Marvin Infinity Windows

Fiberglass Replacement Windows by Infinity from Marvin

Have you been looking for the perfect replacement windows but don't know where to start? Look no further. Marvin Windows has got you covered with their iconic Infinity Windows — offering superior engineering and craftsmanship, along with energy efficiency that lasts a lifetime. Trust Marvin Infinity Windows – their expertise in window design will ensure your home experiences ultimate comfort and savings.  With their patented Ultrex pultruded fiberglass technology, you can have the beauty of wood windows with no maintenance. Infinity from Marvin has the Everwood Interior Option that paints and stains like real wood. With Marvin Infinity windows, you can enjoy the highest level of protection for your home - a limited lifetime warranty.

Upgrade your old windows to keep the cold outside and experience comfort like never before! With Infinity from Marvin replacement window products offered by Gravina's Window Center of Littleton, you can be sure that you are getting top-of-the line quality for a beautiful home remodel.

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You can rest easy knowing that we offer the best warranties in the industry.

Our company provides customers with a sense of security when investing in our products and craftsmanship by offering some of the most extensive warranties in the industry.

replacement window warranty from gravinas windows

Marvin Infinity Windows

Infinity Windows and Doors

From the minute you start your window and door replacement project with Infinity®, every step of the process is a breeze. Gravina's Window Center of Littleton is experienced experts who provide one-stop shopping – ensuring that everything will be handled precisely and accurately. We offer a free initial consultation and hands-on expertise through delivery and installation, ensuring every detail is managed according to your liking. With Infinity®, it gives you tremendous peace of mind as we're with you from start to finish.

When it comes to window replacement companies in Colorado, few can match the high-quality products, skillful installations, and superior customer service given by Gravina's Window Center of Littleton. With this award-winning combination, we have helped homeowners throughout the region boost the comfort and curb appeal of their homes by swapping out their old, unsightly, or broken windows for elegant, modern, and more energy-efficient replacements. In our many years in business, our team has encountered window replacement projects of almost any size and scope. All completed each using our unique installation process.

When you select Gravina's Window Center of Littleton for the home window replacement installation, you will be able to choose from all of Marvin's Infinity fiberglass window and door products to meet your specific needs.


Infinity from Marvin offers the following fiberglass window styles for homes.

  • Awning windows are hinged at the top and open outward diagonally. This design offers maximum airflow and allows rain to slide off when opened during storms.
  • Bay windows: These windows have three panels set at 30- to 45-degree angles that protrude from your home. They offer architectural interest and create additional interior space for seating or storage.
  • Bow windows: Similar to bay windows, these form a 3D shape but have a more curved angle. 
  • Casement windows: These windows attach by one or more hinges on the side and open to the left or right. 
  • Double-hung windows: These windows have a movable upper and lower sash for maximum ventilation and easy cleaning. 
  • Round top windows: These fixed windows come in a half-moon shape and add decorative touches to any room. 
  • Single-hung windows: This style has a movable lower sash and fixed upper sash for added security, especially in ground-floor rooms. 
  • Single-hung round-top windows add a quarter or half-moon arch to typical sing-hung windows.
  • Slider windows: Also known as glider windows, these move along a track to the left or the right and work best in rooms with limited space. 
  • Unique shape windows: These decorative fixed windows come in various shapes, including pentagons, trapezoids, and octagons.

Infinity also offers in-swing French, sliding French, patio, and bi-fold doors.


Gravina's Window Center of Littleton Exceeds Expectations When It Comes to Window Replacement

Regardless of the style of window you desire for your residence, you can rest easy knowing that your new windows are assembled and supplied by some of the most trusted manufacturers in the window replacement industry – Infinity Windows, and Marvin Windows. Our cutting-edge windows are designed for top performance with a combination of energy efficient glazing options such as Low E2, Low E3, or the exclusive LowE366/ERS coating. Make sure your home is fitted with only the best.  What’s more, the glass panes in Marvin’s Ultrex® fiberglass frames, which are both durable and low maintenance, assuring that your new windows are built to last.

Total Experience - Gravina's Window Center will replace your home's windows for you and make them look great again.

Gravina's Window Center of Littleton offers a painting and staining service that ensures your new windows perfectly match the existing interior color scheme and outside trim work of your home. Additionally, we typically perform full-frame replacements, which means we will remove your entire window – frame and all – and replace it with a new frame and trim to give your home a fresh, updated appearance.

Creating the best fit for your home with the best window on the market - Marvin Infinity Windows are a better investment than Vinyl

Marvin Infinity windows and doors are made of fiberglass and are suited for Colorado's weather.  We hear all the time about homeowners who have vinyl windows in their home and they are leaking and sagging in under 10 years.  So vinyl windows may be cheaper to start, but in the long run, you most likely will have to service and replace them again.  This costs you more so you might as well invest in a better window from the start.  Infinity is the best window for Colorado, hands down.

Energy Savings - Marvin Infinity Windows can save on heating and cooling costs

Infinity windows can cut heating and cooling costs by 11 to 37 percent.*   This is why we don't sell 50 lines of windows.  We trust fiberglass in Colorado, plain and simple.  We have the track record to prove it too.  As one of the oldest fiberglass window dealers in the country, we have had the opportunity to see how durable fiberglass is in our climate.  Unlike vinyl or wood, with Infinity you only have to replace your windows once, saving you more money in the long run.

Marvin Infinity Windows in Colorado

With over half a century of experience, Gravina's Window Center of Littleton is the ultimate source for replacing windows and doors. Our family-owned small business takes pride in providing outstanding customer service as well as top quality Marvin Infinity products skillfully installed by experts you can trust.


infinity windows

Gravina's Window Center of Littleton® offers reliable installation and replacement services for Infinity from Marvin windows to homeowners in Colorado. The windows feature Ultrex® fiberglass frames for durability and excellent performance. Our cost-effective window replacement options ensure quality services that exceed expectations. Choose our family-owned business and experience the best window replacement services in Denver, CO.


*Source: Efficient Windows Collaborative

**For J.D. Power 2019 award information, visit



Marvin Infinity Windows


Infinity Windows Catalog

Options and sizing for Infinity windows and doors.

(36 pages)