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Replacement windows Denver

Fiberglass Replacement Windows in Denver, CO - MILGARD - PELLA

Integrity's windows and doors are made with Ultrex® Fiberglass, an innovative material created 20 years ago. For two decades now, Ultrex has outlasted and outperformed the competition on virtually every measurable scale.

Ultrex fiberglass is a superior window material, outperforming vinyl, roll-form aluminum and other window materials in every way. Ultrex is strong as steel, eight times stronger than vinyl, and three-and-a-half times stronger than wood/vinyl composites. It has a very low rate of temperature transfer, and its tendency to expand and contract is seven times less than vinyl keeps the window stable and weathertight. Ultrex is virtually maintenance free, and won’t rot, warp or dent.

Because of its superior strength, the fiberglass window frames can be made with a narrower profile to give you more daylight and better views. Thanks to Ultrex, Marvin’s fiberglass windows can be made with attractive detailing like a fine wood window – with all the practical benefits of fiberglass. Ultrex is easy to clean, and its superior finish coating stays beautiful for decades. If you want strong windows for your home in Denver, Colorado then the Integrity line of fiberglass windows is the perfect choice.

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LOWER ENERGY BILLS AS ATTRACTIVE AS THE WINDOWS AND DOORS
Compared to single pane unglazed windows, Integrity's dual pane windows made from Ultrex with Low E coating can reduce window heat loss and cut costs by up to 34% in cold climates, and cut cooling costs by up to 38% in warm climates

Fiberglass Windows

MONSTER TRUCK STRONG

Strong Fiberglass Windows

One square inch of our state-of-the-art building material can support 34,000 lbs. 

That’s more than the weight of TWO of these giant monster trucks. It has been stress-tested to the point of failure to avoid your stress being tested to anywhere near those levels. Ultrex® is 8 times stronger than vinyl.

SUPERIOR TO ALL PAINTED FINISHES

Superior Paint Surfaces

The orange light tabove is acrylic, while the rest of the car is painted. See the difference? Ultrex employs an acrylic finish to provide long-term color retention and durability.

The auto industry learned decades ago that acrylic lights outlast a painted finish. Similarly, 

WHAT TOUGH IS MADE OF:

Tough Windows

Fiberglass has an amazing strength-to-weight ratio, which is one of the reasons why it’s the material of choice for boats*, bridges, guardrails, ladders and hardhats.

It’s highly durable, doesn’t leak or corrode, resists rot and resists expanding and contracting in temperature swings. These properties make Ultrex fiberglass 8 times stronger than vinyl and a far more durable material.

INTEGRITY FIBERGLASS WINDOWS
It’s highly durable, doesn’t leak or corrode, resists rot and resists expanding and contracting in temperature swings. These properties make Ultrex fiberglass 8 times stronger than vinyl and a far more durable material.
Ultrex expands at virtually the same rate as glass which means our windows stay tight and true making them resistant to leaks, seal failures and stress cracks that can compromise energy efficiency and long-term performance.

Fiberglass has an amazing strength-to-weight ratio, which is one of the reasons why it’s the material of choice for boats*, bridges, guardrails, ladders and hardhats. enjoy the strongest windows in Denver, CO!

Contact us today for a free quote. 720.683.6288

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TESTIMONIAL
"I have already recommended them to a neighbor. We love the product, install, price, and all personnel we met from GS. I could not say enough good about the whole project. THANKS!."
Walter S.
Arvada, CO

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FAX - 303.474.4506

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