One day you hear a sudden noise and realize that the oven door has been smashed in. Why does this happen?

Although rare, such incidents can be linked to the properties of the glass and the stresses it is subjected to.

Here is an analysis of the causes and tips to avoid this problem.

Main causes: glass under heavy use

The door of a furnace is made of tempered glass or borosilicate glass, which has been chosen for its furnaces.

Tempered soda-lime glass: It is commonly used and withstands heat well, but can be sensitive to extreme thermal shocks.

Borosilicate glass: It is less commonly used in home ovens, but it is very resistant to temperature changes.

However, cracks can occur due to:

Microscopic defects such as nickel and sulfur inclusions in glass.

Repeated exposure to intense heat cycles, especially when using the self-cleaning mode.