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6 Common Myths about Fiberglass Windows

Fiberglass made a splash in the window market and has quickly became one of the more widely purchased window materials. But many homeowners are wary and worry about fiberglass windows standing up to the hype. When purchasing replacement windows, you need to know you are getting products that will last for years to come—which is exactly what fiberglass can provide. But unfortunately, there is false information floating around. It has customers believing their concerns are justified. So here are a few misconceptions you shouldn’t believe about fiberglass windows:

  1. Fiberglass Windows are Too New

Many people are hesitant to purchase fiberglass windows because they don’t have a proven track record. Sure, compared to wood, aluminum, and even vinyl, fiberglass windows are fairly new. But while they are still considered cutting-edge, the patent for fiberglass windows dates as far back as 1946. The quality of today’s fiberglass windows speaks for itself. Window technologies have come leaps and bounds in the last thirty years. Fiberglass windows are dimensionally stable, well insulated, and weather resistant.

  1. Fiberglass Windows are Not Energy Efficient

The truth is many factors contribute to the efficiency of a window including size, style, material, glazing, and installation. But if you sit down with an expert and work together to choose the right model, material, and glazing options, you could save 35 percent or more on your energy bills with Infinity From Marvin® windows. This is especially true if your current windows are more than 20 years old.

  1. Fiberglass Windows Peel Over Time

One of the benefits of fiberglass windows is the wide array of color choices and finishes. And yes, you can paint fiberglass windows to more closely match your home’s exterior. But it doesn’t need to be painted and fiberglass resists UV rays naturally. By choosing a factory-finish coating, it will last for twenty years or more.

  1. Fiberglass Windows are High Maintenance

High quality fiberglass windows can look just like wood, and in turn, many people mistake that to mean these windows require the same upkeep. But you do not have to peel, sand, and refinish fiberglass windows every couple of years. These windows only require an occasional cleaning with mild soap and water to look like new.

  1. Fiberglass Windows are too Expensive

It is true that the upfront cost of fiberglass windows is generally higher than other materials, but you have other costs to consider. Wood windows require repeated maintenance to stay looking their best. Aluminum windows are strong, but can easily dent and scratch over time. Vinyl windows are weather resistant and energy efficient, but they don’t have as long as lifespan as fiberglass windows. Ultimately, fiberglass windows last longer with less maintenance, so you get what you pay for and the investment will be worth it in the long run.

  1. Fiberglass Windows Don’t Last Long

A lot of people believe fiberglass windows are brittle and that they will crack, chip, and fade. The truth is, fiberglass windows are actually more impact resistant than other window materials. These windows have the lowest seal failures and the longest high quality performance. But to capitalize on all these benefits, proper installation is key.

Signature Window and Door is an exclusive dealer for Infinity From Marvin® fiberglass windows. We have over 30 years of experience in the industry and make sure you receive the best products and service possible. Call 253-887-7792 to schedule a time to sit down with one of our experts and get a free quote on replacement fiberglass windows in Tacoma. Or feel free to visit us at 22613 68th Ave S, Kent, WA 98032.

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rachel mf profile picture
rachel mf
17:04 06 Mar 26
I cannot praise Signature highly enough. We hired them in 2012 to replace all of our windows and two sliding doors - the work was excellent and we love our Simonton windows. We just hired them again to rebuild our two-story entryway and install a Perva door and new windows. From the very thorough conversations with our salesperson, Vitaliy, to the scheduling with the office staff, to the actual installation - everything is as professional and high quality as you can find. We gathered quotes from three other companies but none of them went to any effort to truly lay out how the job would be accomplished. Photos show the old & new interior side, and the new exterior. Still needs painting but we're so happy!
G Zenkin profile picture
G Zenkin
04:19 04 Mar 26
After an extensive vetting process and comparing multiple options, I confidently chose Signature Windows & Doors for my home, and they absolutely delivered. The Marvin brand windows they installed are beautiful and of incredibly high quality—the craftsmanship speaks for itself. Beyond the great product, the installation process was truly exceptional. The crew was professional, precise, and made the entire project seamless from start to finish. I highly recommend them to anyone looking for top-tier windows and flawless execution. I had a fantastic experience with Signature Windows & Doors.
Michele V profile picture
Michele V
00:13 26 Feb 26
We called our project "The Window From Hell." It was a HUGE trapezoid window up high in a 2-story living room, and it needed to be replaced after its seal failed. I got bids, and was the most impressed with Danny L at Signature Windows. We had a tight deadline because the home was going on the market and access to the window, especially in the rain, was really challenging. Meeting the deadline, and the safety of the installers, were non-negotiable. Danny came out the very next day to measure the Window From Hell and, not only did he give me the best price, but his company was the only one that had all the scaffolding equipment readily available at no extra charge. The window arrived sooner than expected, and installation was quickly scheduled to meet the deadline. Then we hit a snag: some epic rain made the cedar roof too slippery for safe conditions. Brent and his crew of expert (and very brave) installers rigged up a safe way to haul this brand-new Mother of ALL Windows up to the second floor and install it using very long ladders, secure scaffolding, and harnesses. I think we had 4 or 5 installers for this job. It took all day to get the old Window From Hell out and the new Mother of All Windows installed. But what a job! Perfect caulk lines, perfect cleaning of the glass, perfect clean-up of the job site, indoors and out. Job done ON TIME, SAFELY, and at an excellent price. If Signature can handle my Window From Hell, I am very confident they can install ordinary double-hung windows that exceed your expectations for quality, price, timeliness, and workmanship. I highly recommend Signature Windows.
Robert Horn profile picture
Robert Horn
01:35 19 Feb 26
I highly recommend Signature. Windows look great, we are really happy with our installers too, they picked up everything each day and were real craftsmen, they took pride in the work they were doing for us.
Leanne Bough profile picture
Leanne Bough
23:41 12 Feb 26
Signature windows was wonderful to work with from the sale through the installation.
Dana B profile picture
Dana B
18:02 25 Nov 25
Everything from the initial consultation, regular updates on my order and installation was wonderful. The most recent installation was the third time I've had Signature replace old windows and I've been so pleased every time. They took the time to explain which windows needed replacement and provided options without any sales pressure. It's so nice to work with a company that believes in great customer service and offers quality products.
Amy Dahlin profile picture
Amy Dahlin
16:47 23 Oct 25
We have chosen to work with Danny and his team at Signature Window & Door twice now. We love the quality of the windows and the help they provide in the design process all the way to the finished installation. We put in a 15' folding door at our last home. It was a showstopper! Highly recommend them to bring your home back to life with beautiful windows that are built to last!
Pam Moser profile picture
Pam Moser
22:08 18 Feb 25
We bought a house that needed all new windows & sliding glass doors replaced. So we did our research and visited window replacement companies to see & touch different window & screen types. We decided to work with Signature Window primarily based on customer service as we received during the research & planning process with Office personnel (friendly, helpful, responsive) & Sales team (product knowledge, design assistance, open & honest).

1st Project (Aug 24) - 8 windows & 1 Sliding Door
2nd Project (Feb 25) - 1 ceiling to floor large window & 2 windows
Product of windows & door was excellent - we are extremely happy.

The customer service experience was superb. We worked with Sales Rep, Scheduler, Window Measuring Rep & Installers - all were friendly, open & honest, communicative, assisted with design & product knowledgeable. Installers did an awesome job with project cleanliness & kept busy all day long.

We are extremely satisfied with our overall experience with window replacement with Signature Windows 🥰
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Our Reviews See What Your Neighbors Are Saying

From the beginning to the end of this project, the Customer Care team was top-notch. They easily accommodated my difficult schedule, the requirements of the historical building I live in, and were super responsive to all my questions. The installation team was flawless. They worked around…

Kelly R.

Kelly R.

Signature always comes through, their products and work is always top notch, yes, they are a premium service but you get what you pay for, and I really enjoy having great doors and windows to my home.

Seth S.

Seth S.

I’m extremely pleased with Signature Windows. From start to finish the whole process has been wonderful. After the windows were shipped they were installed in less than a week (about 20 windows). The crew, Raymond and Walter (and Eric one of the days) was amazing. They…

Mary H.

Mary H.

Working with Signature was a pleasure. The design and product selection process was collaborative and thoughtful. The communication from start to finish was excellent. The installation crew was friendly, efficient, and skilled. We replaced a very old and very oddly installed back door on our house,…

Marc H.

Marc H.

We used this company several years ago to replace the upstairs windows and recently replaced the downstairs ones. Their costumer service is outstanding and the work was done very proffesional. Everyone involved with the project did an excellent job and we are very happy with the…

Valentina M.

Valentina M.

Signature Window & Door Replacement
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