The Ultimate Guide to Casement Egress Window Sizes for Home Safety and Comfort


When it comes to home safety and comfort, one factor that homeowners should never overlook is the size of their casement egress windows. These windows serve as crucial escape routes and provide ventilation during emergencies, such as fires or natural disasters. As such, it's essential to ensure that your casement egress windows meet the required size standards set by the International Residential Code (IRC). In this comprehensive guide, we'll delve into the various casement egress window sizes and their significance in promoting home safety and comfort.

Understanding Casement Egress Windows

Casement egress windows are hinged windows that open outwards, providing a clear and unobstructed opening for emergency exits. They are designed to be easily operated with one hand, making them an ideal choice for egress windows. Before we discuss the different sizes of casement egress windows, let's first understand the requirements set by the IRC.

IRC Requirements for Egress Windows

According to the IRC, egress windows must meet the following requirements:

1. The minimum clear opening width should be at least 20 inches.

2. The minimum clear opening height should be at least 24 inches.

3. The minimum clear opening area should be at least 5.7 square feet (5.0 square feet for ground floor windows).

4. The maximum height from the floor to the bottom of the clear opening should not exceed 44 inches.

These requirements ensure that casement egress windows provide ample space for occupants to escape during emergencies and for emergency personnel to enter the building if necessary.

Casement Egress Window Size Options

Now that we know the IRC requirements for egress windows, let's explore the various casement egress window sizes available for homeowners. Keep in mind that these sizes are just a few examples, and you can find custom-sized casement egress windows to meet your specific needs.

Standard Casement Egress Window Sizes

1. 28 inches x 48 inches (2 feet 4 inches x 4 feet):This size meets the minimum clear opening area requirement of 5.7 square feet and is suitable for most bedrooms and living spaces.

2. 32 inches x 54 inches (2 feet 8 inches x 4 feet 6 inches):With a clear opening area of 6.7 square feet, this size provides additional space for emergency exits and is ideal for larger rooms or areas with more occupants.

3. 36 inches x 60 inches (3 feet x 5 feet):This size offers a clear opening area of 7.5 square feet and is perfect for spacious rooms or those with higher occupancy rates, such as multi-family dwellings or commercial buildings.

Custom Casement Egress Window Sizes

If the standard casement egress window sizes don't meet your specific requirements, you can always opt for custom-sized windows. Custom sizes allow you to meet the IRC requirements while tailoring the window dimensions to your home's unique design and layout.

Factors to Consider When Choosing Casement Egress Window Sizes

When selecting the appropriate casement egress window size for your home, consider the following factors:

1. Room size and occupancy:Larger rooms or those with more occupants may require larger egress windows to ensure a safe and efficient escape route during emergencies.

2. Window location:The location of the window in relation to the floor and other structures may impact the size of the casement egress window you choose. Be sure to measure the space accurately and consult the IRC requirements to select the appropriate size.

3. Aesthetics:While safety is the primary concern, you should also consider the visual appeal of your casement egress windows. Choose a size that complements your home's overall design and doesn't detract from its appearance.

4. Budget:Finally, consider your budget when selecting casement egress window sizes. Custom sizes may come at a higher cost, so be sure to factor this into your decision-making process.

Tips for Installing Casement Egress Windows

Once you've selected the appropriate casement egress window size for your home, follow these tips for a successful installation:

1. Hire a professional: Installing casement egress windows requires expertise and knowledge of building codes. It's best to hire a professional to ensure proper installation and compliance with the IRC requirements.

2. Obtain necessary permits: Before installing your casement egress windows, check with your local building department to obtain any necessary permits and ensure compliance with local regulations.

3. Proper maintenance: To ensure that your casement egress windows remain functional and safe, regularly clean and maintain the window hardware and surrounding area.

By understanding the various casement egress window sizes and their significance in promoting home safety and comfort, you can make informed decisions when selecting and installing these essential features in your home. Remember to consult the IRC requirements, consider factors such as room size and occupancy, and enlist the help of a professional for a successful installation.

Casement Window


Casement windows are the most common style of window. They feature hinged panels that swing open and closed. Casement windows are available in single panels or multiple panels. The direction a door swings, either to the right or the left, is called the handing. In addition to handing, window are identified as either inswing or outswing depending on whether they open into the house or towards the outside.


Our team of experts will work with you to develop a bespoke plan that fits your needs. We take a holistic approach to the planning process, combining our technical expertise with our knowledge of customer requirements and project constraints.


Freedom to dream "truly custom-made"

Doorwin provides one-stop solution for professional windows doors manufacturer and installation. We have been serving customers with our high quality and branded products in United States, Asia and worldwide.


This newly built private house is in Sydney, Australia. The area occupied by the fenestration system in our scheduled design drawings was up to more than 110 square meters. A wide range of design details made the perfect mix of modern aesthetics and traditional sophistication, the simulated vertical hung windows with tilt & turn opening systems in this home are absolutely breathtaking. SDLS (Simulated Divided Lites with Spacer Bar) brings some historical vintage feeling to the whole building without losing any energy saving performance. Long narrow fixed windows creating larger-than-life expenses, coupled with German high-end systems made this project stand out from the rest.

Simulated Hung Window with Tilt & Turn Openings

The client's idea was to maintain a certain vintage feel, and our aim was to meet the energy efficiency needs and standards of modern houses as much as possible while maintaining a retro design. Doorwin’s 61S simulated hung windows with tilt & turn openings is a respectful modernization of a classic architectural masterwork.

Why choose the tilt and turn opening method?

Because it generally has better air seals than sliding, single hung, or double hung window frames. Tilt and turn windows form a complete seal when fully closed, this means they are less prone to water leakage, and cold draughts and you’ll keep more of your heating indoors where it belongs. They can be opened in the upper tilt way to ventilate at a minimum opening status and are easy to clean outside of the glass; when there’s a good day, they can be opened as normal inward casement windows.

Large Energy Efficient Fixed Windows

Our well-crafted bespoke systems enhance the functionality and panoramic view of this modern house.

Huge, fixed glass walls up to seven meters long and two meters high bring great lighting and open views, making it really refreshing to the mind. Five meters high long narrow windows give the whole building a contemporary aesthetic.

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Custom Designed Thermal Break Aluminum Entry Door

Aluminum Door offered an air of uniqueness and elegance to a home. With their luxurious patterns and beautiful finishes, it provides this house with a bounty of aesthetics and security. Aluminum entry doors allow you to resist any weather extremes, corrosion, and pests. So aluminum is one of the most resilient and durable materials you can select for front doors considering the price/performance ratio.

With pieces of double panes, and Low-E tempered glass. The door provides a good insulation performance.

Custom Designed Grilles and Transom

Divided lite windows and doors offer unique architectural solutions for buildings without compromising energy efficiency or aesthetics. Doorwin provides multiple muntin and glass options to customize your divided lite windows and doors. Further customization is available with a variety of colors and materials, creating an infinite number of design combinations to best suit your style.

In this project, we use SDLS (simulated divided lites with spacer bars), these bars permanently adhere to both sides of the glass, and spacer bars are installed between the glass, this is the most energy-efficient way to create the look of classical décor grilles. The windows in the bathroom bedroom and study have an Arch Transom Design, making these rooms, which are often used by the owner, have some traditional aesthetics.

BTW, Doorwin offers free design assistance, so if you need a custom design like this one, contact us right away and we will provide you with the most aesthetically and functionally pleasing design solution.

German Imported Hardware System

For windows and doors, hardware is as important as the engine is to the car. The continuous technological innovation of the European hardware industry has strongly promoted the performance improvement and functional innovation of windows and doors. In this project, Doorwin uses Hoppe™ multi-point locks, hinges, and handles from Germany.

Multi-point lock systems provide not only the burglar-resistance but also a tighter compression seam, making the window keeps good energy-efficient performance. Together with Technoform Bautec’s insulation edge bond and sealant strips, these make up our products' top insulation and energy-saving performance.

Save Your Money On Installation Costs

We have several international patents to reduce clients’ labor costs, such as our unique flanges and assembly type tubular design, which is different from the other products on the market. What sets us apart among Chinese counterpart is that all our products are equipped with nail fin structures for quick and easy installation. Labor costs during installation may exceed of the window and door price, therefore, our exclusive patent allows users to not only get a significant increase in installation efficiency, but also greatly reduce the labor cost of window and door installation. A cost that may bring you unexpected savings that far exceed the price difference you may care about now.

Free Design Assistance

With our own expertise, we provided the no-cost design development and contract documentation with CAD & BIM drawings, including elevation, details about the project, and installation help.

Before production, we will provide accurate sample drawings, which will clearly show the cross-sectional pattern, size, opening method and direction, pattern of the warm spacer, and the installation nodes. We will not go into production until you have signed off on the drawing to ensure that you receive a final product that meets the exact requirements of your project.

About Doorwin

Doorwin's professional packing system guarantees all products are delivered safely and without any damage. We apply a four-point packing system. Firstly, adhesive plastic film is applied on interior wood frames and exterior aluminum frames to avoid scratches on the surface. Then, a paper board is applied after we apply air bubble film surrounding the whole windows/ doors to avoid any destruction or clash. Lastly, we place them into a durable non-fumigation plywood crate to avoid any possible damage during transportation.

With years of experience shipping our products worldwide, we could guarantee to ship our products to their final destinations intact and without any damage.

About Doorwin Factories

Doorwin is one of the most professional window & door manufacturers are known for its great customized products. In Doorwin, a variety of colors, styles, and sizes of products are available to meet the client’s unique requirements. We own three ISO9000-certified modern factories in China. With a factory area of 20,000 m2 and a production capacity of 100,000 m2 per year. Doorwin Group has the scale to ensure timely delivery and the flexibility to reduce manufacturing lead times to as short as 18 days.