Acoustic Grade Window Inserts
Window Soundproofing Made Easy
Reduce outside noise from trains, traffic, or your neighbor’s barking dog with acoustic window inserts. Like other Indow grades, Acoustic Grade inserts simply press into existing window frames. These indoor storm windows seal out drafts and save energy, with the added bonus of blocking up to 70% of outside noise.*
With no hardware required, Indow inserts don’t damage the existing window. This makes them a great choice for historic windows, new homes, and rental homes for noise reduction without window replacement. Indow inserts make noise canceling easy without the hassle and expense of installing soundproof windows!
How Do Acoustic Window Inserts Work?
Acoustic Grade inserts are an extra layer against sound vibrations – they are sound deadening storm windows for the interior. The deeper the window frame, the bigger the air pocket between insert and window—the better the performance. All window measurements are entered through our Measure by Indow software, which instantly verifies measurements for a precise fit. Our sound blocking window inserts create a tight seal that block noise entering through cracks.
ACOUSTIC INDOW INSERT + SINGLE-PANE
REDUCE NOISE UP TO 70% (18.9 DBA REDUCTION)
ACOUSTIC INDOW INSERT + DOUBLE-PANE
REDUCE NOISE UP TO 50% (10.2 DBA REDUCTION)
Indow's custom Acoustic Window inserts are:
- Nominal ¼” thick acrylic glazing, double the thickness of Standard Grade.
- Edged in Indow’s patented silicone compression tubing.
- Made in three different colors - warm white, brown and black.
- Available in custom shapes like arches, rounds and eyebrows.
Window inserts for soundproofing are versatile and can be used in a variety of settings such as bedrooms, nurseries, home recording studios, workout/dance/art studios and offices. Establishments such as hotels, churches, yoga studios, government buildings and museums as well as rental property managers have all used Indow inserts to reduce outside noise. To better understand how sound enters a space, check out our home soundproofing guide.
Testimonials About Indow Window Inserts for Sound Reduction
Instead of relying on our word, read what our customers have to say about how our window inserts improved their lifestyle. For example, our client Maggie installed Acoustic Grade in several rooms to block loud traffic noise. The reduction was dramatic, and she loved how she couldn’t even see the inserts.
“It’s made a huge difference,” said Maggie. “Unless you know they’re there, you don’t know they’re there.” Read more case studies like Maggie’s on how we help customers find comfort, quiet and savings in their home or business.
How Indow's Window Noise Reduction Performs:
- Reduces noise by 18.9 dBA (a more than 70% reduction when placed over single-pane windows.)
- Reduces noise by 10-12 dBA (a more than 50% reduction when placed over double-pane windows.)
- STC (Sound Transmission Class) Ratings denote how much noise is blocked by walls, windows and other surfaces. Independent studies have shown Acoustic Grade inserts placed over a double-pane windows yield a STC rating of 42-45.
Noise reduction compared to a single-pane window
50-70%
Indow
25%
Replacement 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
Standard Grade
$31/sf or just $372 for an average window
Our workhorse interior storm window insert blocks drafts and reduces outside noise.
Performance Grade
$40/sf or just $480 for an average window
Our 4 options in performance grade inserts provide superior protection against noise and light.
Commercial Grade
$44/sf or just $588 for an average window
Industrial strength inserts with a scratch-resistant coating can be cleaned with common products.
When you measure your windows, you’ll have help at every step. First, we have a library of video and written tutorials available. Second, our amazing team is always ready to take your call if you need assistance. Third, our proprietary measurement software will automatically check your measurements as you enter them to ensure a tight, snug fit for your customer window inset.
*Sales tax may apply
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Customer Reviews
4.48 Average 1399 Reviews
Fayette V
The inserts provided immediate results for the better. The inserts a virtually invisible which was better than expected. The biggest challenges were getting the accurate measurements which I Dow was helpful with and repositioning the blinds. Everything has worked out. We are planning to do this with other windows
Jamie W
We were excited to receive our Indows, but once we got them in, we were blown away! They match our woodwork almost perfectly. Installing them was far easier than we had anticipated, and we were immediately impressed by the noise reduction, as well as the ability to reduce the impact of the windows on our indoor temperature! Couldn't be more pleased and very excited to be able to add "custom" shapes for the top of our lancet windows.
Mark H
The acoustic indow window worked better than I expected at blocking out noise. The only thing I didn't like was the shipping company (T-Force Freight). The shipping company was difficult enough that I decided to rent a U-Haul and pick it up at their warehouse.
Venkatesh G
Indow solves my noise problem due to highway traffic. I recommend this company for noise reduce solutions.
Thomas R
The process was simple and easy. I was a little nervous having to measure everything myself...but I got the inserts and they fit in our windows perfectly without any hassle. 1000% recommended.
Dan E
As always with internet purchases, I was holding my breath on my recent purchase of inserts! However, everything suggested by everyone I spoke to via telephone, email and text, was verified when I received and installed my inserts!!! Nothing short of phenomenal; fit, sound deadening qualities, (yet to discover energy savings), and customer service is excellent!! I highly recommend this company and product!!
Anonymous
Good quality window inserts. Easy to install. Unfortunately, doesn't do much to block road noise that I was hoping it would help with. Website is clear on the uses so I can't say it was false advertising, just buyer error.
Tommy J
We ordered 4 Indow Window inserts to see how they worked on our steel casement windows. We are very pleased with the fit and finish, and especially the improvement in wintertime comfort. Steel casements present challenging issues when trying to improve efficiency. The only downside for our installation is it required the removal of the locking and operating hardware to work in concert with our window treatments. The attached photo is during installation with Indow inserts installed on the two left pair; not yet installed on the two right pair. Pretty minimal visual difference! I'm now ordering 17 more inserts for the rest of the house.
Catherine L
Our acoustic window inserts have definitely reduced the amount of street noise coming into our apartment. While we can still hear the train as the engines pass by the noise from the train cars is very muted. Likewise we still hear the drunken club patrons yelling, but it no longer seems like they are in the room with us. Our big negative would be that the blinds we enclosed in the space between our single pane and the insert melted and warped within the first week. I don’t think there was any mention in the directions about the possibility of heat build up and potential consequences. That might be good for people to know.
John W
Finally, a solution that doesn't break the bank and allows you to keep your existing windows. We bought ours primarily for additional soundproofing as our builder used dual-pane glass. It makes a measurable difference - 20 dB. The bonus is the insulation value. It's been a mild spring and our main bedroom at the front of the house facing the morning sun is much cooler. I suspect it will be warmer in winter as well. If you follow the self-measure and installation instructions to the letter, they go in easily. We have floor-to-ceiling windows, so we had massive inserts, but it was still manageable for two people.
Jillian G
The measurement process was overly complicated - I understand the desire to get a tight fit into not perfectly square windwos, but a 17 page manual for something you can accomplish with math felt unnecessary. I also found the interface to be a bit challenging to work with when inputting fractions that necessarily had to be rounded but the system didn't like my entry. Otherwise, the inserts themselves fit well, very tight, noticeable noise reduction. I am so satisfied with them that I am considering placing another order (depending on whether I want to also spend the money to change window treatments).
Michael M
What a great option for old homes with drafty windows! Our home's windows are so drafty that the curtains in our bedroom would move/blow when it was windy out. The communication with Indows was excellent, and our questions were answered promptly. We thought the measuring process would be a pain, and we were worried we would not be accurate enough, but the kit they sent along with the instructional videos made it very easy. The Indows were delivered in a large wooden crate, and they made it through shipping unharmed (just some dirt marks on the silicon tubing, most of it came off with Castille soap, but some dark smudges did remain on the white tubing--our only disappointment). Our windows are huge, so we installed the little safety chain provided and inserting them was a 2 person job. There was a little bit of a learning curve with the first Indow, but we can take them in and out fairly easily now. The fit was perfect, and we noticed a difference in the temperature of our home right away. Our house stayed warmer, our furnace ran less, and our curtains are no longer blowing in drafts. The product looks great, and blends right in with our woodwork! We will definitely order more for the few windows we didn't do, and we would recommend this company and product to anyone.
Lisa I
They really work! While I still hear traffic (mostly trucks and motorcycles) normal car traffic is virtually silenced. I'm still not able to sleep in the room because we get so many trucks I am able to use this room as an office space now, which was my goal. This room was once the noisiest room in my house and now I enjoy coming up here to watch tv. Thank you!
Customize Your Insert
Each insert has a tube that edges the clear acrylic. This tubing should blend into your window frame. It comes in three colors: white, brown, and black.
All our acrylic interior storm windows are durable, lightweight and made to blend seamlessly with the surrounding frame. Don't buy new windows. Make the ones you have just right with our precision measuring software, which will ensure a tight fit for your new window inserts. Just choose the grade you need and get started measuring. We're here to help at every step.