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.

Not only is Fibrex^® material a high performance material, but we conserve raw materials when we make it. All of the wood fibers used in the compounding process, as well as some of the thermoplastic polymer, are reclaimed directly from the 65-acre Andersen Corporation manufacturing plant operations in Bayport, Minnesota.