What is the usual temperature range for firing structural clay products?

Structural clay products, such as building brick and tile, are typically fired at temperatures ranging from 1,050° to 1,100° C (approximately 1,925° to 2,000° F).1

These relatively low firing temperatures are sufficient because the raw materials—which include clay, quartz, and feldspar—contain impurities that melt to form a glass, effectively bonding the particles together. Maintaining this specific temperature range is critical; if the products are underfired, they may lack strength and frost resistance, while overfiring can result in excessive glass content, making the material brittle and susceptible to stress.1