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The Indow Standard Grade interior storm windows are an innovative, cost-effective way to block drafts and noise to make your home comfortable and energy efficient. We designed these inserts to help your existing windows perform like new double-panes all while blending into the frames so they’re nearly invisible. They install in seconds without disruption or mess.
Unlike conventional interior storm windows, our indoor storm windows press inside your existing window frames without a damaging mounting bracket. Save money on energy bills while keeping your original windows to preserve your home’s character and value.
Nominal ⅛” thick acrylic glazing.
Edged in our patented silicone compression tubing.
Made in three different colors - warm white, brown and black.
Available in custom shapes like arches and rounds.
Because houses settle, most windows aren’t square. At Indow, we laser measure every window opening and then custom make each insert, ensuring a precise, snug fit for an airtight seal that blocks drafts. That compression is also what holds the insert in place.
The window inserts blend in and can’t be seen from the exterior of the house, so don’t violate historic district guidelines. People with newer double-pane windows use Indow inserts to enhance their performance.
Standard Grade inserts are suitable for any room. Some homeowners start by installing inside storm windows in their draftiest space and over time buy inserts for the rest of their home.
Instead of replacing the historic windows in his home, Kester installed Indow Standard Grade interior storm window inserts. He immediately improved the performance of his windows.
“What attracted me to the Indow window insert product was that you don’t mess with your house at all. You just press the inserts into your window frames. There’s no mounting bracket. They’re fitted perfectly to each window so it’s just the pressure gasket that allows you to insert it into the window. They’re light and easy to install and remove again and again.”
For partners Greg and Eddie, using Standard Grade eliminated condensation in their mid-century modern Texas home. But Indow inserts are versatile. For a slightly higher price, our specialty grades offer an impressive array of solutions for the myriad challenges posed by windows whether it’s the need to block sunlight or UV rays or create privacy or quiet.
“I couldn’t be more pleased,” said Greg. “The Indow inserts have a very low profile.”
Saves up to 20% on energy, whether winter heating bills or summer air conditioning.
50 percent noise reduction (10-12 dBA) when placed over single-pane windows.*
Acoustic Grade is the best option for quieting outside noise and will achieve a 70 percent noise reduction (18.9 dBA) when placed over single-pane windows.
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 custom window insert.
*Sales tax & shipping charges not included. Shipping charges vary by region and order size – talk to a Fit Specialist to get our best pricing.
average percentage saved on heating & cooling bills
20%
30%
15%
INDOW
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.
You're one step closer to creating more comfort & quiet in your home.
We value safety and privacy. We will never share, sell, or rent your data to third parties not directly related to your purchase or consideration of our products. Read our full policy here.
Indow has insulated more than 23,000 buildings - helping reduce carbon emissions by nearly 200,000 tons - and creating comfort across the US & Canada!
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.
I appreciate everything about the whole Indow window process.
Scheduling and holding a consultation online was easy and seamless. I consultant with KAYA, and he provided a thorough easy-going no pressure to move forward until I was ready consultation.
Incentives were clearly outlined if I decided to move forward and order to be able to make my inserts even more affordable if I acted in a timely manner with measuring and submitting my order as well as returning the measure kit.
The Indow inserts arrived within the expected timeframe and installing them was very easy. One of my favorite parts was watching how to install video, because they used humor, and it really held my attention and put me at ease, allowing me to take in all the little details I needed to insert my Indows correctly.
Within hours, I noticed a temperature shift in the room. It was cooler and more comfortable. The next day when I worked in my office with the Indows the landscaper was across the street with the leaf blower and there was considerable reduction in noise making it a low background buzz instead of a disturbance to the work I was doing. I’ve only had them installed for three weeks and I’ve been so happy with them. It was a great investment for that room in the house that I use for my office.