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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.


"Renewal by Andersen windows experience has been great. From my initial call to Andersen on inquiry about their windows and doors through the order and installation process everyone I’ve dealt with has been great. Great process, great product and most of all great people to work with. Thanks."

Kevin Sweetin
Feb 28, 2024

"I just bought my first house. My patio sliding door was rotten. So, I needed it to replace it. Renewal by Anderson of Southern Missouri listened to what I wanted and delivered it. They did a fantastic job of installing and cleaning up afterwards. They did it even in freezing rain that day I was scheduled to have it replaced. They even had a follow-up to check things out and do the touch ups. I'm amazed at there work. Great job Renewal by Anderson."

DKay Mikel
Feb 9, 2024

"On Feb 1,2024 my husband and I selected Renewel by Andersen for windows for our entire house. It made our house more beautiful with the picture windows. Made the outside more attractive, and on the inside. We did 14 windows. We had 4 men come to do the job in 1 day And they were very friendly, efficient,fast and cleaned up inside and outside perfectly. And most importantly we noticed the heating furnace runs less,therefore saving us money on our gas bill. We live in SW Missouri. We recommend anyone who wants to replace windows in their home to pick Renewal by Andersen. Sincerely, Darius and Nancy Durman"

Nancy Durman
Feb 7, 2024

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