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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.


"I've been impressed with each step so far. Josh my salesman, Gerry my project manager & the installation crew have all been great people to work with. Also, the many different office workers who have reached out to let me know how things were progressing are greatly appreciated. Thank you to all team members!"

J Nick
Nov 15, 2022

"They did a super job, matched my woodwork stain perfectly, cleaned up well after their work was done and were polite and professional."

alana mccleary
Nov 15, 2022

"From initial review and purchase to installation, this team provided outstanding service. We were informed about the project status from start to finish. Everything was clear to us. We were very please the 6 windows were ready and installed earlier than originally planned. We'll work with them again on our next window replacement project."

Jeffery Brown
Nov 17, 2022

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