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  • Windows
  • Patio Doors
  • Entry Doors
  • Siding

There are many advantages to replacing your inefficient windows with Infinity from Marvin fiberglass replacement windows.

Created for the homeowner who wants low-maintenance, energy efficiency and traditional beauty, this product will add value and beauty to your home, reduce costly maintenance, and save you money on your utility bills.

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Patio doors are one of the most used doors in a home. They need to be able to withstand the constant abuse of entering and leaving, opening and closing, and of course our extreme weather conditions here in Colorado.

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Our most popular entry doors are made of fiberglass. A fiberglass door simply outperforms other doors; they won't crack, swell, split, rot, dent, ding, or rust. They are designed, built, and tested to the industry's highest standards.

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Damage resistance from cold, windy, wet and extreme seasonal temperature variations, James Hardie Siding uses a system that specifically engineers the perfect product for our climate. James Hardie Siding provides long lasting protection with very little maintenance.

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 gravinas best

    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 their customers the highest quality replacement windows and doors through the use of an 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.




Gravina's Window Center is your exclusive dealer for Infinity from Marvin® windows, made from proprietary Ultrex® pultruded fiberglass.  With over 50,000 satisfied homeowners preferringInfinity replacement windows, we are confident that you too will be thrilled to have them in your home!

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Gravinas Window Center
Phone: 303-794-0490
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89 W. Littleton Blvd.
Littleton, CO 80120




Monday - Friday 8am - 5pm
Saturday 9am - 3pm

After hours
by appointment

Family Owned, Serving the following areas:

Denver Front Range | Littleton, Co | Wheat Ridge, Co | Lakewood, Co
Englewood, Co Centennial, Co | Highlands Ranch, Co | Denver, Co
Westminster, Co Northglenn, Co | Thornton, Co | Broomfield, Co
 | Aurora, Co | Golden, Co

Call Us Today!