Ultrex® Fiberglass: The Better Material For Windows

Ultrex® Fiberglass: The Better Material For Windows

At 3JM Exteriors, Inc., we pride ourselves in installing windows that practically pay for themselves. We carry Marvin Windows and Doors® products, and we’re proud to be one of the few who have access to their revolutionary line of windows made with Ultrex® fiberglass. It’s simply the better material for when you need sturdy replacement windows for your home. Read on to learn more.

Ultrex® Fiberglass

The Strongest Window Material

Ultrex fiberglass is eight times stronger than vinyl – the standard material for windows today. Just one square inch of this state-of-the-art material can support around 34,000 lbs – which is heavier than two giant monster trucks. It also has extremely high tensile strength; vinyl only has a tensile strength of 7.0.

Ultrex fiberglass on the other hand has a tensile strength of 40.14, meaning it can handle things that would destroy a regular window. It’s strength alone is the reason we always use this material for window replacement.


Ultrex fiberglass isn’t just strong; it’s energy-efficient, too. These windows boast dual-pane windows with Low-E coating, which helps lower energy costs around your home. It can cut heat loss up to 34% when it gets colder and cut your cooling costs by 38% when the weather turns warmer. The window’s high ENERGY STAR® ratings are testament to how beneficial it is to your home, so have us install this and watch your energy costs go down.

Superior Paint Finishes

When you have us install your new Ultrex® fiberglass windows, we’ll also provide you with the industry’s finest fiberglass finish. This material has an innate acrylic finish, and this helps with color retention. Your new windows don’t just last a very long time, they’ll retain their beautiful finishes for an even longer time, too. Unlike vinyl, we can also offer darker finishes for your Ultrex® fiberglass windows without fear of increasing heat absorption and UV degradation.

Our general contractor is ready to install the best window systems for your home. Give us a call at (630) 882-2422 for a free estimate on our services. We offer professional window replacement throughout Lake Forest, Hinsdale, and Schaumberg, IL.