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Your Guide to How Fibrex® Windows are Manufactured

In the window industry, there are numerous brands and numerous windows available on the market to cater to your home’s needs. However, while they each have their individual benefits, window installation experts say that none are as beneficial or unique as the Fibrex® windows of Renewal by Andersen®. 


Here’s how Fibrex® windows are made:

Step #1: Gathering the Wood Fibers

For those who are unaware, the wood fibers used in the manufacturing of Fibrex windows actually come from the small, unused wood that are produced when milling the intricate profiles of Renewal by Andersen’s wood windows. Once the unused wood is reclaimed, they are then repurposed to make Fibrex material by shredding them to create the required wood fibers.

Step #2: Creating the Compound

Fibrex material for a double-hung or bay window is composed of 40% wood fiber and 60% proprietary polymer. Once the wood fibers have been gathered, it will be heated to extract all of its moisture and dried. Afterwards, the polymer will be heated to a specific temperature. Once it’s adequately heated, the materials will be combined. Once they’re combined, the wood fiber will merge with the polymer’s molecules to create the compound that makes the Fibrex material.

Step #3: Shaping and Coloring

Once the Fibrex compounds have merged with one another and the window is complete, the material will now be put through an extruder to be shaped. Afterwards, the color will now be applied permanently to the material before being completely assembled and shipped off to stores around the country.

Want to install picture windows in your home? Look no further than Renewal by Andersen of San Antonio. When it comes to window and door replacement projects, we are the leading professionals to approach and we won’t let you down! Give us a call at (210) 988-6466 or fill out our contact form to schedule a FREE consultation. We serve homeowners San Antonio, Boerne, Universal City, TX, and other nearby areas in the state of Texas.


"We were very pleased with the quality of the Anderson windows and the expert installation. This is our second window purchase from South West Exteriors."

Charles Korbell

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