PROJECT GLASS · HEAT-SOAK TEST
What Is Heat-Soak Testing? How It Differs from Tempered and Heat-Strengthened Glass
Heat-soak testing is not simply “more tempering.” It is an additional test process applied to tempered glass and may be specified in façade projects as part of spontaneous-breakage risk management.
What is heat-soak testing intended to do?
The process is used to help reduce the risk associated with certain inclusions in tempered glass by subjecting finished panes to a controlled heat cycle intended to identify susceptible pieces.
How is it different from tempering?
Tempering is the production process that changes mechanical strength and breakage behaviour. Heat-soak testing is an additional step performed after tempering.
Is it the same as heat-strengthened glass?
No. Heat-strengthened glass is a different level of heat treatment, while heat-soak testing is a separate risk-control process typically associated with fully tempered glass.
Why is EN 14179 referenced?
European project specifications may reference EN 14179 for heat-soak tested thermally toughened soda-lime silicate safety glass. The exact project scope should still be checked.
What belongs in the RFQ?
State glass type, thickness, dimensions, coating/printing, tempering requirement, heat-soak test standard, reporting or traceability expectations and project destination.