Attractive, durable, low-maintenance and professionally installed. Infinity from Marvin replacement windows and doors have everything you desire in a replacement product!

Infinity from Marvin windows are designed with clean, traditional lines. There are a number of exterior Ultrex Fiberglass colors to choose from that won’t chalk, spot, streak or crack.

Request More Information

Infinity from Marvin is professionally installed by Windows & Doors By Brownell. We offer a complete, no-hassle installation experience. One of our installed sales representatives will come to your home to measure each window that will be replaced to ensure accurate sizing. Your windows are then ordered and professionally installed by our own installation team. Imagine going to work in the morning and coming home to new beautiful windows, with no mess left behind!

Visit our showrooms or call 800-773-4803 for more information about ordering Marvin Windows and Doors prefinished.

Learn More About What Makes Marvin The Best Window Product Out There 

Why Ultrex Fiberglass?

Ultrex is a patented pultruded fiberglass material pioneered by Marvin.Infinity® replacement windows and doors are made from Ultrex fiberglass – a pultruded fiberglass material so strong and durable it is superior to other window materials. Best of all, it makes Infinity products virtually maintenance free.

Ultrex Fiberglass are 8 times stronger than vinyl products. The Ultrex strength keeps each window or door unit square, true and weather-tight over time.

Ultrex Fiberglass is completely low maintenance. Infinity windows and doors never need to be scraped, sanded or painted. Once your units are installed, there is virtually nothing left for you to do except enjoy the view!

Learn more about the strength and duribility of Ultrex at

View Infinity Window Styles

Explore Windows

View Infinity Door Styles

Explore Doors

Limited Lifetime Warranty

Even though Infinity products are built to last, they are still covered by a limited lifetime warranty. Because sometimes, life happens.

Warranty Information

Owner’s Manual

Download Infinity by Marvin’s Owner Manual for valuable information regarding the operation and care of your Infinity windows.

Download Owner’s Manual

Lead Time & Delivery

Each Infinity unit is custom made. Please contact Windows & Doors By Brownell for lead times at 800-773-4803.

About Shipping & Delivery

Infinity’s Inspiration Gallery

Use the arrows on the left and right side of the gallery to browse our Infinity images for inspiration and ideas on your next new construction, remodel or replacement project.