Red Seal Bricklayer Practice Exam

Why is it important to wet bricks prior to laying them in hot weather?

1. To enhance their color

2. To prevent rapid moisture loss from the mortar

3. To increase the adhesion of the mortar

4. To allow for better chipping

The correct answer is: To prevent rapid moisture loss from the mortar

Wetting bricks prior to laying them in hot weather is a crucial practice to prevent rapid moisture loss from the mortar. In high temperatures, mortar can dry out very quickly, which compromises its strength and bonding capabilities. When bricks are dry, they can absorb moisture from the mortar, leading to a phenomenon known as "thirsty bricks." This can cause the mortar to set too quickly, resulting in weak joints and potential structural issues. By moistening the bricks beforehand, it helps to maintain the balance of moisture necessary for optimal curing of the mortar, allowing for a stronger and more durable bond between the bricks and mortar. Enhancing the color or increasing the adhesion of the mortar aren't primary reasons for this wetting process. While wet conditions can contribute to better adhesion in a general sense, the primary concern in hot weather is the preservation of moisture within the mortar for proper curing. Chipping, while related to brickwork, is not affected by the wetting process in the context of setting bricks and mortar.