Why Soundproof Window Inserts?

Struggling with outside noise from neighbors, construction or traffic? We get it. Here’s a simple, easy-to-install window noise reduction solution. Just press Indow inserts into your window frames – with no mounting bracket – and be amazed at the quiet you enjoy. You’ll sleep better, feel better and enjoy your space more. Noise reducing windows have never been so easy.

Indow insert being installed into window with no tools - better than storm windows
The Best Way of Soundproofing a Window

Our acrylic glazing edged in our patented silicone compression tubing creates a tight seal and dead air space between the insert and your window. Anywhere air gets in, noise can too. To keep the noise outside, we ensure a precise, snug fit by custom making each acoustic window insert using our laser measuring system.

Unlike other solutions, such as storm windows, Indow window inserts don’t require bolting anything to your window frames or walls. This makes them an excellent choice for renters or those with historic homes who want to keep their original windows intact while enjoying the benefits of window soundproofing.

Want to know what it’s like living with noise-cancelling windows? Dan is a customer who filmed and edited this video to show how well Indow sound-deadening storm windows reduce noise.

The Benefits of Indow Window Inserts:

Every grade of Indow window inserts reduces outside noise by at least 50% when placed over an operable single-pane window. Our Acoustic Grade does an even better job, reducing noise by 70%.* (If you have double-pane windows, you must use Acoustic Grade for reducing noise.)

Our Acoustic Grade inserts have extra-thick acrylic at nominal ¼“ (Standard Grade is nominal ⅛”) and block 70% of noise coming through operable single-pane windows and 50% through double-pane windows. They’re easy to install or remove and not only block outside noise, but also prevent inside noise from bothering neighbors.

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Customer Stories
indow window noise solution testimonial - acoustic window inserts
“After moving in, we realized just how busy the street was because it was so noisy we could not sleep at all. Neither could our infant. (The inserts) came on time and were installed so easily, I couldn’t believe it! The difference in sound was unbelievable.”

– Maggie F, Portland, Oregon

Data Driven Results
indow window noise chart - soundproof windows

*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.




What Do They Cost?

Consider the cost and disruption of replacing your windows. A vinyl window averages $66-$87/sf. A wood window averages $71-$109/sf. With Indow inserts averaging between $27-$41/sf MSRP, your window project can cost a fraction of other options.


Standard Grade

indow windows cost for standard grade window insert is $27 per square foot

Our workhorse interior storm window insert blocks drafts and reduces outside noise.

Premium Grades

indow windows cost for premium grade window insert is $36 per square foot

Our 4 options in premium grade inserts provide superior protection against noise and light.

Commercial Grades

indow windows cost for commercial grade window insert is $41 per square foot

Industrial strength inserts with a scratch-resistant coating can be cleaned with common products.

If there’s a dealer near you, a dealer will laser measure your windows and also install the inserts. They will cover all costs in your estimate, which normally includes a measure and installation fee as well as your local sales tax.

Compare To Replacement Windows
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bed in front of window that has Indow window insert


Awards & Recognition
indow window portland made collective
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indow window this old house
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Grade Types

Each grade blocks drafts and reduces outside noises, but our premium grades have special features to make your existing windows work the way they’re designed to while providing additional benefits Click here to read all of our grade descriptions.


We custom make each insert to fit your window frames precisely. Once we have the laser measurements of your window frames, the inserts take two to three weeks to manufacture.

To get a free estimate, fill out the form below.