Editing Window (section)

=== Coverings ===

A [[window covering]] is a shade or screen that provides multiple functions. Some coverings, such as drapes and blinds provide occupants with privacy. Some window coverings control solar heat gain and glare. There are external shading devices and internal shading devices.<ref name="Windows">Beckett, H. E., & Godfrey, J. A. (1974). ''Windows: Performance, design and installation''. New York, NY: Van Nostrand Reinhold Company.</ref> Low-e [[window film]] is a low-cost alternative to window replacement to transform existing poorly-insulating windows into energy-efficient windows. For high-rise buildings, [[smart glass]] can provide an alternative.