Why safety, strength and solar gain will all determine what glass you need for a glass extension
Briefly

When planning a glass extension, selecting the appropriate glass type is critical. Factors such as safety, strength, and solar gain should be considered. Options include double or triple glazed, acoustic glass, and heat-producing glass. For glass box extensions, a structural engineer's input is essential. Safety glass is important for walls, roofs, and doors. Toughened glass is stronger and safer than ordinary glass, while laminated glass offers additional safety. Heat soaked glass may be beneficial for glass roofs to reduce breakage risks.
"For applications like glazed walls, roofs and windows or doors then a safety glass is a necessity," says Edward Stobart, technical sales manager at IDSystems. "Toughened safety glass is treated in the manufacturing process to be significantly stronger than ordinary glass and if broken breaks into blunt pieces. Alternatively laminated glass is two panes of glass with a polymer interlayer - much like a car windscreen - which, even if broken, the pane shatters but holds together providing an extra level of security and safety."
Considering a glass roof extension idea? "For glass roofs you may also wish to consider heat soaked glass which significantly reduces the risk of nickel sulfur glass breakage that often leads to issues post installation."
Read at Homebuilding
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