Selecting Glass
The correct choice of glass, by the design professional for a particular glazing application requires the consideration of a number of characteristics.
The Color and Appearance:
The use of reflective coatings on the second surface enhances the tint of the base glass. In general glass colors are subtle and need to be carefully evaluated.
Thickness: The thickness of glass to be used is usually decided by the strength and stiffness requirements. The color and appearance of tined glass will change with the glass thickness because thicker glass absorbs more transmitted light and hence appears to be darker.
Visible Light Transmission: Interior daylight levels will be determined by this value. Residential applications generally require higher levels than in commercial buildings for obvious economic reasons.
Solar Transmission and Absorption: The Shading coefficient is the best measure of how much solar energy is admitted through a glazed opening.
Solar Energy Transmission: Expressed as a percentage of the solar energy,ultraviolet, visible and near infrared energy (300 to 3000 nanometers) that is directly transmitted through the glazing. The lower the percentage the more effective the glazing is in reducing solar heat gain.
Reflectance: The percentage of the solar energy reflected away from the exterior surface of the glazing. The higher the percentage, the greater the total reductions in solar heat gain.