Seattle Fiberglass Windows
Fiberglass windows are crafted from high-quality glass fibers, using materials like silica sand, limestone, and soda ash. This blend is intricately woven and set through a resin bath before being cured in a high-temperature die. Our unique manufacturing process results in windows that are not only strong but also offer superior insulation. With options for either foam-filled or hollow core frames, these windows maintain consistent temperatures by expanding and contracting at the same rate as the glass pane they encase. This feature significantly reduces air leaks and enhances durability, making fiberglass windows an excellent choice for Seattle homes. Opt for these energy-efficient windows to enhance your home’s curb appeal while reducing your carbon footprint and saving on maintenance over time.
Why Choose Fiberglass Windows?
| Material | Durability | Maintenance | Energy Efficiency | Cost | Environmental Impact | Sound Insulation | % Frame to Glass Ratio |
| Vinyl | Moderate | Low | Good | $ | Moderate | Good | Moderate |
| Fiberglass | High | Low | Excellent | $$ | Low | Excellent | High |
| Clad Wood | Very high | Low | Excellent | $$$ | Moderate | Excellent | Moderate |
| Wood | Moderate | High | Good | $$ | Low | Good | Low |
Fiberglass Window Benefits
- Fiberglass windows are the pinnacle of energy efficiency, making them the right windows for any energy-conscious homeowner.
- Known for their durability, these windows can last between 50-80 years, ensuring more money saved over time.
- Resistant to extreme temperatures and extreme heat, fiberglass does not warp, crack, or rust, requiring little maintenance.
- Available in a variety of styles and interior colors, fiberglass windows enhance your home’s curb appeal and suit any design preference.
- Fiberglass is an environmentally friendly choice, helping to reduce your carbon footprint and avoid harmful chemicals.
The Finest Fiberglass Manufacturer Chosen For You
Leverage our extensive experience and deep industry knowledge to your advantage. With more than 30 years in the window industry, we have meticulously selected a fiberglass manufacturer that consistently delivers the best combination of quality, affordability, and value. Our preferred manufacturing partner excels in four critical areas: consistency of quality and service through the years, comprehensive warranty support for you, proven industry longevity, and ongoing product innovation.
At Lake Washington Windows and Doors, our valued manufacturer partner for fiberglass windows is:
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The Milgard Ultra Series fiberglass windows are top-of-the-line when it comes to window technology. Fiberglass is an eco-friendly window material that provides the highest energy-efficiency levels available. Fiberglass is made primarily of silica sand, an abundant natural resource. Glass is made primarily of sand. Thus the frame and glass expand and contract at roughly the same rate while remaining resistant to swelling, rotting, and warping, allowing for a longer lifespan.
Features and Benefits:
- Extremely durable, with a lifespan of nearly 80 years, ensuring long-term value and low maintenance.
- Strong frame material supports large, custom sizes for expansive views and unique designs.
- Paintable frames allow homeowners to adapt their windows to align with evolving home color trends.
- Stable through 100-degree temperature fluctuations, resulting in fewer issues with glass and caulking over time.
- An Energy Star package tailored for the Seattle area enhances energy savings and comfort.
- Extensive customization options including custom colors, hardware, and glass styles to perfectly complement any home décor.
Milgard Ultra Series C650 Fiberglass Windows
| Window Configurations | Combinations | Hardware Features | Color Options | Grid Options | Glass Textures | Tint Options | Screen Options |
| Picture window Picture window 2-lites verticle Picture window 2-lites horizontal Picture window 3-lites verticle Picture window gable Picture window 3-lites horizontal Picture window gable triangle Picture window hexagon Picture window octagon Gable (3-side, 4-side, 5-side) |
4-sided gable and square picture windows Picture window over awning 4-sided gable windows over picture windows |
Folding Nesting Operator Sash locks |
Interior Colors White (any exterior color) Harmony (harmony exterior only Bark (bark exterior only) Black bean (black bean exterior only) Exterior Colors |
Interior Grids Flat GBG Grid Sculptured GBG Grid 3/4″ Vintage SDL 1-1/8″ Vintage SDL 1-1/8″ Craftsman SDL 1-1/8″ Legacy SDL Exterior Grids |
Obscure Aquatex Obscure Clear 42 Obscure Delta Frost Obscure Frosted Glue Chip Obscure Glue Chip Obscure Matelux Obscure Narrow Reed Obscure P516 Obscure Rain |
Cardinal Low-E Solar Bronze Solar Gray |
Standard Mesh PureView Mesh |
| Milgard Ultra Series C650 Fiberglass Picture Window Size Chart | |||||||
Comparing Fiberglass to Vinyl and Clad-Wood Windows
Compared to other window materials, we consider fiberglass the highest quality material available for your Seattle home. It provides optimal levels of performance and durability, along with many design options.
While fiberglass is more energy-efficient and durable than vinyl window materials, it’s also significantly more expensive. Because of this, we recommend fiberglass windows to homeowners who want the best material money can buy and vinyl windows for homeowners who desire comparable performance at a more affordable price. Finding the balance between performance and initial cost results in the maximum ROI from your new windows.
When deciding between fiberglass and clad-wood windows, the decision boils down to your design preference. While fiberglass outperforms vinyl clad-wood windows, they are better suited for modern home designs, whereas clad-wood windows are an excellent choice for traditional home designs.
Fiberglass Window Frames Available in a Range of Styles
It doesn’t matter what window style you’re looking for. At Lake Washington Windows and Doors, we offer vinyl replacement window options in 6 of the 7 primary home window styles, including
Fixed and non-opening, picture windows provide a clear, unobstructed view of the outdoors, allowing an abundance of natural light. They enhance the architectural aesthetic of your home, serving as a striking design focal point.
These windows are hinged at the side and open outward, offering superior ventilation. Easy to operate with a crank or lever, casement windows boast a tighter seal for excellent insulation.
Featuring a fixed top sash and a movable bottom sash that slides vertically, single-hung windows are a cost-effective and popular choice. They provide a traditional look and are simpler to install than more complex styles.
Hinged at the top and opening outward from the bottom, awning windows shield against rain while open and boost ventilation. Their unique design is ideal for adding airflow above doors or other windows.
With one sash sliding over another horizontally, these windows save space while offering ample ventilation. Perfect for areas with limited exterior space, like walkways, patios, or along busy streets.
Extending outward from the wall, bay and bow windows create a curved appearance that adds space, volume, and light to any room. They provide expansive views and serve as a dramatic centerpiece in spaces like living rooms, dining rooms, or master suites.
Tailored to fit unique spaces and design schemes, specialty shaped windows offer limitless possibilities for customization. These windows can be designed to fit virtually any dimension and shape, adding character and distinction to your home.
Top-Rated Window Replacement Services
At Lake Washington Windows and Doors, we offer the highest quality windows and unparalleled customer service, with over 800 5-star reviews. With each installation, our exclusive Leak Armor Installation provides superior protection around your window openings. When you choose us for your window installation project, you can be sure that you’re getting the best.
Financing Options with Convenient 10 Minute Approvals
In addition to special offers and promotions, ask our sales representative about our quick, digital financing application process. From low-interest traditional loans to no down-no payment-no interest deferred financing plans, we can help you fund your replacement window project so you can mobilize your cash for other investments. We are a proud partner of GreenSky, one of the largest lenders for the home improvement industry. See how much you can be pre-approved for.
Every Window Includes a Limited Lifetime Warranty
The beauty of working with the top window manufacturers in the industry is the support you can expect before, during, and after installation. Both Milgard and Andersen offer limited lifetime warranties. However, the likelihood that you’ll need to take advantage of these warranties is low.
Milgard Lifetime Warranty Guarantee
Milgard’s award-winning windows and doors are built to last. However, if you ever encounter an unexpected problem, you can rest assured that their lifetime warranties cover your purchase.
Andersen Limited Lifetime Warranty Guarantee
Andersen prides itself on crafting durable, long-lasting products. That resilience allows them to offer some of the best warranties in the industry. They're even transferable should you sell your home. With Andersen’s exclusive Owner-to-Owner® limited warranties, you get peace of mind plus real added value.
Receive Our Patented Leak Armor Protection with Every Installation
We include our patented Leak Armor protection with every window we install. Developed through thousands of customer installations and years of experience, we utilize layers of flashing, pans, and sealants in a specific manner to provide commercial-grade sealing to residential homes.
Fiberglass Window FAQs
Are Fiberglass Windows worth it?
The popularity of fiberglass windows is higher than ever. While the upfront cost is more significant, fiberglass provides benefits that vinyl windows do not. If you’re willing to spend the money upfront and reap the return on investment over time, then fiberglass windows are a worthwhile option for you and your home.
What style and color options are available with fiberglass windows?
Fiberglass is a versatile window frame material that can be molded and configured into most window styles. Milgard offers a range of interior and exterior colors, along with several different glass textures and window grids. Visit our window style page to explore the fiberglass options we provide.
Are fiberglass replacement windows durable?
Fiberglass windows do not damage easily. They will resist dents, scratches, warping, rotting, and corroding. The material is also strong and rigid, allowing fiberglass windows to be up to eight times stronger than vinyl windows and requiring much less maintenance.
How long does the fiberglass window installation process take?
At Lake Washington Windows and Doors, our installation process is down to a science. When embarking on a project with new customers, we generally schedule 2-5 days for installation, depending on the project size.
