Fibrex® Material: Better Than Traditional Window Frames

To get replacement windows with reliable performance, exceptional insulation and a long life span, look no further than Renewal by Andersen® replacement windows. We are the only replacement windows company that offers window frames made of the Fibrex® material.

In this blog, we’ll take a closer look at what makes this exclusive material better than traditional replacement window materials.


Fibrex was developed by our parent company Andersen® Corporation, who, in 1958, decided that traditional materials like wood, vinyl and aluminum didn’t have the qualities they wanted in a single material. To improve durability and energy efficiency, and make the windows easier to maintain, manufacturers combined materials to produce “cladded” frames. Aluminum frames, for example, can be cladded in vinyl for protection and reduced upkeep.

After decades of research, Andersen Corporation finally came up with Fibrex, a composite material made of wood fibers and polymer. It features the strength and stability of wood with the no-fuss features of vinyl. Renewal by Andersen is the only replacement windows contractor authorized to offer this amazing material.

Advantages of Fibrex

Unlike traditional wood frames, Fibrex material is resistant to the effects of exposure to moisture, such as rot, warping and mold and mildew growth. The combination of wood fibers and polymer even allows for expansion and contraction when exposed to temperature extremes and helps avoid warping and cracking, which often happens with wood and vinyl frames. It also features built-in insulation that helps minimize heat transference, resulting in lower energy consumption.

Like vinyl, Fibrex requires minimal maintenance. You can keep it clean with a garden hose, a sponge and a cloth for wiping it dry. The exterior metal oxide coatings on our High-Performance™ Low-E4® glass packages make it much easier to maintain your windows as it prevents up to 99% of water spots when activated by sunlight.

When you choose Renewal by Andersen replacement windows, you’re getting the best of all replacement windows ever made. To learn more about what our Fibrex material can do for your home, call Renewal by Andersen of Quad Cities today at (844) 366-7784. You can also fill out our contact form to schedule a free in-home consultation. We serve many areas in and near Davenport, IA.