Colorado's Premier Marvin Windows & Doors Dealer Since 1973

Gravina’s Window Center of Littleton® has been serving Colorado since 1973. We’re a long-time Marvin partner and a local, family-owned company, so our reputation isn’t a slogan; it’s how we stay in business.

If you’re considering Marvin® Windows and Doors or James Hardie® fiber cement siding, we’ll help you choose the option that holds up in Colorado and install it to standards designed for long-term performance.

 

 

Why Denver's Most Discerning Homeowners Trust Gravina's Window Center of Littleton for Marvin Windows & James Hardie Siding

 

  • Colorado's Oldest Family-Owned Marvin Dealer - One of the nation's longest-standing Marvin relationships
  • Three Generations of Excellence - Family-owned and locally operated, serving the Mile High City for over 53 years
  • Marvin-Certified Installation Teams - Expert craftsmen, never subcontractors, trained in Marvin's exacting standards
  • A+ BBB Rating Since 1973 - Hundreds of 5-star Google reviews from satisfied Colorado homeowners across the Front Range
  • Comprehensive Product Expertise - Full Marvin collection (Signature™, Elevate™, Essential™, Modern™, Vivid™) plus James Hardie® premium siding
  • Transparent Process & Pricing - Clear proposals, accurate final measurements, and service that stands behind every window and door we install

 

Happy Denver homeowners after upgrading to Marvin Windows

Premium Marvin Windows & James Hardie Siding - The Perfect Pairing for Colorado Homes

When it’s time to improve your home, choose the company that’s been helping Colorado homeowners since 1973. Gravina’s Window Center of Littleton® is one of Colorado’s oldest Marvin dealers, and we’ve stayed true to our roots ever since. We want to answer all your questions and concerns about window and door replacement so you never have to worry again.

From your first consultation to the final walkthrough, our process is simple, transparent, and pressure-free. We don’t believe in shortcuts; we believe in getting it right. When you choose Gravina’s Window Center of Littleton®, you’re not just replacing windows, you’re partnering with Colorado’s Marvin® experts to elevate your home’s comfort, beauty, and long-term value. We believe in doing things the right way once and never having to do them again.

 

Family-Owned. Colorado Trusted. Since 1973.

At Gravina’s Window Center of Littleton®, we don’t just replace windows and doors, we provide peace of mind and have been trusted by Colorado homeowners for more than five decades.

We want to continue earning the trust of all Colorado homeowners, because without that trust we wouldn't be in business.

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Gravina’s Window Center of Littleton logo - Replacement Windows in Denver, CO

Three Generations. Thousands of Denver Families. One Trusted Name for Marvin Windows.

Gravina’s Window Center of Littleton has been Colorado’s most trusted name in window replacement since 1973. As one of Colorado's oldest Marvin Window dealers, we’ve helped thousands of homeowners across Denver upgrade their homes with confidence, style, and lasting performance.

From bifold patio doors to James Hardie Siding and ProVia entry doors, our team offers free, no-obligation consultations to help you find the right solution for your home’s unique needs.

Marvin windows are built to last - even in Colorado’s high-altitude climate. Available in a wide range of styles and finishes, these windows combine architectural beauty with performance that stands the test of time.

We proudly serve Denver with industry-leading products, including Marvin Windows, Infinity by Marvin Windows, James Hardie Siding, ProVia entry doors, and Marvin Bifold Patio Doors. Backed by an A+ rating from the Better Business Bureau, every installation is completed with care, precision, and pride.

 

 

Premium Home Exterior Replacement Services in Denver

As Colorado’s oldest Marvin dealer, we set the standard for quality, reliability, and performance in window replacement.

Denver’s Trusted Window, Door, and Siding Specialists

Colorado’s weather can be extreme; intense sun, freezing nights, sudden temperature swings. That’s why Marvin® Windows are engineered to outperform ordinary vinyl or aluminum options. Crafted with advanced Ultrex® fiberglass, Marvin products deliver long-term strength, lasting beauty, and energy efficiency that stand up to Colorado’s demanding climate.

 

  • Marvin Fiberglass Windows expand 87% less than vinyl and resist expansion and contraction in any climate.
  • Eight times stronger than vinyl  - protects the integrity of your home
  • Resistant to leaks, seal failures, and stress cracks – all things that can affect energy efficiency

infinity from marvin ultrex frames

  • Ultrex’s fiberglass windows and doors strength delivers narrow profiles for expanded views and more daylight
  • Our proprietary acrylic finish is fade-resistant and virtually maintenance-free
  • We offer a complete collection of styles, features, and options to complement any home and décor

Schedule Your Free Marvin Windows Estimate in Denver

Give us a call, and we’ll give you a free, no-pressure quote on Marvin Windows. Discover why so many Denver homeowners trust Gravina’s Window Center of Littleton to enhance their home’s beauty, comfort, and energy efficiency with expert installation done right the first time.

What Are Marvin's Fiberglass Windows?

Marvin® Fiberglass Windows are made with Ultrex® pultruded fiberglass - a material 8x stronger than vinyl and built to thrive in Colorado’s climate. These windows resist warping, leaks, and moisture damage to keep your home comfortable year-round.

Best of all, they’re virtually maintenance-free and built to stay beautiful for decades. Marvin replacement windows from Marvin offer clean lines, exceptional strength, and timeless style - inside and out.

Maximum Performance for Colorado Homes

With over 52 years of experience, Gravina’s Window Center of Littleton understands Colorado’s extreme conditions. Our Marvin fiberglass windows seal tightly, reduce energy loss, and enhance your home’s long-term value. We don’t just install windows, we deliver proven performance backed by local expertise.

Worry-Free Window Replacement

Denver homeowners can save on energy and elevate curb appeal with Marvin replacement windows and doors. These products are engineered for thermal performance with low-E glass coatings that resist heat and UV rays. Strong fiberglass frames handle snow, sun, wind, and everything in between.

Choose from a variety of styles and colors to refresh your home’s look. With better insulation, you’ll enjoy year-round comfort and long-term energy savings. Investing in Marvin Windows means smart performance that pays you back every season.

Marvin Patio Doors

Upgrade your indoor-outdoor flow with Marvin fiberglass patio doors. These doors deliver long-lasting beauty, smooth operation, and improved energy efficiency, keeping your home warmer in winter and full of natural light in summer.

Our team installs every patio door with care, precision, and zero hassle. Whether you want sliding or hinged, classic or modern, Marvin patio doors offer security, style, and durability you can trust.

James Hardie Siding

James Hardie siding offers exceptional performance and design flexibility for Colorado homes. It resists warping, pests, and fire, and it looks great doing it. Choose from a wide range of colors and textures to match your aesthetic.

For those looking to invest in James Hardie Siding, make sure you choose an experienced installer. Improper installation can shorten the product’s lifespan, while a seasoned team (like ours) ensures flawless results and long-term protection.

Marvin Fiberglass Replacement Windows

Marvin fiberglass windows are engineered for beauty, strength, and resilience. With Marvin's fiberglass replacement windows made from Ultrex® pultruded fiberglass, you’ll get years of reliable performance and a crisp, modern finish that never warps or rots.

Each window is built with advanced weather-resistant technology to block drafts, resist moisture, and handle Colorado’s harshest conditions. With Marvin, you get premium fiberglass windows that look incredible and require almost no maintenance, built to last, made to perform.

 

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Our Promise to You

At Gravina’s Window Center of Littleton®, we’ve earned the trust of Colorado homeowners for over 53 years, one window, one door, and one home at a time. We don’t just install Marvin Windows; we stand behind every job as if it were our own home. From your first call to your final walkthrough, we’re committed to honest work, great service, and craftsmanship that lasts. Thanks for considering us. Whether it’s one window or a full-home replacement, we’re honored to help you improve your life.


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