Solar control glazing

Reflective glass types

Reflects most of the sun's rays (both light and energy). Different technologies are used to apply the reflective layer:

Pyrolytic - Can be placed on the 1st and 2nd layers in insulating glass. Manufacturing: 600°C, at atmospheric pressure.
Vacuum magnetron - developed for layer 2 of insulating glass. Manufacturing: on low pressure.

Although the production technology of the two product groups is very different, both are hard coated glass. There is a significant difference in style between them, which is a factor to consider in addition to the parameters. Reflective coatings should not be applied on the third layer, as the glass may overheat and shatter!

They are made of tinted glass

They absorb most of the sun's rays. Colouring is achieved by mixing a metal oxide colourant into the glass material during manufacturing. Standard colours: green, bronze, grey. Individual options: dark grey, azure, dark blue. The thicker the glass, the more intense the colour effect and the greater the heat absorption. When using this type of glass, always check the heat absorption and, if necessary, calculate the heat treatment of the glass to avoid heat breakage!

Reflective solar control glass can also be made by coating the base glass with a tinted material.

These 3 product ranges are generally characterised by the need to be combined with low-e coated glass to achieve a modern low Ug value!

Multifunctional glass

Coated solar control glass is the term used to describe coated glass that can achieve good Ug value on its own (without the need for a separate low-e coated glass), while limiting solar transmission.

A significant proportion of this range has a neutral appearance and high selectivity, but there are also types with higher reflectance and stronger tinting.

Application suggestions

Always use the outer glass panel as a sunscreen to achieve the best SF value. If we do not, the energy absorption of our insulating glass will increase, and consequently the secondary internal heat transfer coefficient (the energy absorbed is reflected back into the interior) will increase, and thus the total energy transmittance will be higher. The threat of thermal breakage due to increased energy absorption can also make such insulating glass dangerous.

In the case of 3-layer insulating glass, it is particularly advisable to choose a multi-functional type for the outer glass pane, as this will introduce the necessary property of low Ug into the structural design, and only the other two glass panes on the interior side will need to be low-e coated.

If normal reflective or tinted solar control glass is used as the outermost panel of the 3-layer insulating glass, then to achieve the required low Ug value, both additional glass panels must be low-e coated - the middle panel will then be at risk of breakage, which can only be avoided by adding heat-treated low-e glass to the structure. This will increase the time needed for the manufacturing process and, of course, the cost of the structure will increase significantly.

If you have any further questions, please do not hesitate to contact our sales team!