Living room with Infinity fiberglass replacement windows

Infinity from Marvin fiberglass
window and door replacement process

Infinity from Marvin is founded on a single promise: delivering a fiberglass window replacement experience that always exceeds your expectations. With Infinity, you choose how you work with our local partners. Learn how we offer free in-home consultations and what to expect during your appointment.

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“We make every step of replacing your windows as simple as possible. And we back it up with innovative materials and timeless design. We’re not focused on being the biggest window replacement company — we’re focused on being the best.”

Dan Marvin
President — Infinity from Marvin

Our Process

Infinity streamlines your entire window and door replacement project — from start to finish.

Expert consultation

A local independent retail partner will provide a complete consultation to determine your specific needs — including climate considerations and other factors. They will answer all your questions and provide a detailed, custom project quote based on your specifications.

A perfect fit

A measure technician will review your order, measure your openings and verify your installation needs. Your windows will then be built to your exact needs and specifications.

Seamless installation

Installation professionals will remove and dispose of your old windows, and replace them with your custom Infinity windows.

Built for life®

From our Limited Lifetime Warranty to unparalleled customer service, we go above and beyond to ensure your windows provide a lifetime of optimal performance.

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Your home reflects your style and taste. Infinity offers a complete spectrum of styles, colors and features so you can customize your new windows and doors to get the exact look you want.

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Timeless Performance

From unmatched craftsmanship to our warranty that protects your windows for as long as you own your home, we design everything to exceed your expectations and give you peace of mind.

Infinity fiberglass replacement window by staircase

Moving our legacy forward

Marvin is proud to have provided customers across the U.S. with quality windows and doors for over 100 years. But we’re not content to rest upon our heritage. We created Infinity from Marvin to provide homeowners with a new way to shop for replacement windows — centered on providing ease, confidence and a quality experience every step of the way.


Infinity only partners with local experts

Details matter

Our retail partners know the unique local codes, climate and other factors specific to your home.

Tailored to you

Count on a knowledgeable professional to walk you through replacement options and features that truly fit your needs and considerations.

Seamless installation

Built to your home's specifications, your local Infinity partner handles all the installation details for a hassle-free experience.

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.

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Infinity streamlines the entire window replacement process

Find even more answers, inspiration and ideas with our Replacement 101 guide.

Replacement 101