Do you have any arched, round or eyebrow windows? If they’re drafty, or if you need to create privacy or filter light, unusually shaped windows can prove challenging. It’s hard to find a replacement for unusually-shaped windows. And most storm windows come in squares and rectangles, nothing like the odd-shaped window that makes your house look so unique.

If you have an especially large window, you may need to introduce a mullion, which will divide your insert into more than one segment.

indow window solutions special shapes

Indow’s custom-shaped window inserts are the perfect solution for blocking drafts in uniquely shaped windows. They can be cut to fit any form. Round, oval, batwing – you name it – Indow can create a specialty-shaped window insert that will block drafts and noise. Customize them further by getting them made in Privacy Grade to obscure what’s happening within or Museum Grade to filter damaging UV light, all without distracting from the window’s unique beauty.

Custom Geometry Production Sold Out for 2022

Due to high customer demand, combined with staffing and inventory shortages, we have sold out of production spots for our special geometry windows in 2022. Please contact us if you would still like to get pricing information and to sign up for our waitlist. We will update this page when production slots become available.

indow window solutions special shapes

How do we do this? It’s a simple process that starts with tracing the window onto a piece of paper. You can read more about how we make odd-shaped window inserts here.

indow window solutions special shapes

Make Your Specialty-Shaped Window Inserts Just Right

There are a range of insert grades to choose from to make your unusual windows do what you need them to, whether it’s blocking UV light or reducing noise. You can also choose from three tubing colors so the inserts blend into your window frames.

Grade Types

Each grade blocks drafts and reduces outside noise, but our premium grades have special features to make your existing windows work just right. Click here to read about all the different grades.


The tubing comes in three colors:

indow window brown compression tubing


indow window black compression tubing


indow window white compression tubing

Warm White

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



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.

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 $31-$44/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.

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