Marvin Infinity Replacement Fiberglass Windows

Gravina's Window Center of Littleton® is the oldest Authorized Infinity window replacement company in Colorado.  Headquartered in Littleton, CO, we serve the entire Denver Metro area and the majority of the Front Range. We offer free consultations on replacement windows, patio doors, entry doors, and James Hardie Siding. As an A+ Better Business Bureau Rated Company, family-owned and operated company, we constantly strive for excellence with outstanding installation of Infinity fiberglass window and door replacements.

Expert Infinity Window Installation

Transform the appearance of your Colorado home with the professional services of Infinity from Marvin replacement window companies. Our experienced and knowledgeable window replacement experts provide a stress-free installation process from start to finish. Choose from high-quality Infinity fiberglass window materials for an impeccable transformation that will bring renewed joy to your home's appearance. Trust the experts at Gravina's Window Center of Littleton® to deliver exceptional results.


Is it time to replace your windows?

Inefficient and drafty windows and doors affect your home in many different ways. With energy costs getting higher, it may be necessary now, more than ever, to invest in replacement windows.  Get your window and door replacement projects done professionally - by trusting the experts at Gravina's Window Center of Littleton®. We offer full-frame Infinity windows suitable for any home style, no matter when it was built! Our efficient process ensures the best quality finish while causing minimal disruption to your space. Enjoy a seamless experience from beginning to end — trust us with all your window upgrade needs!

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Trusted Family Owned gravinas windows

Infinity's Ultrex fiberglass window strength delivers

As a long-time provider in the Colorado window replacement market, we have seen firsthand how vinyl windows can cause problems for homeowners. Vinyl fails to stand up under our fluctuating weather conditions, drastically hindering your window investment's durability and longevity - costing you more down the line with future replacements.  Marvin Infinity windows are crafted with the highest quality Ultrex fiberglass to provide superior strength and long-term performance.  Infinity Windows created Ultrex fiberglass with one goal in mind: to develop the most durable window and door material in the industry.  It's 8x stronger than vinyl, so it stands firm even in extreme temperatures or drastic weather changes - giving you a tight fit that won't budge! With its durability and performance, you can be confident knowing your window will remain secure for years. When customers choose Infinity from Marvin replacement windows, they know they will never have to worry about how they perform.  Infinity from Marvin Windows with Low-E Glass and Argon meet Energy Star requirements. Backed by Marvin Windows, homeowners are getting windows that are "Built for Life!".  Experience Colorado’s most reliable window replacement with Infinity fiberglass windows.


Infinity window and door advantage

Infinity replacement windows offer more than just exceptional views and outstanding durability. Crafted from Ultrex fiberglass, these narrow frames give you the best of both worlds with an expansive glass area that lets in natural light while providing years of reliable performance – something only a company like Marvin, with nearly two decades worth of knowledge, can bring to your project. Experience quality construction backed by superior materials: why choose anything else? Experience Infinity's advantage for superior windows and doors that boast expert craftsmanship, authoritative reliability, and a trustworthiness to last.





Why Choose Infinity Fiberglass Windows for your Home?

From patio doors to window replacement, choosing the best fiberglass windows is a no brainer.  Our Infinity fiberglass replacement windows and Infinity patio doors are designed to fit your project plans perfectly. You can count on each fiberglass window replacement to be durable, energy-efficient, and secure.  Available in a variety of sizes and shapes. As Infinity's oldest replacement window company in the country, Gravina’s Window Center of Littleton® offers the full line of Infinity from Marvin replacement windows. Made of Ultrex® fiberglass, Marvin’s patented pultruded fiberglass, Infinity windows combine the best strength, comfort, and energy savings on your utility bills for Denver homeowners.

What are Infinity Windows?

The Infinity Window is Marvin's fiberglass line of windows that offers various flexible and customizable replacement window and door options. Infinity windows are intended to replicate the look of standard wood windows and doors while affording contemporary features and low-maintenance performance. Get the best for your home with Infinity from Marvin Windows. Crafted to ensure peak performance, these premium fiberglass windows and doors bring reliability you can trust - all backed by Gravina's Window Center of Littleton®.

Finish and Colors

Make your home stand out with Infinity's top-of-the-line acrylic window finishes and color options. Our unique finishes are three times thicker than other windows, allowing you to enjoy all the beauty of traditional wood looks without any hassles - no more sanding, scraping, or painting required! Get exceptional protection, style, and performance combined into one unique design that won't disappoint you.

Exterior Options

Infinity by Marvin is the ideal long-term solution for your home's exterior, delivering superior performance and durability to keep its look beautiful year after year. Our proprietary acrylic finish resists dents, scratches, scrapes and fading - ensuring a lasting luster that retains it curb appeal.

Interior Options

Infinity provides the ultimate protection for your home with a fortified acrylic finish that defends against wear and tear inside as well. For those who prefer real wood, you can also select their stainable EverWood® option.

Infinity from Marvin Partnership

The value of any Infinity from Marvin® window or door goes far beyond the quality of its materials and construction.  There’s a reason you won’t find Infinity from Marvin windows and doors in the big box stores.  It’s only through independent window installers like Gravina's Window Center of Littleton® that can offer an unparalleled level of support and expertise. Choosing and installing replacement windows properly involves a lot more than people can imagine. We work only with homeowners to find the best solution to beautify your home and improve the curb appeal.


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Don't forget to ask about our current offers and special financing options for Infinity from Marvin replacement windows and doors!

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*With approved credit, special offers are not valid for previous customer orders and cannot be combined with any other discounts or previous special offers. Subject to credit approval. Not valid with other offers or estimates. Minimum purchase of (4) Infinity Windows. $500 off Infinity Patio Doors. The offer expires on 9/30/23. *Discount applied by retailer representative at the time of contract execution and applies to purchase of  Infinity windows; and  Infinity patio doors.   Only Marvin, James Hardie, and Provia product lines are eligible for the offer. It cannot be combined with other offers. To qualify for a discount offer, initial contact for a FREE Window and Door Estimate must be made and documented on or before 9/30/23, with the appointment no more than 14 days after the initial contact. The Infinity window and door replacement experience. Financing available to qualified homeowners; not all customers may qualify; higher rates apply for customers with lower credit ratings: No interest payments for 0-12 months.  Interest accrues from the date of purchase but waived if paid in full within 0 to 12 months. Any finance terms advertised are estimates only.



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Window and Door replacement made easier with Infinity from Marvin

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