Indow window inserts block drafts, reduce noise, and save on your bills. We’ve made tens of thousands since opening for business, and we’re proud to offer a premium, custom-made, & high-performance product for an accessible price.

Indow pricing is by the square foot and the grade type you select. Indow makes three high-performance window insert grade types. Each provides special benefits and all press into place without the disruption or added cost of construction.

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 $30-$43/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.

Performance Grades

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

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

Commercial Grade

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

Industrial strength insert 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

Compare To Replacement Windows
Better Than Your Average Window Insert

Custom Made. Snug Fit Guaranteed.

Our proprietary technology ensures a perfect fit whether you have odd-shaped windows or out-of-square windows. Unless you have a new house, your windows aren’t perfectly square (and even that doesn’t guarantee it). Homes settle, and create slanted windows—even if the window looks rectangular.

This is why most “out of the box” window inserts available at hardware stores won’t fit your windows. Even if they seem to, a few millimetres gap allows drafts and noise to penetrate.

closeup of storm window insert to insulate and block drafts

Aren’t They Just Plastic?

We use high-quality acrylic and silicone to build an insert that creates an air seal and has better optical clarity and thermal properties than glass. Our acrylic doesn’t yellow over time, and our silicone doesn’t lose its spring force—even exposed to the sun.

Watch this video to learn more about Indow pricing and the construction of our inserts:


Indow Inserts vs Replacement Windows

  • Compared to full replacement windows, Indow inserts cost on average 75% less than wood & 50% less than vinyl.
  • Instead of ripping a hole in your wall, simply press an insert into place.
  • Meet historic guidelines with an insert that practically disappears vs thousands of dollars on replicas.

See a full comparison of window inserts and replacement windows:

Compare To Replacement Windows

Other Add Ons

Odd-shaped windows can be accommodated with special geometry window inserts for an added 25%.

Large windows, up to 6’ x 8’ or 5’ x 10’ do not require mullions. Windows larger than that do require mullions with the insert split into smaller panels.

woman installing Indow insert in window to create compression seal

Guarantee & Warranties

All window measurements are checked by our software and window experts before the first cut is made. Because of this, our inserts come with a Residential Warranty, which protects your investment for as long as you live in your home. Our Commercial Warranty protects your investment 10 years from the date of purchase. Our Snug Fit guarantee is included in all self-measure orders.

Included in your order is: a cleaning kit, care guide, & installation support with a dedicated case manager in the event of an issue.


Customer Reviews


How Much Will My Indow Insert Cost?

Fill out our Free Estimate form. That will connect you with an Indow representative to work out the details of your project and provide an estimate. They are incredibly knowledgeable and will let you know if Indow is the right choice for you.

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Awards & Recognition
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