Incredible strength. 
Enduring style.
That’s Infinity from Marvin.

Bring new life to your home with beautiful windows and doors made with the strength of Ultrex® fiberglass. Built to last and backed by our Limited Lifetime Warranty. Because replacing your windows and doors is something you should only have to do once.

Connect with a local Infinity expert today for a free, no-obligation consultation.

Living room with white Infinity from Marvin replacement windows and door

Infinity partners with local experts who simplify the replacement process for you every step of the way. And we back it up with advanced building materials and design details that endure the test of time. Because some decisions should only be made once.

Window replacement from start to finish

Before installation

A local Infinity from Marvin expert will provide a free in-home consultation to discuss style, features and more.

During installation

On installation day, they'll arrive at your home to remove the old windows and expertly install your new Infinity windows.

After installation

Infinity offers a Limited Lifetime Warranty for as long as you own your home. And we're always here if you have a question.

Fiberglass windows and doors that are Built for Life®

Exterior of home with Ultrex fiberglass windows

Fiberglass windows and doors that are Built for Life

Custom-built windows and doors from Infinity harness the strength of Ultrex fiberglass to bring new life to your home

  • Ultrex expands 87% less than vinyl and resists expanding and contracting in any climate
  • Is 8 times stronger than vinyl to protect the integrity of your home
  • Is resistant to leaks, seal failures and stress cracks that could impact your energy efficiency
Explore Ultrex®
Ultrex fiberglass window daylight view

Intentional design that withstands the test of time

  • The strength of Ultrex allows us to design for narrow profiles, so you can enjoy bigger views and more daylight in your home
  • The proprietary acrylic finish of Ultrex is fade-resistant and virtually maintenance-free
  • Explore our complete collection of styles, features, and options to complement any style
Windows Features + Options Doors Features + Options
Infinity from Marvin window replacement experience

Our commitment to customer service and satisfaction

  • Limited Lifetime Warranty for as long as you own your home
  • Backed by decades of dedication to quality
  • Committed to our core value: Do the right thing.  
Learn More

Download the Infinity Replacement Inspiration Guide

Get inspiration for your next window or patio door replacement project and download the Infinity replacement guide. Simply fill out the form for replacement inspiration.

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Partnering with local experts

Infinity carefully selects independent retail partners with a proven track record of serving their communities for many years.

Infinity partners place a high emphasis on quality and outstanding service.

Our partners understand your unique local codes, climate considerations, and installation needs

Discover what Infinity can do for you

Replace your windows with confidence

Schedule a consultation with your local Infinity partner to learn how Infinity can help you bring new life to your home.

Schedule Now