Here’s our guide to the types of casement windows including what it is, different kinds, parts, prices, materials, and casement window designs.
Choosing windows for your new or existing home can feel daunting and high stakes. Not only is there significant expense involved in replacing even a single window, but windows are a long-lasting product.
With proper care and maintenance, high-quality windows can last up to 25 years. That’s a long time to live with windows you dislike!
Relieve the anxiety of making such a big decision by thoroughly understanding what you’re paying for, as well as how much you should expect to pay.
By the end of this article, you’ll know all the parts of a casement window, what materials can be used to construct them, and the pros and cons of different casement window types.
Not only that, you’ll be able to explain the difference between casement and double-hung windows and understand why casement windows are preferable.
What Is A Casement Window?
Casement windows are attached to their window frame by hinges. Rather than sliding up and down, as in the case of single or double-hung windows, casement windows swing out when open.
There are multiple variations on the casement window, including single-frame, French, push-out, and egress casement windows. Casement windows may be constructed from materials such as wood, metal, composite, fiberglass, and vinyl, or from a combination of materials.
Casement types of windows have many benefits. When open, they reveal a wide space through which fresh air can pass, increasing ventilation. They are easy to open and close, even by people with limited physical strength.
The tight fit of the casement against the frame prevents both leakage and air entry, making casement windows very energy efficient.
Casement windows can be used in any kind of construction, whether residential, commercial, or industrial. They are compatible with a wide range of styles and decor, spanning traditional, modern, and contemporary designs.
To figure out what’s right for your home review the pros and cons of different types of casement windows
Single Frame Casement Windows
A single frame casement window is the most common and basic casement window available. Single frame casement windows have only one panel of glass. They are hinged on one side and open outwards.
Single frame casement windows are most often crank-operated, but push-out models are also available.
Pros and Cons of Single Frame Casement Windows: Like all casement windows, single frame casement windows are energy efficient, easy to use, and let in lots of air.
• Single frame casement windows can be easily incorporated into any decor style.
• A significant benefit of choosing single-frame casement windows is that they fit in the openings of standard window sizes. This makes it easy to replace the windows when needed, without doing any additional demolition or construction.
• Single frame casement windows are a very practical, solid choice. Perhaps the most significant fact in favor of choosing single frame casement windows is their low cost. A no-frills single-frame casement window is the least expensive type of casement window.
• Small style upgrades can increase the design impact of the single-frame casement window. Consider opting for a flush-fit frame or choosing a powder-coated aluminum casement window for a pop of color.
French Casement Windows (Double Casement Windows)
French casement windows are a type of double casement windows, consisting of two casements (the area that contains the glass) in a single window frame.
With French casement windows, the hinges are located on opposite sides of the frame. This allows the windows to be opened from the middle. Each window swings outward, moving away from each other as they are opened.
Traditional French casement windows do not have a vertical post in the center. If a vertical post exists, this is sometimes called a double casement window instead.
Pros and Cons of French Casement Windows: French casement windows are a great choice for many reasons, but first among them is their dramatic appearance.
• French or double casement windows take up twice the wall space than a single casement window. This means they let in twice as much light flood into your space, brightening the room and improving the atmosphere.
Because of this extra-wide opening, French casement windows also allow plenty of fresh air, diminishing the barriers between you and the great outdoors.
• A possible con of French casement windows is that they require a double-wide window opening, However, if you don’t have an existing double-wide window opening, it is possible to have one installed.
As long as no wiring or plumbing need to be rerouted, this is a fairly inexpensive and limited home improvement project that can completely change the look and feel of a room.
• Some consumers have security concerns when considering French casement windows without a vertical post. However, French casement windows generally have reinforced locking mechanisms that make them just as safe as any other casement window.
Push-Out Casement Windows
Push-out casement windows are first unlocked, then pushed to open. They are usually attached with friction hinges, allowing the user to partially or fully open the window.
Either a French or single frame casement window can have push-out capabilities. Push-out windows do not have a crank.
Pros and Cons of Push-Out Casement Windows: Push-out windows are visually streamlined and attractive, with no distracting crank mechanism. Their operation is simple and intuitive and does not require dexterity or strength.
• Pushout windows are ideal for placement in difficult-to-reach areas where turning a crank would be awkward or impractical. A smaller pushout casement is often combined with a larger fixed panel of glass in a single window frame where it is not possible to install a single frame casement window.
• Push-out casement windows are closed by pulling in the handle. They usually open to 90 degrees. One potential drawback of push-out casement windows is that you’ll need to be mindful not to push the window out of your reach, but most people adjust quickly and automatically.
Egress Casement Window
An egress casement window is an emergency exit option that requires less space than a door or double-hung window.
To qualify as an egress casement window, the product you choose must meet various standards and specifications. Since the purpose of the window is to allow escape in the event of a fire or other danger, it must present a clear area of a minimum height and width.
An egress window must also be installed at an accessible distance from the floor.
The specifications for egress casement windows are dictated by the international residential code (IRC) as well as local regulations.
Parts of a Casement Window
Casement windows are constructed from an assortment of moving and stationary parts, many of which have special names.
To understand the pros and cons of casement windows, learn the names of these parts, what they do, and how they interact with each other.
Window Frame: When a building is first constructed, openings are left in the wall, and the windows are installed later. To mount the window, a frame is constructed inside the opening.
Window frames are usually wood. The top of the frame is called the head, while the bottom of the frame is known as the sill. The two sides of the frame are referred to as jambs.
There are two types of window frames; lipped, and flush-fit. Flush-fit window frames form a continuous surface, moving seamlessly between glass and flame. Lipped window frames protrude slightly, sitting on top of the glass.
At one time, lipped windows were superior at keeping out the weather, but technological advancements mean that there is now no difference in efficiency or weatherproofing between the two.
A single window frame could contain multiple casements. When two casements are installed side by side, the vertical bar between them is called a mullion. When one casement is installed above another, the horizontal bar between them is called a transom.
Casing: The window casing covers the joint between the wall and the window frame. Casings can be decorative or functional and are usually made from wood or composite material.
Hinges: Hinges are pivot points that attach the casement to the window frame. They allow the casement to rotate around the pivot point, opening the window.
The hinges used in casement windows are usually called friction, torque, or detent hinges. This kind of hinge not only allows the window to open and close but also holds the window in the desired/open position. If a friction hinge is not used, the casement window may require a stay to remain open.
When a controlled closing motion is desirable, as in the case of large or heavy windows, a damper can be added to the hinge. Damper-style hinges provide additional resistance to prevent the window from slamming shut.
Sash: A casement window consists of glass-enclosed in sashes. Sashes are the part of the window that surrounds the panel of glass. The horizontal borders of the sash are called top and bottom rails, while the vertical borders are known as stiles.
Crank: Crank-operated casement windows have a sliding shaft on the hinged edge of the window. The shaft is connected to an arm, which is used as a handle.
Turning the handle in a circular motion converts Turning the arm in a circular direction moves the shaft in a reciprocating (back and forth motion, allowing the window to be opened and closed.
Stays: Stays are the bars that hold casement windows open. They attach to the rail or stile of the casement sash, and the window frame.
When in use, a window stay prevents the window from closing. They also keep windows from opening past the length of the stay. Window stays can be used in high-rise buildings to reduce the risk of accidents.
They may also be found on older casement windows that were installed without the benefit of friction hinges to hold the window in place.
Window Lock: There are two types of window locks: security locks and opening restrainers. Both types of locks are installed in two pieces, one on the window frame and the other on the casement itself.
Security locks latch to keep the window closed. A keyed lock may be installed on casement windows for security or insurance purposes.
Windows with multiple casements in a single frame each require a separate lock. On larger casement windows, it may be necessary to install two locks.
Opening restrainers dictate how far the window can open. A bar or chain may connect the two parts of the lock. Window locks of the restraining type are frequently used to ensure child window safety standards are met.
Window Screens: Window screens are an accessory that can be added to casement windows. Metal mesh stretches across a frame, which is then inserted into the window frame.
When the casement window swings open, the mesh screen prevents insects from entering the interior of the building.
Weather Stripping: When there are gaps between your window frame and casement window it can interfere with your climate control efforts.
Weatherstripping is designed to prevent this. Strips of foam or fabric are placed around the edges of the window frame, sealing any leaks or gaps when the window is tightly closed.
Casement Window Materials
Another important factor when considering the pros and cons of casement windows is the material the window is made from.
Casement windows made from different materials can vary widely in terms of their look and performance. The window material determines its longevity, strength, and maintenance requirements.
Wood: Wood is a traditional material for casement window construction. Casement windows made from wood are also called timber casement windows.
Timber casement windows are the most energy-efficient, insulating choice, and are extremely strong and durable. However, wood has its drawbacks as well.
Windows bridge the gap between the interior and exterior of your home. One side is exposed to a climate-controlled space, while the other side faces the elements. Since wood is susceptible to moisture, this poses a problem.
One popular solution is to add a protective layer of material to the exterior of a timber window. This protective layer is known as cladding and is usually aluminum or composite.
Vinyl: Unplasticized polyvinyl chloride, or uPVC, is a rigid, insulating, petroleum-based material often used to construct casement windows and frames.
It is resistant to mold and mildew, and cannot rust or rot. uPVC casement windows are also flame retardant and can help block the entry of noise and air pollution into your home.
Without UV protection, the color of vinyl will fade with exposure to direct sunlight. Because vinyl expands and contracts when the temperature changes, it is susceptible to warping and cracking. See the vinyl windows pros and cons here.
Composite: To make composite casement windows, thermoplastic polymers are combined with reused wood particles.
This relatively recent advance in casement window construction has produced an inexpensive alternative to pure timber casement windows without sacrificing energy efficiency or strength.
Fiberglass: Fiberglass windows are known for their ability to withstand extreme temperature changes without warping or cracking.
Made from thin, woven, glass fibers, this material is stronger than wood or vinyl and extremely resistant to damage.
Metal: Casement windows can be constructed out of steel, although this is no longer common due to issues with condensation forming on the inside of the window during cold weather.
The most common metal used today in the construction of casement windows is aluminum. Aluminum is durable, lightweight, and low-maintenance, and provides better thermal protection than steel.
Due to the strength of aluminum, the parts can be very thin, allowing a sleek and streamlined look. Aluminum also resists corrosion, so aluminum casement windows will not flake or rust.
Aluminum casement windows are usually powder-coated, allowing you to source aluminum casement windows in a color of your choice.
Casement Windows Prices
The prices of casement windows are dependent on their shape, size, material, and features. Larger windows are more expensive, and energy-efficient glass can also increase the price.
If you are purchasing vinyl casement windows, expect to spend between $200 and $800 per window.
Wood casement windows are sometimes found for as low as $200 when constructed of cheaper wood like pine. The use of specialty wood like teak can push the price up to $2,000.
An aluminum casement window is likely to cost between $300 and $1,000.
The least expensive fiberglass windows available are around $500, and a $1,500 price tag isn’t unheard of. Steel windows fall into the same price range.
Because most casement windows require professional installation as well as the removal of the existing windows, window replacement can be a very expensive proposition.
When you add labor, installation, and removal to the equation, you can expect to pay an average of $875 per casement window. However, the energy savings of installing new casement windows can offset the purchase price. New casement windows may even raise the value of your home.
The average home has 22 windows. If you have just one or two that are cloudy and leaking, you may be considering a partial replacement. Minimum labor charges mean that it is often in your best interest, financially, to replace at least five windows at one time.
Replacing all the casement windows in your home is likely to set you back around $20,000.
If you are replacing French casement windows, the costs change. Expect to pay between $400 and $600 to purchase each French casement window. If you want a picture window flanked by casements, the price rises to between $600 and $800.
Replacing an egress casement window can cost between $1,000 and $5,000. Installing a new egress casement window that requires exterior excavation is unlikely to cost less than $8,000.
Do All Casement Windows Crank?
No, not all casement windows are opened and closed by turning a crank. Push-out casement windows are an alternative to crank-operated casement windows.
A pushout casement window has a locking handle placed along the sill or mullion. When the handle is turned, the window unlocks and the casement containing the glass can be pushed out.
Push-out casement windows are a great alternative to crank-operated casement windows in hard-to-reach areas.
Foldaway cranks are becoming more popular, allowing the crank mechanism to be hidden when not in use.
Casement Windows vs Double Hung
Double-hung windows are a non-hinged alternative to casement windows.
A double-hung window consists of two panels of glass, one hung slightly behind the other. Both panels can slide up and down within the confines of the window frame.
By changing the positions of the glass panels, double-hung windows can be opened to provide ventilation at the top, bottom, or both. This distinguishes them from single-hung windows, which have a fixed upper panel and a sliding lower panel.
Double-hung windows don’t open outwards, so they may be preferable to casement windows where there is very limited space, or where windows open onto a deck or walkway.
In every other respect, casement windows are preferable to double-hung windows.
While the upfront purchase cost of double-hung windows can be less than casement windows, they also have limited functionality.
When a casement window is opened, the entire window opening is free and clear of glass.
No matter how you position double-hung windows, half of the opening is always covered by a glass panel. This drastically reduces the amount of ventilation these windows can provide. Casement windows are known for increasing airflow in your home by redirecting breezes, similar to the sail of a boat.
Double-hung windows can get stuck and become difficult to open, requiring physical strength and risking injury.
On a double-hung window, the screen is installed on the exterior of the window. Casement windows have interior screens, so as not to interfere with the opening of the window.
Casement windows are more energy-efficient than double-hung windows. This is thanks to a tighter seal when the window is closed, allowing less transfer of air between the interior and exterior of the building.
When it comes to egress windows, double-hung windows must be very large to meet the strict clearance requirements, as half the area of the window is covered in glass at all times. Casement windows are therefore often preferable for egress.
See more related content in our article about the different types of living room windows on this page.