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Fiberglass Casement Windows
Fiberglass Casement Windows
Fiberglass Double Hung Windows
Fiberglass Double Hung Windows
Fiberglass Replacement Windows
Fiberglass Replacement Windows
Marvin Fiberglass Windows
Marvin Fiberglass Windows

Fiberglass Windows

Fiberglass Windows are strong, durable, and require little — if any — maintenance. While they may not feel as traditional as wood windows, they usually last longer and require less maintenance investments from homeowners. They can be installed in any climate, and they almost never chip, rot or warp. So, rather than worrying about repairing or repainting windows, you can simply relax and enjoy the view.

A small amount of fiberglass can support a heavy amount of weight. That’s why it’s the material of choice for building boats, bridges and even hardhats. Fiberglass is tougher and lighter than wood, and as low maintenance as vinyl window composites. Additionally, fiberglass is virtually unaffected by moisture and temperature fluctuations.

When you install fiberglass windows, your home will withstand every seasonal change, from cold winters to rainy springs and hot summers.


While there are other high-quality fiberglass window manufacturers to choose from, few compete with Marvin®. As an industry leader, Marvin continues to innovate wherever possible, boasting a patented, pultruded fiberglass.

The Marvin pultruded fiberglass materials are 8x stronger than vinyl windows and 3x stronger than vinyl/wood window composites. These energy efficient windows use insulated glass fibers, making them a top choice for window frame materials and window insulation.

Furthermore, the pultruded fiberglass remains stable in extreme temperatures. They expand and contract at nearly the same rate as glass. This allows the fiberglass to work with the glass and not against it. So, your fiberglass frames and windows will stay strong in harsh weather conditions.

Marvin Essential™ Collection

The Marvin Essential™ collection delivers premium quality and unmatched performance. Featuring 100% fiberglass exteriors and interiors, its fiberglass windows are virtually maintenance free.

Additionally, their narrow sightlines and versatile styles allow them to blend in with any home. An ideal option for homeowners looking to minimize housework. The Marvin Essential™ windows are durable and make a bold visual statement in any home.

  • Fiberglass interiors
  • Fiberglass exteriors
  • High performance windows

Marvin Elevate™ Collection

The Marvin Elevate™ collection combines beautiful design with superior strength and durability. Featuring rich wood interiors and durable fiberglass exteriors, they are ideal for homeowners who want to minimize upkeep. Additionally, this allows them to not sacrifice the timeless beauty offered by wood. Rather than force you to choose between style and longevity, Marvin Elevate™ windows strive for the middle-ground.

  • Fiberglass interiors
  • Wood exteriors
  • Beautiful windows that perform

A Davis Window & Door Professional Staff Member is Ready to Help

We at Davis Window & Door will help you select the right fiberglass replacement windows for your next home improvement project. We stock a variety of window styles, custom sizes, and brands from Marvin®. Our knowledgeable staff can walk you through the unique qualities of each one.

Visit our Request a Consultation page to speak to a professional. Get the information you need to help make a decision on fiberglass windows in Atlanta and Charlotte.

Davis is committed to ensuring every step of your project runs smoothly — from budgeting and product selection to window installation. With more than 100 years of combined sales and technical experience, our staff consists of reliable partners who you can trust.

Availability and Options

Double Hung

Our Homeowners Say

“Of all the window companies, they were the most knowledgeable and thorough. Their installers were second to none. I would gladly recommend using Davis Window & Door.”

“This is the second house we have used Davis to replace every window in the house. They do a wonderful job, keep the job site neat, and the windows are fantastic! Would recommend Davis to all!”

“Davis Window and Door were very professional, on time, and completed work on schedule.They paid attention to every detail and had me check all work before I signed off on it.I would highly recommend them.”

“Very pleased with the windows. Priced $1000’s less than comparable windows we priced out. The crew was fantastic coming back on Saturday and Sunday to finish small portion which was delayed due to weather.”


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