Measuring For An Estimate
Use a tape measure to measure the width & height of your window frames in inches. Your measurements don't need to be exact for this step - once you're ready to order, we'll provide you with the tools and instructions to get precise measurements and qualify for our Snug Fit Guarantee™ .

STEP 1:
Identify where to place the insert. The best location for your insert will have 5/8" of a flat surface without any obstructions like hardware or blinds.

STEP 2
Measure the width of the window frame and round up to the nearest inch.

STEP 3
Measure the height of the window frame and round up to the nearest inch.
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.
The Right Solution
We offer multiple premium acrylic grades to address a wide variety of window issues, including thermal insulation, noise reduction, UV protection, and much more. Your Fit Specialist will help you choose the right grade for your situation. Just let us know what window problems you’re facing!
Tubing That Blends Right In
One of our favorite things about Indow inserts is that you don’t have to see them to experience the amazing results. They blend right into your windows so well - you might forget they are there!

Brown

Black

Warm White