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Replacement Windows for Your Home

Ultrex® Fiberglass replacement windows direct from Marvin. No hassle sales approach, personalized experience.

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Which Type of Window is Right for You?

Double Hung windows line drawing

Double Hung

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Single Hung Windows windows line drawing

Single Hung

Round top windows line drawing

Round Top

Slider windows line drawing


Awning windows line drawing


Bay windows line drawing


Specially shaped windows line drawing

Special Shapes

Bow windows line drawing


Single Hung Round Top diagram

Single Hung Round Top

Double Hung Windows

View of white Marvin Replacement Double Hung windows from a porch.
View of white Marvin Replacement Double Hung windows from a porch.
Living room view of Marvin Replacement Double Hung windows with curtains opened to either side.
Exterior view of Marvin Replacement Double Hung windows on a white house with a red front door.
Interior dining room image featuring Infinity Double Hung Windows in Stone White interior finish with White hardware.

Double hung windows open by sliding up from the bottom and sliding down from the top. Our double hung Ultrex® fiberglass windows have classic style and you can easily clean them from inside your home. Double hung windows work great in areas where you have shrubbery or other landscaping that prevents you from having a window that opens outward.

Why choose double hung windows?

Double hung windows are easy to clean and fit into any kind of room. Plus, double hung windows can combine with picture windows, special shape windows, or round top windows to create spectacular views. Double hung windows pair with many home styles, especially contemporary, Colonial, farmhouse, and Cape Cod style homes.

Imagine Better Living with Better Fiberglass Replacement Windows

Marvin Replacement tailors windows to fit your home and has a multitude of options to create the perfect look for your home.

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Custom-sized for a perfect fit

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Virtually maintenance-free

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Energy efficient glass options

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Multiple screen options

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Optional divided lite patterns

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Multiple frame and hardware color options

We Use Ultrex Fiberglass
for Unmatched Performance


Superior Strength

Compared to other materials, Ultrex fiberglass is the strongest window framing material in the replacement industry. The superior strength of Ultrex results in windows and doors that protect your home, and will continue to easily open and close for years to come.

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Resists Weather

While other window materials can expand and contract, depending on the weather, Ultrex fiberglass expands at virtually the same rate as glass. It makes Marvin Replacement windows and doors resistant to leaks, seal failures, and stress cracks that can compromise energy efficiency and long-term performance.

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Virtually Maintenance-Free

Our proprietary acrylic finish is 3x thicker than the competition. Our finish resists scratching and denting, and performs so well that we offer dark colors without fear of UV degradation or fading. No sanding, scraping or painting required—our windows are virtually maintenance-free.

Learn More About Ultrex Fiberglass

An Investment That Can Save You Money on Energy Bills

The low thermal conductivity and superior performance of our windows and patio doors, combined with the selection of energy-efficient glass options can help save money on your energy bills.*

*Savings reflects installing ENERGY STAR® certified products compared to non-certified when replacing single pane windows based on the average savings among homes in modeled cities.

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Our Installation Process

We guide you through the installation process and provide information before installation day arrives, so you know what to expect. Our Marvin Replacement Certified Installers will work diligently and respectfully while installing new windows or doors in your home.


Project Manager Walk-Through

Your project manager will conduct an initial walk-through on installation day and can introduce you to your Marvin Replacement Certified Installers.


Removal of Old Windows Or Doors

Our installers will carefully remove your old windows and doors before preparing the opening for new windows and doors.



Your installers will expertly place your windows and doors—true and plumb—to ensure a tight fit. They’ll use flashing and caulk, which can take up to 72 hours to cure, to help defend your house against any air leaks or possible water infiltration.


Final Walk-Through

Once we’ve completed your window or door installation, your project manager will conduct a final walk-through to make sure everything is to your satisfaction. We’ll also explain how to properly operate your new windows or doors and answer any other questions you may have about your new windows and doors.

Customer Ratings and Reviews


"Marvin Replacement has done a marvelous job from the beginning to completion. The design consultant was very knowledgeable and helpful as he introduced the product and gave good explanation. During the waiting period, we received updates along the way, which is really nice and helpful to know the progress of the production. The installation was pretty smooth and quick. We're quite satisfied."

Victor Y.

Portland, OR

"The whole process from start to finish was easy. The reps are very professional and friendly. The quality of the windows is very high and look beautiful. The installation was done carefully and with minimal impact to my home. The experience exceeded my expectations."

Connie B.

Lynnwood, WA

Read Reviews

Looking for More Replacement Window Information?

Discover more about the benefits of Marvin Replacement windows and more for your home.

Marvin Replacement Awning window in a bedroom with hardwood floor.

When to Replace Your Windows

Determining when it’s time to replace your windows can depend on the specific issue you’re facing.

Learn the Signs It's Time to Replace Your Windows
Exterior view of a light brown Marvin Replacement window with divided lites on an brick home.

Fiberglass vs. Vinyl Windows

Discover the differences between fiberglass and vinyl windows, and why fiberglass windows have more strength.

Fiberglass vs. Vinyl Windows
Get Started

Schedule Your Free Consultation

bi-fold door in living room

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

Schedule Your Consultation