Low-E Coatings

Low-E Coatings

Low-emittance (Low-E) coating are microscopically thin, virtually invisible, metal or metallic oxide layers deposited on a window or skylight glazing surface primarily to reduce the U-factor by suppressing radiative heat flow. The principal mechanism of heat transfer in multilayer glazing is thermal radiation from a warm pane of glass to a cooler pane. Coating a glass surface with a low-emittance material and facing that coating into the gap between the glass layers blocks a significant amount of this radiant heat transfer, thus lowering the total heat flow through the window. Low-E coatings are transparent to visible light. Different types of Low-E coatings have been designed to allow for high solar gain, moderate solar gain, or low solar gain.

Ref.: Window Technologies

Technopolis Project

Technopolis 2

India

One of my Freelance for a Facade consultant in Singapore. Scope: building facade conceptual details.

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Advanced Message Search

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Hangzhou Project

HANGZHOU PROJECT

Hangzhou, China

Architect: Callison Architecture

Facade Consultant: HS&A Ltd.

Commercial building with 5 residential blocks. Building envelope consist of stone cladding, curtain wall, skylights, glass canopies, channel glass walls, window wall, spider point fixings, shop fronts, alum. cladding, louvres, sunshades, steel trellis, glass balustrades and metal roofings.

Sloped Glazing

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.

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Windows

Prior to 1900, windows in the U.S. were predominantly wood frame, with some custom metal windows (iron, bronze, steel) in institutional construction. Around 1900, some British manufacturers of custom metal windows adopted the technology of rolled steel shapes to produce special rail profiles for windows. Two of the more prominent British steel window companies opened U.S. manufacturing companies to produce rolled steel windows. The fire resistance of steel windows with wire glass helped popularize steel window use in the U.S. in the early 1900's. Catastrophic fires in Baltimore, Boston, Chicago and San Francisco led to the development of building regulations that restricted the use of combustible materials in many types of construction. After World War II, the technology of extruding aluminum frames developed and aluminum windows began to gain popularity. By the 1990's, aluminum-framed windows accounted for approximately 65% of the commercial window market. Wood, vinyl and steel-framed windows comprise most of the remaining 35% of the market.