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PERFORMANCE:
CHOOSING THE RIGHT OPTION
SINGLE GLAZING
It is estimated that in an uninsulated home up to 30%
of heat entry can be attributed to clear single glazing.
In these situations single clear glazing is recommended
only for shaded windows, where glare is not a concern or
where maximum natural daylight is required. With the substitution
of a tinted or reflective glass, the amount of heat entry
can be reduced in some instances by as much as 80%. However
up to 50% of winter heat loss is generated through single
glazing of any type (except for low-E glass).
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DOUBLE
GLAZING or IGU
Double glazing or insulated glass units (IGU) have
better insulating qualities than single glazing. When using
the U-value performance indicator which measures the amount
of heat transfer, IGU’s decrease this rate of heat
transfer by up to 50%. This means a cooler or warmer environment
with lower energy costs. With the substitution of tinted,
reflective and low-E glass the level of performance (i.e;
heat entry) can be increased greatly depending on the needs
of the glazing design.
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GLAZING
TYPES AND SURFACE POSITIONS
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Single
glass (Monolithic)
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Laminated
glass
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Double
glazing (IGU)
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Double
glazing (IGU) with laminated glass
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| This
section features performance comparison tables, definitions,
thermal stress, types of glass and surface
positions, cleaning, on-site protection and statutory
and regulatory requirements and provides important
information for glazing designs. |
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