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 thermoplastic 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.

Fibrex StrengthFibrex Thicker FinishFibrex Temperature Resistance

A-Series

A-Series Awning Window
a-series-awning-product-intro
A-Series Awning Window
A-Series awning windows
A-Series awning windows

A-Series

Awning Window
$ $ $ $ $
  • Weather-resistant design makes this our best-performing awning
  • Wide array of style options including factory-finished wood interiors for architectural authenticity
  • Triple-pane glass options provide exceptional energy efficiency
A-Series Casement Window
a-series-casement-product-intro
A-Series Casement
A-Series casement windows
A-Series casement windows

A-Series

Casement Window
$ $ $ $ $
  • Weather-resistant design makes this our best-performing casement
  • Wide array of style options including factory-finished wood interiors for architectural authenticity
  • Triple-pane glass options provide exceptional energy efficiency
A-Series Double-Hung Window
a-series-double-hung-product-intro
A-Series double-hung window exterior
A-Series double-hung window interior photo
A-Series double-hung windows

A-Series

Double-Hung Window
$ $ $ $ $
  • Our best-performing double-hung
  • Wood protected by fiberglass and Fibrex® composite material
  • Stained and painted wood interiors offer architectural authenticity
A-Series picture window interior
a-series-picture-intro
A-Series Picture Window
A-Series picture window interior photo
A-Series picture windows

A-Series

Picture Window
$ $ $ $ $
  • Our best performing picture window
  • Wood protected by fiberglass
  • Beautiful wood options for architectural authenticity

100 Series

100 Series Awning Window
100 Series Awning Window
100 Series Awning Window
100 Series awning
100 Series Awning

100 Series

Awning Window
$ $ $ $ $
  • Made with Fibrex® composite material
  • Won't fade, flake, blister or peel
  • Available as single unit or twin combinations
  • Available as replacement insert window
100 Series Casement
100 Series Casement Window
100 Series casement window
100 Series casement window
100 Series casement window

100 Series

Casement Window
$ $ $ $ $
  • Made of Andersen-exclusive composite material (Fibrex®), which is twice as strong as vinyl
  • Virtually maintenance-free
  • Available as single units or in twin and triple combinations
  • Available as replacement insert window
100 Series gliding window
100-series-gliding-product-intro
100 Series gliding window
100 Series gliding

100 Series

Gliding Window
$ $ $ $ $
  • Made with composite material known as Fibrex®
  • One stationary sash and one that opens
  • A three-sash option, where two sash glide past a center sash, is also available
  • Available as replacement insert window
100 Series picture window
100-series-picture-product-intro
100 Series Picture Window
100 Series picture windows
100 Series picture windows

100 Series

Picture Window
$ $ $ $ $
  • Made with our sustainable composite Fibrex® material 
  • Narrower frames  mean more glass - and more view
  • Available as single, twin or triple combinations and as transom windows
  • Available as replacement insert window
100 Series Single-Hung
100-series-single-hung-product-intro
100 Series Single-Hung Windows
100 Series single-hung windows
100 Series single-hung windows

100 Series

Single-Hung Window
$ $ $ $ $
  • Made with Andersen-exclusive Fibrex® composite material
  • Warranted not to flake, rust, blister, peel, crack, pit or corrode
  • Movable lower sash allows ventilation
  • Available as replacement insert window
100 Series Patio Door
100-series-gliding-door-intro
100 Series gliding door
100 Series gliding patio door
100 Series gliding door

100 Series

Gliding Patio Door
$ $ $ $ $
  • Durable Fibrex® composite material construction
  • Rigorously tested to deliver years of smooth, reliable operation
  • One stationary panel and one that glides smoothly on adjustable rollers
100 Series Video Windows Matter

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