Terminology - Glass Types
Single sheet of glass, generally 4 - 6mm thick.
Although this type of glass allows maximum daylight
transmission, this is offset against a greater heat
loss and energy transfer, therefore making double Single Glazed
glazing the more desirable option.
Two sheets / panes of glass (generally 4 -6mm thick)
separated by an airspace (which can be filled with a
gas) and sealed airtight (hermetically) around the Double Glazed
perimeter using a spacer bar providing insulation,
sound reduction and reduced possibility of
condensation.
Three sheets / panes of glass (generally 4 -6mm
thick) separated by an airspace (which can be filled
with a gas) and sealed airtight (hermetically) around
Triple Glazed the perimeter using a spacer bar. Provides greater sound reduction properties, increased energy
efficiency, however this is offset against a higher
price.
Two or more sheets of glass with an inner layer of
transparent plastic which the glass adheres to if
broken, therefore reducing shards of glass and risk Laminated Glass
TRANSPARENT of injury to people. Commonly known as safety
FILM glass, it can also provide sound reducing properties,
however the units can be heavy.
Another type of safety glass has been specifically
heat treated so that if broken it separates into very
small pieces. Commonly used in doors or areas Toughened Glass
where safety is of importance. Weight is an issue
with this type of glass however.
PYROLYTIC
COATING Also known as “Pyrolytic” coating, the coating in
sprayed on to the surface of the glass at a very high
temperature during the glass making process. Hard
Low “E” Glass OUTER coat, one of the earliest types of coated glass INNER PANE PANE reduces heat loss and allows high levels of solar
(Hard Coat) heat gain. Hardcoat is catorgorised as a meduim performance glass.
PYROLYTIC
COATING
Glass which has a low emissivity (Heat Transfer) due
to a metallic or film coating on or between the glass Low “E” Glass
panes to reduce the radiant heat transfer / loss. This OUTER
INNER PANE type of glass provides the highest level of
PANE (Soft Coat) performance but is more expensive than hard coat.
A textured finish to a pane of glass, used for privacy,
light diffusion or decorative effect (i.e frosted, etched, Obscure Glass
fluted etc)
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