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Infinity® from Marvin


Infinity from Marvin® is a line of fiberglass replacement windows and patio doors designed by the experts at Marvin Windows and Doors. Infinity windows are made from Ultrex fiberglass, a material so strong and durable it is superior to other window materials, including vinyl and aluminum. Created for the homeowner who wants low-maintenance, energy efficiency and traditional beauty, Infinity products are sold by Hammer and Nail Exteriors as a complete, installed package to provide you with a high-quality, hassle-free experience. Infinity products can be used for remodeling and replacement projects, as well as new construction and light commercial applications.

Hammer and Nail Exteriors is your Washington, DC, Maryland and Northern Virginia area Infinity from Marvin® Windows and Doors Authorized Installing Retailer. For style that’s built to last, call to schedule a free in-home consultation or visit our Rockville showroom for more information on Infinity windows today.

The Right Window Replacement Choice

 When considering window replacement, you’re demonstrating pride and commitment to the investment you made in your home. The strength of Infinity translates into superior stability, long-term ease of operation, low-maintenance, and superior performance. Consider the following as you research your window and door replacement options:


Choose a brand recognized as a leader. Infinity products represent nearly a century of innovation and uncompromising performance – when you go with Infinity, you get the legacy of Marvin Windows and Doors.

Your Home’s Appearance

Choose replacement windows and doors made in custom sizes with options and features that meet your expectations. Infinity from Marvin’s thoughtful designs, appearance, and options allow you to match the style of your home.

Built for Life®

Choose windows and doors that are durable and will stay weathertight. Infinity products are made from patented Ultrex® pultruded fiberglass. Ultrex is as strong as low carbon steel and 8x stronger than vinyl. It’s so tough we have to use diamond-edge blades just to cut it to size. Ultrex is so much stronger and superior to other materials, including vinyl and aluminum, we back our products with a limited lifetime warranty. Infinity products can be used for remodeling and replacement projects, as well as new construction and light commercial applications. 


The Ultrex Difference 

Ultrex® Fiberglass is 8X STRONGER THAN VINYL!

Standing on Vinyl


Standing on Ultrex


  • Completely low maintenance
  • Superior durability
  • 8x stronger than vinyl
  • 1/6 the thermal expansion of vinyl
  • Resists distortion up to 350˚ F
  • 500x less conductive than aluminum
  • Won’t rot, dent, chalk, or distort



The superior strength of Ultrex fiberglass allows window frame profiles to be narrower than wood windows or vinyl windows, giving you more glass and better views from your replacement windows. Combine this with the durability of Ultrex in all climates and you have a high quality, low maintenance, energy efficient replacement window that will stand the test of time.

The Full Line of Trusted Brands We Offer:

At Hammer and Nail Exteriors, we’re dedicated to providing you with the best window products to suit any budget. Our window and door company is proud to install and replace the following window brands: