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The Manufacturing Process of Fibrex® Frames

When replacing your windows, you have a wide range frame materials to choose from. The most common choices are vinyl, aluminum and wood. However, there’s another option that’s quickly gaining popularity, and for good reason: Fibrex®, a Renewal by Andersen® exclusive.

Here is everything you need to know about the manufacturing process of Renewal by Andersen’s Fibrex frames.

Step #1: Creating the Compound

Reclaimed wood fibers from manufactured window frames are heated to extract moisture. Once they’re dry, the polymer is heated to specific temperature before the two materials are combined. The wood fiber and polymer molecules will bond together, creating the compound that becomes the wood fiber used in creating Fibrex frames.

Step #2: Encasement

Once the compound is created, the manufacturers encase the wood fiber in liquid polymer to fill the individual cells of the fiber without crushing them. After this encasement process, the wood fibers then align together, giving the Fibrex material of your double-hung or sliding windows its strength and ability to repel moisture.

Step #3: Finishing Touches

After the binding and encasement process, the compound will then flow through an extruder. At this stage, the manufacturers will be able to form it into virtually any shape before they apply the color that makes Fibrex frames an aesthetically pleasing material.

Want to install new custom windows in your home? Don’t hesitate to turn to Renewal by Andersen of Austin, leading experts to approach when it comes to your window replacement and installation needs. Give us a call at (512) 298-2270 or fill out our contact form to schedule a FREE consultation. We serve homeowners in Georgetown, TX, and other nearby areas.


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