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Answering Common Questions About Fibrex® Windows

At Renewal by Andersen® of San Francisco, our main goal is to provide stylish and high-performing windows for every homeowner. To do this, we use only top-of-the-line materials in our manufacturing process, including our patented Fibrex® frame. 

Fibrex® Windows

Interested in learning more about this unique, high-quality frame material? We have compiled some of the most frequently asked questions about our innovative composite frame.

What Is Fibrex®?

Exclusive to Renewal by Andersen, Fibrex is a revolutionary material that combines the durability of wood with the low-maintenance properties of vinyl. It is primarily made by mixing reclaimed wood fibers with our own thermoplastic polymer, which helps produce all the benefits of wood and vinyl materials, minus their drawbacks. Due to this, Fibrex can resist cracking, bowing and decay even when exposed to fluctuating temperatures, making it a reliable frame material to work with.

Do You Use Fibrex in All Your Products?

In windows, yes. By using Fibrex in all our window products, we address customization requirements much easier because the material can be curved or molded for the exact window size or shape. This is in contrast with other materials, such as fiberglass, which can only be formed in straight lines. Regardless of the style you’re looking for, you can be sure that we’ll have a window suited just for you.

Does Fibrex Come With a Warranty?

All of our windows are backed by a 20-year limited warranty for Fibrex and glass, a 10-year limited warranty for the frame, sash and locking mechanisms, and a 2-year limited warranty for installation. This comprehensive coverage gives homeowners peace of mind, knowing that they only get the highest quality of products and outstanding installation services.

If you need a professional to assist you in installing Fibrex windows, count on Renewal by Andersen of San Francisco. We are the leading source of high-quality replacement windows in the region. Call us at (510) 990-3690, or fill out our form to get a FREE consultation. We serve homeowners in San Francisco and the nearby communities.


"I wished to have this done long time ago, had I known the benefits of these products provided by Renewal by Andersen"

June 26

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