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Main properties and functions of glass

Glass is a key component of a door or a window as it has a wide range of functions: living comfort, energy control, health, safety and aesthetics.

THERMAL INSULATION AND LOW EMISSIVITY GLASS

IG units are designed to reduce heat loss, reducing the cost of heating and air-conditioning. They are made by inserting an insulating gap of different widths, containing air or gas, between two or more glass panes. Low-emissivity glass is provided with a metal oxide coating on the inner panewhich has the function of increasing the reflection of heat absorbed by the window directing it towards the interior rooms, ensuring that heat is retained in the building. It is transparent to solar heat radiation, thus allowing it to enter inside the building and, at the same time, prevents the loss of thermal radiation emitted by heating elements.

Argon gas: a further improvement in the thermal performance of the windows can be achieved by replacing the air with inert gases, such as argon, characterised by a lower thermal conductivity.

Warm Edge spacer: The traditional aluminium spacer can be replaced by a plastic element whose thermal conductivity is much higher. Using Warm Edge plastic spacers reduces heat loss on the edges of the glass; they do not alter the Ug value of the glass, but the Uw value that indicates the thermal dispersion of the window as a whole (glass, spacer and frame).

SOLAR CONTROL AND SELECTIVE GLASS

The sun can transfer an excessive amount of heat in buildings with large glass surfaces, causing an excessive rise of temperature. However, it is possible to limit the amount of heat entering an environment without reducing light levels, thanks to the use of high performance selective glass that allows the passage through the glazed surfaces of a single component of light radiation (the one in the visible range which, therefore, allows excellent illumination), while blocking higher wavelength radiations, those located in the infrared spectrum responsible for the increase of temperature.

CONTROL OF LIGHT and DOUBLE GLAZING WITH INTEGRATED BLINDS

To ensure the control of light inside buildings, it is possible to place a blind (venetian, pleated or roller) between the two glass panes that make up the double-glazing unit. The movement of the blind, either manual or electric, does not alter the insulating properties of the double glazing and operates in a totally sealed environment which guarantees protection against dirt, dust and weathering.

SOUND INSULATION and STRATOPHONE GLAZING

Any kind of glazing mounted on a frame ensures a certain acoustic insulation. However, to improve the acoustic performance, isolating the environments from external noise, it is necessary to use laminated glass with acoustic PVB interlayer, equipped with a special sound-absorbing film, which acts as a cushion between the panes that make up the glass. Acoustic laminated safety glass (Stratophone) is formed by two or more glass panes separated by PVB films of different thicknesses.

SAFETY and LAMINATED SAFETY GLASS

The concept of security is very broad and covers various aspects: protecting people from injury caused by broken glass or from falling into the void, security against break-ins and vandalism, protection from firearms. Safety performance is guaranteed through the installation of glazing featuring two or more panes assembled by means of one or more plastic PVB films (polyvinyl butyral); the assembly structure and the number of PVB films determine the safety level (accident-proof, burglar-proof, bullet-proof).

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