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What are the Pros and Cons of Bay and Bow Fiberglass Windows in Seattle, WA?

New fiberglass windows are a beautiful addition to any home. But choosing the right style can be overwhelming. There are so many options on the market. Here is some useful information about bay and bow fiberglass windows, and why they might be the right choice for your home in Seattle, WA:

What are Bay Windows?

These windows feature three insulated glass units (IGUs) arranged as a single unit. The center window is often a larger, fixed window. The two flanking windows are typically smaller, operable windows set at an angle. This way the entire window projects outside. These windows can work for both traditional and more modern architecture.

What are Bow Windows?

These windows include four, or more, taller IGUs arranged as a single unit. The windows can be fixed or operable, and they are set on a curve that projects outside. These windows work well around turrets and corners and the style is best suited for more historic architecture.

Advantages of Bay and Bow Windows

Some of the benefits you can expect from bay and bow fiberglass windows include:

  1. More Natural Light

Because the glass is set on different angles these windows can catch sunlight from different directions. And the increased natural light will make your space feel bigger, brighter, and more welcoming. The sunlight can also improve circadian rhythms, health, and wellbeing.

  1. Added Space

Bay and bow fiberglass windows both give you some extra square footage inside your Seattle, WA home. Many homeowners choose to use this extra space for storage, window seats, or breakfast nooks.

  1. Enhanced Curb Appeal

These eye-catching window installations are sure to set your home apart. Passersby can’t help but notice the beauty of projection windows. And if you are looking to sell, these windows can go a long way towards boosting the perceived value of your home.

Disadvantages of Bay and Bow Windows

Along with the pros come a few cons of bay and bow fiberglass windows, including:

  1. Difficult Dressing

These windows are not easy to find coverings for. The best options are usually roll-down shades mounted inside the window frames. And while there are ways you can use curtain rods and drapes, it can get tricky and frustrating.

  1. Extra Weight

These window installations are heavy and you need to make sure your home can support the extra weight. That is why choosing a lighter, stronger material (like fiberglass) is important. And if the window is not properly installed it could lead to any number of serious problems, so make sure you get professional help.

  1. Unwanted Heat Gains

With more glass often comes unwanted solar radiation. This is especially true for larger window units like bay and bow windows. Fiberglass can help reduce heat infiltration, but you will also want to consider low-e glazing to also reduce energy loss.

Where Should I Install Bay and Bow Windows?

Most homeowners choose to install bay and bow windows in their living room, dining room, or bedroom. In these areas, you can take full advantage of the unique beauty and extra space these fiberglass windows can provide.

Where Should I Buy Bay and Bow Fiberglass Windows?

Signature Window and Door Replacement is an exclusive dealer for Infinity From Marvin® Fiberglass Windows in Seattle, WA. This means we can offer you the best styles and prices along with the best service possible. For more information contact 253-887-7792 or visit 22613 68th Ave S, Kent, WA 98032.

See What Your Neighbors Are Saying

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4.9
Based on 184 reviews
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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 🥰
happy couple holding hands outside home
happy couple holding hands outside home
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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