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.

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 premiumgrade 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

Custom Made. Snug Fit Guaranteed.

Did you know roughly 95% of window frames are out-of-square even if they look perfectly rectangular? Sometimes they’ll slant diagonally; sometimes the sides won’t be parallel.

Because most windows are slightly out-of-square, the vast majority of “out of the box” window inserts available at a hardware store won’t precisely fit your window frames. Those few millimeters of gap create drafts and allow heat and noise to penetrate.

closeup of storm window insert to insulate and block drafts

At Indow, we stand behind every insert we make. Our product comes with a Residential Warranty, which lasts for as long as you live in your home. Our Commercial Warranty lasts 10 years from the date of purchase. Our customer feedback is as good as or better than any storm window reviews – check out some examples at the bottom of the page.


When you fill out our Free Estimate form, you will receive a confirmation email with details about the Indow representative who will assist you with the consultation. Start solving your window problems today by filling out the form below.

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bedroom with window with indow inserts installed for soundproofing in san francisco


Awards & Recognition
indow window portland made collective
indow window dwell
indow window this old house
indow window treehugger
indow window new york times