Pioneers in Fiberglass Window Replacement

We are Denver's oldest dealer of Infinity from Marvin Replacement Windows and Exterior Doors. Offering Installation for Residents of Denver, CO & All Surrounding Areas

A family tradition since 1973.

Gravina's Window Center of Littleton is a Family Owned and Operated Window Replacement Company for Over 45 Years, Built on Family Values.


If you’re in the Denver, CO area and need replacement windows, we can help. From replacing full frame windows to insert window installation, Gravina’s has you covered.  We offer the best fiberglass windows on the market, Infinity from Marvin.  With professional installation and a lifetime workmanship warranty, we do windows the right way.

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When it comes to patio doors, we offer our customers the best choices. Our collection of sliding patio and french doors is purposefully designed to help make a home that's distinctively yours.  No matter your taste, energy efficiency needs, or desires, we will find you a door that's just right.

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Ranked one of the top remodeling projects a homeowner can undertake regarding return on investment, selecting a front door is a fundamental part of designing your home's overall aesthetic.  We have what you want.

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Front Doors, Patio Doors & Storm Doors Professionally Installed for Homeowners in Denver, CO & Neighboring Communities

Proudly endorsed by Mark Schlereth

mark schlereth and gravinas window center








Infinity from Marvin fiberglass windows are highly durable

Fiberglass has an astounding strength-to-weight ratio, which is one of the reasons why it’s the material of choice for boats, bridges, guardrails, ladders, and hard hats.  Imagine a ladder or a bridge made from vinyl!

Unlike vinyl windows that are susceptible to sagging, warping, and chalking, fiberglass windows are created from glass fibers and resin. This composition gives the frame a structural integrity that outlasts most other materials and doesn’t need any maintenance. Even after prolonged exposure to the elements, fiberglass won’t rust, dent or corrode.  Which is perfect for your home and Colorado weather!

Introducing Ebony from Infinity.

You asked and we listened. We now are able to provide you a modern black exterior finish on the Infinity fiberglass windows. Better late than never we say.

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