Who makes the best fiberglass replacement windows?

Denver Fiberglass windows from Gravina's Window Center

Ultrex fiberglass - a pultruded fiberglass material

Fiberglass replacement windows are durable and need no maintenance. They're resistant to temperature extremes and moisture.  In other words, they are the perfect window.


best fiberglass window denver

Infinity from Marvin Replacement Windows Denver


These are the facts:  Ultrex Fiberglass is eight times stronger than vinyl and three times stronger than composites. That’s as tough as steel. So when a house settles and time marches on, Infinity replacement windows stay true and resist sagging—proving that they’re truly the best fiberglass window on the market.


Ultrex fiberglass gives homeowners windows and doors that are...

• Low Maintenance – Ultrex performs beautifully for years to come, with a finish that requires virtually no maintenance.

• Energy Efficient – Ultrex’s minimal thermal conductivity serves as a built-in insulated barrier against the elements – reducing heating and cooling costs.

• ENERGY STAR® certified – The Energy Department estimates that by installing ENERGY STAR-rated products, the average U.S. household can reduce its annual energy bill by 15 percent.

• Environmentally Friendly – Ultrex takes less energy to create – about 80 percent less than aluminum and about 40 percent less than vinyl. Also, it’s made mostly of glass, which is made from sand and gravel – a plentiful resource.

• Beautifully Designed – Made by wood window experts at Marvin, Integrity features traditional profiles and details that are more attractive than the “flat” appearance of other materials. Ultrex ensures it will stay beautiful for years to come.

That's why we at Gravina's Window Center of Littleton sell only the best fiberglass windows...Infinity from Marvin fiberglass replacement windows.

Contact your us today to schedule an in-home consultation and don’t forget to ask about Marvin's patented Ultrex fiberglass!  Call 303-794-0490

Learn more here

1 Comment

  • Who makes the best fiberglass replacement windows?

    […] The Infinity from Marvin window is made from Ultrex Fiberglass. Ultrex Fiberglass is eight times stronger than vinyl and three times stronger than composites. That’s as tough as steel. So when a house settles and time marches on, Infinity replacement windows stay true and resist sagging—proving that they’re truly built to last. […]

  • Write a Comment

    Your email address will not be published. Required fields are marked *