Single-Hung vs. Double-Hung Windows
Single-hung and double-hung windows are the most common types of windows used in housing and commercial buildings in the U.S. Single-hung windows, which cost less, are more common, particularly in older construction, but they are harder to clean. Double-hung windows allow for greater ventilation flexibility and are easier to clean; however, they cost more to install and repair.
«Hung» here refers to a window’s sash(es) — i.e., the glass panels of a window. While it is common to think the sash refers to the movable panel of a window, both single-hung and double-hung windows have two sashes (panels). Confusion stems from the fact that a single sash is movable in a single-hung window, while both sashes are movable in a double-hung window.
Comparison chart
 | Double-Hung Windows | Single-Hung Windows |
|---|---|---|
| How They Open | Double-hung windows have two movables panels (sashes) and can often tilt inward individually as well. | Single-hung windows only have one movable panel (sash). |
| Sashes | 2, both of which are movable | 2, one of which is movable |
| Ventilation | Offers a more variable ventilation pattern depending on which panel is open and by how much; better-suited for highly-variable climates. | Provides ventilation control only by the amount of space provided between the lower panel and the bottom frame. |
| Installation | Comes in standard sizes, but not as easy to install as single-hung windows, as the window unit is heavier and requires more precise placement. Best installed by a professional or an experienced DIYer. | Easier to install than double-hung due to lighter weight and fewer moving parts. Can be a DIY project with a little help lifting the window in place. |
| Cost | Higher installation and repair costs, though maintenance costs for windows on upper floors is often cheaper. | About 10-25% cheaper than double-hung windows. Repair costs less as well. |
| Maintenance | Easier to clean as each panel can often tilt inward for access. | More difficult to clean, especially on upper floors, because the lower panel impedes access to the higher panel. |
| Popularity | A very popular choice since the 1990s, but lost some market share after 2008 recession. Most popular choice for new constructions. | Most common type of window installed in U.S. housing, but less popular in modern construction. |
Appearance
Single-hung windows, the most common type in the U.S., are those that open by lifting the bottom panel. This panel slides up and overlaps the top panel, which is fixed in place. In double-hung windows, each panel opens separately, often by sliding or tilting, allowing for greater flexibility in ventilation. Alternatively, some designs feature panel(s) that slide to one side.
As for aesthetics, both window types come in a wide range of styles and materials that are suitable for all kinds of architectural designs. However, as the more expensive option, double-hung windows tend to have a slightly larger variety of options when it comes to materials, colors, etc.
Watch the video below to learn more about different types of windows, including single-hung and double-hung windows.
Maintenance
Single-hung windows are more difficult to clean, especially if they are on an upper floor, as when the bottom window panel slides up, it partially covers the top panel. Cleaning the complete surface of the panels or the window’s frames becomes difficult.
With double-hung windows, tilting or sliding each panel individually allows for easier access, especially from inside the home. On double-hung windows that tilt open and closed in either direction, it is especially easy to clean the outside of the window while inside the home.
For single-hung windows on second floors and higher, a ladder and/or long brush may be needed. However, the brush must have soft bristles to avoid scratching the frame or pressing too hard on window panes, possibly breaking them. With double-hung windows, water pressure is often enough to clean those on second floors or higher because there’s no obstacle to reaching the panes or frames, but the water stream pressure must be moderated to avoid stripping paint or loosening the frame due to water infiltration. This type of cleaning is not advisable for single-hung windows, which are lighter and less sturdy.
Cost and Installation
Due to their simpler construction, single-hung windows are about 10-25% cheaper to buy and install, with prices ranging from $95 to $800 depending on materials and features (double-paned for insulation, UV protection, etc.). The window comes as a fixed unit in standard sizes that can be installed in a frame, then secured. Because of standardization, installation can be a DIY project with only a small amount of effort needed to lift and place the window properly. To learn how to install and/or replace a single-hung window, watch this video.
Double-hung windows present a different challenge, as each panel (upper and lower) requires its own installation check to ensure that it will open and close properly. Although double-hung windows also come in standard sizes and fit all common frames, they are heavier and require more precise seating in frames. Professional installation is recommended unless the person is an experienced DIYer. Average prices range from $150 to $1,000, depending on materials and features.
Energy Efficiency
In most buildings, roughly 40% of heat transfer occurs through windows, so one factor to consider when choosing between single-hung windows and double-hung windows is their energy efficiency.
Single-hung windows are more energy efficient because of their immovable panel (sash), which results in fewer gaps that could let in drafts. Insulation to avoid heat loss is improved by double-paned construction, where the window has dual layers of glass with a vacuum between them. The vacuum blocks heat transfer to better regulate the house’s temperature. Though single-hung windows remain more efficient, double-hung windows have improved greatly in this respect and as also come in double-paned models.
Depending on the type of window and its energy efficiency, some windows may come with an additional benefit: a discount on an electric bill. Some local jurisdictions and state governments have created tax breaks for businesses and individuals who install energy-efficient windows.
Security
Double-hung windows are more secure than single-hung windows. Not only do double-hung windows have two locks, versus one for most single-hung windows, but they also have stronger frames and sashes to accommodate their additional weight. This makes them more difficult to break.
Essential Double Hung
The Marvin Essential ™ Double Hung window offers a classic look with clean lines and simplified design. With strong, durable fiberglass to the exterior and interior, this window is virtually maintenance-free. Streamlined options offer just the right level of customization, and the window tilts and removes for easy cleaning.
FOR THE PROS
Find technical documents for this product, including installation instructions, sizes and elevations, 3D drawings, architectural detail manuals and more.
Features of the Essential Double Hung Window
- Available in heights up to 6.5 feet or widths up to 4 feet
- Durable and low-maintenance material to the interior and exterior
- Low-profile, easy to operate locking mechanism
- Insert replacement option is available to fit seamlessly into existing
window openings - Top and bottom sash tilt and remove easily for maintenance/cleaning
Marvin Essential
A simpler way to achieve design, quality and performance.
Materials
Our proprietary, durable fiberglass to the interior and exterior.
Energy Efficiency
Options that help achieve long-term performance and cost savings, in
any climate.
Design Options
Exterior Finish
A strong alternative to vinyl, our Ultrex ® pultruded fiberglass exterior finish is applied through a patented process to provide a superior, consistent finish. The American Architectural Manufacturers Association (AAMA) awards certifications to materials that pass numerous, rigorous tests. These tests simulate the harsh conditions that a finish will encounter throughout the life of the window or door. Passing these specification tests and achieving AAMA 624 verification gives independent verification that the Ultrex finish is best in class among fiberglass products.
Built for durability and low-maintenance, our Ultrex finish is 3x thicker than competitive finishes, with a smooth consistency and strong finish that resists fading, chalking, peeling and cracking, even in the darkest colors. If a design change calls for a new color down the road, our material can be painted without voiding our warranty. Six colors are available in neutral and dark tones.
*Finish samples are approximate and colors on screen can vary. Visit your local dealer to see actual color samples.
What is a Double-Hung Window?
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A double-hung window is a window that features an upper and lower window sash that slide vertically past one another in a single casement. Perhaps one of the most traditional styles of windows, this type of window typically features the lower sash in front of the upper sash. Each sash may be a solid pane of glass or may be divided into separate lights by built-in muntins or for decorative purposes, may have a snap-in, removable grid to create the illusion of separate lights.
A double-hung window is designed with two grooves in the side jambs that allow each window sash to slide separate from one another. Some have a full window screen, allowing for ventilation from the top or bottom of the window at any time, while others have only a half-screen that needs be positioned accordingly. The ability to have a ventilation area equal to half of the window’s total area is one reason the double-hung design is so widely used.
This style of window is also a popular choice for replacement windows. It is valued primarily for its versatility. Some of the features that modern double-hung windows have include insulation for improved energy efficiency, tilt-in sashes that make cleaning the outside of the window easy, and UV protection.
In addition to versatility, double-hung windows are also stylish. They are available in vinyl and wood casements and additional features, such as transoms, can be used with them. Additionally, a double-hung window can be arranged in different ways. Single window units can replace a worn out or dysfunctional window. In groups of three or more, double-hung windows fill larger wall space while maintaining the ventilation and versatility that are lacking in a picture window.
The installation of a double-hung window is fairly quick and simple and can be done by both an experienced do-it-yourselfer or by a professional. A professional window company can typically replace all the windows of an average home in under two days time. While replacement windows of any kind will add value to a property, a double-hung window is almost a guaranteed value because it is both a stylish and functioning window.
