Stoneware — generic term used to describe a wide range of tiles that are fired at a relatively high temperature, resulting in a vitrified body. This firing process transforms the clay into a dense and non-porous material that is highly resistant to water absorption and frost damage, making it suitable for exterior applications on buildings.

The firing temperature for stoneware tiles typically ranges between 1100 to 1300 degrees Celsius, depending on the specific composition and desired properties. This high firing temperature causes the clay particles to fuse together, creating a strong and durable structure that can withstand the rigors of outdoor environments.

Its vitrified nature prevents water from penetrating the tile, protecting the underlying structure from moisture-related issues. Additionally, stoneware's resistance to frost ensures that it won't crack or deteriorate when exposed to freezing temperatures.