Soundproofing Window Inserts – Fact or fiction?

Loud neighbors, traffic noise, and other unwanted sounds can easily penetrate through windows which can disturb your peace and quiet at home.

Soundproof window inserts might just be the right solution you’ve been looking for. These noise-reducing devices are not only affordable but also easy to install, making them a convenient alternative to costly window replacements.

In this comprehensive guide, I will introduce you to the remarkable benefits of soundproof window inserts, discuss their effectiveness in reducing noise, and offer valuable tips to help you choose the right inserts that suit your specific needs.

Understanding Soundproof Window Inserts

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A window insert installed in an existing window frame

Soundproof window inserts are an affordable and efficient solution for minimizing outside noise in your home or office. They are one of the most effective window soundproofing solutions (check out my guide).

These innovative devices are laminated glass window treatments designed to create an effective barrier against sound waves.

With the right soundproofing window inserts, you can enjoy a more peaceful environment without having to invest in costly replacement windows or other soundproofing methods.

But do soundproof window inserts really work, and what makes them so effective? Let’s dive deeper.

Do soundproof inserts really work?

The effectiveness of soundproof window inserts lies in their ability to block sound waves, preventing them from entering your space.

These inserts create an air gap between the insert and the existing window, forming an insulated sound trap that absorbs, reflects, and cancels sound waves.

In fact, the PrivacyShield® Window Seal Kit has been proven to reduce exterior noise by up to 80%, with a remarkable STC (Sound Transmission Class) rating of 49.

There will be a noticeable difference in noise levels but it’s important to note that the soundproofing effectiveness will depend on various factors, such as existing windows, walls, ceilings, floors, and doors.

A crucial aspect of ensuring maximum noise reduction is the accurate fit of the soundproof window insert. A custom fit will help eliminate any gaps that may allow sound to pass through, providing you with the tranquility you desire.

Components of a Soundproof Window Insert

The primary components of soundproof window inserts are laminated glass and silicone tubing.

Laminated glass consists of two sheets of glass with a layer of plastic interposed between them. This plastic layer enhances sound reduction, making them more effective in blocking outside noise.

The silicone tubing helps create a tight seal around the window frame, ensuring optimal soundproofing performance.

Together, these components provide a highly efficient barrier against unwanted noise, making your home or office a more peaceful and enjoyable space to be in.

Sound Transmission Class (STC) Rating

The Sound Transmission Class (STC) rating is a crucial factor in determining the effectiveness of soundproofing window inserts. Check out my comprehensive guide on STC ratings.

It measures the ability of a building partition, such as a wall or window, to attenuate airborne sound. A higher STC rating indicates better sound isolation, as less sound will be able to pass through the partition.

When selecting an STC rating for your soundproof window inserts, it’s important to consider the type of noise you’re trying to reduce. For example, if you’re attempting to minimize traffic noise, you’ll need a higher STC rating than if you’re trying to block noise from a neighbor’s television.

By understanding the significance of STC ratings, you can make an informed decision when choosing the right soundproof window inserts for your specific needs.

Benefits of Using Soundproofing Window Inserts

A double pane window with soundproof window insert installed

Soundproof window inserts offer a range of benefits beyond noise reduction. They’re not only a cost-effective way to soundproof windows, but they’re also easy to install and maintain the aesthetics and natural light of your home.

Let’s explore these benefits in more detail.


One of the main advantages of soundproofing window inserts is their cost-effectiveness.

Soundproofing windows by replacing them with double-pane windows or triple-pane windows can be an expensive endeavor, with costs ranging up to $109/sf.

In contrast, soundproof window inserts typically cost between $250 and $500 per insert, making them a more affordable alternative.

Moreover, the cost includes everything from measuring to installation, ensuring a seamless process without any hidden expenses. By investing in soundproofing window inserts, you can soundproof your windows without breaking the bank.

Easy Installation

Another benefit is their ease of installation. Designed to fit into existing window frames, installing window inserts can easily be done without the need for any additional tools or materials.

In fact, most soundproofing window inserts can be installed within a day, making it a quick and hassle-free solution to your noise problems.

Furthermore, many soundproofing window inserts, such as Indow inserts, can be installed independently, allowing you to complete the installation process at your own convenience. This not only saves you time but also reduces the overall cost of soundproofing your windows.

Here is a handy installation video guide.

A guide on installing soundproof window inserts

Aesthetics and Natural Light

Soundproofing window inserts also offer aesthetic benefits. Unlike other soundproofing solutions, such as heavy curtains or bulky furniture, these inserts preserve the appearance of your window frame while still providing effective noise reduction.

This allows you to maintain the overall look and feel of your home without sacrificing soundproofing capabilities.

Additionally, they are transparent and do not obstruct natural light. This means you can enjoy a well-lit space while still benefiting from the noise reduction provided, creating a more comfortable and inviting environment.

Additional Benefits of Soundproof Window Inserts

In addition to their noise-reducing properties, soundproof window inserts offer several other benefits, such as thermal insulation and privacy protection.

These additional advantages make soundproof window inserts an even more appealing solution for homeowners seeking to improve their living environment.

Thermal Insulation

Soundproof window inserts provide thermal insulation by adding an extra layer of material which helps to reduce heat transfer and increase energy efficiency.

This thermal insulation can result in energy savings for heating and cooling, making soundproof window inserts an even more cost-effective solution.

Not only do they help keep your home quieter, but they can also help you save on energy bills by reducing the need for heating and cooling systems to work as hard to maintain a comfortable temperature.

Privacy Protection

Soundproof window inserts also offer enhanced privacy protection. By blocking sound from entering or exiting a room, these inserts make it difficult for others to eavesdrop on conversations and create a secure environment.

This privacy protection is especially beneficial when sensitive information is being discussed, such as in a home office or a medical clinic. By installing soundproof window inserts, you can ensure that your conversations remain private and confidential.

Choosing the Right Soundproof Window Inserts

With so many options available, it can be overwhelming trying to choose the right soundproof window inserts for your needs. To make an informed decision, consider the size and type of window you have, as well as the desired level of noise reduction.

Laminated glass soundproof window inserts are generally more effective in terms of sound reduction, but it’s important to weigh the benefits and drawbacks of each option.

Additionally, consider the installation process and whether you prefer to install them yourself or hire a professional installer.

By thoroughly evaluating your specific needs and preferences, you can select the most suitable soundproof window inserts for your home or office, ensuring a peaceful and comfortable environment.

Installation Tips for Soundproof Window Inserts

Proper installation of soundproof window inserts is crucial for achieving optimal noise reduction.

Here are some tips to ensure a successful installation:

Proper Measurement

Accurate measurement is essential to guarantee that the soundproof window inserts fit snugly and efficiently block out noise. Indow’s proprietary measurement software, for example, automatically checks measurements to ensure a precise and secure fit for the window insert.

By taking the time to carefully measure your windows, you can ensure a successful installation and effective noise reduction.

Sealing Gaps and Cracks

Caulkto seal gaps and cracks in Windows

Sealing gaps and cracks around your windows is another important aspect of a successful installation. Use caulk, foam sealant, or weatherstripping to eliminate any small gaps between the wall and the window borders, reducing the sound transmission.

By following these installation tips and selecting the right soundproof window inserts, you can effectively block out unwanted noise and enjoy a more peaceful and comfortable living environment.


In conclusion, soundproof window inserts are an effective and cost-efficient solution for reducing outside noise in your home or office.

These innovative devices can significantly improve your living environment by blocking out unwanted noise. With proper installation, you can enjoy a peaceful and comfortable space, free from external noise disruptions.

By understanding the various types of soundproof window inserts, their benefits, and the factors to consider when choosing the right inserts for your needs, you can transform your home or office into a quiet sanctuary, allowing you to focus on what truly matters.

Don’t let external noise disrupt your life any longer—invest in soundproof window inserts today and enjoy the tranquility you deserve.

Frequently Asked Questions

Do window inserts help with noise?

Yes, window inserts can soundproof your windows to a large extent. Window inserts are designed to block out unwanted external sound waves, and installing glass panels about five inches in front of the interior face of a window helps create an effective sound barrier.

What is a soundproof window plug?

Soundproof window plugs are effective sound blockers that you can cover the entire window. They help block out sound, both internally and externally, by utilizing materials designed to absorb, reflect, and insulate the space.

How can I soundproof my apartment windows?

To soundproof windows in your apartment, you can install soundproofing window inserts, noise-reducing curtains or blinds, use carbon absorption panels, attach external storm windows, replace single-pane windows with double-pane windows, and seal gaps along windows with acoustic caulk. These cost-effective solutions will help reduce and absorb unwanted noise coming from outside.

Do window inserts help with noise?

Yes, window inserts can help to reduce noise levels and soundproof your windows. They are specially designed to reduce sound transmission and can provide an effective acoustic barrier when installed correctly.

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