Best Windows and Siding for Colorado Climate


Choosing Windows and Siding


Colorado weather temperatures frequently fluctuate. That's why we trust Infinity from Marvin and James Hardie for windows and siding.

Homeowners ask us all the time and ask how they can update their windows and siding. Typically, their windows and siding are drafty and disintegrating, and the house looks terrible.  We believe Infinity from Marvin and James Hardie Siding is the best windows and siding choice for Colorado for these ends. Colorado's weather and UV equate to one of the country's most dramatic weather climates, pointing to the rapid decay of ordinary windows and siding. Fiberglass is not your average window material. Fiber cement is not your average siding.  

We offer you the best windows and siding for your money and provide the best customer service and expert installation. We urge you to call several companies, have them out to your home, and then talk to us. 

Don't trust your home to just any windows and siding dealer; trust the company that has established its reputation as the best windows and siding business since 1973!

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What to look for in replacement windows?

You want a window that is sturdy and energy efficient.  Infinity windows are made with Ultrex®, a pultruded fiberglass with a patented acrylic capping that outperforms and outlasts vinyl, roll-form aluminum, and other fiberglass composites.  Marvin's Ultrex fiberglass and proprietary pultrusion process allow Infinity to manufacture high strength windows and doors that endure the elements without showing age or wear.


Proven Strength

The facts prove it. Ultrex® fiberglass is eight times stronger than vinyl and three times stronger than vinyl/wood composites. It resists fading, chalking, peeling and cracking, giving you unparalleled strength and durability. We’re constantly testing Ultrex® to prove it’s the toughest window material available.

Infinity Fiberglass Windows

We know fiberglass windows are the best replacement solution for Colorado. But not just any fiberglass. Our Infinity from Marvin fiberglass window is made out of pultruded fiberglass. Infinity from Marvin's fiberglass is the most durable fiberglass in the industry.


Ultrex pultruded fiberglass, a material patented nearly 20 years ago when Marvin pioneered the fiberglass windows and door category. Infinity windows have led the category ever since with a commitment to a product that is tough, smart, long lasting, and worry-free.


We don’t just pretend that pultruded fiberglass is the best window and door material available; we know it. Through numerous punishing tests in severe conditions, Infinity from Marvin windows made with fiberglass come out on top again and again.

Built Clean

Ultrex is made from silica sand – a safe and abundant natural resource. The Ultrex® manufacturing facilities fully comply with the 1990 Clean Air Act and are designated as a Maximum Achievable Control Technology (MACT) facility as outlined by the EPA.  Read more here

Read more about Infinity from Marvin's Sustainability here.


Window Installation

Installation of your windows is a key component of your replacement window or door project. At Gravina's Window Center of Littleton, we know that poorly installed windows will cause even the highest quality windows to underperform. You will find our technicians to be knowledgeable, courteous, skilled, true craftsmen, easy to work with and willing to work hard to see that your project exceeds your expectations. Also, we have Installation Masters Certification, so we are experts when it comes to different home applications.




What is so good about James Hardie Siding?

It’s a product that lasts, comes in a wide variety of textures and colors, and it’s affordable. The benefits extend beyond those factors, and when it comes to Hardie board siding, there is a long list of pros


  • Longevity: James Hardie siding comes with a 30-year, limited transferable warranty. This siding is entirely rotting and insect resistant and can even handle the salt spray from the ocean.


  • Appearance: Hardie board siding is manufactured to simulate any other siding materials, including lap boards, cedar shingles, and shake siding. Color options are practically endless. A 15-year warranty supplements these colors on the finish.


  • Fire Resistance: James Hardie's siding is 90 percent sand and cement, which makes it fire-resistant. Case in point, a St. Paul Minnesota residential fire torched two parked fire trucks, but the James Hardie siding on a home next door, 50 feet away, survived unharmed.


  • Storm Resistance: Whether you're looking for residential siding that can withstand woodpeckers and termites or siding that can defend against the next hailstorm, fiber cement board siding is a proven commodity in severe weather conditions.


How much value does new windows and siding add to a home?

It's a precarious balance, but some home improvement upgrades are worth the cost, even if you're not planning on selling any time soon.  The bottom line: Replacing windows and siding add tremendous value to your home while also improving your home's overall look and energy efficiency.