Types of Windows

Every industry has its terminology, its "buzzwords", and the window industry is no different. Below are the basic types and configurations of windows.

Single Hung

Single Hung windows represent the overwhelming majority of windows in the South Central Region. The term refers to the design feature of a single sash hung in a frame. Popular designs feature tilt options that enable the sash to be tilted inwards for easy cleaning and screen access from inside the home. The single slider window can be thought of as its companion single hung laid on its side.

Double Hung

Double Hung windows are the mainstay of the wood window industry and have become the standard for replacement windows in most areas of the country. Both sashes are hung in a frame and can be tilted inward for easy cleaning. The double slider window can be thought of as its companion double hung laid on its side.

Picture Windows (Fixed-Lite)

Picture Windows are sometimes referred to as Fixed-Lite windows because you cannot open them. Like a picture frame, these windows have no sash and consist of glass and frame. Because they have no sash, picture windows easily outperform any hung or sliding window in terms of air and water infiltration.

Casement Windows

If there were an "elite" award for the ultimate operating window design, casement windows would win it. Casements are always in style and very popular with people who want the uninterrupted view of a picture window with the function of an opening sash. A sash in a frame with operating hardware that "cranks" and opens the sash like a refrigerator door. The harder the wind blows against a casement sash, the tighter it seals against its frame.

Awning Windows

Awning windows are like casements mounted sideways, opening outward from the bottom. They provide ventilation even during light rain.

Performance Comparison

In order of best to worst resistance to air and water infiltration by window design:

1. Picture Windows / Fixed-Lite
2. Casement Windows
3. Single Hung
4. Single Slider
5. Double Hung
6. Double Slider

Configurations

When windows are attached on top of another, it is called "stacked." When attached side by side, it is called "mulled" or "mulling." A "twin" window is two mulled together; a "triple" is three, a "quad" four. Bay windows typically feature a picture window flanked by operating windows. Bow windows usually feature operating windows on the ends and fixed windows in between.