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How Well Does Fibrex® Age?

Quality windows last longer and add more value to your home. Just like the other areas of your home, windows should be maintained regularly. They do not only add beauty, but increase energy efficiency as well.

As a  windows company, Renewal by Andersen® of St. Louis has innovative new materials with which to make window frames. Our patented Fibrex® framing material, for one, is a composite that combines the strength and stability of wood with the low-maintenance qualities of vinyl. It is an eco-friendly material, made from 40% recycled wood fibers and 60% polyvinyl chloride (PVC).

Why Choose Fibrex®?

Fibrex lasts a long time, and it is two times stronger than vinyl. We ensure that all our windows are tested to make sure they don’t contract and expand due to changes in temperature.

But how do we test these windows? We do tests on-site and more specific tests in the lab. Even after 20 years, Fibrex frames will experience no cracks or peeling, and will remain easy to operate. 

Replacement windows from Renewal by Andersen are made of Fibrex. They are strong and operable and proven to perform well regardless of their age.

Apart from the Fibrex material, our windows also come with our High Performance™ Low-E4® glass that reduces heat transfer. Get started with your new window and doors project today by calling Renewal by Andersen of St. Louis at (314) 332-2364, or fill out our online contact form to request an estimate. We serve clients in Missouri, including Chesterfield.

 

Reviews

"Have nothing but great things to say about the window installation done today by John Hutchinson with Renewal by Andersen! He was friendly, personable and professional and did a great job installing. He did a great job of putting down roller pads and tarps with next to zero clean up. Would highly recommend them for any window replacement needed!"

Mark V.
Jun 26, 2025

"We had our new Renewal by Andersen windows installed on June 5th & 6th, 2025 and we LOVE them! The quality, beauty, and functionality are best-in-class! The whole experience from dinner presentation at Lazy River Grill, the initial in-home sales consultation and measurement, the regular communications from the salesman and concierge, and the installation team’s professionalism and skills made the process so seamless. This is the second home we have opted for Renewal windows and doors and have been delighted both times! Thank you Renewal by Andersen STL! "

Jeff C.
Jun 7, 2025

"I had an excellent experience with RbA STL. Our designer, Courtney, was great and the finished product is awesome. The installation was easy and the gentlemen left our home cleaner than they found it upon entering. I would recommend RbA STL - you’ll get tired from their constant contacts, and that’s a GOOD thing!"

Jeramy D
Jun 3, 2025

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