Fibrex windows are composed of eco-friendly materials that include both recycled wood fibers and scraps of vinyl. Most of the scraps are taken from existing wood windows and any other facing materials that are found on the interior of the windows. The fabrication process consists of combining the scrap wood pieces and integrating them with the vinyl to obtain a new material. The final product performs similarly to vinyl but has twice the strength.

Patented Process

Andersen Windows has patented the Fibrex material process. The formula consists of recycled Ponderosa pine fibers (at 40%) and polyvinyl chloride (at 60%). The windows were primarily created to lower the company’s production costs. By utilizing the wood fibers and sawdust that initially came from already existing windows, the company was able to develop the product. There was a concern with wood rot, but with the PVC coating enveloping the fibers, any possible rotting would be at a much slower pace.

Thermal Transfer and VOC

Another important aspect of Fibrex material is its ability to block thermal transfer, which reduces energy costs for both heating and air conditioning. In addition, dangerous VOC (Volatile Organic Compounds) are decreased. This is because the Fibrex process doesn’t involve preserving treatments or painting that could emit hazardous fumes. There is a feeling of well being with Fibrex windows and their environmentally friendly nature.

Fibrex Comparison to Other Window Types

As far as comparisons to other types of windows, those that are comparable to Fibrex usually include vinyl, as well as fiberglass, wood, aluminum, and steel.


Both Fibrex and vinyl windows are durable, attractive, energy-efficient, and easy to maintain. The main difference with Fibrex and vinyl is Fibrex’s longer-lasting value and its overall strength. Fibrex windows are twice as strong as vinyl windows, plus they last considerably longer than their vinyl counterparts.

Though vinyl is somewhat comparable to Fibrex in durability, energy efficiency and attractiveness, vinyl frames are usually thicker than Fibrex windows. This difference decreases the total glass area of a window. Vinyl is also less able to take heat extremes. These can result in bowing, sagging, and bending. Its susceptibility to UV rays can cause discoloration, while Fibrex windows won’t fade over time.

Fibrex is also better able to withstand changes or distortion that can occur with heat extremes. Thermal expansion is also an issue with vinyl. Its expansion rate is far greater than that of Fibrex. The wood fibers in Fibrex help control that kind of expansion.


Fiberglass replacement windows provide more strength than vinyl as well as high energy efficiency. In comparison to Fibrex, fiberglass windows are not pliable in the same sense as Fibrex. They are fashioned in a straight line, and as a thermoset material, fiberglass windows cannot be formed into new configurations. Unlike Fibrex, fiberglass is offered in few colors and additional features. Fiberglass is also higher priced than even vinyl.


As Fibrex consists of wood fiber and binding polymer, it gains exceptional strength and surpasses the strength of real wood. Wood also requires consistent maintenance to uphold its structural integrity and appearance. Wood can splinter, rot, warp, and start to look old and worn. If wood frames are not maintained, they can twist and swell from moisture accumulation, and they can also be subject to insect infestation. Without sealing, staining, painting, or regular care, real wood, in spite of its beauty, can deteriorate; whereas, Fibrex has built-in protection through color infusion directly into the material, which allows Fibrex windows to maintain their stability and beauty.


In comparison to Fibrex, aluminum is simply not able to adequately insulate the way Fibrex can. Aluminum window frames lose heat and cold, so they are not as energy-efficient. They are also subject to the buildup of condensation and can appear corroded, worn, and pitted. Fibrex, in contrast, is able to insulate as well as save on energy costs.


Though extremely strong, durable, weather-resistant, and fire-proof, steel windows are subject to both corrosion and rust. They also have problems with condensation, sweating, and fogging up on their interior surfaces. Due to their insulating abilities, steel windows can reduce cooling and heating costs, but they can be expensive, and their overall heaviness can make for labor-intensive installations. Fibrex doesn’t present these concerns as they are guaranteed not to corrode, crack, rust, pit or peel or deteriorate.

Beneficial Aspects of Fibrex

  • natural and superior insulator
  • attractive appearance
  • low maintenance
  • twice as strong as vinyl
  • limited to no expansion/contraction
  • resistant to decay, rot, and fungus
  • resistant to peeling, flaking, blistering, pitting and corroding
  • dark exterior color options because of heat resistance
  • longer-lasting color
  • performs well in comparison to vinyl, fiberglass, wood, aluminum, and steel
  • fair pricing
  • best window limited warranty
  • reclaimed material use
  • environmentally and green-friendly
  • lower utility bills
  • all around energy conservation
  • fewer VOC emissions

There is no window material more innovative than Fibrex. It’s not only pleasing in appearance, but it is also long-lasting, efficient, affordable, maintenance-free, and eco-friendly. If you’re contemplating the use of Fibrex windows in your home or business, complete the online contact form and a representative will help you with any further concerns you may have with Fibrex Windows. Fibrex Windows just may be the answer to your every window need, and you just may wind up incorporating these wonder windows in your home’s future.