How a window hangs affects its function. Do you know what you need out of a window? Let's take a look at two of the most popular vertical sliding window styles in modern homes. Single-hung windows feature a fixed upper sash, meaning only the bottom sash can slide vertically for ventilation while the top portion remains stationary. Double-hung windows, on the other hand, allow the upper and lower sashes to move independently, offering greater flexibility for airflow and cleaning.
That said, picking the right window style can help improve your home’s curb appeal and lower energy bills. Plus, replacing old windows is one of the most valuable improvements you can make, featuring up to an 85% return on investment (ROI). At US Window and Door, we’ve been helping homeowners with window installation for over 30 years, and we’re here to help you find the best fit for your needs. This article will cover the differences between single-hung and double-hung windows.
Understanding Single-Hung Windows
A single-hung window has two sashes, but only the bottom sash opens. The bottom, operable panel can slide vertically to open, allowing fresh air to enter the home, while the top sash remains stationary. Single-hung windows represent a more traditional style and commonly appear in older homes. They offer a slightly more affordable option compared to double-hung windows.
A key advantage of single-hung windows is their simplicity. With fewer moving parts, they are generally easier to operate and maintain over time. They provide a timeless look, complimenting the look and feel of many homes. Similarly, because of their single opening sash, they have screens covering only half of the window, which some people may prefer for visibility.
However, single-hung windows do have some limitations when it comes to ventilation and cleaning. Because only the bottom sash can open, they offer less flexibility in terms of airflow compared to double-hung windows. Milgard windows have tilt-in or sash-removable functionality for operable sashes, allowing you to clean the window inside the home. However, cleaning the exterior of the top sash on single-hung windows can be challenging because only the bottom sash operates, and the top sash remains fixed.
Exploring Double-Hung Windows
Double-hung windows also feature two sashes, but the top and bottom sashes are both operable in this window type. Each sash can slide vertically, independent of the other, providing greater control over ventilation. You can open the bottom sash for cool, fresh air to enter while simultaneously opening the top sash to allow rising warm air to escape. This feature creates a natural circulation effect that can help improve air quality and comfort in your home.
Another significant benefit of double-hung windows is how easy they are to clean. Most designs allow you to tilt both sashes inward, making cleaning the exterior glass from inside your home convenient and a breeze. This ease of access is beneficial for windows on upper floors or hard-to-reach areas that would otherwise require external cleaning.
Double-hung windows offer a more modern and versatile look than single-hung windows. They are available in various materials, colors, and finishes to suit various design preferences. However, double-hung windows typically come at a slightly higher cost due to their additional functionality and features.
Key Differences Between Single-Hung and Double-Hung Windows
When choosing between single-hung and double-hung windows, our experts can guide you in selecting the best option for your home. That said, consider their primary differences.
1. Difference in Screens
Since single-hung windows have only one moveable sash, they usually come with a screen that only covers the bottom half of the window, giving you the full view from the top sash. Some owners prefer this look instead of a double-hung window screen, which, by necessity, covers the entire window from bottom to top.
2. Differences in Ventilation
One of the most significant differences is the amount of ventilation each type provides. Double-hung windows offer superior ventilation options because the top and bottom sashes are operable. This unique function allows the top sash to release rising warm air while opening the bottom sash, which draws in cooler fresh air from the outside. The ability to create this natural circulation makes double-hung windows ideal for maximizing airflow, especially on upper floors. Plus, they allow for a cross-breeze by opening both sashes, making them better suited for rooms prone to moisture buildup.
In contrast, single-hung windows only allow you to open the bottom sash, limiting the amount and flexibility of ventilation you can achieve. While they still provide airflow when the bottom sash is open, single-hung windows are better suited for rooms requiring less ventilation, such as ground-floor spaces. However, in Southern California's warm weather, having that additional ventilation in every room may be a nice feature as the air cools at night. Rapidly swapping warm for cold air helps your family stay comfortable while saving energy because they would likely use the HVAC system less often than with single-hung windows.
3. Potential Differences in Energy Efficiency
Windows accounts for 25-30% of residential heating and cooling energy use, making energy efficiency crucial.
Single-hung windows are generally considered slightly more energy-efficient than double-hung windows. Because single-hung windows have fewer moving parts and seals where air can potentially leak, they allow less air infiltration. The fixed upper sash creates a tighter seal.
However, the difference in efficiency is often minimal, and Milgard ensures energy efficiency ratings above code requirements for all its products. Therefore, their high-quality, well-made double-hung windows also provide excellent energy efficiency. Factors like the window material, the number of glass panes, low-emissivity (Low-E) coatings, gas fills between panes, and proper installation tend to significantly impact the overall energy performance more than the operating type.
4. Differences in Cleaning and Maintenance
Double-hung windows are typically easier to clean and maintain. Milgard's designs have a tilting function for each sash, enabling you to clean the exterior glass surface inside your home, which is incredibly convenient for second-story or other hard-to-reach windows.
With single-hung windows, you can only tilt in or remove to access the bottom sash from the inside for cleaning. To wash the exterior of the upper sash, you may need to clean it from the outside, often requiring a ladder for large or upper-floor windows, making a thorough cleaning of single-hung windows more challenging. The additional cost of a cleaning crew to handle these types of windows may make up the difference in initial costs compared to being able to clean the windows yourself.
5. Differences in Cost
Single-hung windows are usually less expensive than comparable double-hung windows. On average, they cost 10-20% less than double-hung windows of the same size, material, and style.
The simple design and fewer moving parts of single-hung windows make them more affordable to manufacture and install. Homeowners on a budget often opt for single-hung windows to save on costs. The price difference can increase if you replace many windows at once. However, their added features may justify the slightly higher cost of double-hung windows and flexibility for many homeowners.
6. Differences in Security
While Milgard makes its products as securely as possible no matter which style you choose, there are some inherent user and functionality security considerations to consider. Since single-hung windows have one fixed sash, there are fewer moving parts to leverage or break if someone tries to get in. The frame has some additional strength from that fixed sash, which may not be available for double-hung windows. Additionally, since there's only one sash to open or close, a homeowner is less likely to forget to close and lock it.
With a double-hung window, the homeowner may not remember if they opened the upper window for venting while getting used to their new window style. If they aren't commonly looking at the window's top edge to see if both sashes are closed, they may inadvertently leave the window open before leaving the house. Additionally, double-hung windows require both sashes to be fully closed before they lock. Pushing the upper sash closed by moving it up is less natural for people than pushing a window sash down. Depending on the window's height compared to the operator, closing the window may be more challenging. Luckily, with Milgard SmartTouch locks, it's much easier to know when the window is fully closed, and if it's closed, it's locked.
How to Choose Between Single and Double-Hung Windows and When to Combine Selections
When deciding between single-hung and double-hung windows, evaluate factors such as affordability, energy efficiency, ventilation, and ease of cleaning. Each window style has benefits, making it suitable for different situations. Our team can help you decide on the best option for each window in your home, but below are some common considerations.
Single-Hung Windows: Affordable and Energy Efficient
Single-hung windows are a great choice for homeowners looking for an affordable, energy-efficient option. With only the bottom sash operable, single-hung windows are more cost-effective and offer slightly better energy efficiency due to fewer moving parts and a fixed upper sash. They also provide cleaner sightlines, as the screens only cover the bottom half of the window, allowing for a clearer view of the outdoors and more natural light to enter your home.
Additionally, single-hung windows offer slightly enhanced security compared to double-hung windows. Since the upper sash is fixed and cannot open, it reduces the potential entry points for intruders and that makes it more difficult for them to access your home through the windows. If you aren't concerned with added ventilation or ease of cleaning, a cost-effective single-hung may be your best choice.
Double-Hung Windows: Versatile and Easy to Clean
Double-hung windows offer versatility and ease of cleaning. With both sashes operable, you can tilt them inward to clean both sides of the glass from inside your home, reducing the need for a ladder or special equipment. This feature helps with windows on upper floors or hard-to-reach areas.
Double-hung windows also provide enhanced ventilation options. Opening the top and bottom sashes creates a natural airflow that allows cool, fresh air to enter the bottom while warm, stale air escapes through the top. This improved air circulation can help maintain a comfortable and healthy indoor environment. If ease of cleaning and circulation are most important to you, a double-hung window may be the right choice.
Combining Single and Double-Hung Windows for Optimal Functionality and Cost Savings
Luckily, you don't have to choose just one window style for your entire home. Combining single and double-hung windows can provide the best of both worlds regarding functionality, cost savings, and energy efficiency.
For instance, in a multi-story home, you can install single-hung windows on the ground floor and double-hung windows on the upper floors. This approach allows you to take advantage of the affordability and energy efficiency of single-hung windows, which are easily accessible for cleaning from the outside. On the upper floors, double-hung windows provide the convenience of tilt-in sashes for easy cleaning and increased ventilation options. They also offer increased ventilation in an area of the home that tends to need it more.
By strategically combining single- and double-hung windows throughout your home, you can optimize your budget while ensuring each room has the most suitable window style for its specific needs. This mix-and-match approach allows you to prioritize factors such as cost, energy efficiency, ventilation, and ease of maintenance based on each space's unique requirements.
Making the Right Choice for Your Home
Ultimately, deciding between single-hung and double-hung windows comes down to your home's specific needs, preferences, and budget. Consider factors like the location of the windows, your home's architectural style, and your priorities in terms of ventilation, cleaning, and energy efficiency. Single-hung windows can be a practical and cost-effective choice for hard-to-reach areas like above kitchen sinks. On the other hand, double-hung windows are ideal for maximizing ventilation, particularly on upper floors where rising hot air should escape through the top sash.
Your home's age and architectural style are important when choosing the right windows. Single-hung windows often suit older homes with their classic look, but modern double-hung designs offer a similar aesthetic with added functionality. Climate and ventilation matter, too. If you're in a humid area or have moisture-prone spaces like bathrooms or kitchens, the better airflow of double-hung windows would be a better choice.
If easy maintenance and cleaning are top priorities, double-hung windows offer the convenience of tilt-in sashes for accessing interior and exterior glass. The classic look of single-hung windows may better fit traditional home styles, while double-hung windows provide a more updated and versatile appearance.
If you're looking for a quote on new windows and want excellent advice from a company that's been around for decades, look at our selection of window styles and get your free estimate today. Our expert installers help access your home and help you decide between single-hung and double-hung windows.
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