about-icon design-studio-icon door-icon ideas-icon phone-icon pro-resourses-icon search-icon support-icon feedback-icon window-icon main-nav-search architect-icon builder-icon commercial-icon contractor-icon remodeler-icon breadcumb-icon
Composite Windows

Composite - The Smart Alternative To Vinyl


We developed a material that is 2x as strong as vinyl, performs better when exposed to extreme temperatures and delivers exteriors that won’t fade, flake, blister or peel. We call it Fibrex® material. It's made up of reclaimed wood fiber and PVC polymer that is fused together and is unique to Andersen.

Explore Andersen® products that feature composite below.

What Is Fibrex® Material?

  • A blend of 40 percent wood fiber by weight, mostly reclaimed from Andersen manufacturing processes, with 60 percent thermoplastic polymer by weight, some of which is also reclaimed. 
  • Blocks thermal transfer nearly 700 times better than aluminum to help reduce heating and cooling bills.
  • Reduces VOC emissions because no wood preservative treatments or painting is required.
  • Twice as strong as vinyl, so weathertight seals stay weathertight.
  • Retains its stability and rigidity in all climates.
  • A unique fabrication process blends the color with the Fibrex® material during production for long-lasting beauty.
  • Resists rot, decay and fungal growth, and won’t flake, blister, peel, pit or corrode*

*See individual product warranties for more information.

100 Series

100 Series products are made with our sustainable composite Fibrex® material for durability and energy efficiency.

100 Series Single-Hung Windows
100 SERIES
Andersen 100 Series Awning Windows
100 Series
100 Series Casement Windows
100 Series
100 Series Gliding Windows
100 Series
100 Series Picture Windows
100 Series
100 Series Sliding Glass Doors
100 Series

A-Series

A-Series products are made of wood with a fiberglass and Fibrex® composite material exterior to resist water and seal out the elements.

Andersen A-Series Awning Windows
A-Series
A-Series Casement Windows
A-Series
A-Series Picture Windows
A-Series

Why Materials Matter

Materials are one way that we've led the industry in innovation.  Explore the ways we use different materials and find out why.

Explore Materials

Andersen Windows Composite

The Andersen Difference

Whether you're renovating your home or building from the ground up, we've got what you're looking for. When you choose Andersen, we not only provide you with high-performing, dependable products, we support them with exceptional service. New windows and doors can be a major investment, but if you choose wisely, you're rewarded with better light, comfort, added security and energy efficiency. When it comes to making such an important decision, make sure you go with a brand you can trust.

Discover the Andersen Difference