Red Seal Bricklayer Practice Exam

Using clay bricks in extreme weather poses the primary disadvantage of potential cracking due to moisture absorption when exposed to freezing temperatures. This is because clay bricks can absorb water, and when the temperature drops, the water within the brick can freeze and expand, leading to stress and ultimately cracking in the brick. This issue is particularly pronounced in regions that experience freeze-thaw cycles, where the repeated freezing and thawing can exacerbate the problem, compromising the structural integrity and aesthetic appearance of the bricks.

The other options do not focus on the key issue associated with extreme weather. While weight may impact handling and transportation, it does not directly relate to performance under freezing conditions. The fading of color can occur over time regardless of weather, and while fire resistance is an important property, it isn't specifically a disadvantage related to extreme weather conditions like freezing temperatures. Thus, the moisture absorption leading to cracking is the most critical concern when considering the use of clay bricks in such environments.