Energy efficient window and door replacement to improve your view

Your project, made simple with Infinity from Marvin. Let our team handle every detail. Get started with a free, no-pressure in-home or virtual consultation.

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Your replacement project, expertly handled

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Expert consultation

Start your project with a free in-home or virtual consultation. Your Infinity project consultant will meet with you to understand your specific project needs, then work to find the right style, colors, and features for your home.

Infinity windows installer installs a window

Professional installation

On installation day, your old windows and doors will be removed, and your new Infinity windows and doors will be expertly installed.

A woman drinking coffee on a deck with Marvin windows behind her.

Peace of mind

You'll get peace of mind with our industry-leading warranties. Your coverage will include a Limited Lifetime Warranty on your new windows and doors, and a Lifetime Installation and Service Warranty.

Energy efficient replacement windows in every style

Double-hung Window Product IconDouble Hung
Single-hung Window Product IconSingle Hung
Casement Window Product IconCasement
Slider Window Product IconSlider
Awning Window Product IconAwning
Bay Window Product IconBay
Bow Window Product IconBow
Round Top Window Product IconRound Top
Specialty Window Product IconSpecial Shapes
Double Hung Replacement Windows
Interior entry image featuring a Double Hung Window in Stone White interior finish with White hardware.
Infinity Double Hung Windows open by sliding up from the bottom and sliding down from the top. Double hung windows are a classic style, and are easy to clean from inside your home.

Patio doors to keep your home warm and inviting all year

Bi-fold Patio Door Product IconBi-Fold Replacement Patio Doors
Sliding Patio Door Product IconSliding Glass Replacement Patio Doors
Sliding French Door Product IconSliding Glass Replacement French Patio Doors
Inswing French Door Product IconInswing French Replacement Doors
Folding (Bi-Fold) Replacement Patio Doors
Interior living room image featuring a bi-parting Bi-Fold Door partially open in Stone White finish with Oil Rubbed Bronze Cambridge hardware and a Beige sill.
Infinity Bi-Fold Doors feature large panels of glass that fold open and closed like an accordion. Choose a bi-fold door to seamlessly expand your indoor/outdoor living spaces.
Top quality 10+ on everything, starting with the initial salesman through the quality assessment at completion. BRAVO.
Patricia K.
Lynn, MA
PineHurt interior living room
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(617) 830-7727

Incredibly strong Ultrex® fiberglass windows & patio doors

Interior living room image featuring Infinity Casement Windows, Infinity Picture Windows, and an Infinity Inswing French Door in Stone White interior finish with White and Oil Rubbed Bronze hardware.

Stands Up to Pressure

Ultrex offers superior bend and flex resistance to protect the integrity of your home. Our strong material = narrow frames and bigger views.

A Fit That Never Quits

Ultrex expands at virtually the same rate as glass so our windows resist leaks that can compromise energy efficiency and long-term performance.

A Finish That Lasts

Our proprietary acrylic finish is 3x thicker than the competition. No sanding, scraping or painting required—our windows are virtually maintenance-free.


Ultrex is 8x stronger than vinyl.


Ultrex expands 87% less than vinyl


48,000 hours of sun can’t fade the superior finish of Ultrex fiberglass.

Get Started

Schedule your free consultation

White brick home exterior with a Marvin Replacement Bay window.

If you’re ready to get started, discuss your replacement window and door options with an Infinity design consultant. We’re here to answer any questions you may have, and help make your project easy.

Schedule Your Consultation