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Casement windows, also known as crank out windows or crank windows, open outwards with the turn of a handle. Casement windows have a hinge to either the right or left side to open horizontally. Marvin Replacement's Ultrex® fiberglass Casement Windows provide long-lasting strength and timeless style.


  • Built with high quality Ultrex fiberglass for superior strength

  • Tuckaway handle stores neatly and out of view's way

  • Enjoy the functionality of a casement window with the looks of a double hung with an optional simulated check rail

  • Multi-point locking system forms tight seal to keep unwanted air and water out

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Get your project started by booking a free appointment with one of our design consultants.




Strong Frame Material

Ultrex fiberglass is 8x stronger than vinyl windows to resist warping and shifting to protect your home.


Exceptional Stability

Ultrex expands 87% less than vinyl to resist leaks + seal failures for windows that open and close easily.


Choose Easy Cleaning or Expansive Views

Clean casement windows from inside your home with Easy Clean® hinge that leaves room between the frame and window to maneuver. Or select an expansive view with our Clear View® hinge, which eliminates the opening between the window and frame for an unobstructed view.


Low Maintenance

Our Ultrex fiberglass frames require practically no maintenance.

Exterior view of casement windows with window grilles on a white brick home.

Replacement Casement Window Design Options

Replacement Casement Styles

Marvin Replacement Ultrex fiberglass casement windows are custom-sized, available in several styles and configurations, like double and triple casement windows. You can also combine our casement windows with picture or round top windows. Assemblies can come as two units high or four units wide. Triple Casement windows can be found with our bay windows.

Selected: Standard Casement

View of a standard Marvin Replacement Casement window.
Image of a white Marvin Replacement Casement window with a half Round Top window above.
View of a Marvin Replacement two-wide Casement window configuration.
View of two white Marvin Replacement Casement windows with a white picture window in the middle.
View of two white Marvin Replacement Casement windows with a Picture window in the middle.
View of a standard Marvin Replacement Casement window.

Exterior Colors

Our finish stands up to the elements, so much so that 48,000 hours of sun can't fade our finish* and our fade-resistant acrylic finish resists scratches, chalking, chipping, denting, and peeling. Choose from seven stunning exterior colors to boost your curb appeal.

Selected: Stone White

Stone white swatch
Sierra swatch
Cashmere swatch
Pebble Gray swatch
Bronze swatch
Bahama brown swatch
Ebony swatch
Exterior side of a Stone White Marvin Replacement Casement window.

Marvin's Ultrex® fiberglass finish is verified to the American Architectural Manufacturers Association (AAMA) 624 specification. Achieving AAMA 624 verification means that our Ultrex finish has passed rigorous tests that simulate the harsh conditions a finish can encounter throughout the life of a window or door.

*Average sunlight exposure per 10 years

Interior Colors

We use the same tough acrylic finish on our four interior color options that we use on our exterior colors. You can also choose our stainable EverWood® finish for the look of wood without the maintenance.

Selected: Stone White

Stone white swatch
Sierra swatch
EverWood finish sample
Bronze swatch
Ebony swatch
Interior side of a Stone White Marvin Replacement Casement window.

1. Bronze interior is only available with Bronze exterior

2. Ebony interior is only available with Ebony exterior

3. Sierra interior is not available with Ebony exterior

Finish samples are approximate. Schedule a design consultation for an up close view of color options.

Glass Coatings

Our experts will walk you through energy efficient glass options to find the right selection for your home and the best windows for your climate. Choose from four glass coatings, plus decorative glass options, and specialty glass choices.

Low E-1

Primarily used in colder climates, Low E1 allows more heat in to warm a room while blocking heat loss.

Low E-2

Low E2 offers year-round performance in moderate climates. It will help retain heat in your home during the winter and keep heat out during the summer.

Low E-3

Low E3 rejects solar heat while letting light in, resulting in increased performance in climates with intense sun exposure.

Low E-3/ERS

Low E3/ERS provides maximum efficiency year-round in all conditions.

Selected: Low E1

Diagram of Low E glass coating
Diagram of Low E2 glass coating
Diagram of glass with three metallic coatings.
Low E-3 ERS
Diagram of Low E glass coating

Decorative Glass

Decorative glass options are ideal for spaces like bathrooms to balance natural light and privacy.

Selected: Rain

Rain Glass
Glue Chip Glass
Narrow reed glass
Obscure Glass
Frost Glass
Marvin Replacement Reeded Decorative glass
Example of Marvin Replacement Gray Tint Decorative Glass
Sample of Marvin Replacement Green Tint Decorative Glass option.
Example of Marvin Replacement Bronze Tint Decorative Glass.
Rain Glass

Specialty Glass

We offer specialty glass to best suit the needs of your home. You can choose tempered glass, laminated glass, and STC/OITC glass for specific windows and rooms.

Tempered Glass

Tempered glass increases glass strength to help prevent breakage. Tempered glass is ideal for windows close to the floor or located in high-traffic areas.

Laminated Glass

Even more durable than tempered glass, laminated glass is often referred to as impact resistant or safety glass due to its vinyl inter layer that tends to remain in place when shattered.


Sound Transmission Class and Outdoor-Indoor Transmission Class glass has increased pane thickness on the room side and works in areas where exterior noise is a concern.

Divided Lites

We offer various divided lite patterns so you can replicate the look of your original windows and doors. Or, add new architectural interest to your home. Choose from Simulated Divided Lites for classic appeal or Grilles-Between-the-Glass for easy cleaning. Casement windows can come with a Simulated Checkrail to create the look of a double hung window with the functionality of a casement.

Patterns include: Cottage One-High, Prairie Four-Lite, Simulated Checkrail, Prairie Six-Lite, Prairie Nine-Lite and Standard Rectangular.

Selected: Cottage One-High

Image of a white Marvin Replacement Casement window with Cottage style divided lites.
White Marvin Replacement two-wide Casement window with prairie style four lite style.
Image of a white Marvin Replacement Casement window with a simulated check rail to mimic a double hung window look.
Image of two white Marvin Replacement Casement windows with a Prairie Two-Wide Six-Lite divided lite style.
A white Marvin Replacement Casement window with a prairie nine lite style.
A white Marvin Replacement Casement window with a standard rectangular divided lite pattern.
Image of a white Marvin Replacement Casement window with Cottage style divided lites.


Our tuckaway handle provides an uninterrupted view and you can choose from nine different colors for your window’s hardware. You can also select our Clear View® hinge for maximum views.

Our Clear View® hinges sits at the frame edge so you can enjoy a full view outside with your casement window open. Our Easy Wash® hinge leaves a convenient gap between the sash and the frame to allow you to clean the exterior side of the window from inside your home.

Selected: Stone White

Satin Taupe
Satin nickel
brushed chrome
antique brass
Oil rubbed bronze
matte black
Casement window handle and lock


Our casement windows come with a multi-point locking system for peace of mind and seal out wind and weather.

Selected: Casement Lock

Woman reaches for a white Marvin Replacement Casement window latch to lock the window.
Woman reaches for a white Marvin Replacement Casement window latch to lock the window.

Screen Options

We have two durable aluminum-surround screen options that provide airflow while keeping insects out. Our standard Marvin Bright View™ fiberglass mesh has a clear view, sheds water, and resists dirt. Upgrade to our Hi-Transparency mesh screen for crisper views without losing any of our standard screen benefits. Color match your screen frames to the window for a seamless look.

Selected: Bright View Screen

Sample of a Marvin Replacement Bright View screen
Sample of a Marvin Replacement Hi Transparency window screen
Sample of a Marvin Replacement Bright View screen


Our casement windows have a standard EasyWash® hinge, which allows you to clean your casement windows inside your home. Casement windows need little maintenance, but you can conduct an annual inspection to note any wear and tear. Visit our Care + Maintenance page for tips and an annual cleaning checklist.

Image of a person wiping an opened Marvin Replacement Casement window with a cloth.


Casement windows have an Easy Wash® hinge to make cleaning easy from inside your home. Unlock the casement window, remove the screen, crank the window open and clean. Replace the screen and close the window to complete the task. Consult our window maintenance guides for more tips.

  • Marvin Replacement Casement windows are side-hinged to swing out from the left or right and crank in and out. Our folding handle tucks away for a clean look.

    We know cleaning isn’t fun…but we make it easy with our standard Easy Wash® hinge that allows you to clean your window from inside your home.

    Marvin Replacement Casement windows are built with Ultrex® fiberglass to pair lasting performance with timeless design.

Frequently Asked Questions

Awning vs. casement windows

Awning and casement windows have a lot of similarities. Both are windows that open out to a home exterior, but they differ in how they swing open. Casement windows open horizontally with a hinge on the side while awning windows open vertically with a hinge at the top.

Our awning and casement windows feature a tuckaway handle to provide uninterrupted views. Both can provide ample natural light and ventilation.

You can typically find awning and casement windows in bathrooms or kitchens where you need more ventilation. Both windows require enough exterior space so they can open and close easily. Discover other differences between awning vs. casement windows.

What rooms work best for casement windows?

Casement windows often appear in kitchens because they can provide plenty of ventilation, which is important when cooking. Casement windows also can also appear in bathrooms to help with ventilation. Dens or sitting rooms can also often have casement windows to catch a breeze and natural light.

How do casement windows open?

Casement windows have a hinge on the side to open outward to the left or to the right. They open by rotating a crank usually in a clockwise motion. Marvin Replacement also has an option Clear View® hinge to maximize views.

Casement windows vs. double hung windows

Casement windows provide uninterrupted views because they don’t have a check rail like double hung windows. Marvin Replacement Casement and Double Hung windows can be cleaned from the inside of your home for easier cleaning.

Choosing casement windows vs. double hung windows can come down to their location. It can be tough to reach the top sash of a double hung window in places like above a kitchen sink while casement windows need space outside your home to swing open.

How do casement windows lock?

Our casement windows have a multi-point locking system to create a tight seal to prevent wind and weather from entering.

Do casement windows have screens?

Casement windows typically have a screen on the interior side of the window to allow free movement of the window.

What are the benefits of casement windows?

Casement windows can provide more ventilation than double hung windows and fit well in spaces where reaching to lift a single hung or double hung sash is difficult.

Casement Window Project Transformations

Added Assurance

Marvin Replacement windows and patio doors come with a limited lifetime warranty as well as a 5-year installation warranty to provide additional peace of mind.

Looking for More Replacement Window Information?

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

Marvin Replacement Awning window in a bedroom with hardwood floor

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Learn more about the best windows to improve air circulation in your home.

Windows to Improve Air Circulation
Marvin Replacement window installer places a window

Fiberglass vs. Vinyl Windows

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

Fiberglass vs. Vinyl Windows

Schedule Your Free Consultation

Interior view of a Marvin Replacement Bi-fold patio door. opened in the middle.

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

Schedule your consultation