Why Choose Marvin Windows for Your Denver Home?
Living in Denver means dealing with scorching summers, fast-moving storms, and winter cold snaps. Marvin® windows are made to handle it all. Their durable materials and energy-efficient engineering help regulate indoor comfort, reduce draftiness, and make your home look its best year-round.
Marvin Windows and Doors are sold through independent dealers, like us. At Gravina’s Window Center of Littleton®, we’ve been helping Colorado homeowners choose the right Marvin products since 1973. That means you’re not just buying a window, you’re getting a partner with local expertise, a reputation for craftsmanship, and a commitment to service long after installation.
Expert Marvin Window Installation Services
The performance of your Marvin® windows depends on the quality of the installation. Our Denver-based certified team ensures every window is measured, fitted, and sealed with exacting precision — preventing drafts, improving energy efficiency, and protecting your home for decades.
We offer the full Marvin lineup, including:
- Marvin Signature® Collection - Architectural detail and unlimited design possibilities
- Marvin Elevate® Collection - Strong fiberglass exteriors with warm wood interiors
- Marvin Essential® Windows - Clean lines, low maintenance, and exceptional value
- Infinity® from Marvin® Windows - Proprietary Ultrex fiberglass, composed of millions of fiberglass strands
From consultation to final inspection, we make the process easy, transparent, and tailored to your home.
Energy-Efficient Marvin Windows: Save on Utility Bills
Marvin’s high-performance glass options are engineered for Colorado’s climate, reducing heat loss in winter and blocking excess solar gain in summer. Many homeowners see noticeable reductions in heating and cooling costs after upgrading.
Marvin Patio Doors
Pair your new windows with Marvin patio doors for a seamless look and smooth operation. Options include sliding, swinging, and scenic doors that frame your view while keeping your home secure and efficient.
Explore Our Range of Marvin Replacement Windows
Marvin® windows are made for homeowners who value detail and won’t compromise on their vision. The Marvin Ultimate collection delivers exquisite design, precision craftsmanship, and a broad selection of shapes, sizes, and finishes—adaptable to any architectural style. Whether your home is traditional, contemporary, historic, or craftsman, Ultimate windows and doors bring beauty and performance together.
For those seeking unmatched durability and minimal upkeep, our Marvin fiberglass windows are an excellent choice. The Ultrex® fiberglass material is eight times stronger than vinyl and resists warping, cracking, and fading, even after 48,000 hours of direct sunlight. It expands 87% less than vinyl, which helps prevent leaks and seal failures, making it ideal for Colorado’s shifting weather.
Ultrex fiberglass combines lasting strength with energy efficiency, helping your home stay comfortable year-round while reducing maintenance needs. Whether you’re replacing outdated windows or starting fresh with new construction, Marvin fiberglass windows offer a smart, long-term investment in your home’s comfort and value.
Energy-Efficient Marvin Windows: Save on Utility Bills
Energy efficiency isn’t just about lower utility bills—it’s about creating a more comfortable, sustainable home. Marvin® windows are engineered with high-performance glass and precision-built frames to keep your indoor temperature stable year-round, reducing the strain on your heating and cooling systems.
When you choose Gravina’s Window Center of Littleton® for your installation, you’re also backed by our service and product warranties, ensuring your investment delivers value for years to come. It’s quality you can see, feel, and count on—season after season.

With our unparalleled focus on both performance and aesthetics, we proudly present a wide range of window options designed to suit any style of home, regardless of the climate. Whether you prefer the timeless appeal of a classic double hung or single hung window, the elegance of French Push Out Casements, the convenience of hopper windows, or even industry-leading sized casements, our innovative window solutions provide an extensive selection of styles. Our commitment to excellence extends beyond design options - we also offer high-quality materials and the ability to mix and match across our product lines. This ensures that you can find the perfect combination of form and function for all your residential, commercial, and replacement needs. As an authorized dealer of Marvin Windows in Denver, we are proud to bring these exceptional products to your doorstep.
The Marvin Signature™ Ultimate Glider window provides quality craftsmanship and contemporary styling for a clean, streamlined and space-saving design where swinging windows won’t work, or as an egress option for bedrooms. Marvin’s exclusive automatic locking system features an easy-to-reach hide-away handle that blends seamlessly into the sash. One hand easily unlocks and opens the window, and automatic locking when closed provides convenience with added peace of mind. Choose from two or three operational panels across, or a combination of operational and stationary panels for different size and operating needs.
The Marvin Signature™ Ultimate Casement window is offered in some of the largest sizes in the industry, with a secure multi-point lock, durable hardware that ensures smooth operation, and Marvin's exclusive wash mode for easy cleaning even on upper floors. With many design options, including round top shapes, the Ultimate Casement window flexes to fit your vision and can be sized to complement the most expansive views.
Marvin Patio Doors
The Marvin Signature® Ultimate Bi-Fold Door opens a home to true indoor/outdoor living, with panels that fold open and closed like an accordion. Because weather and the seasons don’t always beg for a wide-open expanse, choose a configuration with a single swinging access door allowing for quick and convenient everyday operation. When it’s time to open up the room and let views and fresh air in, expansive widths of up to 55 feet make the Ultimate Bi-Fold Door one of the largest folding doors in the industry.

Customer Testimonials for Marvin Windows in Denver
All the service I received at Gravina’s was so great. I plan to use them again for a door in the near future. Thanks to all.
52 Years of Window and Door Experience
Since 1973, Gravina’s Window Center of Littleton® has been family-owned and operated, earning the trust of Colorado homeowners with expert installation, premium products, and service that stands the test of time. With more than five decades of hands-on experience, we know how to match the right Marvin® windows and doors to your home’s style, performance needs, and budget.
From material selection to energy efficiency, we offer the full range of Marvin options and guide you through every step of the process. Request your free estimate today and discover why we’re one of Denver’s most trusted window installers.
Installation Warranty
When you invest in Marvin windows and doors, you’re choosing products built from the highest quality materials. We stand behind that choice with our comprehensive installation warranty, giving you confidence and peace of mind for years to come.
It’s our way of ensuring that your window and door replacement isn’t just an upgrade—it’s an investment you can enjoy without worry.
Gravina’s Window Center of Littleton® can answer your questions, provide design recommendations, and prepare a clear, detailed quote. As the oldest Marvin dealer in Denver, we understand what it takes to deliver exceptional window and door performance in Colorado’s unique climate.








