Heat-treated Glass

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Heat Strengthened Glass

The process of heat-treating used to manufacture heat-strengthened glass involves heating the glass in a high-temperature furnace and then cooling both surfaces with air. The surface compression of heat strengthened glass reaches 3500-7500 psi (25-50 MPa). Heat-strengthened glass cannot be considered as a safety glass.


  • Its strength is approximately two times that of annealed (non-tempered) glass of the same thickness.
  • It offers increased resistance to wind and snow loads as well as high thermal stresses.
  • Glass breaks into large, slightly sharp fragments
  • When broken the adhesive applied over the surfaces holds the glass together, providing a temporary fix until the pane is replaced
  • The glass maintains its colour, its chemical properties and its light transmittance after heat treating

Standards and certifications

ANSI Z97.1 – Safety glazing materials used in buildings,
ASTM C1036 – Flat Glass,
ASTM – C1048 – Heat-treated flat glass,
CPSC 16 CFR- 1201 – Safety Standart for Architectural Glazing Materials


  • Clear, ultraclear, tinted
  • Low-e
  • Reflective


  • Insulated Glass Units
  • Spandrel Glass


Consult the tools section for all our documentation.


  *Certain conditions apply, contact us for more information.

Research Centre of the University of Montreal Hospital Centre