The strong choice
Fully tempered glass is four to five times stronger than annealed glass, and breaks into dull-edged particles that are less likely to cause serious injury, such that tempered glass can satisfy safety glazing requirements. The higher strength of tempered glass is advantageous in point-supported and other specialty applications.
How it's made
Tempering involves heating annealed glass to over 1,000 degrees F, then rapidly cooling the glass surfaces to create permanent compressive stress.
Manage moderate thermal stress
Heat-strengthened glass can be advantageous in vision glazing applications that do not require the surface compression of fully tempered glass. In the event of breakage, heat-strengthened glass breaks into larger shards, similar to annealed glass. When heat-strengthened glass breaks, it is more likely than fully tempered glass to be retained within its framing system.
Reduce the risk of spontaneous breakage
Heat-soaked glass significantly reduces the risk of breakage caused by nickel sulfide (NiS) inclusions. While very rare, the risk of NiS cannot be eliminated from the float glass process. Due to the high surface compression of fully tempered glass, NiS inclusions can cause spontaneous breakage. The heat-soaking process helps to cause NiS inclusions to change size and break during the process, rather than after installation.
Guardian SunGuard® coated glass can be safely heat-soaked if it is determined the heat-soaking process is necessary. Explore our SunGuard coated glass below.
Improve security, safety and comfort
Guardian tempered glass can be combined with numerous ClimaGuard® residential glass and SunGuard® coated glass solutions.