Solar Control Glasses

The use of glass within buildings today means it is essential that consideration is made to ensure the occupants comfort is considered. Effect of the thermal performance of the glass can make a substantial impact on the building internal temperature. Heating from solar gain can be both a benefit and a problem.

The natural feature of the glass allowing heating and cooling make it a unique building product. However good design and specification is required to ensure the end result is a comfortable building.

Glass controls the solar radiation produced from the sun by:
Reflectance - the proportion of solar radiation reflected back into the atmosphere.
Absorptance - the proportion of solar radiation absorbed by the glass
Direct transmittance - the proportion of solar radiation transmitted through the glass
Total transmittance - the proportion of solar radiation transmitted through the glass by all means (also referred to as g value or solar factor).

Solar control performance of the glass can be achieved by employing one or more of the following methods:
Body tinted glass;
Coated glass;
Laminated glass incorporating either of the above and/or a tinted interlayer;
Insulating glass units incorporating any or all of the above glass types and/or an internal blind system;
Window film

By specifying the correct glazing specification, a building can be controlled to prevent overheating which could require air conditioning to reduce the building temperature to a comfortable level for the occupants and users.

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