Infinity By Marvin Ultrex Fiberglass Windows
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double hung windows

Ultrex Strength

Infinity logo

Infinity® replacement windows and doors are made from Ultrex fiberglass – a kind of reinforced fiberglass material that’s so strong and durable it performs better than other window materials. Best of all, it means that Infinity products are virtually maintenance-free.

Created for strength and beauty

pultrison process graph

Our patented process begins with strong glass cables saturated with specially compounded resins which are then pulled through a heated die before being cut with diamond-edge blades. You can see below the steps that Ultrex goes through, from forming and curing all the way up to cutting. These steps help ensure the creation of a remarkably durable material able to outlast and outperform other materials used for windows.

Advantages of Ultrex fiberglass

Low maintenance
Silica sand – an abundant natural resource – is used as a base material
Intricate profiles that replicate the look of traditional wooden windows
Low expansion which means easy operation and longer window life
Strength helps windows keep their shape
A narrow profile that allows for more visible glass area and a bigger view
Long-term stability, reducing the risk of seal failures and air leakage
Patented, mechanically bonded inline acrylic finish that’s up to 3x thicker than competitive finishes, therefore providing superior resistance to discoloration, scratches, and dents
8x stronger than vinyl – one square inch can support 41,000 pounds!*
Fiberglass windows have a 38% longer useful life expectancy compared to vinyl**
Infinity windows with Low E glazing can reduce heating and cooling bills by as much as 30%.***
* Stiffness of the material when it performs as designed. The stiffness is the material’s flexural modulus, expressed in pounds per square inch.
** “Life Cycle Assessment of Windows for the North American Residential Market: Case Study” by the University of British Columbia. Scandinavian Journal of Forest Research, 2008.
*** Estimated savings are based on data set forth in the Window Selection Tool of the Efficient Windows Collaborative, which is available at http://www.efficientwindows.org. Actual savings will vary depending on product type, location, method of installation, individual home characteristics, local climates and conditions, utility rates, and other factors.
double hung window

Durability for a lifetime

Ultrex is as strong as low carbon steel and is up to 8 times stronger than vinyl – in fact, it’s so tough we need to use diamond-edge blades just to cut it to size. The strength of Ultrex means superior stability, long-term ease of operation, low maintenance, and superior performance.

Strength for an expanded view

boy standing on vinyl, window saggsboy standing on fiberglass, it is straight

Our patented process begins with strong glass cables saturated with specially compounded resins which are then pulled through a heated die before being cut with diamond-edge blades. You can see below the steps that Ultrex goes through, from forming and curing all the way up to cutting. These steps help ensure the creation of a remarkably durable material able to outlast and outperform other materials used for windows.

Ultrex Performance

expansion chart

Cold, heat, and time – no worries

Anlin windows are designed with state-of-the-art features and technology to reduce energy consumption and, in turn, your heating and cooling costs. With thermal performance exceeding industry standards, you can enjoy a comfortable home year-round and significant savings over time.

Low thermal expansion means a stronger seal

Constructed with superior materials, these windows are designed to resist common issues, such as leaking, warping, flaking, and seal failure. Moreover, they are robust enough to withstand even the harshest weather conditions, ensuring your home is always protected.
new windows

Tired of windows that are difficult to operate?

The low expansion of Ultrex means Infinity Windows resist sticking, swelling, and warping, providing easy operation for the life of the window.

Tired of high-maintenance windows?

The low expansion means Infinity’s patented finish looks like new for a very long time. It’s practically maintenance-free because it resists discoloration, warping, rotting, corrosion, denting, and rust. It also doesn’t require sanding, scraping, or painting.

A superior finish that outlasts the competition?

Our patented, mechanically bonded finish is up to 3x thicker than that of the competition, providing superior resistance to scratching and UV degradation even on darker colors. The Ultrex coating system is AAMA 624-10 verified. That is, our commercial-grade finish resists even the harshest weather conditions that Mother Nature has at her disposal – a claim many competitors can’t match.

Infinity Stones

Infinity offers Stone White as our standard exterior color, although Sierra, Cashmere, Pebble Gray, Bahama Brown, Bronze, and Ebony are also available.
stone white color
Stone White
sierra color
Sierra
sierra color
Cashmere
pebble gray color
Pebble Gray
bahama brown color
Bahama Brown
bronze color
Bronze
ebony color
Ebony

Infinity Interior Color Options

Infinity offers Stone White as our standard interior color. Homeowners can also choose from Sierra and EverWood®, our stainable wood grain interior finish.
stone white color
Stone White
sierra color
Sierra
everwood color
EverWood

The difference is in the details

vinyl competitor
Vinyl Competitor
infinity window
Infinity
Infinity offers Stone White as our standard exterior color, although Sierra, Cashmere, Pebble Gray, Bahama Brown, Bronze, and Ebony are also available.
fiberglass competitor
Fiberglass Competitor
infinity
Infinity
Infinity uses a patented, mechanically-bonded finish, which works better compared to competitors’ thin painted finish that could eventually expose the rough fiberglass material.
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Five-Star Reviews

Read Our Testimonials

"Loved working with Custom Exteriors. Very responsive to inquiries. Precise in their measurements, estimate and timeframe for completion. Highly recommend them."

Brian I.

Tampa, FL

"Custom Exteriors provided a great product and good service in replacing 2 sliding glass doors and 2 other windows in my townhouse.  One was a custom window that required extra work in refitting the plantation shutters to the new window.  Although there were some bumps along the way, Jeff and his foreman Ryan excelled at follow up.  I would recommend Custom Exteriors."

Carole N.

Tampa, FL

"Custom Exteriors did a wonderful job. The installation crew were neat and thorough. My salesman Mark kept me informed about delivery and the windows are beautiful, quiet and warm house.  I’m very pleased."

Susan G.

Tampa, FL