FURTHER INFORMATION
Some Terminology
Understanding terminology relating to thermal transmittance (U-Value) and solar heat gain coefficient (SHGC) are important in selecting glazing that will keep your home or office warm in winter and cool in summer.
U-Value is a measure of the rate of conductive heat transfer or insulation between indoors and outdoors, through the glass as a result of temperature difference inside and outside. The U-Value is dependent on the configuration of the unit, which includes the glass type, thickness and spacer bar width. As the U-Value decreases so does the amount of heat that is transferred through the glass. The lower the U-Value, the better the insulation.
Solar Heat Gain Coefficient (SHGC) is the proportion of directly transmitted and absorbed solar energy that enters the building’s interior. It includes direct solar transmittance plus indirect heat gain from re-radiation (conduction) of absorbed heat from the glass. The lower the number, the less the heat gain and better solar control.
Low E Glass
Glass products with a Low E coating are useful for reducing solar heat gain and loss. The Low E coating incorporated into the glass reduces the emissivity (rate of emission of absorbed heat) of the glass surface, thereby providing greater insulation.
Frame Design
Our Insulated Glass Unit Warranty requires that frames are designed in accordance with AS 4666
Frames can be timber, aluminium, uPVC, or steel. It is essential to ensure the edges of Insulated Glass Units do not come into contact with or be allowed to remain in contact with water, as this can cause premature seal failure and/or delamination. Chevron Glass requires impervious weather seals and/or an adequate weep or drain system to prevent this from occurring.
Installation
Chevron Insulated Glass Units must be properly installed in accordance with AS/NZS 4666, (see below). It is essential to seek advice from the material suppliers/ manufacturers that the type of glazing compound, sealant or gaskets is compatible and suitable for the chosen glazing system. When Chevron Insulated Glass Units are specified for structural glazing (ie. structural silicone as the secondary seal), it is the installer’s responsibility to ensure that the glass types and all other components to be used (such as setting blocks, backer rods, structural silicone and glazing compounds) are compatible with the structural silicone used to seal the Insulated Glass Units. It is essential that this is checked with the material suppliers/manufacturers for compatibility and suitability for each project.
Please note Chevron Insulated Glass Units with structural silicone as the secondary seal must be specified at the time of enquiry/order.
Warranty
Chevron Glass provides a limited Warranty which should be read in conjunction with the Chevron Glass Terms and Conditions of Sale currently in force, available on our website.
A copy of the Warranty is available on request to our office.
AS/NZS 4666 – Insulated Glass Units
This standard sets out the performance requirements and guidelines on the selection and installation of Insulated Glass Units.
For more information, please ENQUIRE here.