20 Year Durability Study

Our Fibrex® material windows are not only beautiful, they are scientifically proven to stand the test of time.*

The promises you hear when you replace your windows are only as good as the company that stands behind them. For more than a century, Andersen® products and patents have revolutionized the window and door industry.

As the full-service window replacement division of Andersen Corporation, we are uniquely able to present Renewal by Andersen Signature Service: the perfect combination of a superior start-to-finish process, the best people in the industry, and decades of exclusive product innovation.

It’s safe to say that rigorous testing—both in the lab and in the field—is one of the hallmarks of how we do business.

Beauty Backed by Science

Recently, we pulled a batch of our original windows from the home they had been installed in more than two decades ago.** That’s more than 20 years of extreme Minnesota weather—bitter, brutal winters; hot, muggy summers.

And what did we find? After all those years of enduring Mother Nature’s mood swings…they passed our battery of performance tests with flying colors. After two decades in a real family home, facing real weather…they still looked brand new, and they still opened and closed as easily as the day they were installed.***

A Lot Can Change in 20 Years…Your Windows Shouldn’t.

20 year test result chartWhat do these testing results mean to you? 

  • It means you’ll get an exclusive window-replacement product that is durable, customizable, and beautiful.
  • It means you will have windows that stand the test of time—and are backed by our robust, fully transferrable, limited warranty.*
  • It means you’ll get an outstanding window worthy of the Andersen name and reputation—and backed up by our promise to stand by our product, today, tomorrow, and years into the future.*

 Call or schedule a free in-home consultation today to learn more about our windows.


*See the Renewal by Andersen limited warranty for details.
**Based on testing of 10 double-hung units 20 years after installation
***Testing per ASTM E2068



Our Fibrex material windows are not only beautiful, they are scientifically proven to stand the test of time.* 
Schedule a Consultation

Ready to Start Your Project?

Schedule a free in-home window and door consultation today.
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$330 Off Each Window and $725 Off Each Door*

PLUS 12 Months $0 down, 0% interest, and $0 monthly payments*

Offer ends 07/31/2021

Minimum purchase of 4. Interest is billed during the promotional period, but all interest is waived if the purchase amount is paid before the expiration of the promotional period.


Happily Married couple talking to a sales rep at Renewal by Andersen during their virtual consultation
Step 1

Design Consultation

Our design consultants provide in-home or no-contact virtual meetings to listen to your design needs and provide a plan to improve your home.

Our Hassle free process step 2 - MEASURE & MANUFACTURE
Step 2

Measure & Manufacture

Project Technicians ensure accuracy and answer any last minute questions before sending in the order for your fully customized windows.

Our Hassle free process step 3 - INSTALLATION
Step 3


Our Installers treat your home as if it were their own and clean up afterwards.

Our Hassle free process step 4 - CUSTOMER CARE
Step 4

Customer Care

A robust limited warranty is backed by a commitment to making sure your windows function as expected.