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Family owned and operated since 1973!

Replacement Windows

Press Release

Gravina's Window Center of Littleton is the #1 Infinity from Marvin, Window Dealer of the Year!




Specializing in Fiberglass
Replacement Windows and Patio Doors

Every day, for over 35 years, Gravina's Window Center, has taken the time to build long-term relationships by helping their customers renovate their homes with the highest quality products and services.

Gravina's Window Center is committed to providing its customers the highest quality replacement windows and doors through the use of experienced sales staff, skilled craftsmen and courteous personnel. By providing fiberglass replacement windows to the front range area, Gravina's Window Center has set the standard in customer satisfaction only a third-generation family business can.

Replacement Window Innovations

About Gravina's

We are a family owned company serving the Denver Metro Area for over 38 years. Gravina's Window Center is a well-established company constantly recognized for outstanding service in window and door replacements. Here at Gravina's WIndow Center, we understand exactly how your window and door replacement needs will affect the comfort level of your home for years to come. Our top priority is for your window replacement project to go as smoothly as possible.

You can be absolutely confident that Gravina's Window Center will address your concerns and window replacement questions, allowing you to make an intelligent decision regarding your project. In addition, we will ensure that you have a clear understanding of all choices involved, including window styles, interior and exterior colors, and a myriad of other available options. In fact, we refer to our Littleton showroom as our "Window Education Center." We invite you to visit us and learn more about what we can do for your home improvement needs.

From our friendly office staff, to our sales team and installation technicians, everyone at Gravina's Window Center has the knowledge and experience to guarantee that your window replacement project will provide maximum results. You can relax knowing that we consistently follow up with you during the entire process to make sure that your overall experience with Gravina's Window Center exceeds your expectations and inspires you to recommend us to other homeowners.

Why fiberglass replacement windows are better than vinyl replacement windows?

Colorado's extreme climate is harsh on many things exposed to our elements, especially replacement windows. Our high altitude, irregular temperatures, and extreme exposure to ultraviolet light have all proven to be damaging to many replacement window materials. There are many reasons as to why fiberglass replacement windows are better quality than vinyl, but we'll spare you all of them and tell you about the big ones!
Fiberglass replacement windows have many advantages; however, the strength of a fiberglass replacement window in comparison to a vinyl is by far the most important advantage. One may not think that the strength of a replacement window is a big issue. After all, after the window is secured in place, the strength comes from the surrounding building materials. The real issue is how the window expands and contracts. Wood and vinyl replacement windows expand and contract with climate changes. You don't need us to tell you about Colorado's wacky weather! It's December and it's still 60 degrees out! You never know. We might get 3 feet of snow tomorrow. In any case, fiberglass windows have less chances of warping. In fact, fiberglass replacement windows are eight times stronger than vinyl. Yes, you read that correctly: EIGHT TIMES STRONGER!

Because fiberglass replacement windows can stand up to Colorado's weather, they will continue to look beautiful and perform much longer than vinyl or wood windows. Vinyl will show its age in the form of spots, streaks, and cracks. You will never have to sand, scrape, or paint the fiberglass. Unlike vinyl, fiberglass frame windows can be painted if you would like. At the same time, unlike wood windows, you do not HAVE to paint fiberglass windows. The result is a replacement window that will stand the tests of time.

And last but not least, fiberglass replacement windows are more "green" than vinyl replacement windows. With the cost of energy on the rise, it is important to have a window that meets the highest energy standards. Your windows may be losing up to 40% heating energy during the winter and 50% cooling energy during the summer-obviously not the most energy efficient. With fiberglass replacement windows, customers can expect their energy bills to be reduced by up to 50%. Fiberglass is the more environmentally friendly material as well. Fiberglass replacement windows are made with about 60% glass. And glass can be recycled. With fiberglass windows, you're saving money on energy bills while saving the environment. It's a win-win!

Milgard Tuscany Window

Marvin Ultimate Swinging French Door

Simonton Reflections 5500 Replacement Wiindow

Gravina's Window Center proudly offers Provia Entry Doors

2013 Super Service Award

Angie's List 2013 Super Service Award

Double Hung Windows – Why Are They So Popular?

How can I tell if a sliding door needs to be fully replaced or just the glass itself?

Simonton Reflections 5500 Replacement Window

Gravina Window Video

Video from Gravina Windows Denver




Flowers and Design

When is the best time to replace your windows?

Denver Home Show

Denver Home Show 2014

i89 Glass


Choosing a new window

Importance of Efficient Windows

Everwood Interior Finish

Gravinas Window and Siding

Marvin Bi Fold Doors

The Bi-Fold door is a simple, elegant solution for indoor/outdoor luxury living – opening wide to invite fresh air in. Configured from two to eight panels, Bi-Fold doors use an extruded aluminum track to fold smoothly to one side, stylishly and effortlessly connecting your space to the outdoors or to another room. Marvin Bi-Fold doors are ideal for making a dramatic connection with verandas, gardens and more — or expanding a room into adjoining interior areas.

Marvin Challenge for Windows


Hot trends in remodeling inside and outside

Coco+Kelly Tours Marvin Windows and Doors



Energy Award for Marvin Windows

Green your home with replacement windows


Stay warm this winter! with New Energy Efficient Windows

Secure your new entry door with a multi-point lock

Tools of the trade

Small Business Saturday Saturday 2014

The Marvin Way: Commitment and Quality At Every Step


Making use of your formal dining room for the holidays?

Customer service? It doesn't exist anymore

Spring Home Decor Projects

2015 Energy Star Partner of the Year

Interior Design Projects

Millenials are today's home buyer

Ellen Show and Houzz Team Up

Gravina's Window Service

Call now for service!

Remodeling trend brings the indoors out

J.C. Penney Co. among honorees in EPA’s 2015 Energy Star Partners of the Year

Andersen Double Hung Conversion Kits

Why Is R-Value Important?

Urban Blight Hack: Installing Windows And Doors On Abandoned Buildings Reduces Crime

Areas We Serve

Finishing Replacement Windows

2016 Colorado Garden and Home Show

2016 International Builders Show



What causes condensation in your home?

How can homeowners make the most out of home shows?

Gravina’s Window Center of Littleton Earns Esteemed 2015 Angie’s List Super Service Award

How can homeowners make the most out of home shows?

400 Series French Sliding Door

What do slider windows look like?


Gravina’s Window Center of Littleton Earns Esteemed 2015 Angie’s List Super Service Award

Why is James Hardie Siding so durable?

Trusted Contractor for James Hardie Siding Installation in Denver, Littleton, Boulder

What is the most energy efficient entry door in the U.S.?

Do you have Andersen Narroline Double Hung Windows in your home? Then make sure you read this article!

Our Signet fiberglass doors have taken fiberglass entry systems to the next level. The embossed woodgrain is an astonishingly accurate representation of real wood.

Top 10 Innovations in Window Technology

A-Series Window products from the Andersen Windows Architectural Collection provide the variety and options you need to achieve virtually any architectural style with true authenticity.

Infinity from Marvin Inswing French Door

Finally here, the Infinity from Marvin Inswing French Door

Fiberglass, Fiberglass, Fiberglass!

Will replacement windows really increase the value of your home?

We also do Marvin Patio Doors and Windows

Recent News

The 5th annual Qualified Remodeler GuildQuality Satisfaction Report

Click here for the Gravina's  in Denver Location


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