How it Works

We make custom window inserts based on laser measurements of every window opening and ship all over the U.S. and Canada. We have both dealers and a direct sales program depending on where you live. Our laser-measuring system is easy and allows us to offer you our Snug Fit Guarantee(™). But the whole process starts with an estimate, so you know how much our custom storm windows are going to cost before you decide to move forward.

Measuring for an Estimate on Custom Window Inserts

Getting an estimate is simple. It involves measuring all four sides of your window using a tape measure. Check out this illustrated graph:

window insert installation


Some windows have more than one frame step, shown above in blue and yellow. Identify the best frame step to install the insert.


For the inserts to fit there must be at least 5/8″ of flat space all the way around. Measure width and round up to the nearest inch.


The frame step must be unobstructed by window hardware or blinds. Measure the height and round up to the nearest inch.


Once you send in these rough measurements, we’ll let you know the cost of getting Indow inserts made for your windows.

If you have an odd-shaped window or an especially large window that needs a mullion, we will work with you to find the perfect solution.

Working With a Representative

Once you decide to move forward, you’ll work with an Indow representative who can explain and help every step of the way. They’re knowledgeable about windows and can answer any questions you may have.

Picking the Right Grade and Colors

There are a range of grade types to choose from to make your windows work just right, whether it’s blocking UV light, increasing privacy or reducing noise. You can also choose from three tubing colors so the inserts blend into your window frames.

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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

Laser measuring

Over time houses settle, making most windows out-of-square, sometimes imperceptibly. It’s important to laser measure each window opening so the inserts fit precisely, ensuring a near-airtight seal. This snug fit is what helps our inserts do a superior job of blocking drafts and noise.

indow insert how to order

Our laser measuring process is easy-to-use and designed for minimal error. Once the dimensions are uploaded to our proprietary system, we can quickly tell if there’s an error and a need for remeasuring. But don’t worry: we offer our Snug Fit Guarantee. You can be confident your inserts will fit and perform well.

How long?

You will receive the Laser Measuring Kit via USPS Priority Mail. We ship the kit the same day that your order is created, or next day depending on the time of day. Delivery is typically within 2-3 days of shipment. Typically, it takes 2-4 weeks to produce your Indow inserts after we receive your Order Confirmation and final payment. This is not a guarantee and is subject to fluctuation based on current demand and material supply.

To get started on blocking drafts and noise, fill out the form below:

Get A Free Estimate
bedroom with window with indow inserts installed for soundproofing in san francisco


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