Windows Manufacturers / Andersen Windows

Andersen Fibrex Windows

Fibrex® is a replacement window frame material that's been around for many years, and made exclusively by only one home replacement window manufacturer, Andersen Corporation, in business for over 100 years. They spent tens of millions of dollars to invent and develop the Fibrex® material and they are the only ones who have it.

What Is FIBREX®?

Revolutionary Fibrex ® material helps set our windows apart. This breakthrough composite combines the strength and stability of wood with the low-maintenance features of vinyl. Fibrex® material is a blend of wood fiber and a specially formulated thermoplastic polymer that's resistant to changes in temperature, contracting minimally in heat or cold. That means it's also resistant to bowing and cracking, conditions that lead to air and water infiltration. Fibrex ® material is also an excellent insulator preventing heat or cold transfer into or out of your home. What's more, Fibrex material resists decay and prevents future rot*, so you'll never have to scrape or paint.

Andersen Corporation became the first and only Green Seal® Certified window manufacturer in large part due to the environmental benefits of how we make Fibrex. But did you know that the sustainability of Fibrex extends to the home as well?

  • Insulation
    Because of its superior thermal insulating properties, Fibrex can help reduce heating and cooling requirements.
  • Durability
    The thermoplastic polymer in Fibrex resists rot, decay, and fungal growth, ensuring a longer lifetime and reducing manufacturing demand. Warranted not to flake, blister, peel, pit or corrode.
  • VOC Reduction
    Fibrex also helps reduce VOC emissions, since no wood preservative treatment or painting is required.