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Window Glazing – Type of Glass and Function

Window Glazing

Glazing is a part of the window which is made of glass. Common types of glazing used in the building industry are float glass, tempered glass, laminated glass, etc., all of which can be glazed singly or double or triple glazing units.

Single Glazing

Describes the performance of a window by a single pane of glass.

Double Glazing

Describes the performance of a window by two panes of glass.

The space between them is filled with air or gas fill (usually krypton or argon) which is sealed tightly

Gaps vary from 6mm to 12mm,12mm being better optimal performance

Prevents heat and energy loss from inside

More energy-efficient than single-pane

Triple Glazing

Consists of three panes of glass separated by air or gas fill

The space between them is filled by gas (usually krypton or argon) which is sealed tightly

Prevents heat and energy loss from inside

More energy efficient than double pane

Glazing by Function

1.Thermal Insulation-Insulating Glass

LOW EMISSITIVITY GLASS (LOW-E GLASS)

Glass with a special invisible film of metal coating that reflects and blocks out heat

Thin coating of metal bounces the sun rays back and controls interior temperature

Two types of low e glass passive and solar control

REFLECTIVE GLASS

Glass is treated with a metallic coating that cuts off solar heat

This coating also gives a one-way mirror effect, preventing visibility from outside thus maintaining privacy.

2.Sound Insulation- Sound Insulating Glass

ACOUSTIC GLASS

Consists of two or more sheets of glass bonded together with one or more acoustic interlayers.

3.Safety and Security – Safety Glass

TOUGHENED GLASS

This type of glass is tempered and is stronger than ordinary glass

An annealed glass is heated in a furnace up to 600 c or above and then quickly cooled down

Clear and maintain visibility

Used in structural glazing windows, fire-resistant doors etc.

LAMINATED GLASS

Consists of two sheets of glass that are pressed and bonded under heat

A thin layer of plastic or resin is sandwiched between them finishing lamination

It absorbs ultraviolet light and heat

Mostly fitted on the exterior face of window.

4.Decorative-Structured Glass

TRANSCULANT/ETCHED GLASS

Decorative glass put through a process of etching to produce a frosted pattern

Artistic carving on the surface leave a white frosted finish

Used to create designs on glass for glass doors, windows, furniture, etc.

SELF CLEANING GLASS

Glass with a special chemical coating (titanium dioxide) on the outer surface that reacts with daylight to break down dirt

Cleanses itself by daylight and rain

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