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Choosing The Best Windows

Infinity® from Marvin windows stand apart from traditional wood and vinyl options because they are crafted from Ultrex® fiberglass—a material engineered for exceptional strength, stability, and long-term performance. Unlike wood, which requires ongoing maintenance, or vinyl, which can expand, contract, and become brittle over time, Ultrex fiberglass is designed to resist warping, cracking, rotting, and thermal movement, even in extreme temperatures. The result is a window that maintains its shape, performance, and beauty for decades.

Marvin developed Ultrex to replicate the warm, refined appearance of wood while delivering far superior durability. This proprietary fiberglass material is 8x stronger than vinyl and offers a true low-maintenance solution. Because Infinity windows are made with a mechanically bonded, fade-resistant finish, the color won’t chip, dent, peel, or require repainting. The finish is built into the material—not just applied to the surface—ensuring long-lasting color stability.

Infinity from Marvin windows are manufactured in the United States and sold exclusively through a network of Preferred Dealers ensuring every installation meets the highest standards. These windows are not available for DIY installation, and for good reason: the precision of the product demands professional expertise to ensure energy efficiency, weather tightness, and long-term reliability. When closed, Infinity windows create a tight seal that helps prevent air leaks, improves indoor comfort, and enhances overall energy savings.

One of today’s most sought-after design trends, ebony windows, is available through Infinity from Marvin. Few manufacturers offer a true, fade-resistant black finish, but Infinity’s ebony exterior and interior colors retain their richness over time. Homeowners can also choose matching sliding patio doors, and for those interested in indoor–outdoor living, stunning bi-fold doors are available in ebony as well.

If you’re searching for windows and doors that deliver high performance, exceptional longevity, low maintenance, and timeless beauty, Infinity from Marvin is a standout choice. Custom Exteriors, a Preferred Infinity from Marvin dealer, offers free in-home consultations to help you explore all available styles, colors, and options.

Learn more about the benefits of ebony windows and doors! Contact Custom Exteriors today to schedule your consultation.

Convenient Financing Options

We install top-quality products at competitive prices and provide financing options to make your exterior remodel convenient, with approved credit.
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

"Kevin one of the owners of Custom Exteriors contacted me the following day and immediately tried to make things right. The first thing, I was impressed about was he took my call without hesitation. Many medium sized business will bounce me around to different people before finally being able to talk to the owner. He was an attentive listener and took to the time understand my needs and wants in an exterior entry door.His communication was top notch, sending me estimates the same day or the following day. He gave me choices in fiberglass doors: ProVia and Therma-Tru, hardware: Trilennium vs Emtek, and single point vs multiple point locks. I just ordered a ProVia doors through Kevin. This surprised both to my husband and me. Before contacting Custom Exteriors, we thought we were going to get a Therma-Tru door, but that totally changed once we the information we needed from Kevin. I get the sense that he truly wants to give customers options and information, but respects the customer's final decision. There is not high pressure sale pitch. Kevin wants customers to be informed and happy with the end product."

Hellen K.

Tampa, FL