Considering the energy needed to manage interior temperature, together with high electricity costs, energy efficiency should be a prime concern in the design, specification and construction of new buildings.
Although SANS 10400 Part XA and SANS 204 do not dictate the installation of insulated glass in all new buildings, double glazing’s thermal performance is significantly higher than single glazing. “Even the most basic unit comprising clear glass with a standard dehydrated airspace of 12mm will improve the energy efficiency of a window by over 50%,” FG Trading’s Laura Strydom points out.
In addition, double glazing also increases wind load resistance, noise reduction and improved comfort behind the glass due to less radiation.
Specifying double glazing
The thermal performance of a double-glazed unit varies based on the size of the air cavity, the type and thickness of the glass, and whether the unit cavity is filled with dry air or an inert gas.
To help guide AutoSpec users and uphold industry standards, FG Trading has introduced a double-glazing range which serves as an informative specification.
“We encourage architects and specifiers to seek assistance in specifying the correct combination of components to satisfy energy-efficiency requirements, as well as consult technical experts to prevent potential failure of double-glazed units,” advises Strydom.
“It is imperative that the specifier verifies the source of the components as well as the type of system to ensure that only high-quality components are utilised, and are supplied from a reputable and specialised supplier,” she adds.
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The basic components of an insulated glass unit.