Comfort, Soundproofing, & Energy Efficiency Solutions

The Best Way to Insulate Windows

Want to know how to insulate windows? Indow inserts are an easy, immediate, reversible solution to: cold drafts, noise, hot summer air, and fading hardwood floors. Indow uses precise laser measurements to create custom inserts.

Every insert fits your window precisely – even if your window is odd-shaped. We use durable acrylic panels, which insulate better than glass, surrounded by compression tubing so inserts fit snugly in place. This combination is the best way to insulate windows. Indow inserts don’t just insulate against drafts and noise. You can choose privacy or UV protection. Look through our solutions below to find the best window inserts for your needs.

Drafts & Savings

Indow insulating windows.

The best way to insulate windows against cold, summer heat, and save on energy bills.These inserts seal out drafts, insulating windows against cold while providing some noise reduction.

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Noise

Indow insulating windows

Our acoustic panels insulate against drafts and have increased noise reduction abilities. These inserts are insulating windows against outside noise to create a quiet, more soundproof environment.

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Lights & UV

Indow insulating windows.

In addition to insulating windows, our these inserts obscure light for privacy, block UV light for protection, or completely blackout a room for a dark, quiet sleep environment.

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All Products

Indow insulating windows.

All custom-made Indow inserts are great at insulating windows against drafts and noise. Different grades have additional insulating powers. See all our grade types to find the best window inserts for your situation.

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  • Popular Mechanics
  • Dwell
  • This Old House
  • Treehugger
  • The New York Times
Indow window insert compression tube color samples.

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.

Insulating Windows is Easy

Indow window insulation inserts are custom made to fit your window perfecty. When they arrive, all you have to do is press them in to place to start insulating your windows. Our window inserts install in minutes with no mounting hardware. And depending on their size, you only need one person to put them in place.

Man installing window insulation inserts.

How to Insulate Windows with Indow Inserts:

  • Acrylic panels insulate against cold better than glass
  • Silicone tubing creates an almost airtight barrier because of its compression abilities
  • Dead air space between the acrylic panel & the glass adds more insulation
  • Dead air space & acrylic also insulate against noise

All of this means saving money from lowered energy costs. By insulating windows with our inserts, you also preserve your existing windows. The inserts press inside your window frame with no construction needed, ready to insulate immediately.

Customer Reviews

Excellent

4.49 Average 1494 Reviews

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Paula S

From start to finish, we were very pleased with our rep, Reed, and the other staff at the PDX will call! The inserts themselves are stupendous! We purchased six total for the noisiest, road side(s) of our home. The outcome was beyond our expectations! Not only did the three rooms that bordered the road become at least 70% quieter, the other end of our home did as well! I cannot recommend Indow inserts more! The technology makes sense to add the inserts rather than purchasing new windows. Great results and thank you! Paul and Paula Spilsbury

Posted 4 weeks ago

JD

Brian was very helpful & informative. He helped me order the correct windows for my needs. They were shipped with the utmost of care & arrived ahead of schedule. Ultimately, the Indow Windows have been very helpful in muffling unwanted noises & they have helped save on our energy costs. Thank you, Indow Window!

Posted 1 month ago

Cynthia M

Very happy with the reduction in noise. Easy to install and use. Great customer service.

Posted 2 months ago

Juli E

We are thrilled with our Indow window inserts! I'd been on the lookout for a more permanent solution to leaky windows in our third floor living space. I discovered Indow on social media but since then have learned of friends who'd had Indow recommended to them by their rennovation contractor. The entire process went smoothly with friendly reps at hand to talk through questions during measuring, etc. They fit perfectly and help us to maintain the beautiful design of the windows on our 100 year old home! Highly recommend!!

Posted 3 months ago

Jen F

Worth the money!

Posted 3 months ago

Elizabeth H

For townhouse living, this solved my problem with noise from my neighbor's with my kitchen window. A considerable decrease of noise indeed! Measurements were a bit frustrating so I recommend using a laser measurement device and following directions to use a string for the diagonal. They look great and were easy to push into place. I highly recommend as an alternative to buying a new window.

Posted 4 months ago

Anonymous

Easy to install, and instantly stopped drafts and dampened outside noises very effectively!

Posted 4 months ago

Robert C

The process could've been smoother with the sending of the measuring kit. There was a delay with weather in Oregon but then it felt like my kit was still delayed due to other reasons. Most new homes (like mine) have textured paint and it can also be inside your window frames. I measured everything out but I still have little tiny gaps due to the texturing. Not indows problem but just be aware you made need to sand or fill in those gaps yourself to get a perfect seal. I did the acoustic grade inserts and they have reduced some noise but they will not completely block or significantly reduce road noise. This is most apparent with deep or lower frequencies like truck exhausts or modified street racing cars that are quite popular these days. Taking the inserts out to open your windows isn't an easy task. The little metal hook they provide needs to be either bigger or you can attach something to it as a way to leverage yourself. Overall the process was average. I think they're definitely a good option for weatherproofing and some sound reduction depending on the type of windows you have. I would purchase again.

Posted 4 months ago

Shelley C

The process for ordering and installing the Indow Widnow inserts was so easy. They sent the measuring information and it had great instructions. The inserts were delivered by UPS was crushed on one corner, but the company had packed them well, so there was no damage. We installed them the same day. It works best if you have two people completing the installation. We felt the results immediately and are glad we spent the money to make our home just a little more efficient.

Posted 4 months ago

Barry B

The insert fits like a glove and insulates the window! No more frost and condensation on the interior of the window! Thank you for an easy, effective and attractive fix!

Posted 4 months ago

Susan A

The support during the entire process was wonderful, thank you so much for the extra quiet space!

Posted 4 months ago

Volodymyr R

Very good good quality. Overall very satisfied with this product and service. Thanks

Posted 4 months ago

Jane H

Our home was built in 1913 and has beautiful old wavy glass single-paned windows. I’m so glad we were told about Indows and didn’t have to replace the original windows. We live in Canada but had no difficulty placing the order and were very impressed by how accurately the company met its deadlines, including cross border delivery. The Indows inserts blend in perfectly with our home and the existing window frames. You don’t see them unless you’re actually looking for them. But what we did notice was how much warmer the rooms feel the minute the inserts were installed! I can’t speak to any heating bill savings because they just went in this week, but our home feels much, much cozier. Our contractor who took all the measurements and installed the Indows says: “Excellent instructional videos: clear and informative. Very impressed with the design and the product. Overall, the ease of installation is quite impressive. Working with all the staff at the company was great – everyone was very helpful.” I’m already recommending this company to any of my friends who live in drafty older homes and want to reduce their heating/cooling bills and do some good for the environment.

Posted 5 months ago

Anonymous

Don't be afraid of buying an older home with single pane windows. This company has you covered. Their inserts are super high quality and fit well thanks to the laser measuring kit they send. Highly recommended!

Posted 5 months ago

Katie M

We purchased three Indows to reduce drafts and noise in our bedroom, which faces the street. The improvement was immediate. Our house was built in 1958 and although we have exterior storm windows we didn't want to replace the windows outright due to cost and architectural consistency. These were an excellent solution.

Posted 5 months ago

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