Heat-strengthened glass

522 Lady Street

Bring on the wind loads and thermal stress

Guardian heat-strengthened glass is the preferred choice for projects where safety glass isn’t necessary, but resistance to wind and heat is key. Heat-strengthened glass is cooled at a slower pace, creating glass twice as strong as annealed glass. When broken, the fragments are larger than tempered glass but are less prone to spontaneous breakage. Our heat-strengthened glass is an excellent choice for projects using tinted, reflective, low-E and spandrel glass—options all available through Guardian SunGuard® coated glass.

Explore our SunGuard coated glass below, or learn more about heat-strengthened glass with our glossary .

How Heat-Strengthened Glass Is Made

Guardian Glass SunGuard - Hearst Corporation building

SunGuard®

High-performance architectural glass that helps architects and designers Build With Light®.

Learn more

SunGuard Select Fabricators

SunGuard Advanced Architectural Glass is designed so it can be heat-strengthened by our network of independent SunGuard Select Fabricators. Our fabricators can help heat treat glass more quickly and closer to your project site for faster replacements and shorter lead times.