If you’re shopping for replacement windows in Wisconsin, you probably know that durability is key. With extreme winters, summer storms, and everything in between, your windows need to stand up to the test of time. That’s where Fibrex® comes in—Renewal by Andersen’s exclusive material engineered to be the most durable window frame material on the market.
Designed for Long-Term Strength
Fibrex® combines reclaimed wood fiber and thermoplastic polymer, creating a two-times stronger composite material than vinyl. It resists cracking, bowing, warping, and fading, even after decades of exposure to Wisconsin’s fluctuating temperatures.
Weather-Tested Performance
In Wisconsin, homeowners need windows that can handle harsh weather. Fibrex® performs consistently, even when snow piles high or summer heat hits. Unlike wood or vinyl, it won’t swell, rot, or become brittle.
Efficiency That Goes Beyond the Frame
A durable window frame does more than survive the weather—it helps reduce energy waste. Fibrex® insulates as well as wood, and when paired with advanced Low-E glass options, it can significantly improve your home’s energy efficiency year-round.
Maintenance-Free Living
Tired of repainting or sealing your windows? Fibrex® never needs it. The color is infused directly into the material, so it won’t fade or peel like painted wood. That means more time enjoying your home—and less time maintaining it.
Eco-Friendly and Energy Smart
Made from 40% reclaimed wood fiber by weight, Fibrex® is an environmentally responsible choice. By choosing this durable window frame material, you’re also making a sustainable decision that reduces landfill waste and supports energy conservation.
A Warranty You Can Count On
At Renewal by Andersen® of Greater Wisconsin, we back our Fibrex® windows with one of the strongest warranties in the industry. With 20 years of coverage on the frame material, you get peace of mind that your investment is protected.
Durable, Dependable, Distinctly Better
Fibrex® offers the kind of performance Wisconsin homes need. When you’re ready to upgrade your windows, choose the durable window frame material trusted by thousands of local homeowners.
