What type of brick is most impacted by weather conditions?

Unfired brick is particularly susceptible to weather conditions due to its composition and lack of thermal treatment. Unlike fired bricks, which undergo high-temperature processing that enhances their strength and durability, unfired bricks are made from natural materials such as clay or mud that have not been hardened through firing. This results in a porous structure that can absorb moisture, leading to potential degradation when exposed to rain, freeze-thaw cycles, or direct sunlight.

The water content in unfired bricks can cause expansion when wet and contraction when dried, potentially leading to cracking and structural failure over time. In contrast, fired bricks have a more robust structure and are designed to withstand various environmental challenges. Understanding the vulnerabilities of unfired bricks is essential for proper construction practices and material selection, especially in climates where moisture and temperature fluctuations are prevalent.