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Advantages of Fibrex

Advantages of Fibrex

When it comes to durability and energy efficiency, wood and vinyl windows can’t hold a candle to Renewal by Andersen exclusive Fibrex frame and sash material. Fibrex combines the strength and insulating value of wood with the low maintenance features of vinyl in order to create a better replacement window or door. Here is a brief look at the full advantages of choosing Fibrex windows or doors.


Fibrex is a composite material, created by mixing wood grain and a thermoplastic material. It contains 40% reclaimed wood fiber by weight, much of which is reclaimed from Andersen Corporation’s wood window manufacturing facilities. This makes it an extremely sustainable material.

Energy Efficiency

Fibrex creates a weathertight seal on your home that does more than just protect it from water damage. This seal helps to eliminate energy leaks. Fibrex also blocks thermal transfer nearly 700 times better than aluminum to help reduce heating and cooling bills.

Low Maintenance

Fibrex material never requires painting and will not crack, pit, corrode, or rot.*

Lasting Beauty

The unique fabrication process behind Fibrex blends the color with the Fibrex material during production for long-lasting beauty. Fibrex can be customized to match nearly any existing décor, and is used in every style of window produced by Renewal by Andersen, both traditional and specialty. When you choose Fibrex replacement windows in Knoxville, our experienced design consultants will help you to select a style that best suits your specific needs.

Fibrex is utilized in both Renewal by Andersen replacement windows and Andersen doors. Knoxville area homeowners can turn to Renewal by Andersen of Knoxville for both of these outstanding products in order to improve the durability, energy efficiency, and beauty of their homes.

To learn more about Fibrex, give us a call or fill out our convenient online request an estimate form to schedule a free, in-home consultation on replacement windows or doors in Knoxville.

*See the Renewal by Andersen® 20/2/10 limited warranty for details.

“Renewal by Andersen” and all other marks where denoted are trademarks of Andersen Corporation. © 2014 Andersen Corporation. All right reserved.

1 Offer valid on initial visit only, not valid on prior sales. Cannot be combined with other offers. Offer valid for 30 days after receipt.