Casement Egress Window Size: A Comprehensive Guide for Homeowners

When it comes to home safety, one of the most important aspects to consider is the egress window. These windows provide a crucial escape route in case of emergencies such as fires or natural disasters. In addition, they also serve as a source of natural light and ventilation. Casement egress windows are a popular choice for homeowners due to their ease of use and versatility. In this comprehensive guide, we will discuss the various aspects of casement egress window sizes and their importance in maintaining a safe and comfortable living environment.

Understanding Egress Windows

Egress windows are designed to provide a safe and accessible exit point from a building during emergencies. They are typically installed in basements, bedrooms, and other living spaces where occupants may need to evacuate quickly. According to the International Residential Code (IRC), every sleeping room must have at least one egress window that meets specific size and accessibility requirements.

Casement Egress Window Sizes and Requirements

Casement egress windows are hinged at the side and open outward. They are an ideal choice for egress windows due to their ease of operation and ability to meet the required size and accessibility standards. The IRC mandates the following minimum requirements for egress windows:

1. Minimum width:The clear opening width of the egress window must be at least 20 inches.

2. Minimum height:The clear opening height of the egress window must be at least 24 inches.

3. Minimum net clear opening:The net clear opening of the egress window must be at least 5.7 square feet for ground-floor windows and 5.0 square feet for windows located above the ground floor.

4. Maximum sill height:The sill height of the egress window must not exceed 44 inches above the finished floor.

It is essential to note that these requirements are the minimum standards, and homeowners may choose to install larger casement egress windows for added safety and convenience.

Benefits of Casement Egress Windows

There are several advantages to choosing casement egress windows for your home, including:

1. Ease of operation:Casement egress windows are easy to open and close with a simple crank mechanism, making them an ideal choice for emergency exits.

2. Versatility:Casement egress windows can be installed in various sizes and styles, making them suitable for different architectural designs and room layouts.

3. Energy efficiency:Casement egress windows provide a tight seal when closed, helping to reduce air infiltration and improve energy efficiency.

4. Natural light and ventilation:Casement egress windows allow for ample natural light and fresh air to enter the room, creating a bright and well-ventilated living space.

Choosing the Right Casement Egress Window Size for Your Home

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

1. Room size and layout:The size of the room and the layout of the furniture will determine the ideal window size. Larger rooms may require bigger windows for adequate ventilation and natural light.

2. Local building codes:Always consult your local building codes to ensure that your chosen casement egress window size meets the minimum requirements for safety and accessibility.

3. Aesthetic considerations:Choose a casement egress window size that complements the overall design and style of your home, both inside and out.

4. Budget:Determine your budget for the project and select a casement egress window size that fits within your financial constraints.

Installing Casement Egress Windows

Proper installation of casement egress windows is crucial to ensure their effectiveness during emergencies. It is recommended to consult with a professional contractor or window installer to guarantee that your casement egress windows are installed according to the required safety standards and local building codes.

In addition to professional installation, regular maintenance is essential to keep your casement egress windows functioning optimally. This includes cleaning the windows and tracks, lubricating the crank mechanism, and inspecting the window seals for any signs of wear or damage.

Casement Egress Window Accessories

To enhance the functionality and appearance of your casement egress window, consider the following accessories:

1. Window well covers:Installing a window well cover can help to prevent debris, water, and pests from entering your window well.

2. Security bars or grilles:Adding security bars or grilles can provide an added layer of protection against break-ins while still allowing for easy egress during emergencies.

3. Window treatments:Selecting appropriate window treatments, such as blinds or curtains, can help to control the amount of light and privacy in your living space.

In conclusion, casement egress windows are an essential safety feature for any home. By understanding the various size requirements and options available, homeowners can make an informed decision when selecting and installing these crucial windows. With proper installation and maintenance, casement egress windows can provide a safe and comfortable living environment for years to come.

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.

Every window’s placement and shape not only add to the uniqueness of this home but also provide a more energy-saving ability for the owners.

Doorwin energy-efficient integrated glazing units feature double-pane glass, warm-edge spacers, argon gas fill, Low-E coatings, and fully tempered glass, they can not only create a comfortable and natural indoor environment but also save electricity bills and heating bills of more than 100 USD for the owner, it’s a real bargain compared to choosing a regular glazing set.

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.