Premium Marvin Window Replacement for Wisconsin Homes

Why settle for standard vinyl when you can have Infinity by Marvin?

  • Ultrex Fiberglass Strength
  • 8x Stronger Than Vinyl
  • Wisconsin Weather-Proof
  • Book Expert Consultation
  • Diamond-Level Infinity by Marvin Partner
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Replacement Windows From Infinity by Marvin in Green Bay & Appleton, WI



Why should you choose Infinity by Marvin for your replacement window project?



    • COLOR MATCHED TO YOUR INTERIOR TRIM Exclusive to Infinity, Everwood® is a wood grain interior finish that we professionally stain to match your existing woodwork. It looks and feels just like real wood but does not require the sanding, scraping and maintenance of wood.

    • STRENGTH Ultrex® fiberglass is 8 times stronger than vinyl and 3 times stronger than Fibrex® from Renewal by Andersen.

    • ENERGY EFFICIENCY Infinity by Marvin made with Ultrex® fiberglass boasts some of the best energy efficiency ratings in the industry.

    • LASTING BEAUTY Infinity windows and doors have a superior finish that outlasts all the competition. Infinity’s patented, mechanically bonded finish is up to 3 times thicker than competitive finishes and provides superior resistance to scratching and UV degradation, even on darker colors.

    • BETTER VIEWS The superior strength of Ultrex® fiberglass also allows for a narrower window frame profile and more glass area than other replacement windows, giving you more daylight and better views.

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Choose your PERFECT WINDOW!

Double Hung

Double Hung

Offers two window sashes that move up and down for more ventilation

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Single Hung Round Top

Single Hung Round Top

The beauty of a round top with effortless sliding operation

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Slider

Slider

Smooth rolling operation allows you to easily slide open from side-to-side

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Casement

Casement

Offers maximum views with a slimmer profile and a frame that swings outwards to invite more of the outdoors in

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Awning

Awning

Hinged on top of the frame to swing outward — perfect for a tight spot

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Bay

Bay

Built to capture light from three angles and can vary in size from big sunlit areas to a small, cozy reading nook

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Bow

Bow

Use a gentle curve built to capture light from multiple angles and completely open up a room

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Special Shape

Special Shape

Create additional decorative touches for your home — or complement existing windows and doors

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Round Top

Round Top

Add abundant natural light and visual interest to your home Use a gentle curve built to capture light from multiple angles and completely open up a room

Round Top

Single Hung

Single Hung

One of the most popular window types is the single hung window.

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Why should you choose Infinity by Marvin for your replacement window project?



Infinity replacement windows and doors are made from Ultrex® fiberglass. A patented pultruded fiberglass with a bonded acrylic finish that is as strong as steel. Ultrex® fiberglass is a proprietary product created by Marvin for the manufacturing of Infinity windows and doors and is not available from any other manufacturer.  The strength of Ultrex® translates into superior stability, long-term ease of operation, low maintenance, and superior performance.  There is no other window and door framing material that comes close to matching the strength and beauty of Ultrex® fiberglass.  Infinity by Marvin products are truly built for life.



Infinity Replacement Windows

Infinity replacement windows are designed to replicate the look of traditional wood windows while providing modern features and low-maintenance performance. Made of Ultrex®, Infinity’s tough, energy-efficient windows and doors are customizable to meet the needs of any replacement window project. The Windows of Wisconsin team of window experts ensure the ideal window selection for your home, formulate custom stains to match existing woodwork, and perform hassle-free installation.

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Why Marvin’s Infinity Windows Are The Best

Windows of Wisconsin is extremely proud to offer Infinity by Marvin windows. These windows truly are better than their competitors. Don’t believe us? Read on to learn more and reach out to us. Our staff is happy to demonstrate the superiority of Infinity by Marvin windows. Infinity by Marvin windows have been leading the window industry for more than 20 years. They have the highest quality craftsmanship and utilize superior materials. This combination offers unbeatable window durability and make it an ideal choice for your home.



Infinity by Marvin Windows Offer Superior Craftsmanship and Window Materials

Windows of Wisconsin is an official replacement window retailer for Infinity by Marvin windows, which is the best replacement window in the industry with many great features. The replacement windows are made from Ultrex® fiberglass, which is a pultruded fiberglass material that is stronger and more durable than other window materials. Infinity by Marvin fiberglass windows are leaders in strength, finish, energy efficiency, and durability. Infinity by Marvin windows are a worry-free solution that provides natural light, fresh air, and a strong seal to keep your home at the ideal temperature.



Strength of Infinity Replacement Windows from Marvin

There are several components to a replacement window and the most important component is the window frame itself. If the window frame fails then the entire window will need to be replaced. The window frame will also affect its energy efficiency, ease of operation, security of your home, and the aesthetics of the window. Doing a little research and choosing a window based on that will have long-term benefits and ensure a long lifespan for your windows.

Infinity Replacement Windows from Marvin window frames are made with Ultrex® which is as strong as low carbon steel and 8x stronger than vinyl. It requires diamond edge blades to cut it to size. This translates to superior stability, long-term ease of operation, minimal maintenance, and superior performance.



Best Finish on Infinity Replacement Windows from Marvin

Ultrex® fiberglass is the substrate material the Infinity replacement window from Marvin is made from and a patented co-extruded acrylic cap is mechanically bonded directly on the Ultrex® fiberglass. This acrylic finish results in a superior aesthetic that is unbelievably durable and will never need painting. In fact 48,000 hours of sunlight won’t fade the superior finish of Infinity replacement windows from Marvin.

The window frame finish is also 3x thicker than competitive finishes and it won’t crack, chip, dent, or peel. No sanding, no scraping, and no painting required. It is easy to visibly see the difference in finishes when you compare the Infinity window with competitor’s painted fiberglass finishes. Infinity replacement windows from Marvin are the longest-lasting, best-looking, and lowest-maintenance window in the industry.



Best Finish on Infinity Replacement Windows from Marvin

Ultrex® fiberglass is the substrate material the Infinity replacement window from Marvin is made from and a patented co-extruded acrylic cap is mechanically bonded directly on the Ultrex™ fiberglass. This acrylic finish results in a superior aesthetic that is unbelievably durable and will never need painting. In fact 48,000 hours of sunlight won’t fade the superior finish of Infinity replacement windows from Marvin.

The window frame finish is also 3x thicker than competitive finishes and it won’t crack, chip, dent, or peel. No sanding, no scraping, and no painting required. It is easy to visibly see the difference in finishes when you compare the Infinity window with competitor’s painted fiberglass finishes. Infinity replacement windows from Marvin are the longest-lasting, best-looking, and lowest-maintenance window in the industry.



Color Matched Windows with Everwood® Finish

The Infinity replacement window from Marvin is color matched to existing trim. Everwood is an engineered finish that looks and feels like real wood. However it is inorganic and impervious to moisture which means the window finish requires virtually no maintenance. Windows of Wisconsin custom color matches the Infinity replacement windows from Marvin so that it matches the existing trim in your home. The colors are custom formulated at Windows of Wisconsin and stained prior to window installation. Infinity Windows from Marvin have been leading the window industry for more than 20 years. They have the highest quality craftsmanship and utilize superior materials. This combination offers unbeatable window durability and make it an ideal choice for your home.

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5 Steps To Success

Expert Consultation

A WOW expert will provide a no pressure consultation to determine your needs, answering all your questions and providing a detailed project quote.

The Perfect Fit

A measure technician will review your order, measure openings, and verify your needs. Your windows will then be built to your exact specifications.

Built For Life

Enjoy our industry leading lifetime warranty and supportive customer service that ensure your windows last a lifetime.

Final Inspection

A WOW Project Manager will inspect the installation for any issues and ensure your project meets our quality standards.

 

Seamless Installation

WOW employed installation professionals will remove and dispose of your old windows and replace them with your custom color matched windows.

 



The Experts Agree

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Fiberglass Replacement Window Types

Learn more about each replacement window type that Infinity by Marvin manufacturers including colors, configurations, and other options.

    • Awning

    • Bay

    • Bow

    • Casement

    • Double Hung

    • Round Top

    • Slider

    • Special Shapes

BEFORE
AFTER

FAQs Related to Windows

Accurate measurement is critical to ensuring a proper fit and long-term performance. We take detailed, professional measurements of each opening, accounting for frame condition, structural variations, and insulation needs. This level of precision is especially important in older homes throughout northeast Wisconsin, where openings are rarely perfectly square.

Wood windows can offer a beautiful, traditional look, but many modern homeowners in the Fox Valley prefer alternatives like fiberglass for better durability and lower maintenance. We often guide clients toward high-performance materials that deliver the warmth of wood aesthetics without the upkeep, ideal for Wisconsin’s changing seasons.

Yes. Older ones can benefit greatly from black frame replacement windows, particularly if you want to modernize the inside while maintaining the space’s unique character. Because Marvin’s Infinity windows are customisable, it’s simpler to match the style and design objectives of your house.

Front-facing windows play a major role in curb appeal and natural light. Before replacing one, it’s important to consider style, proportions, and energy efficiency. We work with homeowners across northeast Wisconsin to select windows that enhance the home’s appearance while improving comfort and value.

Look for a company with strong local experience, premium product offerings, and a reputation for craftsmanship. In northeast Wisconsin, Windows of Wisconsin is known for delivering a personalized, high-end experience, from consultation through installation, tailored to each home.

Yes, but it’s important to focus on long-term value rather than just upfront cost. Windows of Wisconsin offers solutions that balance performance, durability, and design, helping homeowners in the Fox Cities invest wisely in their homes without compromising quality.

Fiberglass windows, such as Infinity by Marvin, are considered a premium option due to their strength, energy efficiency, and longevity. Costs vary depending on size, customization, and installation, but many homeowners in Green Bay and Appleton choose fiberglass for its long-term return on investment. We provides tailored estimates based on your home and goals.

Both are well-known brands, but Infinity by Marvin windows stand out for their Ultrex® fiberglass construction, which offers exceptional strength, stability, and resistance to Wisconsin’s temperature extremes. At Windows of Wisconsin, we often recommend Infinity for homeowners seeking a durable, low-maintenance, and high-performing window solution.
Ultrex® fiberglass, which is eight times stronger than vinyl and three times stronger than Fibrex® from Renewal by Andersen, is used to make Infinity by Marvin windows. Strong energy efficiency, a thicker, long-lasting finish, and slimmer frames for more glass area and improved views are also highlighted.

While replacement windows are available through various sources, working with a specialized company like Windows of Wisconsin ensures expert guidance, custom sizing, and professional installation. Homeowners in northeast Wisconsin benefit from a more tailored, hands-on experience compared to big-box options.

High-quality replacement windows can last 20–40 years or more, depending on materials and installation quality. Fiberglass windows, in particular, are known for their longevity. We installs products designed to perform reliably in Wisconsin’s climate for decades.

Window replacement costs vary widely $1000 to $5000 per window depending on the number of windows, materials, and level of customization. In northeast Wisconsin, homeowners typically invest more for premium solutions that enhance energy efficiency and home value. We provides detailed consultations to help you understand your investment.

For many homeowners, absolutely. Fiberglass windows offer superior durability, minimal expansion and contraction, and excellent energy efficiency, making them ideal for Wisconsin’s climate. We frequently recommends fiberglass for homeowners seeking long-term performance and a refined look.

A professional installation should be clean and well-managed. At Windows of Wisconsin, we take care to protect your home during the process and thoroughly clean up afterward. Most homeowners in the Fox Valley are surprised at how smooth and minimally disruptive the experience can be.