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Casement windows swing or crank open using hinges attached to the outside of the window frame. They are installed to open to the right or left as a single-window or multi-window panel. This panel can be a pair of single casement windows opening from the center (French casement) or feature a solid center glass area with casement-style openings on either side. In this configuration, the side casements would open from the center window outward. Stays are set when the window is open to keep it in place, and casement windows can open inside or outside.

Casement windows can also be installed horizontally, using hinges attached along the top of the frame. This configuration is known as an awning window. Horizontal casement windows are opened using a crank, lever, or cam handle and can be locked in place or closed with the same device.

What are the advantages of casement windows?

Outward-opening casement windows are an excellent way to bring outside air into a room. The opened glass panel captures breezes and directs them into the room. (This works best when the window is open at 45º or less.)

casement windows
Milgard Casement Window

Casement windows are also energy efficient because they can form a tighter seal against the frame than other windows, helping to prevent air seepage better.

What is the difference between French casement windows & casement windows?

french casement windows
Simonton Casement Window for Kitchen

A French casement window consists of a single frame with two side-by-side sashes. These windows are hinged at all four corners, allowing the two windows to open independently – like French doors (hence the name.) These windows can be manufactured to open inward or outward. Inward opening windows typically have latches and are opened by hand. Outward opening french casement windows can be opened by the push of a hand or a crank. They can be fabricated with or without grids.

Benefits of French casement windows

french casement windows
Simonton Casement Window for Living Room

French casement windows add a classic look to a home and bring a dramatic flair when opening by hand. Ask your Save Energy Company window specialist if French casement windows are a good choice for you and your home.

Different materials used in the manufacture of a casement window


Vinyl Casement Window 

Vinyl windows are made from PVC, as are many other construction materials such as plumbing pipes. It is strong, durable, and does not conduct heat. It has a high insulation value making it a very energy-efficient product. Vinyl windows are the most cost-effective replacement windows, making them very popular. They can be made in various colors, and they are virtually maintenance-free for decades. 

Aluminum Casement Window

Aluminum is a durable metal that doesn’t rust, warp or rot. It is the frame recommended for use in designated coastal zones in California. Aluminum windows come in all sizes and styles. The frames can be anodized (natural) or with a baked-on, custom-color finish. These windows are virtually maintenance-free and will last decades. Aluminum does conduct heat, so these windows do not receive energy-efficiency ratings as high as vinyl, wood, or fiberglass options. 

Wood Casement Windows

Wood casement windows are the classic standby. They can be stained for that natural wood look or painted. They require maintenance over the years to keep them in top operational shape and maintain that classic look. 

Fiberglass Casement Windows

Fiberglass is stronger than vinyl and can be clad with wood making it a hybrid choice in window frame construction. These windows can match any shape, style, and size. They are typically higher priced than vinyl but less expensive than wood. Fiberglass windows are durable and maintenance-free but are susceptible to chalking when exposed to UV rays for long periods. It is essential to ensure the manufacturer puts a thick, durable paint coat on all fiberglass window products.

How are casement windows installed?

Casement windows come in two frame configurations – new construction and retrofit. New construction windows are installed directly onto the studs that frame the window opening. When replacing existing windows, the old ones have to be removed down to the studs of the window opening. Removal requires the exterior wall covering to be cut away to access the old frame pieces. With a “clean opening,” the replacement window is installed using proper flashing and sealant materials. The newly constructed window can be trimmed with wood to cover the space created (when the siding is removed), or the masonry/stucco needs to be patched and painted.

casement window installation
Simonton Casement Window

Retrofit windows fit over the basic skeleton frame of the previous window. This installation technique is best when replacing old, single-pane aluminum windows. Once all the glass and sashes have been removed, the new retrofit window assembly is placed over the old “skeleton frame,” completely covering it, forming a new, tight, air and water-proof seal with the window frame. The advantage of retrofit windows is there is no disturbance of the surrounding exterior or interior walls. The trade-off is that retrofit windows will slightly reduce the total glass area of the window because the frame has to be larger than the original frame to fit over, hide it and seal properly. But don’t worry – you’ll be so happy with the look and smooth operation of the new windows, you won’t even care that they are ever so slightly smaller….

What is the installation cost for casement windows?

casement window installation
Marvin Casement Window

All windows purchased from Save Energy Co are custom measured and manufactured to the exact specifications of each of your window openings. There is no “standard” off-the-shelf window; therefore, there is no “standard” price. Our window specialists will meet with you at your home to discuss your exact window needs, then quote a fee for the materials and labor required to meet those needs.

Get Started with a Free In-Home Estimate

Doors Windows Replacement & InstallationSave Energy Co. has been providing window replacement and installation services for customers in the Bay Area for more than 40 years. Our mission is to help our customers in San Francisco, Marin, San Rafael, Petaluma, Sonoma, Santa Rosa, and other local areas make their homes look more beautiful, and save money on their energy bills with replacement windows and doors.

To schedule a free in-home estimate and find out more about the cost to add casement windows in your home, give us a call at (415) 492-1814 or fill out our online contact form. Or, if you prefer, make an appointment to visit our Petaluma doors and windows showroom to speak with us in person!

Call 415-492-1814 or contact us online for a FREE estimate.