Monday, June 9, 2008
Skylights have been used for over a century to provide interior daylighting. Early skylight systems consisted of plate glass (later wire glass) in metal frames and frequently incorporated both an exterior skylight and a decorative interior "diffuser" or "laylight". Most contemporary skylights now consist of insulating glazing captured in aluminum frames that in many configuration (e.g. single slope, ridge, pyramid, barrel vault). Skylights are engineered systems that are assembled from standard or custom extrusions provided by skylight manufacturers, and i.g. units made by glazing fabricators, but they share common design elements required to make them perform. In the construction industry, the term "skylight" is often applied to relatively small shop-fabricated unit-skylights, frequently with plastic glazing.