double-hung (sash )window

Англо-русский словарь технических терминов . 2005 .

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Sash window — A Georgian house in England with sash windows A sash window or hung sash window is made of one or more movable panels or sashes that form a frame to hold panes of glass, which are often separated from other panes (or lights ) by narrow… … Wikipedia

sash window — noun a window with (usually two) sashes that slide vertically to let in air • Hypernyms: ↑window * * * noun : a window consisting of sash usually double hung to slide vertically in a window frame compare casement window * * * sash window noun A… … Useful english dictionary

double-hung window — noun a window having two sashes that slide up and down • Hypernyms: ↑window • Part Meronyms: ↑shutter * * * noun, pl ⋯ dows [count] US : a window that can be opened either by sliding the bottom half up or by sliding the top half down called also… … Useful english dictionary

double-hung — /dub euhl hung /, adj. 1. (of a window) having two vertically sliding sashes, each closing a different part of the opening. 2. (of a window sash) sliding vertically, with a counterweight on each side. [1815 25] * * * … Universalium

double-hung — /ˈdʌbəl hʌŋ/ (say dubuhl hung) adjective (of a window) having two sashes, each balanced by sash cords and weights in order to move up and down to open and close the window … Australian-English dictionary

double-hung — | ̷ ̷ ̷ ̷| ̷ ̷ adjective of a window sash : supported on each side by a counterweighted sash cord or a spring tension device for easy raising and lowering and holding position … Useful english dictionary

double-hung — adjective Date: 1823 of a window having an upper and a lower sash that can slide vertically past each other … New Collegiate Dictionary

Window — This article is about the part of a building. For the Microsoft operating system, see Microsoft Windows. For other uses, see Window (disambiguation) and Windows (disambiguation). Pair of windows, Old Ship Church, Hingham, Massachusetts … Wikipedia

window — windowless, adj. windowy, adj. /win doh/, n. 1. an opening in the wall of a building, the side of a vehicle, etc., for the admission of air or light, or both, commonly fitted with a frame in which are set movable sashes containing panes of glass … Universalium

sash fastener — noun a lock attached to the sashes of a double hung window that can fix both in the shut position • Syn: ↑sash lock, ↑window lock • Hypernyms: ↑lock • Part Holonyms: ↑window … Useful english dictionary

sash lock — noun a lock attached to the sashes of a double hung window that can fix both in the shut position • Syn: ↑sash fastener, ↑window lock • Hypernyms: ↑lock • Part Holonyms: ↑window … Useful english dictionary

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 versus Single-Hung Windows comparison chart

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	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.

Single-Hung vs. Double-Hung Windows: Which One to Buy?

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Single-hung and double-hung windows are two of the most basic, classic, and timeless styles of windows you can install in your house. If you ask a child to draw a house, he or she likely will not draw a modern slider window, a casement window, or a picture window. Almost certainly, they will draw a box with a gable roof and a single-hung or double-hung window.

If these are indeed the most iconic type of window you can buy, why is this so? Does your house need either type of window? And what is the difference between these two windows that sound much alike?

What Are Single-Hung and Double-Hung Windows?

Single-hung windows and double-hung windows are two different types of windows. Though different, they will look identical from a distance. Both single-hung windows and double-hung windows are vertical-sliding windows with an upper and a lower sash. A sash is the square or rectangular frame containing the window glass and may include smaller pieces called muntins that divide the glass.

The difference is that with single-hung windows, only the bottom sash moves and the top half is permanently fixed. With double-hung windows, both sashes slide up and down. With fewer moving parts, single-hung windows conceivably are more weather resistant. Yet double-hung windows can be safer for children and pets since the top sash

Single-Hung Windows: Pros and Cons

Single-hung windows predate double-hung windows and may be preferred for an authentic look on historic homes. In modern homes, single-hung windows additionally may be preferred because they cost a bit less than double-hung windows.

Also, it is often argued that single-hung windows are less susceptible to air infiltration, or leakage, simply because the upper sash is fixed and cannot develop looseness the same way a moving sash can. This won’t be reflected in performance ratings, as both types of windows must meet the same standards. But in use, window seals tend to degrade over time, and a moving sash cannot be sealed with caulk like a fixed sash can.

If the upper sash of a single-hung window breaks, a glazier must come in and repair the window. With a double-hung window, though, the homeowner could replace the upper sash.

What Is a Glazier?

A glazier is a window expert with a very specific skill: Glaziers lessen the need for artificial lights in the home by installing glass in windows and displays.

Fewer moving parts

Not safe for children or pets when lower sash is open

Double-Hung Windows: Pros and Cons

The double-hung window is the most common style of window available today. And the reason is simple: double-hung windows are easier to clean.

Double-hung windows with tilt-in (also called tilt-out) design can be cleaned from inside the house. With single hung windows (and older double-hung windows without tilt-out function), it’s difficult or impossible to clean the outside of the lower sash from indoors. You have to reach it from the outside—easy if the window is ground-level, difficult if the window is upper-level.

Single-hung windows can also have a tilt-in or removable lower sash, but you still have to reach outside the window to clean the upper sash, a perilous task.

The ability to open the upper sash on a double-hung window is another advantage in terms of airflow. Sometimes it’s nice to open the upper sash and not have air blowing in from below. You can also create a minor recirculating effect by opening both sashes about halfway or less. In theory, this allows warmer air to escape through the upper sash and cooler air to enter through the lower sash. But in reality, this natural convection has little cooling effect on a room.

Finally, for homes with small children, double-hung windows’ top opening sash allows you to keep the lower sash closed, yet still have airflow coming through the open top.