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Glass TypesPlease refer to the glass manufacturers on our links page for further advice and/or our QuikSpecs The most common types are detailed below. However, other infills can be accommodated including Polycarbonate, GRP & insulated panels:- Laminated Glass Laminated glass consists of two sheets of glass bonded together with an interlayer. Commonly used are
two sheets of annealed glass 3mm thick joined using a 0.4mm interlayer providing a finished pane 6.4mm
thick. Alternatively, an interlayer 0.8mm thick is commonly available, offering a higher safety rating (see
below). The glass is still breakable and is a little stronger than in its original form. However, the glass
simply cracks and remains in place due to the bonded interlayer. This type of glass is also commonly
used in the motor industry for car windscreens. Toughened glass may also be laminated to form a stronger
pane when required. Laminated glass is currently the most commonly used type of single glazing for
canopies, walkways, railway platform glazing and other unheated spaces. It is also suitable to use as the
inner pane to double glazed units with Toughened on the outer pane.6.4mm Laminated Glass obtains BS6206 Class B Safety Rating 6.8mm Laminated Glass obtains BS6206 Class A Safety Rating ALL laminated glass with a PVB interlayer minimum 0.8mm thick obtains BS6206 Glass A Safety Rating We do not recommend the use of Toughened Glass in single glazing or to the inner pane of double glazed units over swimming pools, food & beverage preparation units or any areas where the small broken pieces characteristic to this glass type, could cause subsequent injury due to contamination. In these situations laminated glass or polycarbonate are preferable. Toughened Glass  Toughened safety glass is manufactured by heating common annealed glass to a temperature in excess of
600ºC causing it to soften. The surfaces of the glass cool quickly creating high compression resulting in
up to five times increased strength. In the event of breakage, the pane shatters into relatively harmless
small pieces of glass called ‘dice’. Whilst these dice may cause small cuts, it is unlikely serious injury
will occur, so it is deemed to be ‘safety’ glass. It is important any cutting, polishing of edges or drilling
be done before the process as once ‘toughened’ the glass cannot be worked on and is simply likely to
shatter. Toughened glass is most suitable for the upper pane of double glazed units or in single glazing
where the overall height above floor level does not exceed 5 metres.All Toughened Glass has BS 6206 Class A Safety Rating Wired Safety Glass  It is important not to confuse Wired Safety Glass with Wired Glass. The former has thicker wire which enables classification to BS6206 Class C Safety Rating, while the latter is now no longer suitable. Wired Glass has been used since the end of the 19th century for overhead glazing as the wires hold together any broken pieces of glass providing a similar, but not as efficient function as the PVB interlayer on Laminated Glass. Wired Safety Glass provides fire resistance, though care must be taken to ensure a suitable glazing system is also utilised to provide the required half hour or one hour protection. |
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