is its ability to remain flexible even after drying, ensuring it maintains its effectiveness over time.

The application of acoustic caulk is straightforward and primarily targets the gaps, cracks, or holes around your window frames and adjacent wall areas.

While it may not completely block out all noise, it does significantly improve your overall soundproofing efforts.

Importantly, if you have any cracks or gaps around your window frames, using acoustic caulk isn’t just an option—it’s a necessity.

Regardless of which soundproofing method you choose, sealing these imperfections in the frame is essential for achieving the best soundproofing results.

It effectively closes the loopholes in your sound barrier, making your other soundproofing investments more worthwhile.

How To Soundproof Windows?

An image showcasing a window surrounded by various soundproofing options. These options, including double-pane and triple-pane windows, window inserts, weatherstripping, DIY window plugs, heavy curtains, and acoustic caulk, are labeled and depicted with icons. This visual guide helps homeowners explore the range of soundproofing solutions available for their windows.

When it comes to soundproofing your windows, you generally have two main options: upgrading your existing windows to double or triple-pane models, or opting for window inserts if a full upgrade isn’t feasible.

Each option has its own set of benefits and considerations, which we’ll explore below.

Option 1: Upgrading to Double or Triple Pane Windows

One of the most effective ways to soundproof your windows is by upgrading to double or triple-pane models.

These windows consist of multiple layers of glass separated by an insulating layer of gas, offering superior sound and thermal insulation compared to single-pane windows.

When you opt for this upgrade, the windows usually come with weatherstripping already installed, eliminating the need for additional sealing.

However, if weatherstripping is not included, it’s advisable to add it for the best soundproofing results.

Regardless of weatherstripping, it’s crucial to seal any cracks around the window frames with acoustic caulk to ensure maximum effectiveness.

Option 2: Soundproof Windows Without Replacing Them (Use Window Inserts)

If upgrading your entire window isn’t an option due to budget constraints or other limitations, window inserts are an excellent alternative.

These are additional acrylic panes that fit into the existing window pocket, creating an extra barrier against noise.

High-quality window inserts from reputable manufacturers or dealers are designed to fit perfectly, with foam around the glass to cover any gaps, making the need for weatherstripping unnecessary.

However, it’s still essential to seal any existing cracks around the window frames with acoustic caulk.

This ensures that you’re not leaving any gaps where sound can penetrate, making your window inserts as effective as possible.

Both of these options offer significant improvements in soundproofing your home.

Whether you choose to upgrade your windows or go for window inserts, don’t forget the importance of sealing cracks around the window frames.

This small step can make a big difference in your overall soundproofing efforts.

How Do I Know If My Windows Are Properly Soundproofed?

An image of a room with a window and various soundproofing measures. A person uses a smartphone app to measure sound levels, with visual indicators showing the effectiveness of soundproofing. A green checkmark signifies effective soundproofing, while a red "X" represents ineffective soundproofing, allowing users to assess the success of their soundproofing efforts.

Understanding the effectiveness of your window soundproofing efforts is vital in achieving that much-desired peace and quiet.

Whether you’ve installed high-end acoustic windows or opted for budget-friendly DIY solutions, gauging the success of your efforts can help you make any necessary adjustments.

How to Quantitatively Assess the Effectiveness of Your Window Soundproofing

An image of a room with a window and a smartphone displaying a decibel meter app. The app provides "before" and "after" sound level readings, enabling users to quantitatively evaluate the effectiveness of their window soundproofing. The comparison shows a decrease in decibel levels after implementing soundproofing measures.

After you’ve applied your chosen soundproofing techniques, the next step is to evaluate their effectiveness.

One of the most reliable ways to do this is by measuring the decibel level before and after the soundproofing.

This provides a quantitative way to assess how much noise has been reduced.

Using a Decibel Meter

In today’s digital age, you don’t necessarily need specialized equipment to measure sound levels.

There are various smartphone apps available that can effectively measure the intensity of sound in decibels.

To assess the effectiveness of your window soundproofing, simply download one of these apps and use it to measure the decibel level in your room before making any changes.

After you’ve implemented your soundproofing techniques, use the app again to measure the sound level under the same conditions.

Comparing the “before” and “after” readings will give you a quantifiable measure of how effective your soundproofing has been.

Although these apps may not offer laboratory-grade accuracy, they are generally sufficient for home use and can provide a good approximation of sound levels.

This cost-effective and convenient method makes it easier than ever to assess the effectiveness of your window soundproofing efforts.

Understanding the Decibel Scale

It’s crucial to understand that the decibel (dB) scale is logarithmic, not linear.

In practical terms, this means that every 10 dB increase represents a tenfold increase in intensity.

So, a noise level of 30 dB is 10 times less intense than a noise level of 40 dB, and 100 times less intense than a noise level of 50 dB.

To put it in perspective, reducing noise by just 1 dB is already a significant change.

In terms of perceived loudness, a reduction of 3 dB is generally considered to be just noticeable, while a 10 dB reduction would make the sound seem half as loud to the human ear.

How Much Do Soundproof Windows Cost?

A visual representation of a window installation mid-process, showcasing double pane and triple pane options, as well as window inserts. The image symbolizes the journey of soundproofing windows, offering alternatives to enhance the acoustic comfort of your space.

If you’re contemplating alternatives to soundproof curtains, you might also be considering the option of soundproof windows.

Understanding the potential costs involved can help you make a more informed decision.

Double pane windows are generally the more cost-effective option for soundproofing when compared to triple pane windows.

The price for double pane windows can vary widely, but they generally range from around $300 to $850 per window.

The cost depends on a variety of factors such as the size of the window, the materials used, and the manufacturer you choose.

On the other hand, if you’re looking for superior soundproofing, triple pane windows are a premium choice but come at a higher cost.

For these, you might expect to spend between $500 to $1,050 per window.

Again, the final cost will depend on the size of the windows, the materials used, and the manufacturer.

Another option to consider is window inserts, which are acrylic or glass panels that are fitted into your existing window space.

These are generally less expensive than replacing your entire window and offer a more budget-friendly alternative.

The cost for window inserts can range from $150 to $400 per insert, depending on the size you require but it usually cost about $30 per square feet.

How Do I Maintain My Soundproof Windows?

An image of a room with a window and a smartphone displaying a decibel meter app. The app provides "before" and "after" sound level readings, enabling users to quantitatively evaluate the effectiveness of their window soundproofing. The comparison shows a decrease in decibel levels after implementing soundproofing measures.

Keeping your soundproof windows in top condition is just as crucial as the initial installation.

Regular checks and preventive measures can go a long way in ensuring that your windows continue to block out unwanted noise effectively.

Whether you’ve invested in high-end acoustic windows or opted for more budget-friendly options, proper maintenance is the key to long-lasting peace and quiet.

How Often Should I Check for Gaps and Cracks?

Regular maintenance is essential to ensure your soundproof windows continue to perform optimally.

One of the most important tasks is checking for gaps and cracks around your window frames.

These can develop over time due to natural wear and tear or changes in temperature and humidity.

It’s a good idea to perform this check at least twice a year, ideally before winter and summer, when temperature changes are most significant.

How Can I Ensure Longevity of My Soundproof Windows?

Maintaining your soundproof windows is not just about identifying problems but also about preventing them.

This includes cleaning your windows regularly to remove any dirt or debris that could affect their performance. Be sure to use non-abrasive cleaners to avoid damaging the glass or frames.

Another important factor is the quality of the installation. Even the best soundproof windows won’t perform well if they’re not properly installed.

Ensure that you hire a reputable installer or, if you’re doing it yourself, follow the installation guidelines carefully.

Proper installation can significantly extend the lifespan of your windows, ensuring you get the most out of your investment.


Soundproofing your windows is more than just a home improvement project; it’s an investment in your peace and tranquility.

Understanding the sources of noise, the types of sound you’re dealing with, and the vulnerabilities of your existing windows lays the groundwork for effective soundproofing.

Whether you choose to upgrade to double or triple-pane windows, opt for window inserts, or employ budget-friendly solutions like weatherstripping and acoustic caulk, each method has its own set of benefits and limitations.

The key is to tailor your approach based on your specific needs and challenges.

Regular maintenance and periodic checks for gaps or cracks will ensure that your soundproofing efforts stand the test of time.

And while specialized equipment like decibel meters can provide a quantitative measure of your success, the ultimate test is your own sense of comfort and well-being in your noise-free sanctuary.

Remember, the goal isn’t to create a completely silent environment but to reduce disruptive noise to a level that allows you to live, work, and relax more comfortably.

Soundproofing is an ongoing process, but with the right strategies and a commitment to quality, you can transform your home into a peaceful retreat from the noisy world outside.


Dominic is the chief editor of the Burton Acoustix blog which writes about acoustics and soundproofing to help readers with their queries and questions they might have with regard to improving any sound or noise issues that they faced in their life.