The Double-Hung Window Comes Out on Top

Single and double-hung windows were standard in older homes, and have recently made a comeback in window replacement and new residential installations. The double-hung window is a common sight in the traditional homes of the East Coast, but also complements contemporary home designs.

Both single and double-hung windows feature two sashes, stacked vertically. Either one (single) or both (double) windows slide up and down within the frame, overlapping. Single and double-hung windows operate by means of a system of springs, counterweights, or friction. Contemporary double-hung windows feature tilting and removable sashes, a bonus for easy cleaning and maintenance.

The vertical sliding window design has several advantages over the casement style. Since the windows do not open outward, they avoid exposure to the elements and last longer. Single and double-hung windows have a life span of at least twenty-five years. In addition, the parallel sliding panes save space. Casement windows, by comparison, require a clear space around the open window. This space is not always available--around walkways and other heavy traffic areas, for example--and sliding double-hung windows offer an important alternative.

The double-hung window design is not inherently energy-efficient, so it is important to choose materials and installation methods that eliminate air and moisture leaks. Custom window construction and precise measurements can go a long way to sealing drafty windows. But most double-hung windows incorporate other energy-efficient window features as well, such as high performance glazing, double or even triple-paned windows, and wood or vinyl frames. Aluminum frames are an economical option, but offer less energy efficiency than other materials.

Double-hung windows feature a simple and durable design, but can present a challenge when it comes to blocking out the elements. Fortunately, window manufacturers offer a broad range of energy-saving solutions.