What is Fibrex® Material?

Our revolutionary Fibrex® composite material combines the strength and stability of wood with the low-maintenance features of vinyl.


Innovation has been a hallmark of Andersen Corporation since its founding in 1903. Andersen implemented “mass production” techniques in 1904, produced the first completely assembled window unit in 1926, and became the world’s largest specialized window frame factory in 1929. Our guiding principle has always been to “make a product that is different and better.”

One of our most innovative ideas is Fibrex® material. This revolutionary composite combines the strength and stability of wood with the low-maintenance features of vinyl. Today, Fibrex material is the perfect choice for your new replacement windows.

What factors do you keep in mind when researching replacement windows? You want your windows to be durable, reliable, energy efficient, and beautiful. Fibrex® material makes a difference in every instance. We were even honored with a 2016 ENERGY STAR® Partner of the Year award. Replacing your windows can be a big investment. Make sure you’re choosing the best for your home. Measured across a range of conditions that affect the efficiency, maintenance, and beauty of windows, Fibrex® material performs well compared to vinyl, aluminum, fiberglass, and wood. Take a look and we think you’ll agree—replacement windows made of Fibrex® material are the right choice for your home. When you’re ready to learn more about how Renewal by Andersen® replacement windows are the best choice for your home, schedule a free consultation with us.


Our Hassle free process step 1 - IN-HOME CONSULTATION
Step 1

In-Home Consultation

Our design consultants listen to your needs and create a plan to improve energy efficiency and enhance your home's beauty.

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.