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Fibrex® vs. Vinyl: Which Should You Choose?

While vinyl is still a hugely popular material for making cheap, effective windows, one industry leader, Renewal by Andersen®, has created a proprietary composite called Fibrex®. Since Fibrex is a price-point competitor with vinyl, how do the two materials compare in new-construction and consumer-level replacement windows?

Fibrex® vs. Vinyl

What Is Fibrex®?

Fibrex is a composite material made with a blend of 40% wood and 60% plastic fibers. It offers the strength, energy efficiency and beauty of wood windows, and is the most sought-after alternative to vinyl windows due to its durability. The Fibrex fiber tech polymers hold up well in all climates and are resistant to the cracking and warping you may see in vinyl windows.

Furthermore, Fibrex is corrode-proof, and it won’t succumb to the growth of mold. It also doesn’t decay or rot, instead, maintaining its timeless look. There are even fewer volatile organic compounds (VOCs) in Fibrex compared to other windows.

Which Is Better: Vinyl or Fibrex Windows?

While both window materials have their merits, Fibrex windows are the better option. Vinyl windows are a cheaper option, but they are prone to wear and tear over time and will need to be replaced sooner. If you’re still on the fence about whether Fibrex or vinyl windows are the right choice for you, here are some factors to keep in mind.

1. Strength: While vinyl windows are strong, Fibrex is twice as strong, no matter how volatile the weather may get. The strength doesn’t deteriorate over time – these windows will last for decades.

2. Durability: Fibrex windows are the more durable option. They’re far less prone to chipping, warping or rotting.

3. Decay resistance: Vinyl can get dirty and stained, and collect mold. With its unique materials, Fibrex windows are easy to clean and won’t mold or rot.

4. Heat distortion point: In hot climates or direct sunlight, Fibrex won’t bend or warp. On the other hand, vinyl may warp when exposed frequently for long durations.

5. Thermal expansion: Fibrex thermal expansion is low, so you can expect it to expand and contract very little. Vinyl has a much higher rate of expansion, making vinyl window frames susceptible to warping and cracking over time.

6. Insulating properties: Fibrex blocks thermal transfers at a higher rate than vinyl, which can help you save on heating and air conditioning.

7. Compressive strength: Fibrex composite windows have greater compressive strength than vinyl. This is why composite windows have a thinner frame and more glass.

8. Green benefits: Fibrex is made partly by reclaimed materials, making it an environmentally friendly option.

Renewal by Andersen is a full-service home window replacement company. As part of the huge Renewal by Andersen family, Renewal by Andersen of Southwest Missouri takes inspiration from our parent company’s tradition of quality, innovation and craftsmanship.

We offer free in-home consultations to ensure our customers’ needs are heard and understood. We also provide professional installation services to guarantee the optimal performance of our window products. Call us today at (417) 268-9301, or fill out our convenient request form to get a free quote on service.


"Excellent service and product! They checked in with me every few weeks while we were waiting for the order. I was impressed with Sam, who measured my windows and headed the installation crew. He was respectful and patient with his team. They cleaned up after themselves. Before the new windows I had huge windows that didn’t open. Now I feel much safer and get better temperatures in those rooms."

Kimberly Kester
Jul 18, 2022

"My experience with Anderson Renewal was amazing! From the first meeting with Miranda to choose my windows and doors to the installation provided by Tim and his crew was a pleasure! I just bought a home built in the 1960's that needed new windows and a new double front door with sidelights. As everyone knows Anderson Windows are great, but it was the people I interacted with from Anderson that made it such a great experience. It took three days for the windows and door to be installed and they "worked" every minute they were here. My huge front door took most of the day to install because they had to put in a new header and other improvements to make it fit! They even put up new drywall on the inside. Many people in the neighborhood have stopped by to comment on my beautiful front door! I think the crew left my house cleaner than it was before they started! Constantly cleaning up after themselves. I am thrilled with my windows and feel lucky to have met the team at Anderson."

Kimberly Wilson
Jul 17, 2022

"Very professional staff . No pressure sales. The job they do is neat and clean, no cleanup left for the owner. Communication is great. Always informed on the status of of your product, AND the tin of cookies you receive afterwards is a pleasant plus."

Peggy Spivy Morse
Jul 13, 2022

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