Soundproof Your Home: Window Inserts & The Basics

Soundproofing windows depends on how sound is coming into your home and what noise is disturbing you. Soundproof windows work against traffic noise, barking dogs, & noisy neighbors – and they do this with window insulation. Soundproofing window inserts provide inside window insulation that both reduces and absorbs sound. Find out if they'll work for you:

Simple soundproofing window tricks by blocking noise from entering.

Sound Reduction

shows graphically how reduction occur

Sound Absorption

shows graphically how absorption takes place inside an indow window

Types of Window Soundproofing

Sound Reduction — Decreasing noise from its original level by blocking it. Sound-reducing products prevent noise from entering a space.

Sound Absorption — Decreasing noise from its original level by stopping its movement within a space. Sound-absorbing products stop noise from bouncing off surfaces.

How to Increase Sound ReductionHow to Increase Sound Absorption
Seal gaps in window (caulk, weatherstrips) Add furniture
Sound-dampening curtains Hang acoustic panels
Install sound-reducing blinds Lay plush rugs
Install interior storm window inserts Purchase plants

Now that you know the difference, decide whether you need sound reducing or sound absorbing products.
Don't know which product you need? Noise generated outside calls for sound reducing products to stop noise from traveling through windows, ceilings, doors, and walls. Noise generated inside requires sound absorption products to reduce echo.

If outside noise is your issue, Indow is here for you. Noise travels via vibrations in the air and insulating, air sealing inserts block that noise from entering your space. Can't decide? You may need both.

Indow products can be used to block outside noise from entering while sound absorbing materials inside can minimize reverberation. Keep in mind, sound reducing products, like inserts, will provide a more noticeable difference in noise than sound absorbing products.

Learn more about the two types of soundproofing and soundproofing materials

Diagram of a soundproof window with original glass and acrylic acoustic insert.

How to Soundproof a Window with Inserts

Installing window inserts is an easy and effective way of soundproofing windows. Indow Acoustic Grade window inserts can reduce and cancel noise – up to 70% of outside noise when placed over single-pane windows and up to 50% of noise coming through double-pane windows. In an office or home, soundproofing windows is easy with our inserts that press into your existing window frame—no hassle, nails, or adhesives required. But how much does it cost to soundproof windows?

Woman installing Indow insert for the simple soundproofing in windows.

Indow inserts are edged with silicone compression tubing to create a seal for your soundproof window. Getting an exact fit is essential in soundproofing a window, since gaps and spaces allow sound to seep inside. This precise fit also creates a more comfortable, energy efficient space while the low profile practically disappears into your window frame. Our custom-made inserts offer simple soundproofing for any window shape.

Watch this 2 minute demo by window expert, The Craftsman Blog:

*We want to ensure our inserts help solve your noise problem. Overall noise reduction depends on the amount of noise coming through your walls, ceilings, floors, doors, and existing windows. Noise reduction will be less when placed over double-pane windows. Read our full Noise Reduction Sheet to learn more.

Sound Absorbing Treatments

Despite your best room soundproofing efforts, the sound that does penetrate can be absorbed once it's in the room to minimize reverberation. It's best to avoid minimalist style of exposed brick and wood floors. Consider hanging Acoustic panels. Also, plush rugs with sound dampening rug pads, wall hangings, upholstered furniture and plants will help absorb sound.

Indow Inserts Are Featured In:

Indow inserts are featured in: The New York Times, Wired, Popular Mechanics, Bloomberg, Treehugger, Sunset, This Old House, Dwell, KGW8

“Indow significantly improves insulation and leakage, as well as noise reduction.”

-RD Gentzler, Architect
House Beautiful, How to Soundproof Your Windows Without Actually Renovating

Customer Reviews


4.49 Average 1423 Reviews logo

Charles T

Working with Indow has been a great experience from start to finish. They answered all our questions & guided us through the whole process. We ordered 15 inserts & they have reduced the Highway noise that we were experiencing after buying our house. A great product & innovative company.

Posted 1 day ago

Sue W

I live 20 feet from a busy road with lots of trucks. We almost didn't buy the house because of the noise. my house is the perfect candidate for indows. After installing them (myself. .. directions were so easy) we can barely hear any trucks noise at all. Indies live up to their claim and has made a huge difference.

Posted 2 days ago

Richard H

I am very pleased with the noise reduction and heat-trapping effects of my Indow inserts. I bought three small inserts as an experiment for the noisiest part of the house all year round, and where it's cold in winter. They have done beautifully well in sealing out both noise and heat. My only issue has been to get one of them installed perfectly straightly on one side, but it was done in a difficult location and isn't that important. They are also quiet expensive, but I may get a federal tax rebate on them.

Posted 6 days ago

Hee D

It could have been better if the pallet was collected after the delivery. Also the inserts are more beneficial for picture/fixed windows rather than open windows. The price of insert are expensive.

Posted 1 week ago

Larry S

I was pleasantly surprised how well the appearance after installation, perfectly clear, plus reduce the noise from the outside more than I expected. I would definitely recommend anyone looking for noise reduction to consider these. I will be purchasing more as time goes on, thank you Indow

Posted 1 week ago


Called about price $1000.00 For 2 small windows asked about energy savings? They said no guarantees depending on location and almost other factors, why would I spend that money w no guarantees

Posted 1 week ago

Christie R

It has cut down noise tremendously and is definitely more efficient with keeping our cooling in and heat out this summer.

Posted 1 week ago

William U

Indow is a trendsetter in eCommerce. They make the entire process of ordering, purchasing, and installing their product very easy for any walk of life; and, their communication processes are excellent. The inserts I purchased and installed were just as described. They are effectively blocking soundwaves, but not vibration, which was discussed during my initial call with an Indow Representative. I would recommend Indow window inserts to a friend.

Posted 1 week ago


Our window inserts have decreased road noise in our bedroom by 75 percent which we are very pleased with. The whole process was extremely simple and organized. Everyone we dealt with was professional and helpful. The inserts were simple to install and I would recommend to others.

Posted 2 weeks ago

Jeanne S

They make it easy to measure and install and it does reduce the noise as I live next to a busy highway. I am happy with the purchase.

Posted 3 weeks ago

Ivan L

We have a multi-story building construction next block that starts at 7 a.m. daily and a busy street a few blocks away. Before the insert was in place in our bedroom, we heard every piece of construction equipment there, including the obnoxious beeps from vehicles backing down in the lot, and all of the emergency vehicles passing by on the avenue. Now, this sounds like something happening twenty blocks away, barely noticeable. This is a huge quality-of-life improvement from day one of the insert installation.

Posted 3 weeks ago

Stan B

All fit as planned and are good

Posted 3 weeks ago

Cassie M

Overall very easy process from ordering to install. Was just hoping that the sound dampening would have been a little better.

Posted 3 weeks ago

Dan C

Effective and frequent communication from Indo Window starting with the order process, through production and post-delivery. The insert fit was excellent, fitting snuggly. The panel is quite effective in reducing noise. My wife was sleeping in the basement due to traffic noise. She is able to sleep in her bedroom again. Overall an excellent experience!

Posted 1 month ago

Lynett P

Great product. Arrived a bit dirty.

Posted 1 month ago

Let Us Help You

bedroom with window with Indow inserts installed for soundproofing in San Francisco


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