If you’re replacing windows in Colorado, there’s one material that outperforms the rest: fiberglass. At Gravina’s Window Center of Littleton®, we’ve specialized in fiberglass window replacement since 1973. We’re proud to offer Infinity from Marvin® fiberglass windows—designed to handle Colorado’s extreme weather where vinyl fails.

• Colorado-Tested Durability: Vinyl can warp, bow, and fail under Colorado’s harsh UV exposure and rapid temperature swings. Infinity’s Ultrex® fiberglass is 8x stronger and far more dimensionally stable than vinyl—meaning no warping, cracking, or seal failures.
• Energy Efficiency that Pays Off: Most homes lose 40% of heating and 50% of cooling energy through outdated windows. Infinity from Marvin fiberglass windows are engineered for performance—with multiple panes, Low-E coatings, and weather-tight seals—to cut energy costs by up to 50%.
• Low Maintenance, High Style: Unlike vinyl, which fades and becomes brittle, fiberglass holds its finish and resists aging. Infinity windows can even be painted for ultimate design flexibility. No chipping, peeling, or scraping is required, just timeless curb appeal.
• Environmentally Responsible Choice: Fiberglass is more sustainable than vinyl, and it’s recyclable. With better energy performance and a longer lifespan, fiberglass is the eco-smart solution for modern homeowners.

When it comes to window performance in Colorado’s unpredictable climate, not all materials are created equal. That’s why we recommend Ultrex® fiberglass, exclusively used in Infinity from Marvin® windows – over standard vinyl. Ultrex is up to 8x stronger, resists warping and cracking, and outlasts vinyl in every measurable way.

Vinyl windows may cost less upfront, but they can’t compete with the long-term value, strength, or beauty of fiberglass. If you’re ready to invest in windows that last decades, Gravina’s Window Center of Littleton® is here to help. We’re Colorado’s trusted authority in fiberglass window replacement and the oldest Infinity from Marvin dealer in the state.

Get your free, no-pressure quote today by calling 303-794-0490 or fill ou at https://www.windowsforyourhome.com/contact-us/