Tempered glass is stronger than standard glass and does not shatter into large shards when broken, this is important because it can greatly minimize potential danger in the case of a break. Manufactured through a process of extreme heating and rapid cooling, tempered glass is much harder than normal glass.
In the case that tempered glass does break, it shatters into small pebbles that are void of dangerous, sharp edges. As tempered glass is considered to be much safer than normal glass, you may often here it referred to as safety glass or toughened glass. Tempered glass has a wide variety of uses and you’ll find in just about everywhere. In fact, the shower doors in your bathroom or the side glass on a motor vehicle are examples of tempered glass.
Another benefit of tempered glass is the ability to stand up to moderate heat (470°F). The process that creates this strengthened glass also makes it heat-resistant. This makes tempered glass a great solution for a situation where there is a danger of the glass breaking due to impact or moderate heat. Tempered glass is often used for fireplace doors (not woodstoves), on masonry and prefabricated fireplaces equipped with a grate to hold the burning wood. If tempered glass is exposed to higher temperatures, it gradually weakens the structure of the glass thus making it more susceptible to breakage.